Balanced to RCA adaptors

I have tried the Cardas adaptors and the BAT to run from my unbalanced Wyetech Opal pre to balanced Krell FPB 300cx. Both are very good but the BAT's, though more expensive, are better. I think Music Direct sells them.

Neal

this is from the manual of the 33h

Note
Before making balanced connections, remove the U-shaped
shorting-strap between pins 1 and 3 on the Nº33H XLR input
and save it for possible future use. This shorting-strap is
installed when the Nº33H is shipped.
4. single-ended input
Receives unbalanced audio input from a preamplifier with single-
ended outputs. These signals are converted to balanced signals
upon entering the chassis and processed as balanced signals
thereafter. One RCA connector is available.
If the associated preamplifier does not support balanced
connections, connect the RCA output on the preamplifier to
the RCA input on the Nº33H. To reduce the chance of noise at
the (otherwise unterminated) inverting XLR input, insert the
supplied U-shaped shorting strap between pins 1 and 3. (This
shorting strap is installed when the Nº33H is shipped.)

"...Receives unbalanced audio input from a preamplifier with single-ended outputs. These signals are converted to balanced signals upon entering the chassis and processed as balanced signals thereafter."

Most probably, this amplifier uses phase splitter to process unbalanced audio inputs as balanced signal thereafter.

As far as I know, Joule-Electra LA-300/150 single-ended preamps use this technology processing all input single ended signals (RCA) in balanced mode i.e. canceling preamp induced distortions and reducing the noise and before output converting these signals back to single ended in order to exploit RCA outputs.

This is very clever approach allowing these preamps to do balanced processing "on the cheap". Indeed, this is could be one of the explanations of why LA-300 is so quit (more quit then most ss preamp I auditioned) with so much "black background" making music so much more realistic.

Thank you
Rafael

Thanks for all the responsed guys, my Joule Electra Marianne will be arriving next week and I will try the adaptor and see how it all comes together!!