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SE vs Balanced volume

With my tube amp, when I switch between RCA & XLR, the XLR is louder. With my SS amp, when I switch between RCA & XLR, the volume is the same. The specs for the SS amp state that the amp is fully balanced. Here’s a photo of the innards behind the RCA & XLR inputs of the SS amp. XLR is on the left, RCA on the right, the yellow wires go to the external toggle switch. Why the different results? Thx.
steakster

Showing 1 response by bigkidz

bigkidz
3,311 posts
 
"Some manufacturers use input transformers (that add distortions at low frequencies) while others use instrumentation amps.

True but there are ways to reduce the distortions using input transformers.  Depends on the design.

"As for the use of op-amps - many wonderful amps, preamps and DACs have them, including gear from Jeff Rowland."

True again but that depends on what you consider "wonderful"

Happy Listening.
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