Discussion in 'Subwoofers' started by Tejpal, Sep 25, 2002.
look at the subject...
Probably a nuclear powered hunter killer sub
Not the Kirsk then?
The usual responses are the Wilson XS and Krell reference. For the more affordable(<$5000), the VEL HGS18 and Aerial SW12 come to mind. The MK 5000,Klipsch rsw15 and paradigm servo15 are good ones too.
This, I'd say:
I'm sure Tom V's 'Dual SS Package' would also fall into the more affordable <$5000 category
Utterly bonkers!! My favourite is the crappy rug on the floor covering the sub cavity. Was his Nan throwing it out and he couldn't afford a new one 'cos he threw his cash into the building works? Sofa looks pretty tatty too
The SVS Ultra also slips well into the <$5000 category.
A custom build would be the way to go IMO.
I think I would tend to agree with Ramius, but then if money were no object, could you be bothered?.
I know - design it yourself and then get someone else to do the work, while you are out at another champagne dinner!!!
/wakes up and realises that a (EDIT - a very big) lottery win isn't very likely
This wall of speakers must be in the running
I have recently purchase 2 MJA Pro 50's for my setup and have had continued pleasure from them ever since.
I notice that The Pro 50 has now been noted as the all time best buy by What HiFi in the Awards issue of the current magazine.
What is more eciting is the launch of there first reference series sub which is called the REF 1 I think. the price is not large but the features and specs are major big.
Auditioned this model in store today and can only say that I have never seen such a beautifully made piece of kit for this price anywhere. the sound was jaw dropping and the sales guy played a track with some test tones which went down to 10Hz. My trousers were flapping to the frequency despite the downward firing driver.
This new company must be making the competition very worried.
So, MJ Acoustics are at it again then. As if a claim of 15Hz from their 50 watt 8" sub wasn't enough, they are now claiming 10Hz for a 120 watt 10" model.
These subs might be producing something down there but the output will have tailed off miles before then - I'd be surprised if the Pro 50 does much below 30Hz and I'd be amazed if the Ref 1 goes flat to 20Hz. By "flat" I mean there is no or little (no more than -3dB) drop in output.
Don't get me wrong, I'm not knocking their products which are good and great value, I just wish they'd be a bit more realistic with their figures i.e. quote +/- 3dB frequency ranges like most other respectable manufacturers do (REL being a notable exception).
You must have a different copy to me. It wasn't even the subwoofer of the year which still went to the REL for the umpteenth time running..
PS Joe, I have noticed that all nine of your posts this year have been singing the praises of the M J Acoustics sub. Is there something that you're not telling us ?
The way I read it The MJA Pro 50 gets Best Buy and this seems fair due to its price size performance ratio its not pretending to be a contender. The Rel Q150 gets the best sub woofer, now I dont know where this forum stands but IMO they got it right for the Pro 50 but they are well off the mark with the Q150 there are far superior subs out there that are worthy of the best sub award.
Have HiFi World ever listened to a Velodyne, or even considered what it takes to get motional feedback working correctly, or even considered any of the technical achievments like the digital amps and the drive units that stand up to being driven under resonance in a small box at such high power levels.
IMO all you need to win best sub award is an Audax Speaker a small cube a 150W amp and Oh! yes a REL badge.
I wish people wouldn't lump all RELs together. The ST range are a different kettle of fish and I'd propose the REL Studio as a contender for ultimate Sub.
100% right. Great post Matt.
You can feed a 10Hz signal to just about anything with an amp and driver and get something out at the other end.
The keyword here is "something"
Its how big and how clean that something is. At the risk of repeating myself. To get more than a distorted whimper at 10Hz, you need a big driver in a big box powered by a big amp. And if this device happens to be servo powered, you will also have the benifit of reduced distortion. Its that simple.
I first heard the MJ 50 with Ian J at the bristol show last year.
I also heard one last week. My opinion has not changed. This is a good mid-woofer, nothing more.
I had not lumped all Rels together i was merely making the point that I dont believe the Q150 should have the best sub award.
The Studio is a fantastic sub the best in the Rel range, so why does the Q150 get best sub award it's not even the best sub that Rel make, let alone the best sub available
Not from me they don't Dan
It's not just mja that claim the pro50 can hit 16Hz
These figures are for my pro50.
Eric why do call the Pro50 a midwoofer? MJA sell it as a subwoofer, people buy it as a subwoofer. Just sounds a tad derogatory that's all.
Blimey you started something there.
I think you must have had the washing machine running in the background to get them figures.
No disrespect meant to your or your MJ 50.
We have to get real with these figures.
Because your SPL meter is reading a certain output using for exhample a 15hz test tone, that does not mean the subwoofer is in fact producing clean low signals at this level. In fact, I can count on the fingers on one hand how many subs are able to perform at the levels you refer to.
The MJ 50 will be producing a lot of the 2nd harmonic(32hz) 3rd and 4ths. This harmonic distortion will also be there on your SPL meter as yet more output. Also, there is a lot of room gain involved so this would also "boost" your figures as per your SPL meter reading. In short, what you are getting is room boosted, lows with high levels of distortion which equal DB on your SPL meter.
I don't think that I have seen an adverse comment in the forum about the ST range.
For those not able or willing to spend a fortune on a sub I paid £250 for a second hand Storm which is far better than anything available new at that price. When I come to upgrade it I will probably be a later Storm in a wooden finish.
Not if I've got anything to do with it
A sparkling HGS-15 is earmarked for Tamworth
Listening through a decent pair of headphones I can 'just about' hear 16Hz (this may be something else tho) 31Hz is very audible to my ears. The 16Hz tone from the sub was totally inaudible, wouldn't that put rest the theory of harmonics? For me room gain isn't a negative, all that matters is the final output to my ears, I'm sure a pro 50 in a similar sized room would perform as well. As you say what I haven't accounted for is THD.
From your figures here your pro50 wipes the floor with my Velodyne CHT15, even though the velodyne has 300watt amp and a 15" driver and it's enclosure could fit the pro50 in roughly four times over. Looks as if I have bought the wrong sub.
My son has a Kef PSW1000, the spec in relation to the pro50, it has 8" driver, downward firing, 100watt amp, has a larger cabinet, and weighs a little more, so you would expect a little better from the Kef. When I hooked it up while waiting for the Velodyne I heard frequencies that must have been below 25Hz/30Hz but the specs state that 40Hz is the lowest frequency capable from this product, so what was I hearing, boom and distortion, that was evident when I connected the Velodyne up.
More companies need to state truthful figures for their products, not think of a number that sounds good just to sell the product.
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