Listening Test Results Axiom EP500 vs SVS PB12-Ultra

jakeman

Standard Member
I had the privilege of being one of 6 attendees at a blind listening test for the Axiom EP500 and the SVS PB12-Ultra conducted on Sunday, November 20, 2005 at the home of Craigsub. The session was 3 hours long in a dark HT room where the listeners had no reference to which sub they were listening to or where the subs were located. A variety of DVD material and music material were heard and the results individually reported. A summary and individual reports appear as follows:

Summary by RayW


We did the subwoofer listening test at Craig’s and a good time was had by all. Craig’s home is beautiful with living space attached to his Home Theater array and he has 2 theaters, a living room with a RPTV set up and a bedroom TV in the event one of the other areas wasn’t available.

As Craig pointed out, I got the opportunity to provide this summary. I have no agenda with the results and didn’t project anything into the event beforehand. Didn’t care who/what won. Felt everything was done on a level playing field, and don’t feel the need to begin peeling the onion to find flaws in the methodology. I accomplished my purpose of enjoying a nifty GTG, saw some old friends and made some new ones. Interesting how getting together based on this passion and spending some time face-to-face talking eliminates garbage that sometimes shows up in threads and just enhances the day. To be sure, discussion was lively, but all within the parameters of “ain’t this hobby a hoot?” and disparate views were accepted with good humor underpinning the day. Nobody got sweaty and there was no hitting.

I’m not technically immersed in this to the extent many others are, so I just try to find something I like and enjoy it. While the opportunity to do the testing and come away with the chance to explain to my wife why I need a new subwoofer (she will then tell me what my REAL opinion is), I also came away with an improvement in my understanding of the whole LFE piece (not to mention that ringing in my ears). Most importantly, I also made some new friends.

Let me set the stage a bit, in no particular order. We had six sets of ears comprised of myself Ray W, not Ray1), Bossobass, Jeff2D., Jakeman, Jeff2D.jr, Rijax. (it is worth noting here that Jeff did NOT bring the collection of other people sharing his AVS avatar!)
Let me set the stage a bit, in no particular order.

- The test was conducted in the main theater, a large room (approximately 22’x25’ with an 81/2 foot ceiling). Difficult audio space with hardwood floors and glass surfaces and the ACI speakers and subs were EQ’d (to be flat).

- The room was set up for light control and darkened for use with the front projector. Between the dark room and the way the subs were hidden/camouflaged, there was no need for blindfolds. We couldn’t see each other in the room, let alone the subwoofers. In fact, until the test were done, we didn’t even know where the subs were physically located.

- Craig spent the day setting up the subwoofers for the test and he did this without anyone else in the room. We did not know what subs we were listening to until after the tests were done, notes were taken and individual results tabulated. Craig did not participate in the rankings and gave no input until all was completed and the sheets with the information was turned in.

- There was a couch that sat three approximately 15’ from the screen and a row of 3 seats directly behind the couch. The seating was consistent, with each person sitting in the same position each time.

- Everything was driven by Onix electronics - an Emotiva DMC-1 Pre-Amp/Processor and an Emotiva MPS-1 Seven Channel Amplifier.

- We listened to 4 subwoofers. Each listening period took 25 minutes or so, followed by 15-20 minutes of discussion and each person making their own notes for each of the 7 categories.

- The listening material, the same each time, included several selections form the Animusic2 DVD, the opening scene from “Master And Commander” when the French frigate first attacks in the fog, the scene in “The Day After” when the tsunami hits NYC and a cut from a Holly Cole CD.

- Once the tests were completed, there was an opportunity to go back and listen to each of them if desired.

