Tekton Double Impacts
You may want to check to be sure the 2A3 will handle 4 ohms. It says 16 or 8 on their site and Eric doesn't like to build 8 ohm versions. He believes all his effort to build efficient speakers goes out the window with that version and if an amp won't handle 4 ohm, you need a different amp. His opinion, not mine. |
Lpretiring, if the specs on the 2A3 amp you would be purchasing correspond to those of the 3.5 watt SET amp described in this Triode Lab datasheet (which is indicated as providing 4 ohm output taps), it can be calculated from the 3.5 watt power capability and the 500 mv specified sensitivity that the gain of the amp to the 4 ohm tap is about 17.5 db. The sensitivity of the Electron is spec’d at 95 db/2.83 volts/1 meter, which given its 4 ohm impedance corresponds to 92 db/1 watt/1 meter. So assuming these specs and those on your existing speakers are reasonably accurate (which is not always the case) you would gain about 5.5 db due to the speaker change and lose about 8.5 db due to the amp change, for a net loss in gain of about 3 db. Not a great deal, which on a typical rotary volume control, viewed as the face of a clock, corresponds to less than 1 hour of rotation. Also, while I haven’t looked into the specs of the Truth, the 100K input impedance that is indicated for the amp on the datasheet I linked to should be a fine match for most and probably almost all passive preamps. Good luck as you proceed. Regards, -- Al |
Hi Bullitt, Your conclusion/speculation regarding the 2A3 Triode Labs amplifier and Double Impact pairing is interesting and the polar opposite of what Teajay achieved in his main/reviewing system ("best combination yet in his system "). Another poster who visited and hear Teajay’s system with this combination said that the sound was fantastic. Their comments were posted earlier in this thread. Charles |
