I did not know xlr was a must. The Belles is rca with xlr only when used as a mono amp. Need to find another matching Belles amp for use in balanced mode. I did see this Pass Labs amp......It is some 12 years old but a great amp and balanced inputs also......
http://www.usaudiomart.com/details/649340044-pass-labs-x3-150w-x3/
Also, these amps were already mentioned and very good.
http://audioasylumtrader.com/ca/listing/Amplifier-SS/Odyssey-Audio/Stratos-Extreme/Mono-block-power-...
http://www.usaudiomart.com/details/649340044-pass-labs-x3-150w-x3/
Also, these amps were already mentioned and very good.
http://audioasylumtrader.com/ca/listing/Amplifier-SS/Odyssey-Audio/Stratos-Extreme/Mono-block-power-...