Subwoofers owned/in use by the attendees:
Me = SVS 20-39 PCi
Rijax = Onix UFW-10
JeffD2 / Jeff2Djr = SVS PB10-ISD
jakeman = SVS PC-Ultra and Axiom EP-600
Bossobass = Quad Tumults in sealed enclosures
craigsub = one of everything ever made

The subs we auditioned, all tuned flat, except as mentioned for B (you devil, Craig):
-Sub A = SVS PB12 Ultra tuned to 20hz
-Sub B = Axiom EP500 with a 5hz bump
-Sub C = SVS PB12 Ultra tuned to16hz
-Sub D = Axiom EP500

Ratings by person, in order of preference:
JeffD2 : EP-500 + 5 dB, EP-500, SVS 16 Hz., SVS 20 Hz.
JeffD2jr: EP-500 + 5 db, EP-500, SVS 16 Hz., SVS 20 Hz (something in the gene pool? )
jakeman: EP-500 + 5db, SVS 16 Hz., EP-500, SVS 20 Hz
Bossobass: EP-500, Tie with SVS 16 Hz and EP-500 +5 dB, SVS 20 Hz
Rijax: SVS 16 Hz., EP-500, EP-500 + 5db, SVS 20 Hz
Ray W: EP-500, EP-500 + 5db, SVS 16 Hz., SVS 20 Hz

To save some calculation time, awarding 7-5-3-1 points for 1st, 2nd, 3rd and 4th place, here is the finish based on 12 ears listening in relatively even, unbiased conditions (charts/graphs are nice, but you can't hear them):
EP500 = 33 points
EP500 + 5db = 30 points
SVS PB12 Ultra tuned to16hz = 26 points
SVS PB12 Ultra tuned to 20 hz = 7 points

I’ll add some brief personal comments - the other ears have already covered much of the ground for me here. The first three finishers were stellar. Excellent room shaking, chest punching and butt vibration. The music was also handled very well. With the 5 db hump, the EP 500 was a bit muddy. Otherwise, the LFE was crisp and well-defined. What I noticed especially with the EP 500 was the quality of the LFE detail at higher levels, especially when listening to the pieces of wood clattering around as the French frigate (love that word!) turned the British ship into kindling.

I love my SVS, but the EP 500 did EVERYTHING well and I was very surprised with its performance. Remarkable box with three words coming to mind - extension (both ways), punch and detail.

Finally, Craig was a gracious host and the event was well done. You other characters - thanks for a great day!

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Jeff2D Report


Six people including myself were invited to Craig’s house for the DBT. Craig would not be participating in the evaluations since he was in charge of changing out the subs in between the audio demos. Though we all knew from the forum that there was the potential for six subs to be evaluated, we were not told which ones we would be listening to.

We spent the first 20 minutes getting to know each and discussing personal preferences as related to audio. Soon after, we went into Craig’s theater to listen to, not yet judge, the audio material and familiarize ourselves with it. It was decided for music we would use Animusic 2 and a jazz track that had some nice string bass in as well. For movie sound, a couple of clips from the DTS demo disc. The movies clips used were-
Day After Tomorrow- Tidal wave hits NYC
LOTR ROTK- Gates of Mordor
Master & Commander- Opening battle scene where initial cannon bursts are shot through the fog.
We would eventually narrow it down to just Master & Commander as the criteria.

It was agreed we would listen to music at a set up of running the subs flat, but for movies we would run 5dB hot which I would imagine a typical user would do to help pressurize a large room.

Now that we were settled in, familiar with the material and had a point of reference, it was time for the judging to begin. It should be noted that we had absolutely no idea where the subs were placed in the room. It should also be stated that we had the option of reevaluating subwoofer A if necessary based on a personal decision not as a group.

I used a scoring system of 5 stars for best, 1 star for worst. 30 points would be a perfect score. I am also writing this strictly from memory and have yet visited the AVS thread so as not to become jaded in any way. Any inaccuracies I may state here will acknowledged and addressed after I post this. I also run my home system 6-7dB hot for the sub.

Subwoofer A-
Clearly the weakest performer. I found myself wondering if Craig had his mains set to large and the sub off line. This sub added nothing to the movie LFE and was generally unremarkable with music. Horribly disappointing. This sub rated 14 points.
This would turn out to be the SVS PB12 Ultra in 20hz tune.

Subwoofer B-
A dramatic difference from sub A. I found the kick drums in the music perfectly suited to my tastes. I liked the extension this sub displayed on the synthetic bass of the Animusic tracks. I did however find it to be a bit muddy on the jazz track. As I recall, all the listeners noted this. I found myself grinning and thinking “hell yeah” during Master & Commander. Here’s the catch- Craig had induced a 5dB bump at 25hz just to make sure we were all listening. So, why did I like this one so much? Because I have a 5dB room peak at about 22.5hz that I have not yet BFDed. It sounded just like my home system! I was willing to live with the mud because IMO performed wonderfully in other categories scoring some 5s along the way. Total score –27 points.
This would turn out to be Axiom EP500 with the induced bump.

