MFA Luminescence MC Reference preamp

MFA Luminescence MC Reference preamp is not an octal base
preamp.

The last of the octals was the Luminescence C, which was built in Dec. 1990.

MFA Luminescence MC Reference used 6DJ8/6922 tubes. I never
heard this model, but I think it was review in TAS.

I owned three different models of the octal Lumincence including the three chassis Venusian.

Phono section uses 4-5691; 2-6EM7 for 44 db of gain.
Line section uses 2-6SN7(5692); 2-6DN7 for 28 db of gain.

If you're look for an octal Luminescence, try to find a
two chassis version with a tube regulated power supply.

If you're into LPs, the octal Luminescence is highly recommend for it's superior focus,air and spatial qualities. No nine pin triode based preamp, I've heard
comes close.

Ecclectique- it shouldn't be surprising that the Syrah using 6SN7s in a transformer coupled line stage is less demanding on tube quality. The 6SN7 has less gain than
6SL7/5691 used in the phono section of the Lumi.

The best tubes I found for the Luminescence phone/line sections were the brown base RCA 5691/5692s.

Good luck with your Koetsu