2. amps-preamps
  3. 149624-20253

PL EVO Pre - Output transformers!

I am not really in the market, but this caught my eye. According to Herb Rich at Stereophile:
https://www.stereophile.com/content/primaluna-evo-400-preamplifier
this pre uses output transformers, possibly meaning there is no DC blocking capacitor like most tube pres have.

Very interesting! And worth a listen.

Best,
E
erik_squires
imhififan's avatar
imhififan
2,212 posts
 
https://images.squarespace-cdn.com/content/v1/5787c6c82994ca7e8499335c/1551991304272-P0XW46N80HGIEYP...
Those transformers 4 for balanced input and two for balanced output,I think the single ended output still capacitor coupled.
georgehifi's avatar
georgehifi
10,312 posts
 
I rather listen through a "good" cap than an output transformer, and the "best cap" is "no cap". DC coupling with well designed servo's sounds better again, than either cap or transformer.

Cheers George
erik_squires OP
16,388 posts
 
Thanks @imhififan !!
I like the sound of good output transformers, George, and they tend to be less colorful. Just mellow and warm.
imhififan's avatar
imhififan
2,212 posts
 
For balanced/unbalanced conversion in TUBE pre, I prefer transformer than op-amp.
georgehifi's avatar
georgehifi
10,312 posts
 
output transformers George, and they tend to be less colorful. Just mellow and warm.
To me they are bandwidth limited, can ring, have distortion (mellow and warm) and can compress compared to a good cap. DC coupling is way out in front of both.

Cheers George
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