Subwoofer C-
Another good sounding sub. Performed quite well musically and was solid on the movie tracks. But there was bump in the road on the way to drawing a conclusion. About ¾ of the way through Master & Commander, I realized Craig had not changed the settings to run 5dB hot, but rather left it at flat from the music. I brought this to his attention and it was corrected. We replayed Master & Commander. I was going to give this sub high marks, but it simply could not handle the 5dB bump. It was obviously compressing and clearly not could carry the extra load. This would be reflected in the score. Total points- as I recall, about 21.
This would turn out to be the PB12 in 16hz tune.

Subwoofer D-
Another fine performer in stark contrast to sub A. Performed wonderfully on the kick drums and the jazz track. Performed quite well on Master & Commander though I did detect some ringing on one of the huge cannon bursts. For my tastes, just not quite the punch of sub B, but better than A and C. Total score- 24 points.
This would turn out to be the Axiom EP500 with no 25 hz. bump.

Time would not allow me play a track from Ozzy Live at Budokan as song choice for personal reference, as I had a six hour drive home ahead of me. But if I had stayed longer I would have chosen the Axiom EP500 to listen with.

IMHO- Winner- Axiom EP500.

Don’t anyone EVER call me an SVS fanboy.


Rijax Report



Subwoofer A - (which turned out to be the SVS Ultra in 20Hz tuning.
Like Jeff, I felt this was the weakest performer, though I wouldn't describe it's performance as "horribly disappointing." It just didn't measure up to the others. Learning which sub it was, provided the 3rd biggest surprise of the day. Unlike Jeff, I had no doubts that there was a subwoofer in the mix. This particular difference between Jeff's impression and mine can be explained by how we are acclimated to the different settings of our home subwoofers. This sub came in 4th in my ratings.

Subwoofer B - (which turned out to be the EP500 with a boost centered at 25Hz.)
Noticeably better than subwoofer A. But as we went through the various tracks and movie scenes, I felt that the sub was (using my own, completely unscientific, term) boomy. Too much "ring." Others later described this same phenomenon as "muddy." In fairness, I found one or two of the Animusic tracks, particularly the one that was solo drums, to be a bit "boomy" on every sub. Were it not for the fact the other Animusic tracks resulted in relatively tight, crisp bass on the other 3 subs, I might have assumed this "boominess" was native to the tracks. This sub came in 3rd in my ratings.

Subwoofer C - (which turned out to be the SVS Ultra in 16 Hz. tuning.)
To me, this sub sounded clearly better than the first two. I cannot argue with Jeff's compression assessment with the 5 dB bump for movies. You can chalk this up to my inexperience. I wouldn't know compression if I heard it, probably because I've never heard it. I live in a townhouse with a wall common to my neighbor. I don't listen anywhere NEAR the levels we listened to at Craig's. This sub came in 1st in my ratings.

Before I go on to sub #4, a little digression. My single biggest concern about this listening session was the fear that, after listening to all 4 subs, I would be sitting there thinking "Holy carumba! I can't really tell any difference between the 4." Needless to say, at this point in the listening, being able to easily hear noticeable differences in the first 3 subs, I was feeling pretty cocky and confident. And then we listened to :

Subwoofer D - (which turned out to be the EP500 tuned flat.)
OH OH! I don't hear much of a difference between this one and Sub C. OK. OK. I don't hear ANY difference. I thought it did a great job as well. To my relatively inexperienced ear the two were a wash. It never occurred to me to have a tie, so this sub came in 2nd in my ratings by one single point. Had I heard this sub BEFORE #3, I very well might have picked this one.

The 2nd biggest surprise of the day was the fact that we had been listening to only 2 subs and not the 4 we expected. To me, the biggest surprise of the day was the difference between the SVS Ultra in 20 Hz. tuning, and the same sub in 16 Hz. tuning. IMHO, the difference was night and day. Amazing.

