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CA2622 Input Transformer
Number of Products in stock: 36

Click to enlarge
Click to enlarge

The CA2622 is a custom made audio input transformer. The CA2622 has been designed by us to sonically replicate the transformers found in the vintage API recording consoles from the 1970's. In the console, this transformer was used as the microphone input transformer on the input channels. Albeit a modern footprint, this input transformer will give your mic preamp the same signature vintage tone as an original AP2622.

The vintage AP2622 is probably most renowned for it's part in the unique sonic character of the coveted API 312 card. The 312 was originally designed as a utility "plug-in" mic preamplifier, booster amplifier or line amplifier. With the combination of the 2622 input transformer, the 2520 discrete operational amplifier and the 2503 output transformer, you have one of thee most sought after microphone preamplifiers ever designed. The circuit is ever so simple and the components far from perfect. The inherent phase shift and distortion, are what make it all sound so special.

In a quest to expand my resources, I felt it was time for an alternative version. This quest was started by me pulling two original AP2622's from my vintage API console. These were sent to the winder who supplies me with all of the Litz style output transformers. One was dissected and the other saved for bench testing. From my findings, the AP2622's in my board were true 1:8's. We started with that version which I am saving for some upcoming assembled only modules. For past consistency, I felt it important to keep the kit version of the CA2622 a 1:7 part so my winder made a 1:7 version of our newly created 1:8 part. Low and behold they are essentially sonically indistinguishable from Ed's EA2622.

Dual primary impedance of 150 or 600ohms
Secondary impedance of 10K ohms
Turns ratio of 1+1:7 (Primaries in parallel for 1:7, Primaries in series for 1:3.5)
Encased in a mumetal can for magnetic shielding
The physical layout matches the popular CMMI-8-PCA input transformer as well as the EA2622

Additional information:

PDF specs

  This product is proudly manufactured in the USA

This product was added to our catalog on Wednesday July 26, 2017.
Classic Audio Products, Inc.
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Classic Audio Products, Inc. is not affiliated with API. Customers and fans should not refer to Classic Audio Products, Inc. as "Classic API." API is a registered trademark of Automated Processes Incorporated. Classic Audio Products, Inc. has no affiliation with Automated Processes Incorporated.
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