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Intended for professional use; switch off rack power before insertion/removal; avoid heat, moisture, or shock.
One-year warranty for defects in material/workmanship; repair/replace by arrangement, freight prepaid.
Complies with RoHS directive, no lead. Dispose responsibly via local authority recycling systems.
Describes the sweepable low pass filter with unity gain, selectable roll-off (12/24dB/octave), and cutoff from 75Hz to 24kHz.
Utilizes the TRACK SIGNAL function for dynamic noise reduction by tracking high frequencies.
Describes the sweepable high pass filter with unity gain, selectable roll-off (12/24dB/octave), and cutoff from 15Hz to 16kHz.
Utilizes the TRACK SIGNAL function for dynamic hum/rumble reduction by tracking low frequencies.
Explains linked stereo tracking with a second Hi-Lo module for unified control of left/right signals.
Details jumper use for API Radial Workhorse compatibility and enabling stereo use on that platform.
Describes achieving higher slopes (up to 48dB/octave) by connecting multiple Hi-Lo modules in series.
Lists key technical details including impedance, input/output levels, distortion, and frequency response.
The Trident Hi-Lo Dynamic Filtering module is an adaptive Hi-Cut/Lo-Cut frequency filtering module designed for professional use within 500 Series Modular Rack systems. It offers dynamic response to program material, providing a high degree of control and signal enhancement.
The device features two primary filter sections: Hi-Cut and Lo-Cut, each with independent controls and dynamic tracking capabilities.
This is a sweepable low-pass filter with unity gain in the selected passband. It offers selectable roll-off slopes of 12dB per octave or 24dB per octave. The cutoff frequency can be set from 75Hz to 24kHz. A RESONANCE control can be switched into the circuit to introduce a resonant peak at the selected cutoff frequency. The size of this peak, which depends on the selected frequency, can be varied from zero to approximately +12dB, stopping just short of self-oscillation at maximum.
The TRACK SIGNAL function enables the Hi-Cut filter for dynamic noise reduction, utilizing the psychoacoustic effect of 'masking'. In this mode, the cutoff frequency dynamically tracks the high-frequency content of the music. The FREQUENCY control sets the frequency to which the filter will close down in the absence of high-frequency content. This is particularly useful for reducing background noise from sources like analogue tape. Higher resonant settings can make the filter's movement audible, creating unique special effects, especially when combined with lower FREQUENCY control settings. The wide sweep range of the Hi-Cut filter, from subsonic to full audible bandwidth, allows for creative fading of tracks in and out in the frequency domain rather than the amplitude domain.
This is a sweepable high-pass filter with unity gain in the selected passband. It offers selectable roll-off slopes of 12dB per octave or 24dB per octave. The cutoff frequency can be set manually from 15Hz to 16kHz. Similar to the Hi-Cut, a RESONANCE control can be switched into the circuit to introduce a resonant peak at the selected cutoff frequency. The size of this peak, dependent on the selected frequency, can be varied from zero to approximately +12dB, stopping just short of self-oscillation at maximum.
The TRACK SIGNAL function enables the Lo-Cut filter for dynamic hum or rumble reduction. It operates on the principle of masking, where a louder signal covers a quieter signal of the same frequency. In this mode, the cutoff frequency dynamically tracks the low-frequency content of the music. The FREQUENCY control sets the frequency to which the filter will open up in the absence of low-frequency content. When dealing with noisy signals (e.g., from a record deck), the FREQUENCY control can be adjusted to eliminate hum or rumble. This technique involves a trade-off between noise reduction and some loss of low-frequency content. Using the steepest (24dB per octave) slope maximizes the retained low-frequency content. Discreet use of the RESONANCE control can introduce a small peak at the cutoff frequency, psychoacoustically enhancing the apparent bandwidth of the filtered signal. Higher resonant settings can make the filter's movement audible, creating unique effects when combined with higher FREQUENCY control settings. The Lo-Cut filter's sweep range, from ultrasonic to full audio bandwidth, allows for creative frequency-domain fading.
General| Brand | Trident |
|---|---|
| Model | 500 Series |
| Category | Recording Equipment |
| Language | English |
