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CA-11DI Mk2 Transformer
[CA11-DI-Mk2]
 US$99.99 
Number of Products in stock: 45

Click to enlarge
Click to enlarge

The CA-11DI Mk2 Transformer is a high impedance, made in the USA instrument direct inject transformer. This custom made transformer is heavily based on the ever sought after UTC A-11, without being a direct clone. Our goal was to capture the tone and vibe of the UTC A-11 while only bringing out the necessary taps specific to direct inject use.

In a vintage direct box with a UTC A-11 it was common to see the UTC A-33 20dB magnetic shield used even though the A-11 has fairly good noise rejection due to its twin coil humbucking design. Our CA-11 is potted in a steel can with a cadmium plated lid. We have a unique internal array of mu-foil covering different planes of the transformer. This mu-foil EMI shielding yields an approximate 28dBs of additional hum reduction.

As a unique DI feature, we have brought out multiple secondary taps. Due to physics, this changes the impedance seen by the bass, guitar or whatever is plugged into the primary. When investigating a few homemade, vintage, pro studio direct boxes...we found the 31.5:1 ratio to be used for some absolute blissful magic.

Mk2 you say? Yes, this is the 2nd version of our UTC A-11 style transformer. Our winder could no longer get the laminations that he used for the 1st version. His original supplier went out of business. Bad for them but good for us as the new version sounds even better and more true to the vintage UTC transformer than his 1st version. Laminations are plentiful for the Mk2 so no worries in having supply issues in the future.

Primary Impedance: 50k ohms
Secondary Impedance: 31.5:1 = 50 ohms, 10:1 = 500 ohms
Instrument impedance into 1k ohms mic preamplifier: 31.5:1 = 1M ohms, 10:1 = 100k ohms
Full kit bundles including the CA-11DI Mk2 can be found here

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  This product is proudly manufactured in the USA
 

This product was added to our catalog on Saturday April 06, 2024.
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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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