The MP512 is based on one discrete Op-Amp, one Cinemag input transformer and one Cinemag output transformer.

It delivers what is called the "LA" sound, popularised by the famous American consoles of the 70's : the punchy midrange and tight bass tone of the iron. This MP512 is great on drums, electric instruments and generally all close miked sources.

Just install it in your API* compatible Lunchbox^TM rack and start recording.

Highlights

• Discrete Op-Amp (DOA) pinout compatible with the API* 2520
• Original Cinemag (Reichenbach) transformers on input and output
• 70 dB of gain
• Variable output pad for those who like to drive it hot
• Fet DI input, relay switched, the signal passes through the input transformer
• Signal/Clip LED monitors signal with full wave rectifier
• All low level signals switched by relays
• Golden contacts on relays and switches
• High grade components throughout
• High grade double sided PCB with plated holes
• Available assembled or as a full kit (everything included)

Controls

1 Output Pad: This potentiometer attenuates the output signal, after the output transformer.

2 Signal/Clip LED: Flashes green when a signal is present and turns red 3 dB before clipping

3 Gain: In combination with the gain switch, this potentiometer sets the total gain between 0 and +70dB.

4 Gain switch: Center and right positions set respectively medium and high gain while left position adds a -20dB pad on the input.

5 Polarity Sets the polarity (phase) of the output signal. Center is a mute

6 Sends phantom power to the microphone

7 High impedance input (> 1 megohm) for instruments. The instrument signal goes through both transformers.

What's in the kit?

Absolutely everything!

• Passive components (resistors, capacitors),
• 2 Cinemag transformers
• Active components (diodes, transistors, LED, ...),
• Front panel elements (switches, potentiometers, knobs),
• Connectors, relay,
• PCB's,
• Front panel and side panel,
• All hardware

You bring the solder (use good quality solder, 1mm diameter max) and the Lunchbox.

Difficulty level

The MP512 kit is an easy build. The DOA is a little more difficult because of the components density.