Sound Performance Lab PQ Mastering Equalizer Motorized potentiometers, Amplitude, Frequency

Key Functions

Motorized potentiometers

All of the PQ‘s potentiometers are motorized to accommodate the channel link and unit link functions. The adjustment range of the Frequency, Bandwidth and Amplitude potentiometers is evenly dispersed throughout the 300-degree movement area, ensuring smooth and continuous adjustments and extreme operational security. The high resolution of each respective value (e.g. Q from 0.1-3.7, evenly distributed over 300 degrees) allows extremely precise adjustments as well as accurate repeat- ability.

We intentionally avoided unnecessary or confusing functions such as frequency range switching or frequency, bandwidth or amplitude multiplicators.

Important note: The motorized potentiometers should NEVER be manually moved or held while being controlled by the motors, e.g. in channel or unit link mode.

Amplitude

Amplitude settings are freely adjustable from -11.5 to + 11.5 dB. The lower range between 0 and 2.5 dB offers extremely high resolution, allowing delicate adjust- ments with maximum precision.

Frequency

Each channel provides five fully parametric frequency bands covering 10 Hz to 28 kHz. Each band overlaps its neighbor by one octave and can be independently acti- vated and deactivated.

The following frequency bands are provided:

LF (Low Frequencies):	10 Hz - 235 Hz
LMF (Low Mid Frequencies):	35 Hz - 720 Hz
MF (Mid Frequencies):	330 Hz - 7.1 kHz
HMF (High Mid Frequencies):	670 Hz - 16 kHz
HF (High Frequencies):	1.2 kHz - 28 kHz

Bandwidth

Bandwidth is adjustable between 0.1 and 3.7 Q in proportional Q mode and between

0.9and 15 Q in constant Q mode. The extremely high maximum bandwidth in constant Q mode enables tight, selective control in precision applications.

Illuminated keys

The PQ features illuminated keys that illuminate brightly when activated. The final software version will provide dimly lit keys (25% brightness) when deactivated for ease and security of operation. The current software version (240H) switches illumi- nation off when keys are deactivated.

LF, LMF, MF, HMF and HF keys

These keys activate (key lamps lit) or deactivate (lamps off) the 10 filter bands.

Con. Q key

This key switches the 10 filter bands between proportional Q mode (lamps off) and constant Q mode (lamps off).

Please note: It is impossible to activate the “ON” for a specific band and the Con. Q button simultaneously. Please always press one of these buttons after another.

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