Ohm Walsh Micro Talls: who's actually heard 'em?

Here's an interesting thread on the impedance matching issue:

http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1227661419&openflup&12&4#12

The consensus here seems to be a 10:1 amp input/pre-amp out ratio is a good target. Also that actual output impedances of pre-amps is higher at lower frequencies with can negatively impact bass response.

So for example, my case, with the ARC sp16 premap output impedance being 20K ohm, I would want an amp in the 200K input impedance range (my A3CR is only 31K).

Also, interconnects factor into the equation in regards to impedance loads presented to the pre-amp, so things get mor complicated again here.

Of the SS amps I've considered, the newer Bel Canto Ref1000m would be the best choice for me apparently, but pricey. I'll be looking to find some other options and will not rule out tube amps necessarily either.

11-06-09: Mapman
Have you found the better clarity and control extends into the upper frequency ranges as well?

Any downsides that you can identify to go along with the benefits?

Yes, but it depends on the components, and the difference is more subtle than it is in the bass region.

No downsides to better impedance matching.

is it the absolute value of the preamp output impedance, or the ratio or magnitude of amp input impedance to pre-amp output impedance in the end that matters?
Mapman (System | Reviews | Threads | Answers)

The manufacturer's stated specs are a starting point, but impedance output and input varies across the frequency spectrum, and sometimes greatly beyond the nominal spec. This is why reading the Stereophile test measurements can be valuable. Atkinson addresses the impedance measurements across the frequency spectrum, and bases his matching recommendations on what he discovers.

Hi Rebbe and to all in the best thread at the 'Gon.

RE JUICY:
This was posted on their site today:

"Time to turn out the lights...

It has been a great 5 years, but it is time for me to retire. I will no longer be building any new production batches of the BlueBerry, Peach, Tercel or pCAT. I WILL however, be completely supporting all customers (in and out of warranty) with their repair, upgrade and modification needs.

The web site will be here for ahwile (as reference), but I am removing the PayPal purchase buttons.

If you have any questions about your product, just send me an e-mail."