M70 6CA7 Power Amplifier

6CA7 TUBE

We built the M70 power amplifier around four EL34 tubes in an ultra-linear circuit that delivers 40 watts of subtle, textured music. In good recordings, you’ll hear the highs and depth. The hue retains its color and body. To make the most of the design, we used the best capacitors and resistors we could find. Custom-wound outputs and power transformers were specially designed to extend the bass and treble. Equally important, the military-grade epoxy circuit board was designed to minimize interactions between components. You can also see the steps we took by looking inside. There are no ratshoes here; Teflon wires are neatly arranged, and the grounding paths are carefully considered—all adhering to the best traditions of American craftsmanship.

Special features:

Navy blue powder-coated thick steel chassis with silver-anodized aluminum panels.

Superlinear push-pull stereo Class A design.

Extra-large hand-wound power supply and output transformer (made in the USA).

Custom-made gold-plated brass bottom connector

Specification

Rated output power: 40 watts RMS

Input sensitivity: 0.45V for full output

Input impedance: 100,000 ohms

Frequency response: From 15 Hz to 55,000 Hz +/- 2dB

<Total harmonic distortion: 0.5%

Signal-to-noise ratio: below 1 watt – 84 dB

Damping factor: 12

Energy consumption: 275 watts (real RMS)

Output impedance: 4.8 ohms

TUBE： 4 x 6CA7

2 x 6SN7

1 x 12AX7

Dimensions: 17.5 inches (W) x 15 inches (D) x 8 inches (H)

Net weight (per aisle): 46 lbs