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  #1  
Old 04-19-2016, 08:48 PM
RVito RVito is offline
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Default IRS Beta Crossover Design

Hello Folks. Since I cannot seem to locate Someone to service the Servo unit I was thinking about internal Crossovers for my Woofer Towers. I could use an External crossover between my Pre and power amp but would I like to use the cast connections between the two. Just a thought, What do you folks think?
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Krell Kct. Evo 505. (2) Fpb 400cx. Infinity IRS Beta, IRS Gamma
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  #2  
Old 04-19-2016, 08:51 PM
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djwhog djwhog is offline
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On woofers you most always are better to go external for a crossover, on large scale woofers the coils can get HUGE, so kinda like a JL or other sub that has it's own amp, they do an external crossover, not a passive type.

Hope that at least steers you right?

Madisound can help talk to Josh about crossovers for anything else, if you PM me I can tell what I have used in the past in this type of application.
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Dave's Cave main Basement system
C500C C500T preamp and a MX150 control center, (3)McIntosh 601 mono block amps, (1)7270 McIntosh amp driving rears in 7.1 (1)Halo A23 amp for side surround, & (1)452 McIntosh amp for main towers part of a bi-amp setup with 601's, Esoteric K-03 JL F212 sub all glued together with mostly all WireWorld & Moon Audio Black Dragon cables.

Headphone Rig
Audeze LCD-X Sennheiser hd 800 & Sennheiser hd 700 cans, Woo Audio WA-6SE with Sophia Princess & matched pair of 6GL7/6EM tubes Black Dragon Cable upgrades on the HD700s!

Streaming Dac Gear
includes K03, high-end custom built Toshiba core i7 16 gigs Wireworld Platinum USB cable, Ipad mini & Itouch driving media center 20 for full remote control anywhere on property and even via web to have music on when I get home Also can remote control MX150 via web too.

Analog Rig
VPI Classic II running with a Dynavector 20X2-H MC Phono Cartridge

Also
For living room and outside rear deck is connected to MX150 with (1)Parasound 5250 amp. Oppo 205 , Sony ES777, (1)PPP, and a DirectStream P15 Power Plant

Speaker system
Builder of custom very high end Dynaudio's 2 Main towers, 1 super tweeter Dynaudio built system above each tower, 4 surrounds all Dynaudio Esoteric drivers 6.5 mids, esoteric dome tweeters, 2 rear surrounds, and a custom 5 speaker 2 7" drivers, 2 3" domes, and a d21 tweeter in the center channel to compliment my 2 300lb custom subs and a JL F212

Misc Build Features
AC Power Electrical overview is 4 20 amp 120 circuits all 10-3 wiring extra shielding with walls custom modded with cross bracing 2x6s over a 14" thick concrete with R19 and weather barrier
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  #3  
Old 04-19-2016, 09:58 PM
cleeds cleeds is offline
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Quote:
Originally Posted by RVito View Post
Hello Folks. Since I cannot seem to locate Someone to service the Servo unit I was thinking about internal Crossovers for my Woofer Towers.
Who have you tried for service? The schematic is pretty widely available, so a competent tech has a good chance of making any needed repair. Bayer Soundworks in Germany offers upgrades to the servo/xover, although I don't have any first-hand experience with them. Millersound also offers service on these, I think. But again, I don't have any first-hand experience with them.

The IRS Beta Infinity woofer system is designed to be used with the IRS servo unit. The woofers lose a lot of performance without the servo control.

Can you tell us about the trouble you're having with the servo/xover?
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  #4  
Old 04-19-2016, 10:04 PM
lwschwartz lwschwartz is offline
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Were you able to get in touch with Greg Schug? Gary posted his contact info here the other day. I know he has repaired servos before. The Beta servo has the circuits in it for the accelerometers on the woofers so you would lose that if you use another crossover. If you don't mind that, any external sub crossover will work. I think Ivan carries the Bryston unit which is quite good.
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  #5  
Old 04-19-2016, 10:10 PM
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GaryProtein GaryProtein is offline
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Larry, you must have radar for these posts! You find them minutes before I do!
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Listening Room: McIntosh C46, MCD500, MR78-Modafferi modified, MPI4, MC602 (2), Accuphase DG58, Pass Labs XVR1 (three-way), tri-amplified Infinity IRS Series V, TailTwister T2X rotator, AtlasSound FMA Rack, dedicated electrical sub-panel, boarded up the fireplace, NO TV!

