Negative feedback is used to stabilize the gain and reduce distortion, noise and output impedance. DC stability and speaker offset voltage is properly regulated by using an accurately trimmed DC servo amplifier. This method introduces less coloration than using coupling capacitors.

The 150A Reference has been engineered to be among the most effective products on the market at dampening the back EMF from speakers. The results are heard as tightly controlled bass that has detail, texture and separation.

The technology behind the Belles 150A Reference is impressive. Even more impressive, however, is the sound. Listening to the 150A Reference has been described as a memorable experience; you feel as though you are part of the musical performance.

Features

• Dual-mono design topology.
• Each channel an integrated circuit assembly
• Gold-plated oxygen free copper binding posts and wire
• Gold-plated input connectors accomodate balanced and unbalanced signals
• 1000 VA torodial power transformer, to eliminate stray magnetic fields
• A pair can be used as monoblock units
• Uses polypropylene capacitors
• All power resistors are non-inductive ceramic
• 1% metal film resistors used throughout
• 3 stages of amplification
• Negative feedback circuit stabilizes gain and reduces distortion, noise and output impedance
• Uses a trimmed DC servo amplifier to maintain DC stability and speaker offset voltage.
• Available with either a silver or black anodized front panel

and many others...

A pair of 150A Reference amplifiers have exceptional performance and power at 500 Watts per channel into 8 ohms!