View Full Version : Sonic Frontiers SFS-40

stephane RAME
12-30-2008, 01:25 PM
For my system: http://audioheritage.org/vbulletin/showthread.php?t=11750
I just bought a second amplifier (the first is a Lectron JH50 equipped EL34) a Sonic Frontiers SFS-40 which is currently equipped KT88, but it can be equipped with the following references EL34/6CA7/6550/KT88/KT90/KT99a, your opinions and experiences on the best choice?
Thank you.

01-02-2009, 11:13 AM
Those SF units are So sweet Stefan....As for tube selection I am not sure what to tell you. I used to do warranty work for SF/Anthem and I must say two things:

1. It is the nicest most beautifully hand made tube stuff I have seen to date.

2. I would have starved to death if I had to live off warranty repairs on these two product lines.

stephane RAME
01-02-2009, 09:20 PM
Thank you for your opinion on this amp, I attached a copy of the operating manual.
Thank you.

01-07-2009, 03:12 PM
Nice amps

I have 2 mono rogue tube amplifier using also Kt88 for the high on my bi-amp system .
It can use also kt66 /el34 etc.... if adjusting the Bias but never had time to test it .

if you do , please send you different impressions , I would be very iterested in !:barf:


stephane RAME
01-09-2009, 06:39 AM
Lectron JH50 - push-pull EL34
Sonics Frontiers SFS-40 -push-pull KT88