Originally Posted by jakebake
So I upgraded from my fiio e9 to a used glow audio amp one. Just got it today and so far I am very impressed. Much more detailed and better bass. Vocals are a lot more upfront as well. Not sure why I have seen so many for sale threads from the same users who were raving about this amp in the past. Anyways, right now I am using it with my akg q701's.
This is the 09 version so it does say not to use european tubes. Anyone familiar with this amp or know some great chinese or russian tubes for this I can try?
Uses two el84 and not sure what the other two tubes are. Also which of these will make the most difference when changing? I'd like tubes that do sound warm but will bring out the most detail possible. As of right now this amp has pretty much the perfect amount of bass for me.
Hi, I play with tubes and tube amps so I can give you some help here.
The link says that your amp uses
2x EL84 - "
*POWER TUBE INFO: European EL84s differ in design from their Chinese, Russian and American counterparts in one important respect: On all European manufactured EL84s, pins 1 and 2 are connected together inside the tube envelope. Chinese, Russian (and most American) EL84s do not internally link the pins 1 and 2 (with the exception of the Russian remake of the Genalex Gold Lion). This poses no problem for the Amp One Ver. 0.8 (2008) and Ver. 1.1 (2011) amplifiers. They are compatible with any EL84 or 6P14 valve. However, due to a particular circuit design utilized on those amplifiers, the Amp One Ver. 0.9/1.0 (2009/10) amplifiers are not compatible with the European tubes. When a European manufactured EL84 is plugged into the '09/10 GLOW amp, the additional connection within the tube envelope in the European design is likely to cause premature failure of the tube, and possible damage to your amplifier. This limitation applies only to the 2009/10 model.
You can refer to the following link on EL84s.
BTW, Brent Jesse is a very reliable tube seller.
2x 6N3 :- You can select any of the tubes listed here :-
You can get order 6N3s or 5670/2C51s from Brent Jesse too.