Power Modules Inc. Belles Reference 150A v2 Stereo Power Amplifier: $2,295 US Retail. David Belles’s power amplifiers are well known for delivering a great balance of detail, tone, and musicality and the Reference 150A (v2) delivers that with very good resolution and dynamics… all without the overly detailed, dry and over damped sound that many solid state amps are known for. The Reference 150A V2 is the successor to the well known and highly reviewed 150A, 150A Hot Rod series of amplifiers with a number of refinements that allows it to deliver great performance and value that the 150A has always been known for. With 125W/Ch into 8 ohms (double that into 4 ohms or the ability to run as a balanced bridged 500W monoblock), the Reference 150A can comfortably drive a wide range of speakers and loads and comes with high quality jacks, dual mono circuitry, all discreet (using both bi-polar and FET devices) circuit design. Available in Silver or Black.