Transformer Conversion Microphone Rebuild

(1 customer review)


Convert your low cost Transformerless Mic into a Transformer-Coupled Go-To microphone!  Your mic gets a new high quality LDC capsule, our hand-assembled BFM circuit and a boutique quality transformer!


The badge is laser cut in nickel and allows the background color to show through the letters. We can apply one of several background colors for the badge. We can also optionally paint the entire body cylinder although in most cases we recommend against this.


Instructions for shipping your mic to us will be provided after checkout

  • Options Price: $0.00
  • Product Price: $299.00
  • Total: $0.00
SKU: 800u-tc Category: Tags: , ,


This is a rebuild of YOUR transformerless microphone which will convert it to a transformer coupled mic.

Since this covers a variety of different mics, please contact me before purchasing. 

Your low-end, low-cost mic is transformed into a very solid performer – with a little extra Transformer Mojo.  Harsh, sibilant high-end becomes smooth and silky. Thin bottom end becomes full. In the middle is a great harmonic richness that works well on almost anything you throw at it. The transformer brings some fantastic dynamics and saturation characteristics.

Your modified microphone will be returned after just a few days in our shop.

Standard Upgrade

  • k47 style Brass Ring or CK12-style* Capsule in Custom Mounting Cradle
  • All-discrete BFM transformer coupled circuit (Cardioid only)
  • Transformer mounting board

Options Available:

  • Internal Cardioid/Omni Pattern Switch (you must open the mic to access it)

Transformer Choices

  • CineMag (USA) 5722w. This is a very high quality transformer which is still moderately priced. It has a very full, even tone with great harmonic content and transformer crunch. Probably the best choice overall for most applications
  • The Tab-Funkenwerk (USA) T12 style. This is a more expensive transformer. It has a massively fat and full low and low-mid response. Although it has great high frequency response, you may perceive the overall tone as slightly dark because of the extra full lows and low-mids.

*CK12 capsule may not fit in all mics.

Additional information

Weight 4 lbs
Dimensions 10 × 12 × 8 in

CineMag 5722 Transformer, Tab-Funkenwerk T12 Transformer

1 review for Transformer Conversion Microphone Rebuild

  1. David Arnold (verified owner)

    I had two Sterling mics upgraded and they are a huge upgrade from the original product. I highly recommend anyone getting an upgrade from Rockscience.

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