Besides MNichael Percy, who has recently moved and is VERY busy, try Arn Roatcap at www.goldpt.com. Email your question and I bet you'll get a useful answer. My guess is that your additional resistor idea isn't good. It may also be relevant that I've used 10K ohm ladder type passives with Pass Aleph 3 amps, whose input impedance is only 23K ohms. That 10X figure would be nice to have, but isn't necessary.
Passive Preamp Project vol. II
I've opened that topic before so that's why it's vol II since I have a few more questions to discuss.
Would that help if there will be a resistor or selectable resistor bank added to output of attenuator to bring the input impedance of the power amplifier to at least 10x level? Will that solve the problem of attenuation bandwidth that is not realy usable with low impedance poweramps (bellow 30k)?
If you know any links or literature please, advise.
Would that help if there will be a resistor or selectable resistor bank added to output of attenuator to bring the input impedance of the power amplifier to at least 10x level? Will that solve the problem of attenuation bandwidth that is not realy usable with low impedance poweramps (bellow 30k)?
If you know any links or literature please, advise.
4 responses Add your response