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Jensen Transformers JT-123-BMCF Line Output Transformer

Line output transformer, with bifilar windings, 80% nickel laminations, +27dBu @ 20Hz

Made in the USA
Jensen Transformers JT-123-BMCF Lline Output Transformer

Jensen Transformers JT-123-BMCF Lline Output Transformer

Jensen Transformers JT-123-BMCF line output transformers allow any output stage circuit topology, whether balanced or unbalanced, to drive any equipment input, whether balanced or unbalanced, without regard to special connection rules or specific cables. Hum can be substantially reduced due to the isolation they afford.  JT-123-BMCF offers the industry’s best combination of bandwidth, level handling, distortion performance, and extremely low “leakage” (effective series) inductance to drive very long cables.

Here are some key specs:

  • Impedance ratio: 600:600
  • Turns ratio: 1:1
  • Maximum 20 Hz input: +27 dBu
  • THD @ 20 Hz: 0.002 %
  • Frequency Response: 20 - 20 KHz,  -0.01 / +0.00 dB
  • See spec sheet for additional details

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-123-BMCF 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-123-BMCF Line Output Transformer


  • Distortion 0.002% typ at 20 Hz and +4 dBu output level
  • Wide bandwidth: -3 dB at 0.05 Hz and 325 kHz
  • Drives 600 Ω loads to levels up to +27 dBu at 20 Hz
  • Excellent time domain performance: DLP 0.7° typ 20 Hz to 20 kHz
  • Loading loss only 1.1 dB when driving 600 Ω load

This transformer is characterized for 1:2 step-up applications in high performance line output stages. For 1:1 applications, consider the JT-11-BMCF. The 80% nickel core material allows high output levels with very low distortion. Driving signals should be free of DC and source impedance as low as possible.

Jensen Transformers JT-123-BMCF

Here is another view of the  transformer.

Jensen Transformers JT-123-BMCF, included items

The JT-123-BMCF is packaged in a small cardboard box as shown here, and we include a printed copy of the data sheet.

Jensen Transformers JT-123-BMCF Specs - click to download PDF

Here is the JT-123-BMCF spec sheet.  PDF format.

Purchase Information
Product Description SKU MSRP Your Price Quantity
Jensen Transformers Line Output Transformer with bifilar windings, 80% nickel laminations JT-123-BMCF $129.99 $106.99
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