Arkham Zephyr 1U Tube Bass Preamplifier Ampeg design EXCELLENT

Great handmade tube bass preamp from Arkham Sound in Maine. Based on classic Ampeg tube amp circuitry. This one never left my home practice space and is in excellent condition. Originally bought direct from Arkham. Includes original DC power supply.

I bought this thinking I would be recording and gigging more but it didn't come to be, so I need to thin out some gear and am selling at a loss. Great preamp from a great boutique company.

Further info:

Reintroducing the Zephyr, a vacuum tube pre-amplifier inspired by the iconic Portaflex Bass amps of the 1960's. Effectively a rackmount version of the Oracle, the Zephyr is housed in a robust 1U chassis and sports a few additional features. The buffered 1/4" output provides ample gain to feed a modern power amp or the line input of your recording interface. The DI output features a high quality output transformer, with Mu Metal shielding for ultra quiet operation.

The heart of the Zephyr is a single 12AX7 tube, selected for low noise and good tone, and fed by a 300VDC power supply.

Specifications:

IN: 1/4" TS, Input Impedance = 1 Meg ohm

GAIN: Up to +32dB at flat EQ settings.

TREBLE, BASS controls use a James Tonestack to provide a wide adjustment range with minimal interaction

RANGE control sweeps tonestack "midpoint" anywhere between 150Hz and 1KHz

HI: Gentle rise from 500Hz to 2kHz, at lower Gain settings

MID: +3dB boost at 250Hz

LO: +6dB boost at 80Hz

HPF: High Pass Filter -6dB/Octave at 90Hz

PRE and DI OUT controls. Seperate master volumes let you dial in some grit, and adjust stage volume to the board

THRU: 1/4" TS, takes signal from the input for feeding a stage tuner or additional amplifier

LO-Z: 1/4" TS, output impedance = 150 ohm

DI: XLR with Ground Lift (up is lifted). -12dB relative to Out jack.

Powder-coated steel and aluminum 1U chassis. 19"W x 1.75"H x 9"D. Weight = 5 lb, 7 oz