6 High quality tube mic preamps
Input pad/gain control
Polarity switch
Dual impedance input
80Hz High Pass Filter
48v Phantom Power
Channel mute w/selectable solenoid output control
Output Volume Control
Left/Right/Direct Out, Solo for each channel
Mic, Instrument, Line inputs
Expansion slots accept Series 500 style modules (shipped with our own line input module).
Left/Right Master Volume
Cinemag Input xfmrs
Cinemag Output xfmrs on Left/Right Outputs (optional on Direct Outs)
2 VU Meters.
Mono and Dim on control room monitoring.
Headphone Outputs
Separate Rack Mounted Power Supply
Input/Output connections on High Density EDAC

NOTE: Specifications on all Busby Electronics products are subject to change without notice. Such changes will usually be made as improvemnents to design.

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Audio Sample

Haven't a Clue

(Tess Fama ©2009)

Recorded in our project studio using the first build of preamp and output buffer stage. You can expect better than this quality from our production model mixer and 2 channel rack mount preamp. There was no shielding in place on first stage tube or output section for this recording. As this is using only one channel, each instrument was laid down separately.

Acoustic guitar: Advanced Audio CM54 FET condensor mic, no eq, no compression.

Bass: Fender Precision through Hartke amp, GK 4x10 cab, Advanced Audio CM12 Tube microphone, no eq, no compression.

Vocal: Advanced Audio CM12 Tube microphone, no eq, no compression.

Slide Guitar: 1921 Lyric acoustic slide guitar, BBand pickup, direct into preamp instrument input, no eq, no compression.

Mix: recorded using Ardour software on a Mac G5 tower. Reverb effect added in Ardour, as well as entire mix compressed 2:1 over -20db.

I/O on Breakout Cable or Optional Patch Bay or Multi-Snake. Full specifications coming soon.

Start of production is set for April 26, 2010. Orders are being taken now.

Input/Preamp Module

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High Gain, Low Noise:

Cinemag input transformers stock.
HiZ Instrument Input
Balanced microphone and line inputs.
Optional Balanced Direct Output transformer.
Dual Input Impedance Selector (values dependant on selected xfmr)
Input Polarity Switch

The preamplifier tube board, holding the 2 stages of preamplification using 6au6 tubes. The preamp has enough gain to handle the most sensitive ribbon mic, and allows padding and feedback control to take higher level inputs.

Monitor & Meter switching (selected switch displays orange "winkie" button top).
Stepped Left and Right Master Output level controls.
Headphone output control for 2 Stereo Headphone jacks.
Master Send control.
2" VU Meters for Left and Right output. Left meter switches to show solo level for selected inputs.

Switches shown with Main output and

Mono monitoring selected.

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A 2 channel version of the output buffer board. Each 12BH7A tube handles one channel. The standard option is unbalanced output, but there is a connection for attaching the optional output transformer. We will supply Cinemag, Jensen, Lundahl or Sowter.