Fredenstein F610 Universal Entzerrer UE-1 500 Series Stereo 4-Band Parametric Equalizer and 30-Band RTA

As an equalizer, the F610 UE-1 features four fully parametric bands, each with adjustable frequency from 20 Hz to 20 kHz, Q control, and up to 16 dB of boost/cut in 0.25 dB steps. Plus, it provides a low-cut filter and switchable harmonic coloration based on tube characteristics. The EQ can be used in stereo or as two independent mono EQs with the ability to copy and paste across channels. The 30-band RTA is configurable to allow viewing of the input or output signal for the left, right, or 2-channel signal, and it has customizable range and decay settings.

Analog EQ with Impressive Digital Tech

The Fredenstein F610 Universal Entzerrer UE-1 is a digitally controlled stereo analog 4-band equalizer and 30-band spectrum analyzer in a double-slot 500 Series module. The F610 UE-1 name is an homage to the classic K&H UE-100. Entzerrer is the German technical term for equalizer.

Color LCD with Touch Fields

For the first time in a 500 Series module, Fredenstein implemented a high-resolution 3.5 LCD color display including a capacitive touch controller, thus welcoming the 500 Series to the 21st century.

Four Flexible Filters

The four filters are all identical and each can be tuned from 20 Hz to 20 kHz. The encoder rotary frequency knob allows access to about 190 different frequencies per filter, while the USB interface allows for 1 Hz frequency resolution. The maximum filter gain is A±16 dB, adjustable in 0.25 dB steps. In case more gain is needed, additional filters can be set at the same frequency for up to 64 dB of boost or cut. The Q-factor of each filter can be varied from 0.4 to 7.9. The Filter 1 characteristic can be changed from bell to low-shelf and Filter 4 from bell to high-shelf.

Low-Cut Filter and Harmonic Coloration

A variable 12 dB/octave low-cut filter with a range from 20 to 975 Hz is provided as well as a Color function that imparts a tube-like sound. The hard bypass allows for quick evaluation of the EQ d results.

30-Band RTA

The 30-band spectrum analyzer features a 60 dB dynamic range with selectable sensitivity from +6 to + 24 dBu in 6 dB steps. The choice to feed either the input or the output signal to the analyzer adds to the versatility of the F610.

User Settings

Up to 99 complete settings can be stored in the internal non-volatile memory and a micro-USB interface provides complete control from a connected host computer via RS232 over USB.