Author Topic: Biamp SM/23 active Crossover - Before  (Read 1778 times)

Offline OldiesButGoodies

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Biamp SM/23 active Crossover - Before
« on: February 09, 2014, 06:24:29 PM »
Some "before" pics of the SM-23 I am rebuilding.  Nick recommended this x-over as a good choice from his experience w the VMPSs.  $30 on ebay,  but in terrible shape.  Still,  with all its ugliness it sounded pretty darn good,  so I am rebuilding it.  New caps, repainting the case,  new knobs, and perhaps new op amps (this last one may not come to be as I think the ones in there already are pretty good).  Will post "after" pics later.














« Last Edit: February 16, 2014, 10:07:38 PM by Recapp'nTap​eDeek »

Spkr: VMPS RM40
Pre: McCormack RLD-1, Rotel 970BX Phono
Amps: Channel Islands Audio D-200 MkII 
Phono: VPI Aries 1,  Van de Hul Frog
CD: Oppo BDP-83 DAC: Young DSD DAC
Cass: Tascam 122MkII
R2R: Revox B77
Sub: Rhythmik FV 15HP

Offline OldiesButGoodies

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Re: Biamp SM/23 active Crossover - Before/After
« Reply #1 on: February 16, 2014, 07:18:37 PM »
Just finished recapping the SM-23 with gorditas Dayton Audio caps.  Making them fit was a bit of a shore,  but the point was to have a blast doing it and that I did.  New power cord and control knobs, cleaned pots and I am set to go.  Will compare it against the Peavey after burn in.  Sounds good so far.   ;D











The Infinitys are off maintenance and back on duty:   



The Mexican Recapper
« Last Edit: February 16, 2014, 07:28:53 PM by Recapp'nTap​eDeek »

Spkr: VMPS RM40
Pre: McCormack RLD-1, Rotel 970BX Phono
Amps: Channel Islands Audio D-200 MkII 
Phono: VPI Aries 1,  Van de Hul Frog
CD: Oppo BDP-83 DAC: Young DSD DAC
Cass: Tascam 122MkII
R2R: Revox B77
Sub: Rhythmik FV 15HP

Offline MacGeek

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Re: Biamp SM/23 active Crossover - Before
« Reply #2 on: February 16, 2014, 07:42:38 PM »
Looks like you moved the Infinitys closer to the rear wall.
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Offline Sir Thrift-a-Lot

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Re: Biamp SM/23 active Crossover - Before
« Reply #3 on: February 16, 2014, 10:28:52 PM »
The xover looks good.   I have a whole bag of knobs I pulled from an old Peavey board a friend was trashing.   I would have given you what you needed in my last care package had I known.

Offline OldiesButGoodies

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Re: Biamp SM/23 active Crossover - Before
« Reply #4 on: February 17, 2014, 09:36:36 AM »
The knobs I bought are ok but not ideal.  Set by a hex screw vs. striated,  and [more irritating] the skirt does not get down far enough (close to the face plate) to look original.  Can I pop by and steal a few knobs from ya?  I am off today. 

THANKS!

Spkr: VMPS RM40
Pre: McCormack RLD-1, Rotel 970BX Phono
Amps: Channel Islands Audio D-200 MkII 
Phono: VPI Aries 1,  Van de Hul Frog
CD: Oppo BDP-83 DAC: Young DSD DAC
Cass: Tascam 122MkII
R2R: Revox B77
Sub: Rhythmik FV 15HP

Offline Jim Pittsburgh

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Re: Biamp SM/23 active Crossover - Before
« Reply #5 on: February 17, 2014, 10:20:08 AM »
very nice....  I'm sure that the new speaker positions give a more integrated sound too.

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Offline Reticuli

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Re: Biamp SM/23 active Crossover - Before
« Reply #6 on: December 28, 2017, 04:46:49 PM »
What would you say was the benefit sonically of recapping the SM 23?

Offline OldiesButGoodies

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Re: Biamp SM/23 active Crossover - Before
« Reply #7 on: December 28, 2017, 09:59:04 PM »
What would you say was the benefit sonically of recapping the SM 23?

Apologies for the pictures not showing - the hosting vendor is holding them hostage unless I pay some ridiculous fee they never disclosed before offering me a free version. 

The benefits of recapping are little to none if your SM23 has working caps and you intend to replace them with normal caps.  However,  if you recap it with better film caps in the signal path, it really makes a difference, especially after some burn-in time.   In my case, more defined tighter bass and better separation of instruments.  Noise floor lowered a bit as well. 

I imagine one could continue the upgrade craze in many ways but had I kept mine the next step would have been better pots- Alps or something like that - to replace the stock cheapies.   

OBG

Spkr: VMPS RM40
Pre: McCormack RLD-1, Rotel 970BX Phono
Amps: Channel Islands Audio D-200 MkII 
Phono: VPI Aries 1,  Van de Hul Frog
CD: Oppo BDP-83 DAC: Young DSD DAC
Cass: Tascam 122MkII
R2R: Revox B77
Sub: Rhythmik FV 15HP

 

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