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I have a wonderful multichannel all-analog system with a Marguiles Audio preamp feeding a quintet of Outlaw 200 monoblocks, whose sound I am in love with. Recently I bought an Audio Research SP6A preamp, similar to the one I used to own. My purpose is to downsize back to stereo preparatory to downsizing my apartment in my old age.Here's the problem: the outlaws have a very low 10K impedance ... too low for the SP-6a's 1k output impediance at 20hz. The result is a sharp bass rolloff which destroys the sound.
I have Thiel 3.5's whose equalizer takes care of this problem, as it goes between preamp and amp and incidentally has a high input impedance and a low output impedance. In effect, it serves as a impedance buffer between the gear while also equalizing the sound for the Thiel 3.5's.
I would like to use the preamp/power amp combo with more conventional speakers. I am loath to give up the monoblocks, although that may be the final requirement. So the question: does anyone here know of a neutral active pass-through buffer that could solve this problem. Or am I stuck buying a tube or ss power amp with at least a 20k input impedance.
Harry
Edits: 09/09/16Follow Ups:
Just a suggestion you may want to look at - I have a Musical Fidelity X-10 v3 tube buffer in my system which has an output impedance of 33 ohms and an input impedance of 470K ohms. Something along those lines might do the trick.
PasDiy.com B1 buffer.
A More sophisticated design than Either your Pre Or Amps ..True!
Try it ? 50$ as a basic Kit.
Hi, theaudiohiffle,
I don't know if the Eastern Electric BBA tube buffer would provide the correct impedance matching but it was designed with that purpose in mind.
I've been using a BBA with my CD/DAC for years and really enjoy the sound and the ability to optimize the signal gain for the amp.
Regards,
Tom
Thanks, Tom. I'll look into it.
Harry
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