roberjerman

Responses from roberjerman

Can I make my stereo play mono by...
Buy a preamp with a mono function switch, if you don't have one already! 
Can I make my stereo play mono by...
Only two-channel tube amps can be parallel-connected! This will give double the power for mono use. Never parallel the outputs of a two-channel transistor amp! Some of these amps have internal bridging circuits that will allow conversion to mono s... 
Can I make my stereo play mono by...
I find that using a pair of speakers this way for mono is much better than a single speaker. 
Can I make my stereo play mono by...
Leave your pair of speakers in their normal location. Use the "mono" function on your preamp (if it has one). You will have a nicely centered mono image between the pair of speakers! Leave the amp connected as usual for stereo. 
What is a non-active pre-amp stage?? Are their advantages to this design??
Just a single dual-ganged pot or a pair of pots (variable rotary resistors). No gain, no noise! 
Tube DAC without output transformer?
A tube cathode follower does not require an output tranny and has sufficiently low impedance to drive a cable. 
Integrated tube amp under $1000 / $2000
PrimaLuna tube gear is an excellent value for the cost, unlike say, Audio Research! 
Best speakers 5k 10 k
Ohm Walsh's! 
NOS tubes got bent in Ming-Da MC-7R preamp
Stick the original Chinese tubes back in and warn interested buyers of the problems!  
Why Do Schumann Resonators Work?
Have you seen the Saucers? 
Why Do Schumann Resonators Work?
And a room painted pink will further enhance a mood of calmness, allowing the echt sense of musical "flow" to blossom more fully! 
Tube amp forethought
@bdp24  +1 Sounds good! 
Tube amp forethought
If you are still insistent on a tube amp, the Dynaco ST 70 (either vintage or new) is a good match for the 57's. 
Tube amp forethought
@jperry +1 - I used a Bedini 25/25 with my Quad 57's for years. The only tube amps I found comparable were the Futterman OTL's (I still have 3). An alternative choice would be a nicely restored Quad 303. The 57's are voltage-limited. They will be ... 
Why Do Schumann Resonators Work?
Buy two, lay down and attach them to opposite sides of head. Turn on and experience cosmic bliss!