Author Topic: servo controlled subwoofers vs conventional subwoofers  (Read 769 times)

Offline Nick B

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servo controlled subwoofers vs conventional subwoofers
« on: July 19, 2018, 01:26:07 AM »
In another thread, Iíve received lots of information and recommendations regarding subwoofers. As I played some particular music tonight, it was quite obvious that a sub or subs would have benefited the sound tremendously.  The LS 50s were glorious tonight, especially with the help of the newly added Icepower amp..thanks TomS...and the Border Patrol SE dac...thanks Emil. Based on what Iíve read and whatís been recommended here, I certainly lean towards the smallest, but still very heavy, Rythmik L12. Next choice would be the SVS SB 1000. Danny Ritchieís subs arenít being considered...theyíre just too big and heavy.

What I donít have is an exact grasp on is what are the differences that Iím likely going to hear going servo vs using a conventional sub. Is more information going to be presented? Will it be more accurate as to the attack and decay of notes? Will it sound a bit more organic? (I hope)
Some of you have heard servo subs at shows, dealers or friends homes or even have them in your homes. Is it worth the pita of moving a 58 lb sub with a hand cart and being extra careful so I donít screw up my back? What are you hearing that makes you like a servo sub so much? If the differences are small/very small, then it may not be worth it to me.
I should mention that very likely I would be putting the LS 50s on the subs.
Nick
ICEpower 1200as2 stereo amp
Audio Hungary APR 204 preamp
KEF LS 50 speakers
Border Patrol SE dac
Auralic Aries Mini
Roon & Tidal
Don Sachs phono
Basis Ovation turntable
Graham 1.5 T tonearm
AT-ML150 cartridge
PI Audio Uber
All cables by Gary A

Offline S Clark

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Re: servo controlled subwoofers vs conventional subwoofers
« Reply #1 on: July 19, 2018, 06:00:47 AM »
Servos are fast.  Therefore they are articulate and detailed.  I remember the first time I heard them at Danny's I told him it was the first time I'd hear the bottom dozen notes of a concert grand that actually sounded like a concert grand. Specifically, they have the attack, reproduce the decay, and include the resonance of the piano body.  The other way to do that is with dozens of smaller woofers each loafing along so that they have a quick recovery (big line source speakers).
Danny has now moved all his efforts into open baffle.  But in a sealed box, they don't take up a lot of real estate, but still deliver 95% of the goods. 
Ive build several subs, some ok, some pretty darn good.  I've replaced them with servos.  A friend has the LS-50's.  We set them up in my room, and they clearly benefited from a sub. 
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Offline djdube525

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Re: servo controlled subwoofers vs conventional subwoofers
« Reply #2 on: July 19, 2018, 11:55:34 AM »
Granted... a little bit of a price difference from the Rythmik, but was wondering if anyone has heard Mark Seaton's new, smaller 12" sub.

http://seatonsound.net/product/js-12-subwoofer/

Offline Nick B

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Re: servo controlled subwoofers vs conventional subwoofers
« Reply #3 on: July 19, 2018, 02:08:04 PM »
Granted... a little bit of a price difference from the Rythmik, but was wondering if anyone has heard Mark Seaton's new, smaller 12" sub.

http://seatonsound.net/product/js-12-subwoofer/

As Iíve been researching subs quite a bit, I did become aware of the Seatons and they have a very good reputation. Hopefully someone has heard them.
ICEpower 1200as2 stereo amp
Audio Hungary APR 204 preamp
KEF LS 50 speakers
Border Patrol SE dac
Auralic Aries Mini
Roon & Tidal
Don Sachs phono
Basis Ovation turntable
Graham 1.5 T tonearm
AT-ML150 cartridge
PI Audio Uber
All cables by Gary A

Offline Folsom

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Re: servo controlled subwoofers vs conventional subwoofers
« Reply #4 on: July 19, 2018, 03:56:30 PM »
Servo's are great, and better modified by me.

However Anand on AA swears the Funk's blow the stock servo's from GR away. I believe him. Modified? I don't know. But we are talking about a minimal $5k difference I think. One problem however is the Funk may not be able to articulate high enough to gross with speakers to make it fullrange.

Offline Nick B

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Re: servo controlled subwoofers vs conventional subwoofers
« Reply #5 on: July 19, 2018, 05:02:07 PM »
Servo's are great, and better modified by me.

However Anand on AA swears the Funk's blow the stock servo's from GR away. I believe him. Modified? I don't know. But we are talking about a minimal $5k difference I think. One problem however is the Funk may not be able to articulate high enough to gross with speakers to make it fullrange.

I respect Anandís opinions and yours as well. Iíve emailed him a couple of times with questions and heís always responded. He is familiar with a lot of equipment. I took a look at the Funk site and the pricing is too high for me. Looks like superb quality though.  I got good prices on the Ice amp and LS 50s. I try to be a budget conscious audiophile. 
Iím curious how youíd mod a servo and if you can describe that without giving away your specific secrets, great and what do you charge?
« Last Edit: July 19, 2018, 05:08:00 PM by Nick B »
ICEpower 1200as2 stereo amp
Audio Hungary APR 204 preamp
KEF LS 50 speakers
Border Patrol SE dac
Auralic Aries Mini
Roon & Tidal
Don Sachs phono
Basis Ovation turntable
Graham 1.5 T tonearm
AT-ML150 cartridge
PI Audio Uber
All cables by Gary A

Offline AJ Soundfield

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Re: servo controlled subwoofers vs conventional subwoofers
« Reply #6 on: July 20, 2018, 03:33:57 AM »
However Anand on AA swears the Funk's blow the stock servo's from GR away. I believe him.
The GRs are open baffle dipoles, the monopole Funks are not. There is no valid comparison taking place with AA Anands vision. They should sound different. Maybe just his personal preference, who knows.
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