IMHO, it's a wash between the SVS Ultra in 16 Hz tuning and the EP500 with a lean toward the EP500 simply because of the limitations of my room.

Don't anyone EVER call me an Axiom fanboy

Seriously, I DO wish that many of those who will be doing their mightiest to discredit this whole thing could have been there. I will reiterate what I said in my earlier post. This was a hell of a lot of fun! And, the best thing about it was the people. Hanging out with people who share your passion for a hobby is extremely rewarding.

A BIG thanks to Craig for hosting the thing, and to his lovely wife for enduring this "invasion" of audio nuts.


BossoBass Report


I had an excellent time. The House of Chase is certainly large enough for a G2G and is meticulously kept in every way. The Main theater room is large and on the 'live' side.

I chose not to inspect ANY of the equipment, placements (other than the FL/CC/FR, which I could see well enough, but not tell what they were), etc. I just walked into the darkened room and sat in the sweet spot. Well, it was open...and I was the last to enter...wouldn't YOU have grabbed that seat, too?

First, being in a room for the first time and not knowing the particulars is a bit scary as far a comments on 4 subwoofers. Still, the session was just long enough for each of the subs and contained a pretty good mix of sound that it all seemed a bit less daunting in the end.

So, there I was expecting to hear a UFW-12, SVS PB Ultra, Axiom EP-600 and the big Velo DD-18. With all of the above in mind, here goes my impressions:

Sub A: My notes were that it sounded a bit thin and a tad bottom heavy. Also, that it had good extension and overall was a good sub.

Sub B: This sub was definitely bottom heavy. That usually kills it for me. So, I liked this one the least, though I still noted it to be a pretty good sub otherwise.

Sub C: This sub sounded better than the first 2. Still a tad bottom heavy, which I personally attributed to the room at this point and not having the faintest clue that it was not a 3rd sub at all, but 'knowing' at this point that 2 of the sub were sealed and 1 of them I know fairly well. It was fairly seamless, excellent extension and smoothly calibrated...just a tad heavy on the bottom, which is not so offensive with M&C but an illusion robber with music and the new Animusic animations.

Sub D: This sub is the one I like the best of the '4'. It sounded seamless. Again...just a smidge bottom heavy, but less than the other 4. Every bit as well calibrated as Sub C. Just as smooth and clean sounding. Just that C was muddier, which was apparent only slightly with M&C, but moreso with the other source material.

In the end, I liked all 4 subs, with the above noted differences, and...clearly, all things considered, liked Sub D overall the best.

I went all the way out on the blind listening limb in my notes and wrote that if I had to guess, I would ascribe as follows:

Sub A= UFW-12, Sub B and Sub C I picked as a toss up between the 2 ported subs and Sub D would have had to be the Velo. I was as surprised as everyone to learn the 'trick' Craig played, but in the end, it sort of fit with my general thoughts and it certainly was a great session and loads of fun.

Bottom line is that as far as Craig's set up and hardware go, the Ultra DEFINITELY sounds it's best in 16 Hz tune and is a superb subwoofer. The Axiom EP-500 is also a very surprising performer, IMO. It was the most detailed sub system of the 4 and had good presentation of the powerfully low stuff without masking the rest of the freqs, compared to the other '3'.

Afterward, as John mentioned, we went down stairs to another excellent system and listened to some exquisite monitors with stereo UFW-12s The sound was sweet as it gets and Dr. Hsu's demo disc is a great one to test any system.

Dinner at the CC was an enexpected treat, The food was excellent and we jawed like we know what the heii we're talkin' about. I love that at the end of a great day. I didn't mind at all being thrown the 2 subwoofer curve ball. I feel privileged to have been invited and to have met some great new friends and exchanged e-mails/names/numbers, etc.

Alas, I flew away still having never heard the DD-18 Velo, but hopefully there will be another time.


Jakeman Report


Ray. That was an excellent summary well done. I really got a kick out of sharing impressions later with you, Bosso, Craig and Rijax and I wanted to give you the courtesy of posting all your hard work. For a second I thought you had car heater problems at the fuel station but I see now it was your home heater.

