Mike Fortin designed.  Sounds incredible and a great solution for recording, PA-direct, home-playing or feeding the return loop on a large amp. 

The RD1H Diavolo is a single channel, all tube (12AX7 (2) / 12AU7 (1)), 1 watt amp head with a 3 way Tone Stack Shift for mid-range contour. It has a class A discrete instrument level FX loop and a speaker emulated XLR direct output with dummy load for silent operation and ground lift.

The output tube (12AU7 – dual triode) is configured as push-pull stage which I think sounds a lot better than single-ended (Hey Champ!) designs that sound “honky” to my ears.  Plenty of YouTubes to check out and I imagine you’ll also be blown away when you first play through it. 

One caveat I should mention is keep the volume at 3 o’clock or less or the amp can flub out a bit.  No worries as it reaches full volume and scorching gain before that.

This RD1H was offered (discontinued) in Gray exclusively in the USA at Musicians Friend and Guitar Center.  This is an unopened head in original box

SPECIFICATIONS

ELECTRONICS

Controls:         Volume, Gain, Tone, T.S.S. Switch

Wattage:         1 Watt

Channels:       1

Impedance:    8Ω Min. - External Jack

FX LOOP:        Class A Discrete Instrument Level Loop

Tube Type:     two 12AX7 / one 12AU7

Inputs:            1 x Standard Guitar Input, FX Return

Outputs:         1 x Standard Speaker Jack, 1 x XLR Speaker
                                                        Emulator, FX Send

GENERAL

Dimensions:   12.20 x 8.66 x 6.93 inches

Weight:           12.13 lbs