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Fredenstein F606 Balancer  From Fredenstein

500-Series Module that takes Unbalanced Inputs and Converts them to Balanced Outputs

Fredenstein Professional Audio


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Manufacturer's Description from Fredenstein

The F606 is a high performance professional two channel unbalanced to balanced converter with variable gain. It also provides polarity reversal for each side and a clip indicator. The F606 is intended for Bento racks which provide two inputs per slot, so stereo modules are possible.


This is a utility module perhaps most used to connect consumer gear to the professional studio, such as connecting a client's portable device in the control room. It can also be used to connect hi-fi gear, synths, guitar amp modellers, etc. Typically a low noise, high impedance input is needed. Consumer gear may be 10-20 dB lower level which requires gain, however fixed gain is rarely optimal. With 26 dB of available gain, with a high quality volume control and phase switches make easy work of otherwise compromised set-ups.


Fredenstein Professional Audio

About Manufacturer

Think about what is sonically missing in today's audio equipment and how you could achieve better results in recording and mastering? Now, many go back to well proven classic pieces of audio gear to fight the shortcomings of digital recording. Could that be the ultimate solution? Did the improvements in technology during the last 50 years really don't apply to recording? Using technologies from vacuum tubes to Digital Signal Processors, often in the same product, Fredenstein products combine the strength of each technology and avoiding their weaknesses. In addition we strongly believe in Zero-Negative-Feedback, negative feedback is a technique to make amplifiers more linear, but at the same time making them sounding harsh. This is one of the reasons modern equipment sounds so similar. Omitting negative feedback and using an internally and externally balanced designs which are very linear by design will yield a natural sound on a different level, warm, not dull or muffled, instead with a rich silky top-end and an impulse response will simply blow you away. Don't get us wrong, we are not talking about 「esoteric designs」, we believe very strongly in a scientific engineering approach.


We also provide pieces of long neglected equipment like precision analog meters. Even if you are working mostly inside the 「box」, metering your analog signal before it hits your converters is still very important and a great foundation for good recording. Fredenstein's state-of-the-art audio technology will help you throughout your chain to achieve truly outstanding results.

In addition, Fredenstein believes recording engineers deserve to have a more user friendly, more convenient and efficient pieces of equipment making the studio life easier and generate a more comfortable working environment. By minimizing the number of buttons and switches without sacrificing the functionality we deploy a clean user interface allowing you to get instantaneously familiar with the products.

Fredenstein Professional Audio Products are designed for audio professional in recording and broadcast studios as well as independent engineers and producers in their own facilities.

Fredenstein is focused to make a difference in Professional Audio. You can expect superior sound and high-end built quality from each of our products


Frequency Response: 10 Hz – 30,000 Hz, +/- 0.5dB

Distortion: < 0.01%

SNR: < -100 dB

Input Impedance: 100 KOhms

Max. Input Level: +18 dBu

Output Impedance: 50 Ohms

Max. Output Level: + 24 dBu






F606 Manual