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Transformer coupled outputs/inputs in preamplifiers.

I have been a big fan of VAC preamplifiers, both for their musicality and their ability to optimally mate with all solid state and tube amplifiers I’ve owned. I believe this is strongly related to use of transformer coupling at output and input. Are there many any other tube preamplifier companies that use transformer coupled outputs (+/- input transformers). I am aware of the SE preamplifiers recently from BAT with transformer coupled outputs and a recent offering from Prima Luna, I believe. Any thoughts on these preamplifiers or others. Yes, I am aware that transformer coupling has its strengths and weaknesses, but I am convinced (after 15 years using VAC preamplifiers) that output transformers are generally the answer for compatibility issues. Thanks so much for all your kind input.
audiobrian
erik_squires
15,945 posts
 
+1 to the OP, I'm kind of a fan!! :)

I like expensive caps, but there's something quite different about transformer coupled inputs/outputs.

I don't know how many realize that if you listen to a vintage recording, you are probably listening to the end result of quite a few of them.
larryi
3,785 posts
 
My custom-made linestage has input transformers and output transformers.  In my case, the output transformers are kind of necessary because my amp has complementary input transformers and does not play well with all linestages.

bigkidz
3,330 posts
 
Why limit yourself there?  Choke loaded preamps, preamps without capacitors in the signal path. etc. DHT deisgns, etc.

 
three_easy_payments's avatar
three_easy_payments
2,097 posts
 
I didn't even think about this being a factor in why my VAC preamp pairs so well with my Pass amp.  I had attributed much of the synergy to the impedance match primarily but this makes a lot of sense.
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