kilgoretrout5447
New member
I'm working on a Laney GH50L for a client that wants less noise.
There's nothing wrong with the amp, he just wants less noise in an amp that is inherently noisy.
IMO, these just have a somewhat high noise floor. Especially with drive engaged.
I'm going to replace all of the preamp tubes with high performance JJs from tube depot with the low noise/microphonics option.
Replace all of the preamp plate resistors with 3W metal film, and all of the resistors in the drive circuit with the highest wattage that will fit. Maybe the coupling caps, I dunno. I've read that doing the coupling caps works on hum more than hiss, and the result is minimal.
I considered maybe replacing all of the wires going to V1 and V2 from the PCB with shielded coax. Alot of work though, and may do more harm than good. Would swapping the cathode resistors to a higher wattage metal film help?
There's no hum, Just hiss. Would converting it to DC heaters help?
Anybody have any tips, tricks, or advice for taming the hiss?
There's nothing wrong with the amp, he just wants less noise in an amp that is inherently noisy.
IMO, these just have a somewhat high noise floor. Especially with drive engaged.
I'm going to replace all of the preamp tubes with high performance JJs from tube depot with the low noise/microphonics option.
Replace all of the preamp plate resistors with 3W metal film, and all of the resistors in the drive circuit with the highest wattage that will fit. Maybe the coupling caps, I dunno. I've read that doing the coupling caps works on hum more than hiss, and the result is minimal.
I considered maybe replacing all of the wires going to V1 and V2 from the PCB with shielded coax. Alot of work though, and may do more harm than good. Would swapping the cathode resistors to a higher wattage metal film help?
There's no hum, Just hiss. Would converting it to DC heaters help?
Anybody have any tips, tricks, or advice for taming the hiss?