BSC makes Class A amplifiers and utilizes Class A circuits. Class A components offer many electrical advantages over low, high, and even sliding bias class A/B designs, such as self-regulation, minimized high order harmonic artifacts, and lower distortion - all of which contribute to better sonic performance.

"Most, if not all, of my very favorite playback systems throughout the 1980's to 2000's contained relatively simple, but powerful class A amplifiers. The magic midrange and air surrounding all of the instruments and voices had to be a prominent characteristic in all of my products." - Bret D'Agostino

BSC products have a 5 year warranty for parts and labor.

Based around a 1,450 VA custom toroidal transformer and over 108,000 microfarads of filter capacitance, the M5 amplifier can deliver thunderous power output. The M5 amplifier doubles its 8 ohms rated output power into 4 ohms at 300 watts, 2 ohms at 600 watts, and 1 ohm, where it produces over 1,200 watts continuously. The M5 has a more than comfortable abundance of power to control even the most difficult of loudspeakers while maintaining its continuous current class A operation.

The M5 has two ultra-quiet Plitron™ toroidal transformers coupled to one high current and two fully regulated power supplies. The second transformer is designed for the soft turn-on and other low level circuits to allow the M5 to be activated either by a 12-volt trigger source or the front panel switch. The M5 draws less than 2 watts in standby mode.

The M5's output stage is comprised of 4 massive, internally mounted heat-sink towers designed to cool all twelve of the 230 volt, 17 amp, 200 watt output devices. All power signal routing traces are curved and constructed of gold plated 3 ounce copper. The towers are optimized to disperse the heat generated by the 150 watts of pure Class A power over a wide cross section, reducing the overall chassis temperature. A unique aspect of the output stage is that it is nestled between the heatsink towers. The output circuit boards are mounted in a way that allows maximum heat transfer, but also field serviceability should it become required.

The M5 allows the user to quickly reduce the Class A bias on the amplifier to a half-power, approximately 75 watt, high bias class A/B mode, and further to a very low power ECO mode via the front panel rotary switch. Bias flexibility allows control over your power demand and ambient temperature in different listening situations, but does not limit the amplifiers output power potential.

The newly designed driver section of the amplifier is based around a discrete, complimentary, and DC coupled circuit transferred onto a 4-layer circuit board. The signal paths are made of gold plated 2 ounce copper, and are kept short and utilize curves in order to pass critical analog signal through the least amount of circuitry possible. All the components meet or exceed military standards, and are over specified to promote long life expectancy.

The M5 has several layers of protection circuitry outside of the signal path designed to protect your amplifier and surrounding equipment when possible. Protection reacts to short circuit, excessive DC offset, over current, and excessive temperature situations should any of them occur. The M5 external chassis is comprised of ½ inch thick machined 6061 aluminum. Each panel is affixed to the ⅛ inch thick aluminum sub-chassis with stainless steel fasteners. The face plate components are machined and sculpted from solid 2 ½ inch aluminum blocks. Every part is custom machined: from the multi-part bias knob assembly to the solid brass and gold plated output binding posts. A custom automotive finish is applied to the cosmetic metal surfaces to enhance and protect the M5's visual architecture.

16.50 in (W) x 10.90 in (H) x 20.75 in (D)

or 419.10 mm (W) x 276.86 mm (H) x 527.05 mm (D)