Living Room: McIntosh C28, MC2300, MEN220, Revox B225, Tascam CD355, Thorens TD125 MKII w/vacuum platter, Rabco SL-8E, Grace F9-Ruby, McIntosh ML-2C (2) & ML-1C (4) stacked, MQ-107, SAE 2800, Nakamichi Dragon, Tandberg 64X, JL Audio f113 (2), NO TV!

System photos: https://www.audioaficionado.org/atta...3&d=1340065567
https://www.audioaficionado.org/atta...2&d=1340065551
https://www.audioaficionado.org/atta...0&d=1502929994
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  #6  
Old 04-19-2016, 10:13 PM
RVito RVito is offline
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Quote:
Originally Posted by lwschwartz View Post
Were you able to get in touch with Greg Schug? Gary posted his contact info here the other day. I know he has repaired servos before. The Beta servo has the circuits in it for the accelerometers on the woofers so you would lose that if you use another crossover. If you don't mind that, any external sub crossover will work. I think Ivan carries the Bryston unit which is quite good.
Yes I did and he does not have the equipment to Calibrate them.
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Krell Kct. Evo 505. (2) Fpb 400cx. Infinity IRS Beta, IRS Gamma
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  #7  
Old 04-19-2016, 10:16 PM
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GaryProtein GaryProtein is offline
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I would try contacting Bill LeGall at Millersound Speaker Refoaming, Speaker Reconing and Repair Services

215-412-7700

He does IRS refurbishment.
__________________
Listening Room: McIntosh C46, MCD500, MR78-Modafferi modified, MPI4, MC602 (2), Accuphase DG58, Pass Labs XVR1 (three-way), tri-amplified Infinity IRS Series V, TailTwister T2X rotator, AtlasSound FMA Rack, dedicated electrical sub-panel, boarded up the fireplace, NO TV!

Living Room: McIntosh C28, MC2300, MEN220, Revox B225, Tascam CD355, Thorens TD125 MKII w/vacuum platter, Rabco SL-8E, Grace F9-Ruby, McIntosh ML-2C (2) & ML-1C (4) stacked, MQ-107, SAE 2800, Nakamichi Dragon, Tandberg 64X, JL Audio f113 (2), NO TV!

System photos: https://www.audioaficionado.org/atta...3&d=1340065567
https://www.audioaficionado.org/atta...2&d=1340065551
https://www.audioaficionado.org/atta...0&d=1502929994
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  #8  
Old 04-19-2016, 11:07 PM
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djwhog djwhog is offline
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http://www.infinity-classics.de/tech...ical_sheet.pdf

Sent from my iPad using A.Aficionado
__________________
Dave's Cave main Basement system
C500C C500T preamp and a MX150 control center, (3)McIntosh 601 mono block amps, (1)7270 McIntosh amp driving rears in 7.1 (1)Halo A23 amp for side surround, & (1)452 McIntosh amp for main towers part of a bi-amp setup with 601's, Esoteric K-03 JL F212 sub all glued together with mostly all WireWorld & Moon Audio Black Dragon cables.

Headphone Rig
Audeze LCD-X Sennheiser hd 800 & Sennheiser hd 700 cans, Woo Audio WA-6SE with Sophia Princess & matched pair of 6GL7/6EM tubes Black Dragon Cable upgrades on the HD700s!

Streaming Dac Gear
includes K03, high-end custom built Toshiba core i7 16 gigs Wireworld Platinum USB cable, Ipad mini & Itouch driving media center 20 for full remote control anywhere on property and even via web to have music on when I get home Also can remote control MX150 via web too.

