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Paradigm Servo 15a

Discussion in 'Subwoofers' started by Nic Rhodes, Sep 4, 2001.

  1. Nic Rhodes

    Nic Rhodes
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    I have been allowed to post this here by an American audio reviewer called Glenn. There seems to be some interest in this device at the moment that originally DUE to Ramius. It was post on the Tag board originally. The Servo 15a is $1500 in the USA, £500 here. The Velodyne HGS 18 is $3000

    <br />He says:

    I dug up some old measurements since many of you own or are considering these as the bottom end transducer for your setups.

    Here are some numbers we did on an Audio Precision One with B&K lab mic via a Bob Carver designed mic stepup.

    All number were run using the X-30 crossover supplied witht he wal-wart power supply.

    Freq response 21 Hz - 80 +/- .75dB<br />f3 (- 3 dB) 18 Hz

    TH<br />Distortion measurements (nearfield at 100 dB SPL):<br />110 Hz - 0.15%<br />52 Hz - .2%<br />30 Hz - 1%<br />20 Hz - 4.1%

    Headroom: Above 40Hz, 110 dB at least.

    The low frequency extension is comparable to a Velodyne 18 inch sub. Velodyne distortion is lower but does not play as loud. Difference is insignificant on music. Both subs exhibit much lower distortion than conventional subs.

    Given the much higher cost of a Velodyne 18-inch, and the fact that two Servo 15a's will outperform one Velo 18 in maximum output and distortion, it may make sense for those seeking SOTA bass to buy two Servo 15's, which will also give better flexibility in room placement, allow for stereo bass if your system permits, and obtain a better "lock" on the room as Tom Nousaine believes two optimally placed subs can do. The X30 crossover can easily drive two subs, and allows control of phase of one relative to the other.

    It would appear that Velodyne went for lower distortion, Paradigm for higher output capability.

    The 15a appeared about 2 years ago when it was determined that the foam surround material on the original 15 was subject to rapid deterioration under very humid conditions, such as in the tropics without air conditioning (not an issue in the home country of Canada).

    Hope you find this helpful. <br />Posted by: G. from USA

    [ 04-09-2001: Message edited by: Nic Rhodes ]</p>
     
  2. Guest

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    Nic.<br />Are your servo's the "a" version? I can see no distinguishing markings on mine other than Servo 15 and indeed it would appear to be a foam-like coupling material - yet bought brand new very recently.

    SteveEX
     
  3. Rob

    Rob
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    I auditioned the Velodyne 18" unit in my quest for a good sub. The term "portable earthquake" springs to mind. It almost blew me through the wall.The scene at the beginning of back to the future is something like the effect I had. Shocking. I don't think I'll ever get over it. <img src="eek.gif" border="0">

    Should check out the Servo 15 soon. At the price its certainly worth a look.

    Regards Rob.
     
  4. Nic Rhodes

    Nic Rhodes
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    Rob

    I've alwyas wanted to hear a Velodyne 18, where did you hear it? Friends in USA say it it awesome and the best single sub. I've never seen it in the UK.

    Steve

    My two Servo 15a say 15a on the back panel, bottom left of the left hand metal panel. I guess if it doesn't say 15a, it isn't. Doubt there is much difference.
     
  5. Guest

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    Nic.<br /> How right you were sir, mine does indeed say 15a on a rather small stcker (where you said it would be!) presumably covering a pre-embossed servo 15 label.<br />Thanks (i would of most likely gone into "insecurity over-drive" had i found i had an "oldie")

    SteveEX
     
  6. Rob

    Rob
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    Nic,

    The Velodyne was from a friend of mine. He imported it from the states I think for a client of his (he deals in HC and hi fi gear). The guy found it too much, as I did and bought a Mirage BPS400. I guess you would need a large room to get the benefit from the beast. Problem is, over here our rooms are usually considerably smaller than in the US. I was disapointed as I really wanted it, but I valued my home too much! It cracked the ceiling in my HC and caused my previous projector to shut down . Not good. In the end we had it running on pretty much as low a setting as we could and it was still too much <img src="frown.gif" border="0">

    Regards Rob.
     
  7. Guest

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    OOOooo hurt me daddy!
     
  8. Nic Rhodes

    Nic Rhodes
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  9. Guest

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    Nic.<br /> Hand on heart, in no way at all do i under-appreciate the power of &lt;20hz "joy waves" and consider it possibly an addiction.<br />I readily understand your point and wish all to share, but if we are completely honest there are many popular sub's out there that simply don't do it. (i have listened to a few and whilst many are good, the "scary depths" subs are few and far between *read mostly expensive* i stand smartly to your immediate right on any comment you wish to make about the Servo's.)

    [ 06-09-2001: Message edited by: SteveEX ]

    [ 06-09-2001: Message edited by: SteveEX ]

    [ 06-09-2001: Message edited by: SteveEX ]

    [ 06-09-2001: Message edited by: SteveEX ]</p>
     
  10. Nic Rhodes

    Nic Rhodes
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  11. uncle eric

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    As opposed to a "Pair" of Servo-15's, possibly. One on one, not a chance. Or even against the HGS-15 for that matter (which believe you me is only a notch behind the HGS-18.

    We had guests two weeks ago and some were in the dining room having their desert while some were already in my HT room which has 9" thick concrete walls studed out and insulated with one small but solid double glazed window. The room is around 5 metres from the rear of my house where my dining room is.

    I dont have double glazed windows on my house (the main building) and my wife told me afterwards that while I was playing the Titan AE DTS Demo sequence (at reference level :eek:) she looked up to see that the dining room windows of the house were doing stretch excercises. She said she actually saw ripples on the glass window infront of here while she was making coffees. Weird but true :eek:

    My poor DAV loving guests came out of the room and said they thought they had been through ten rounds with Lennox Lewis :D

    Reference level with a HGS is a mind blowing experience. Forget the figures, graphs and talk. Once you've experienced it, you WILL be enlightened.

    Eric
     
  12. john87

    john87
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    My question is after many a long reference level listening session, what happens to your ears, not trying to be a killjoy :D
     
  13. uncle eric

    uncle eric
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    John,
    Pardon :D
    In truth, reference level is very loud and is in fact too loud for most of us. I would say that most people (including myself) usually listen at around the -5 to-12 mark.

    Eric
     
  14. Nic Rhodes

    Nic Rhodes
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    Guys

    don't forget these are not my views but I was allowed to pass on this info by an independent reviewer in the states for general info. At the time the Velodyne was nye on impossible to find in the UK. Almost a year ago now.
     

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