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Plinius SA250 MK IV upgrades? + SA Ref comparison?

I occasionally use this amp to drive PMC's MB2 monitors. Pre-amp and CDP are Bryston. In Class A, its smoothness, bass control, focused soundstage and colours/textures are great; it is 'musical' and easy to listen to. However, it doesn't have the top end extension and clarity of the leaner/'flatter' sounding Bryston 14B-SST2 which normally drives the speakers.

My questions are:

1. Are there any upgrades/tweaks which can materially enhance the SA250 MK IV's top end extension and clarity?

2. If not, has anyone directly compared the 250 MkIV to the twice as pricey SA Ref? I can't audition the SA Ref, so any thoughts are most welcome, thanks.
viajero5000
ngjockey
1,042 posts
 
The rumour is that Plinius lowered the treble down a bit for the SA-102 and 250 MkIV versions because that's the way they interpreted customer demand. For the 103 and SA-Ref, it's back up. Again, just a rumour, read from a review.

Don't know of any factory upgrades but you can ask Plinius.

Try silver blend IC's/ speaker cables. Maybe Nordost. Maybe Ultimate Cables. Hard to go wrong on the latter, for the price.
samoanbowa
8 posts
 
There is possibly an aftermarket modification upgrade that is being offered here in New Zealand however this is still to be confirmed.
inpieces's avatar
inpieces
199 posts
 
I asked Plinius years ago about the old SA VS the new SA series. I asked mainly because i sold my unit due to the background noise. Anyway, it's as Ngjockey says. Later series are more open otherwise it was pretty much same same.
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