Dared MC-7P optimal tubes

Phil, usually the feedback resistor is the one connected between preamp output and the first line stage tube cathode.
Do not go overboard with feedback, it will kill soundstaging and transient response.

A good tweak to reduce gain that also improves sound quality is to remove any cathode bypass caps in the line stage.

To get rid of ringing (actually RF oscillation), install 300 ohms to 1 K ohms (not critical value) carbon composition resistors in series with each tube grid. Allen Bradley brand is one of the best for this application, available from Parts Connexion for the whopping price of 0.30 each!
These are called grid stopper resistors and MUST be installed very close to the tube grid socket pin. Cut the resistor lead to be soldered to the tube socket no longer than 3/16 " (or 4.5 mm for the rest of the world).
This tweak will damp only HF oscillation and will NOT harm audio performance, unless you overdo the resistor value (1K is the safe upper limit, 300 or 470 ohms should do it).
Also, scope the power supply output to make sure it is not ringing and has no rectifier spikes.
Good luck

Can anyone tell me what the output impedence is of this Dared preamp?

I also looked all over the place for this info as I want to use both outputs to drive two amps for bi-amping. I sent an email and received this response:
"the output impedance is very low, I think at 100 Ohm range, so it works well with any type of amps.

thanks

Joe"

I just got a used MC-7P yesterday, it sounds very promising. Has anyone replaced those yellow 0.1 caps with something nice? If so how did it sound after?

I have started a thread at DIY Audio to see what others have done to upgrade this nice little preamp- if you have done anything with to mod yours please post it here:
http://www.diyaudio.com/forums/tubes-valves/205056-dared-mc-7p-upgrades.html#post2873405