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Jensen Transformers JT-MB-CA 1:1 Microphone Input Transformer
for Ultra-low Noise Amplifiers
Jensen Transformers JT-MB-CA 1:1 Microphone Input Transformer
The Jensen Transformers JT-MB-CA 1:1 Microphone Input Transformer features a dual Faraday shield for very high CMMR of 122 dB at 60 Hz, as well as a 30 dB magnetic shield. The wire leads and included angle bracket mounting hardware make it perfect for DIY projects. Also available in a PCB mounting style (cart option below).
Like all Jensen microphone input transformers, the JT-MB-CA offers legendary sonic transparency. Internal Faraday shielding virtually eliminates hum, buzz, and RF interference, while MuMETAL® magnetic shielding cans reduce hum caused by nearby magnetic fields. Optimized noise performance is ensured by matching the step-up turns ratio to you input stage design. Extended low-frequency and Bessel-tailored high-frequency response results in the ultra-low time-domain distortion (DLP) that only Jensen offers. Insertion loss is minimal and adding phantom power is simple.
Here are some specs:
- Impedance ratio: 150:150
- Turns ratio: 1:1
- Maximum 20 Hz input: +2dBu
- THD @ 20 Hz: 0.045 %
- 20 Hz re:1 kHz: -0.10 dB
- 20 kHz re:1 kHz: -0.04 dB
This transformer is also available in a PCB mounting style as JT-MB-CPCA.
With inferior products coming from all over the world, we think it is a genuine treasure to find a company like Jensen Transformers, actually designing and manufacturing some of the finest products in the world, right here in the USA, and we are proud to be able to offer their products. The JT-MB-CA is made in the USA, is backed by the manufacturer's comprehensive one-year warranty, and has a remarkable 20-year warranty on the transformer device itself.
Jensen Transformers' Description
Jensen Transformers JT-MB-CA
Microphone Input Transformer
1:1 FOR ULTRA-LOW NOISE AMPLIFIERS
- Ideal retrofit to solve problems with transformerless preamps
- Dual Faraday shields provide very high CMRR: 122 dB at 60 Hz
- Eliminates complex circuitry required to block 'phantom' power
- Excellent frequency response and time domain performance
- Low transformer related Noise Figure
This transformer is designed to couple a nominal 150 Ω mic to the 3 kS input impedance typical of 'transformerless' preamps. Both windings are fully balanced and either may be reversed to invert polarity. A 30 dB magnetic shield package is standard. Not recommended for mic 'splitter' applications (use JT-MB-C).
Here is a good look at the wire leads.
This shows how the included angle bracket mounting hardware works.
Here is the JT-MB-CA spec sheet. PDF format.
Why Cable Solutions?
- Cable Solutions is an Authorized Jensen Transformers Distributor, so our customers are ensured full warranty protection and technical support. (Jensen Transformers is obligated to provide neither warranty nor technical support for products purchased from unauthorized resellers!)
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