Analog Rig
VPI Classic II running with a Dynavector 20X2-H MC Phono Cartridge

Also
For living room and outside rear deck is connected to MX150 with (1)Parasound 5250 amp. Oppo 205 , Sony ES777, (1)PPP, and a DirectStream P15 Power Plant

Speaker system
Builder of custom very high end Dynaudio's 2 Main towers, 1 super tweeter Dynaudio built system above each tower, 4 surrounds all Dynaudio Esoteric drivers 6.5 mids, esoteric dome tweeters, 2 rear surrounds, and a custom 5 speaker 2 7" drivers, 2 3" domes, and a d21 tweeter in the center channel to compliment my 2 300lb custom subs and a JL F212

Misc Build Features
AC Power Electrical overview is 4 20 amp 120 circuits all 10-3 wiring extra shielding with walls custom modded with cross bracing 2x6s over a 14" thick concrete with R19 and weather barrier
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  #9  
Old 04-19-2016, 11:50 PM
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djwhog djwhog is offline
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Join Date: Mar 2011
Posts: 6,955
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You probably have this.
http://www.davidsaudio.com/IRS_Beta_Manual.pdf

So from what you describe and the age etc, to me sounds like a leaky cap or caps in the circuit. A good audio/ electrician repair tech should be able to test and find the bad part or parts.

I think I recall back in the day some folks pulled these apart and upgraded most of the caps etc with better grade parts as well. I am sure you have surfed around and I see non on eBay, the agon etc. it would be nice to stay near stock, maybe at least call Madisound maybe they know someone too if they won't offer repairs. I am sure there are folks that fix these, also what about audio classics, they not only sell used gear, they repair as well.

Good luck, it would be a major chore to build a passive crossover, it can be done, I have built many, but in subs it is most times these days cheaper to go active.

Best luck keep us posted

Sent from my iPad using A.Aficionado
__________________
Dave's Cave main Basement system
C500C C500T preamp and a MX150 control center, (3)McIntosh 601 mono block amps, (1)7270 McIntosh amp driving rears in 7.1 (1)Halo A23 amp for side surround, & (1)452 McIntosh amp for main towers part of a bi-amp setup with 601's, Esoteric K-03 JL F212 sub all glued together with mostly all WireWorld & Moon Audio Black Dragon cables.

Headphone Rig
Audeze LCD-X Sennheiser hd 800 & Sennheiser hd 700 cans, Woo Audio WA-6SE with Sophia Princess & matched pair of 6GL7/6EM tubes Black Dragon Cable upgrades on the HD700s!

Streaming Dac Gear
includes K03, high-end custom built Toshiba core i7 16 gigs Wireworld Platinum USB cable, Ipad mini & Itouch driving media center 20 for full remote control anywhere on property and even via web to have music on when I get home Also can remote control MX150 via web too.

Analog Rig
VPI Classic II running with a Dynavector 20X2-H MC Phono Cartridge

Also
For living room and outside rear deck is connected to MX150 with (1)Parasound 5250 amp. Oppo 205 , Sony ES777, (1)PPP, and a DirectStream P15 Power Plant

Speaker system
Builder of custom very high end Dynaudio's 2 Main towers, 1 super tweeter Dynaudio built system above each tower, 4 surrounds all Dynaudio Esoteric drivers 6.5 mids, esoteric dome tweeters, 2 rear surrounds, and a custom 5 speaker 2 7" drivers, 2 3" domes, and a d21 tweeter in the center channel to compliment my 2 300lb custom subs and a JL F212

Misc Build Features
AC Power Electrical overview is 4 20 amp 120 circuits all 10-3 wiring extra shielding with walls custom modded with cross bracing 2x6s over a 14" thick concrete with R19 and weather barrier
Reply With Quote
  #10  
Old 04-20-2016, 09:01 AM
lwschwartz lwschwartz is offline
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Location: Tennessee, Maryland, and Florida
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Quote:
Originally Posted by GaryProtein View Post
Larry, you must have radar for these posts! You find them minutes before I do!
Hi Gary, I am glad that you suggested this forum. It is most helpful for the remaining Infinity aficionados like us.
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