I have run the Absolare 845 amps with Coincident PRE's and ZU Def MKIV. Rated at 94 & 101 db respectively. There was basically no hum with the Coincidents and a slight hum at the speaker with the ZU's. No hum heard at the listening position. Also ran heavily modded Coincident Frank II's with both. The 8 watt Franks were a little quieter but not by much. The extra power, ease, bass and finesse of the 845 tubes are well worth it IMHO.
The 6SN7 tubes used in the Absolare need to be non-microphonic for sure. If you get good 6SN7 tubes, I doubt you will have any noise issues.
Hope this helps.
The 6SN7 tubes used in the Absolare need to be non-microphonic for sure. If you get good 6SN7 tubes, I doubt you will have any noise issues.
Hope this helps.