I would like to know the ideal formula for matching an NVA passive preamp as close as possible in terms of selecting the right pot? The general consensus is that for a solid state power amp 10K is generally the right choice (I don't know why however). However I have a Croft 7 power amp which is a va...

Thanks again - useful information

....thanks! And I thought that a passive pre-amp was solely there to provide incremental resistance to the - for example 2V output - of a CD player / DAC. So, 10K, 50K, 100K "so what" - it's stil a 2V output with incremental trimming of the output based on in-line resistors is it not? I'm ...

SteveTheShadow wrote: ↑Mon Jan 27, 2020 4:21 pm

wackyraces wrote: ↑Mon Jan 27, 2020 4:06 pm Why would a manufacturer recommend a 100k passive pot? What's the maths involved in matching a power amp usually?

100K is the usual pot value for a valve amp.

Why, why does a valve amp differ from a SS one in this respect?

savvypaul wrote: ↑Mon Jan 27, 2020 3:56 pm The P50SA is 10k.

We can make a bespoke one with 100k - with the same Seiden switch.

Same price but non-returnable, as it is a one-off.

OK useful thanks. Why would a manufacturer recommend a 100k passive pot? What's the maths involved in matching a power amp usually?

I'm looking to invest in a Decware valve power amp and Steve (from Decware) recommends the use a 100k passive pot. I own an NVA P50sa (mk 1) and not sure of the specification.

Thanks.

What!? That’s minimalism to the extreme! How does your system work like that?

Further thoughts... the best preamp is a passive preamp because there are no active electronics to worry about and neither are there the worries of mains borne interference. Yet even a high quality passive can be improved with better internal connectivity. I only use one source - so I assume if by r...

Yes I wouldn't mind listening to the new P50sa - I'm a little skeptical that I will hear a difference just by upgrading the volume control and internal wiring - or perhaps my systems won't be revealing enough - but that's what loans are for I guess so thank you for that opportunity. Also a listen to...

Just found out I paid £264 for the whole preamp back in April from nenevalleyaudio.

I'm located in Norfolk.