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Plinus SB301 310 Watt Power Amplifier
The PLINIUS SB-301 is our answer to the perennial power versus sonic quality debate. We were approached about 12 months ago by a Californian company engaged in the manufacture of large home theatre speaker systems, and asked to submit an amplifier for their appraisal.
There were two important specifications that had to be adhered to, a)the amplifier had to sound good,and b)the amplifier had to sound good at 120dB! We sent them an SA-102 and goal one was achieved. The sound quality was better than anything experienced previously, however under rigorous testing they found that the SA-102 would only deliver 115dB prior to clipping.
We then sent an SA-250/4. Goal a and b were surpassed but the SA-250/4 is very large and a little too expensive for the multi-amplifier applications they had in mind. Back to square one and some head scratching. Our design team decided that we needed a 300 watt, SA-102 package and this is exactly what the SB-301 is. The basic circuit topology is the same as the SA-102 but with a larger power supply and more rugged output stage. The number of output devices is double that of the SA-102 and the two toroidal transformers are larger