I used the Supratek Dual with the Spectron MKII (stereo) and it was a good combination, but when I used the EMM Labs DCC2 directly to the amp I got a sound that was absolutely clean and harmonically very rich. The EMM Labs DCC2 directly to the Spectron is a perfect partner as preamplifier. My speakers are Von Schweikert VR-9SE.
Thank you for question. I put my first feelings about the Joule Electra LA-450ME on http://forum.audiogon.com/cgibin/frr.pl?rprea&1267466541&&&/Joule-Electra-LA-450ME and now I add additional review which will answer to your question even deeply.
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