The rated efficiency of the two speakers is very similar. I have had 3.7s for 5 years and I just went to 20.7s. My amps are Bryston 28BSST2s. I of course experience more low end, but in terms of overall volume, it's set the same typically as what I used to have.....Your room is way too small for 20.7s, or even 3.7s for that matter. Surely you jest!!
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[SIGPIC][/SIGPIC]Magnepan 3.7 | Bryston 7BSST2 Mono Amps | Convergent Audio Technologies SL1 Renaissance Preamp w/ Phono | Esoteric K-03 SACD Player | Merrill-Williams REAL101.2 Turntable |Ortofon TA210 Tonearm | Ortofon Cadenza Black Cartridge | Arche' Headshell | Hashimoto HM7 Step Up Transformer | Shunyata Hydra 6 | Cables all Grover Huffman ZX Series
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