The AB528 is a transformers coupled, class A mic preamp. The design, from the late 60's, is inspired by a legendary console, that was used at the most famous London studio by the greatest artists, such as the Beatles or Pink Floyd.
The AB528 is a pre with character, vintage sounding, warm and silky, with a lot of attitude when driven hard.
Install it in your API* compatible LunchboxTM rack and start recording.
1 Output level: Potentiometer that sets the signal level to the output stage. Works like a console fader and allows driving the preamp hard.
2 Signal/Clip LED: Flashes green when a signal is present and turns red 3 dB before clipping
3 Gain switch: Sets the gain between +10 and +60dB.
4 Input impedance: Center is the standard 1200 Ohms input impedance. Left sets a 300 Ohms low impedance and adds 6 dB of gain, useful for ribbon mics. Right sets a 6 kOhm impedance input pad for line levels.
5 Polarity; Sets the polarity (phase) of the output signal
6 Sends phantom power to the microphone
7 High impedance input (1.5 megohm) for instruments. The instrument signal goes through both transformers.
You bring the solder (use good quality solder, 1mm diameter max) and the Lunchbox.
The AB528 kit is an easy build.
There is no setup needed.
XT500 Extender: The XT500 option is a cable extension that allows you to test and setup the module outside the lunchbox while connected.
501 Case: The 501 case option is a standalone, single slot lunchbox with PSU.The XT500 Extender is not needed with the 501.
Assembled Product: If you prefer not to DIY, choose an Assembled product. It comes fully assembled, ready to use.
V+ : +85mAV- : -82mA
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