washington_highend_audio
Responses from washington_highend_audio
| Shop in Pittsburgh? Want to listen to 845 amp. We have a demo room in Washington, DC area for Sophia Electric amps designed by Richard Wugang. You may make an appointment to listen to Sophia Electric 845 amps after mid August. WA | |
| Sophia Electric 300B Amp You may google "Sophia Electric 91-01 300B amplifier" for answers.Here is a link for one:http://jeffsplace.me/wordpress/?page_id=36I actually use Studer A727 to drive my 91-01 directly. A727 has variable output that can drive Sophia Electric 91-01... | |
| Tube Break-In sound character change Note: EH 2A3 and other popular Russian 2A3 plus the current bigger sized Shuguang 2A3 are all 300B/2.5V by design. Cary amplifier and many other current 2A3 amplifier makers are deisgning the amplifier at much higher plate voltage than a typical R... | |
| SCHEMATIC for Sophia S.E.T. EL-34 amp Dear Autospec:You should send your el34 amplifier to Sophia Electric's service centers for services. The Sophia Electric's services for amplifiers are reasonable and the turn around are quite fast.You cry for no schematics, but at this time, did y... | |
| Mods for Sophia Electric EL34? Change the main power supply capacitors to blackgate 100uf/500V would upgrade the amplifier to another league if you have funds to do it.Look into Sophia Electric's more expensive amplifier would be the next step. | |
| A question for technically astute Worn tubes may cause lower voltage drive. Worn outputs would reduce output power. Try some fresh output tubes to see if you would get more power and headroom.Baby Amp is well design and excuted amplifier. User modification and tube rolling are no ... | |
| better match pre-amp for sophia electric 845 mono Any good sounding pre-amplifiers would match. Buy the one which sound the best to your ears.I have Sophia Electric amps and pre-amps in my showroom. Welcome to listen. | |
| new tubes on auto-bias amp,can be done by anyone? The 6SN7 tubes in your amplifier are in self bias.So, you can tube rolling 6SN7 tubes in your 6SN7 drive 845 amplifier. 845 tube rolling may require to rebias 845 and re-set hum pot--it is the standard procedule for most 845 amplifiers. Many users... | |
| SET--Cary/Sophia 300/845 bassed amps Dear Geroge:Big tubes like 845 and 300B ususally require 24 hours settle in time before all microphonics go away. This is more audible than the break in. Otherwise you get the sound unfocused during the first three hours after moving the big tube ... |