The U788 and U789 Denoiser are single band single-ended noise reduction systems. For the removal of low-level instrument noise or buzz can be removed or reduced effectively. The Denoiser is also useable if the application of a Noise gate or expander is not effective or is not possible at all.
The U788/U789 Denoiser has balanced and floating inputs and outputs. All inputs and outputs can process levels up to +30dBu in the frequency range. A symmetric circuit is used for the entire audio chain and the internal Headroom from input to output is +30 dBu.
The Denoiser fades out high frequency disturbances by a tension-steered filter. The Threshold fader with a range from -70 to -30 dB determines the application point of the regulation. If the level falls under the opposed value, the Denoiser cuts the frequency band. The selectable frequency range is between 200Hz and 6kHz. The lower the level drops under the opposed Threshold, the more the filter has an effect. The attack is not adjustable and to is approx. 0.1 Ms. The release is adjustable between 60ms and 1.5 seconds.
A light-emitting diode chain with 8 diodes shows the momentary frequency attenuation of the filter. The switch DNOISE-ON turns on the unit.
The U788 is the mono version of the Denoiser and the U789 the stereo version. Both devices are standard V700 and fit into standard mounting frames.
