I have a pre-owned 3B THX amp bearing serial number 331646. I would like to know if this is the ST series or the NRB series. How old this unit can be? Bryston website has very few information on this unit.
|Originally posted by Andy Lammer
What is the date code on it ?
I believe NRB ceased production by 1996.
I also think the THX is more or less an ST with a trigger.
Of course, you can always call Bryston at 705.742.5325 and probably get the official answer immediately, perhaps even from James Tanner himself. They are very quick to respond, be it for sales inquiries or tech issues.
|Originally posted by Peterhew
the date code is 402. May I know what is the different between 3B-NRB-THX version and the newest ST version in term of sound and the feature(function)?
|Originally posted by AndreYew
"May I know what is the different between 3B-NRB-THX version and the newest ST version in term of sound and the feature(function)?"
First of all, like everyone's been asking you to do, call Bryston to figure out which amp you have.
The ST series are a major technical update of the NRB series by Stuart Taylor (hence the ST name). The two major things done are a change of the gain structure of the circuitry, details of which are found in:
And changes in the physical layout of the amp internals. Both changes improve sound quality by lowering noise and distortion.
Featurewise, it has the same features are the NRB.
|Originally posted by John Kotches
I would suggest discussing this with Bryston. It was my understanding that the NRB amplifers could be upgraded to ST.