I noted earlier the room acoustic factor which to my ears made all these subs sound muddy and somewhat bloated. That was very evident to me in the Holly Cole opening which features Holly's lovely voice accompanied by a wonderful loud string bass. None of the subs did it justice and despite me being aware of the room's acoustics reconfirmed to me why it is best to turn off the subs when listening to music. I also noticed the lack of stereo bass and accompanied harmonics was missing. So I didn't rank any of them highly for music with the only one being slightly easier to listen to was the flat 500. Looking at HT.

Subwoofer A Ultra in 20hz

I have to agree with everyone here that it was the worst of the lot. Very muddy even in movies and blurry sounding. Didn't hit and get out of the way which showed up in the amimusic spyro drum sequence and Master and Commander. I also like my bass loud so in the nearfield position I lucked into with Ray the SPLs weren't there either. I never liked 20hz at home either. #4 and well below the other 3.

Subwoofer B 500 bumped

On my sheet I wrote 600? but something was missing. Nice headroom in the mid to upper bass but where was the extension of the 600. Maybe it was the 600 and the room acoustics were getting in the way. Now I see the bump skewed the SPLs up and weakend the low bass extension. Still for movies an interesting setting I haven't tried and the power, speed and slam was very evident in M & C. Liked it much more and ended up my #1 choice.

Subwoofer C SVS 16 HZ

There was the extension I was looking for and that came through in the battle scene and the dropping stone in animusic. But what happened to the mid and upper bass. Much less SPLs in the cannon scene and in gyro drums compared to 500 bumped so despite my liking extension alot it received 2nd place.

Subwoofer D 500 flat

Holly Coles bass finally started to sound familiar but not the headroom of subwoofer B and didn't hear the extension of Subwoofer C. Tough call for me between this one and the SVS at 16 hz. Should have been a tie but less extension dropped it to 3rd. If I was ranking musicality this one would have been 2nd above the SVS 16hz but I thought they all did Holly Cole a disservice so the best of a bad bunch wasn't worth weighting.

A very memorable day for me and a privilege to share it with Craig, Dave, Ray, Jack, Jeff, Nick, Susan, the kids and Tex, the most friendly doberman I have ever met.


The Subwoofer Torture Test Jakeman


I wanted to make sure it wasn't a problem with my cylinder Ultra as well. We trotted back upstairs after listening to some Dire Straits on Craigs excellent downstairs setup. Soundhound Organ disc #2 was recorded by an L.A. recording engineer who shall remain nameless in a cathedral for his own testing of his formidable home audio system. It is my favourite subwoofer torture test because that church organ cranks out loud subsonic notes to 8 hz at high SPLs as well as huge swings in volume and frequencies. Basically it kicks the hell out of the driver, limiter, filter and amp. I cautioned Craig to stay close to the volume dial on his processor,

Track #4 starts out slow enough and almost puts you to sleep until 1 minute in when the huge pipes dig deep. At that point the Ultra started to gasp and chuff out of the 3 ports with other unworldy noises coming out of the driver. Clipping I thought. I noticed the windows rattling and heavy vibration in the floor. Craig lowered the volume way down before the stress stopped in the Ultra. I thought I heard Tex barking.

Next up in the torture rack was the 500. A bit further after the 1 minute mark we started to hear some chuffing and port noise but much less than the Ultra then it went gradually quite as the DSP chip kicked in.



Unanimous Verdict: Axiom EP500

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Further details of this listening session can be read at the AVS forum starting here
http://www.avsforum.com/avs-vb/showthread.php?p=6571313#post6571313
 

Jeff

Distinguished Member
I presume the subsonic filter on the Ultra was also changed to 16Hz when one of the ports was plugged, pity, it's the port plugging that makes the positive difference IMO. Lowering the subsonic filter isn't such a great move.
 

Knyght_byte

Distinguished Member
that musta been a fun day out ;-)

but i take it the final conclusion is that my REL Strata 5 still ruled them all........no?...waaaaaaaa.....man u guys gotta stop picking on my poor REL :-(

heh ;-)

seriously tho, good to read this, the more competition the better, means we all end up with better products cheaper (eventually...lol)
 
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FoxyMulder

Guest
If someone wants to send me their SVS PC-Ultra or Axiom subs i will gladly do a comparison test myself, it may take 5 or 6 years though as i like to go slow.
 

