XLR to RCA conversion


I have learned that my Manley monoblocks perform better using a single-ended input, rather than the balanced cable I am using.

If I were to buy the Cardas converters that would enable me to convert the XLR to an RCA at the amp end, would I (1) have to do the same at the Audio Aero Capitole output end or could I just convert the input or amp end of the connection?

I have to use my 40 foot balanced interconnects and want to go single-ended at the amps and HOPEFULLY still get the benefit of a balanced cable and the noise rejection it provides.

Thanks in advance for your help.
128x128gerryn
Well I have a balanced Placette linestage which I can choose to have single ended inputs installed. So I'm deciding whether to get that modification or simply get a RCA to XLR cable.
I added a pair of Cardas single-ended adapters to the amp end of the interconnects and all I get is a buzzing sound thru my speakers. I turned everything else off in the room and still get the same buzzzzzzzzzz.

Maybe it's because I didn't put the same adapters on the source end of my interconnects?

Any input will be appreciated. thanks
I've eliminated the ground loop hum and the change to single-ended at the amp end is remarkable. Much better soundstage and slamm. In addition, I was surprised to see that I got greater GAIN by using the single-ended amp connections at the amp end. This is exactly the opposite of what I expected since XLR's normally provide a 6dB gain. I plan to call Manley and discuss, but if you're a Manley owner, you must use single-ended at the amp end to get the full potential of these fine amps.

Comments?