Can I Live With A Hardwood Floor?

folk freak, thanks for the link. Yes, I've seem seen some things on eBay and Craig's List, so I will buy something eventually. Right now I've placed a cotton throw with wool fabric on top of that and a German wool military blanket on the floor and that helps considerably.
Aside from that, I'll talk to Akiko Audio about their speaker tuning chips as well as some of their other products. Occasionally, I'm getting a little shrill in he upper midrange.

if you have a line problem then go straight to an isolation transformer; buy used on ebay or somewhere else & you may need an electrician to wire it in

PS Audio will be glad to sell you one for 3x to 4x more and it will look nicer...

randy, won't an isolation transformer strip away some frequencies? I tried one many years ago and it didn't sound right. I remember that it was hospital grade.

I too have 2905’s. My floor is granite. A few thoughts.

Anything you can do to make the walls, floors, or ceiling a bit rough is helpful. I use a large Persian carpet on one wall, and 12" x 24" rectangular patterns of 1" wood trim on the ceiling.

Equally useful are non-parallel surfaces. You might be able to do something with your ceiling to make it non-parallel to the floor, like a peak in the middle.

Consider your floor; make sure it is as stable as possible. Re-inforcing may be costly, but it is something to consider.

I would absolutely forget about trying to tweek the Quads with power stuff. They use so little current, and anyway the RC time constant is so large, that it can’t make any difference. Further, I tested this theory with high class isolation transformers, and they made no difference whatsoever to the Quads. Big difference to amps, pre, and phono, but nothing to the Quads. Save your money for a better source, or better electronics, or a decent Burgundy.

If you want to improve the Quads, you will have to replace the step-up transformers or replace components in the signal path, like that ugly cap and resistor. Not recommended for a DIY, though - Quads can kill you in two ways. Get a tech to do it. Beware!

Good luck.

If you seriously want to improve the Quads, find a good tech who is experienced with high voltage equipment. Get him to install better step-ups (I use Plitron , based on a Vanderveen design), and replace the ugly resistor at the input of the circuit board. Don't do it yourself.

But you can get more bang for the buck in electronics, or isolating your electronics, or with an ultrasonic record cleaner. Experience talking.