Kazman

Well-known Member
Stop it!!!!

(I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU)

(I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer)

:rolleyes: I don't think it's working! :suicide:
 

Hungry Horace

Active Member
From the review over at Audioholics we know that the EP500 doesn't have the last word in extension, or SPL, and compared to the Ultra it shouldn't because it has a smaller enclosure, and less stroke. The review also shows severe compression setting in as soon as 25hz

http://www.audioholics.com/productreviews/loudspeakers/AxiomEP500reviewp6.php

Compared to the Ultra the EP500 looks like it will ignore all the subsonics in the M&S scene, and it shouldn't be able to play as loud, yet so many preferred the EP500 for this scene?
 

Andywilliams

Active Member
Kazman said:
Stop it!!!!

(I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU, I love my PCU)

(I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer, I DON'T need another subwoofer)

:rolleyes: I don't think it's working! :suicide:
Hi kazman
From what ive found myself the tubes seem to do a better job than the box subs so i wouldnt rush in to anything as i made that costly fault with the svs pb-12 ultra-2.
 

jakeman

Standard Member
I agree with Gonzo. The cylinders have less flex than the boxes because of the geometry which results in a smoother sound.

Kazman. I still have my Ultra but its been behaving like a jilted girlfriend lately. :D You really should go for a second sub. It's amazing how it fills out the bass throughout the room.
 

Hungry Horace

Active Member
The cylinder form is great when it comes to strength/weight ratio. A box needs bracing, but to much bracing will affect the internal volume negativly. I can see that both the EP500, and the EP600 was noted for lacking bracing according to the Audioholics reviews, yet it doesn't seem to affect performance if the listening session is to be believed. So I guess a rigid box isn't important to everyone, all the time.
 
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Rijax

Guest
Hello everybody. As many of you may know, there has been a lot of contentious arguing among fans of both subwoofers at other forums (fora? forae? I've forgotten my 9th grade Latin). I just wanted to point out that this was a completely subjective evaluation. The results reflect opinions by those guys (us), on that day, in that room. You, on a different day, and in your room, might feel differently. So, no one need feel badly about their current sub, regardless of brand.

Also, I would point out that though most preferred the Axiom, nothing said at the gathering would support the implication that SVS makes anything other than a fine product. The conclusion that CAN be drawn from this gathering is that, contrary to what many have said regarding the Axiom, BOTH are excellent subs, and are worthy of consideration. Are there better subs available? I suppose there are. However, I think most of us would be very satisfied with either the Axiom or the SVS.

If you share the passion of the participants in this gathering for quality audio/video, then I highly recommend hosting or attending one yourself. It was wonderful learning experience, and great fun.
 

jakeman

Standard Member
I took apart a 600 and the build/bracing looked fine. Definitely well braced and strong. That beast weighs over 100lbs so it has to be well braced. I haven't taken apart a 500 but it also looks/feels very substantial. Everyone at the meet agreed afterward it was clearly the better sounding sub compared to the box Ultra. The subs at the listening session were all boxes. HsuResearch designed the first cylinder which SVS, with Dr. Hsu's advice , morphed into their cylinder line which I believe are still their finest products. Having said that, the 600 sounds much better than the cylinder Ultra in my room which is why I am seriously considering selling the Ultra for another 600.
 

Kazman

Well-known Member
I might give Axiom a call and see if they will lend me one for a review :)
 

AngelEyes

Distinguished Member
Hi Rijax, welcome to the forum :)

If you share the passion of the participants in this gathering for quality audio/video, then I highly recommend hosting or attending one yourself. It was wonderful learning experience, and great fun.

What a great idea, cmon who wants to show me how to setup my sub in the comfort of your own home? Will bring beer :thumbsup:
 

jakeman

Standard Member
People here have the best avatars. Angeleyes I love it. :thumbsup: I better get with the program and find one myself.
 
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craigsub

Guest
Jeff said:
I presume the subsonic filter on the Ultra was also changed to 16Hz when one of the ports was plugged, pity, it's the port plugging that makes the positive difference IMO. Lowering the subsonic filter isn't such a great move.

