I will be building a My_Ref Fremen edtion LM3886 later when the new boards come in from the current group buy. I will also need a linestage, which I want to DIY, and wondered if something like this will match up decently:
DIY kit 2SK246/J103 FET input PER AMP board Imitation JC 2 Preamplifier Class A Dual differential|jc-2 preamplifier|class a preamplifierclass preamplifier - AliExpress
I thought about a passive but am not sure if that is the way to go, I have read about bass degradation with them but no experience. It would be the simplest to build. I was a licensed repair tech back in the day and can pretty much build anything from a schematic.
I have a Shiit Loki so I don't need tone controls, just 3 inputs, volume control and output.
Any suggestions?
DIY kit 2SK246/J103 FET input PER AMP board Imitation JC 2 Preamplifier Class A Dual differential|jc-2 preamplifier|class a preamplifierclass preamplifier - AliExpress
I thought about a passive but am not sure if that is the way to go, I have read about bass degradation with them but no experience. It would be the simplest to build. I was a licensed repair tech back in the day and can pretty much build anything from a schematic.
I have a Shiit Loki so I don't need tone controls, just 3 inputs, volume control and output.
Any suggestions?
Hm. This is just a suggestion.
As we have discussed it, with the original lm318 chip it is maybe better to have a ~low impedance output pre.
In case the choice of one of the fet-input opamps, presently either ADA4627, or OPA827 or OPA828 - - one can just place an ~50kohm pot directly on the input.
I had used quite a time like that. For me it brought no sound quality penalty, but simplification.
Now I am using direct dac - - amp connection and only software (HQP) volume control. Only for the brave, not recommended!!
Ciao, George
As we have discussed it, with the original lm318 chip it is maybe better to have a ~low impedance output pre.
In case the choice of one of the fet-input opamps, presently either ADA4627, or OPA827 or OPA828 - - one can just place an ~50kohm pot directly on the input.
I had used quite a time like that. For me it brought no sound quality penalty, but simplification.
Now I am using direct dac - - amp connection and only software (HQP) volume control. Only for the brave, not recommended!!
Ciao, George
I have tried the recommendation of Joseph K, for me it doesn't work, so will also look for other variants.
Antti
Antti
I have only used the LM318 opamp versions. Tube did not control it. For some reason the LightSpeed variants, passive and active worked well,
Today I just use DACs with volume controls. One is digital (AKM) the other a PGA4311, Using a MSA6116 also as a gain adjuster.
Today I just use DACs with volume controls. One is digital (AKM) the other a PGA4311, Using a MSA6116 also as a gain adjuster.