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Opinions on Graaf Amps

Does anybody have any expereince with Graaf OTL amps? I'm especially interested in the little GM 20 but don't have a chance to listen to it where I live. Has anybody heard it? In my search for a new amp I have listened to the Carys (572s) and found them overall too bloomy. I don't like tube amps that try to sound like solid state (i.e., Audio Research or BAT) but I also don't want the tubes to color the sound too much. I've tried the Atma-Sphere S 30 which sounded terrific in my system, open, airy and very musical, but it just runs too hot. So now I am considering the Graaf or perhaps an Air Tight. Any thoughts would be appreciated.

My system:

Joule Electra LA 100 MK-III
Merlin VSM + BAM
Audiomeca Keops as transport and Audio Logic 2400 DAC
JPS Super + speaker cables, FX interconnects, and Power Cords

Many thanks,

Dr V
drv
freshpuma
45 posts
 
Ken1967,

You are correct, most amps dont. The problem with the GM-20 is the heat from the tubes gets the caps very hot, and so the caps don't last that long.

Theo
mirtysan
4 posts
 
Hi , I have 2 Graaf Gm 20 used in biamp ( two stero amp one for the bass and one for the tweeter ) with a Graaf 13,5 bII and a Graaf Gm 70 phone stage.
I owned first only one Gm 20 with the same pre and i was absolutely wondered for the fastastc sound. With two Gm 20 the sound became amazing: detailed, terrific. Try it if you can, buy one and keep it .
ken1967
24 posts
 
Hello,

Can anyone tell me if Graaf GM 13.5b can tape to 220v from 120v internally ? Anyone have schematic or manual of dong this?. Please help. Many thanks

Regards
Ken
samhar
1,048 posts
 
8 years this this has been going!!! Drv what did you do???
pani
1,219 posts
 
Which Graaf amplifier can drive an ATC SCM40 in a medium sized room ?
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