Jeff - Are you suggesting that putting a port plug in but keeping the filter at 20 Hz works better in the Ultra ? If so, that seems like an interesting experiment.
 

AngelEyes

Distinguished Member
Why thank you, without the avatar I was consistently mistaken for a girl :rotfl:
 
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Rijax

Guest
AngelEyes said:
Hi Rijax, welcome to the forum :)
Thank you. It's a pleasure to be here (of course, at my age, it's a pleasure to be anywhere ;) )

My ancestry can be traced back to the UK. The first of my family to cross "the pond" arrived on this shore in 1630 on a ship called the Arabella (I was born shortly thereafter ;) ). Also, I am a World War II history buff. For these reasons, I am a passionate Anglophile, and feel a strong kinship with all who reside in the UK. While we now have a diverse population in this country, to me, the UK will always be the Mother country.

Isn't the international aspect of the internet, for the most part, wonderful?
 
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craigsub

Guest
Rijax said:
Thank you. It's a pleasure to be here (of course, at my age, it's a pleasure to be anywhere ;) )

My ancestry can be traced back to the UK. The first of my family to cross "the pond" arrived on this shore in 1630 on a ship called the Arabella (I was born shortly thereafter ;) ). Also, I am a World War II history buff. For these reasons, I am a passionate Anglophile, and feel a strong kinship with all who reside in the UK. While we now have a diverse population in this country, to me, the UK will always be the Mother country.

Isn't the international aspect of the internet, for the most part, wonderful?

Angeleyes, Don't let Jack fool you. HE was on that ship. :D
 

AngelEyes

Distinguished Member
Rijax said:
Thank you. It's a pleasure to be here (of course, at my age, it's a pleasure to be anywhere ;) )

My ancestry can be traced back to the UK. The first of my family to cross "the pond" arrived on this shore in 1630 on a ship called the Arabella (I was born shortly thereafter ;) ). Also, I am a World War II history buff. For these reasons, I am a passionate Anglophile, and feel a strong kinship with all who reside in the UK. While we now have a diverse population in this country, to me, the UK will always be the Mother country.

Isn't the international aspect of the internet, for the most part, wonderful?

WWII History Buff... Anglophile? We must have been seperated at birth :D
 

AngelEyes

Distinguished Member
craigsub said:
Angeleyes, Don't let Jack fool you. HE was on that ship. :D

Nice to see Merrycan humour can still hold it's own :rotfl:
 
R

Ray**W

Guest
Ah, Great Britain and the United States. Two great countries separated by a common language! :hiya:

craigsub was right about Rijax being on the boat. Once you gain his trust, he will also tellyou the story about how dirt was invented; he saw it happen. ;)


On to the serious part of the program. The EP500 was an excellent chest-thumper. More importantly, a good time was had by all. If you get an opportunity, a similar GTG is worhtwhile regardelss of what is being tested.
 

Jeff

Distinguished Member
craigsub said:
Jeff - Are you suggesting that putting a port plug in but keeping the filter at 20 Hz works better in the Ultra ? If so, that seems like an interesting experiment.

:thumbsup:
 

jakeman

Standard Member
Hungry Horace said:
Compared to the Ultra the EP500 looks like it will ignore all the subsonics in the M&S scene, and it shouldn't be able to play as loud, yet so many preferred the EP500 for this scene?


Horace, the listening group heard and recognized the superior frequency linearity of the 500 compared to the Ultra. The 500 is indeed louder and smoother above 19hz. Also the Ultra is characterized by much more intermodulation distortion below 20 hz which is characteristic of the long throw TV-12 driver. You will find below a comparison which was prepared at my instruction in 4pi space (hanging the sub 70ft in the air on a windless day) and measured with the most advanced LMS software. In contrast, the measurements of the Axiom EP600 taken in the finnish shootout used less sophisticated software and was done in 2pi (on the ground) on a cold day which was not a true anechoic environment. That type of testing resulted in less meaningful measurements. Here is the 500/Ultra comparison of frequency response at 95db. Note that the Ultra loses 5db to 12 db between 40hz and 100 hz compared to the Axiom EP500. :)


5002020Ultra209520dB.jpg
 

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