Bubo Posted February 11, 2023 Share Posted February 11, 2023 Beautiful and thoughtful restoration. Why not have a prototype house build out 100 pre-amp boards and 200 amp replacement boards and a standard BOM using what you learned? I've often wondered why Mc doesn't do this as a restoration service....... Always a marketing guy........ Quote Link to comment Share on other sites More sharing options...
John Warren Posted February 12, 2023 Author Share Posted February 12, 2023 21 hours ago, Bubo said: Beautiful and thoughtful restoration. Why not have a prototype house build out 100 pre-amp boards and 200 amp replacement boards and a standard BOM using what you learned? I've often wondered why Mc doesn't do this as a restoration service....... Always a marketing guy........ Good question. The solid-state amps today are vastly more complex than the first-generation units. Their business model is primarily selling new, solid-state amps. Having a revised solid-state design (a few op-amps and tweaks) that's basically 50+ years old sound as good as the hardware they make today would be a marketing nightmare. The "sweet sound" of a hand-full of transistors vs. 2000+ transistors is said by no one. It would be problematic, contradictory. And thank you! Quote Link to comment Share on other sites More sharing options...
Klipschguy Posted February 23, 2023 Share Posted February 23, 2023 Very nice work, John - top shelf. Quote Link to comment Share on other sites More sharing options...
jwc Posted April 24 Share Posted April 24 Hey. I've heard and seen the beautiful MC2100s rebuilt by JW..... their Mark1101. Some time ago, I had my MC250s reworked. Quiet and clean. They shine in this new setup in a little room. https://northreadingengcom.ipage.com/forum/index.php?topic=3.0 2 Quote Link to comment Share on other sites More sharing options...
jwc Posted April 24 Share Posted April 24 This product I've used in more than one system and I own 2 of them. I feel it doesn't degrade the sound. Makes those vintage amps dead quiet when hooked to a pro active XO. JW may not approve...but it helps me. The bottom MC250 is all RCA from the Mac preamp to the Heresys. The top one I have the Jenson to use that with dbx and MC250 amp for the Klipsch horns. Quiet as a mouse. 2 Quote Link to comment Share on other sites More sharing options...
mikebse2a3 Posted April 25 Share Posted April 25 5 hours ago, jwc said: This product I've used in more than one system and I own 2 of them. I feel it doesn't degrade the sound. Makes those vintage amps dead quiet when hooked to a pro active XO. JW may not approve...but it helps me. The bottom MC250 is all RCA from the Mac preamp to the Heresys. The top one I have the Jenson to use that with dbx and MC250 amp for the Klipsch horns. Quiet as a mouse. I agree with JC and highly recommend the Jensen ISO-MAX units and use them in my systems. FYI …. Jensen recommends the use of their PI (Input Transformer designs) whenever you have the option over their PO (Output Transformer designs). The Pl-2XX with input type transforms will give better performance than the PO-2XX unless you absolutely need to run an output transformer type. Some info for anyone interested… 1 Quote Link to comment Share on other sites More sharing options...
mikebse2a3 Posted April 25 Share Posted April 25 JC… I really like the small speaker system with the K510…!!! What driver are you using on the K510..? Quote Link to comment Share on other sites More sharing options...
jwc Posted April 25 Share Posted April 25 I edited my post above and changed out the image. I had the wrong transformer model on there. Mike, it is the stock Klipsch K-691. XO is DBX Venu360 10" B&C in a custom box ported about 70 Hz https://www.bcspeakers.com/en/products/lf-driver/10-0/8/10nw76-8 Subs are lab 12s in sealed box 5 Quote Link to comment Share on other sites More sharing options...
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