Cwejman AP-1 Mk2 Audio Processor


You want to feed microphone or instrument signals to your modular system? – Not a problem for the AP-1 Mk2! The module features a preamplifier with 48 V phantom power for condenser microphones, a compressor with editable side chain filter and parallel processing capability as well as a voltage controlled envelope follower. The sound is reminiscent of high-class studio mixers. – Typically Cwejman!

We currently do not accept pre-orders for Cwejman products. If you are interested in this module, please use the availability notification. The number of Cwejman circuits is limited. Therefore, we recommend you to order online IMMEDIATELY when a module becomes available. Enquiries via e-mail or telephone are usually not fast enough. (More detailed information can be found on the product page.)


The Mk2 version of the AP-1 comes equipped with a new state of the art preamplifier for microphone, line and high-impedance instrument signals. The input level can be increased in seven steps from +6 dB to + 60 dB using a rotary switch. A red LED provides visual feedback in the event of distortion. A toggle switch allows you to select either the XLR microphone or the 6.3 mm instrument input. The first mentioned socket can be fed with 48 V phantom power.

The compressor offers a rotary switch for choosing between inactivity, ratio values ranging from 1.2 to 14 and limiting. A high-pass or low-pass with variable cutoff frequency can be added to the side-chain. Using the mix knob, it is possible to crossfade between raw and compressed audio material. Thus, parallel dynamic processing is not a problem for the AP-1 Mk2. An audio input allows you to use the compressor on its own.

Last but not least, the AP-1 Mk2 features an extremely fast, very precise envelope follower. Attack and release behavior can be set manually plus there are CV inputs for both parameters. The envelope follower emits CV and gate signals.

Levels at the audio output of the AP-1 module are visualized by an eight-stage LED meter.

Please note: The price refers to the predecessor of the module and might change for the new version.

We currently do not accept pre-orders for Cwejman modules. For some products, there are waiting lists with pre-orders from the years 2013 to 2017, which are being processed as a matter of priority.
If you’d like to be informed as soon as this module is back in stock, please activate the availability notification via e-mail.
Please note: The number of Cwejman modules is always limited and much lower than the number of interested parties. Therefore, we recommend to order IMMEDIATELY and ONLINE if a Cwejman product becomes available. Enquiries via e-mail or telephone are usually not fast enough.
If the demand is higher than the supply, unfulfillable pre-orders will be deleted. In this case you’ll receive an e-mail. (Pre-orders on the waiting lists mentioned above are excluded from this policy.)


XLR microphone input
1/4 inch instrument input
Compression audio input
Attack and release CV inputs for envelope follower
CV and gate outputs for envelope follower
Audio output


3 U Eurorack module, 18 HP wide, 25 mm in depth

0.5 kg
Article Number
External Links
This product cannot be reserved. Please use the email notification.
€ 19% VAT excl. €557.14 € 19% VAT incl. €663.00
Excl. 19% VAT, Excl. shippingLieferzeit 1