User manual PRESONUS DEQ 624 DATASHEET

[. . . ] Additional functions include Hi-Q select, which reduces the effect of any center frequency being cut or boosted on adjacent frequencies. Range controls offer a choice of +6/-6, +12/-12 or +12/-24dB settings and a hard bypass switch is also provided. The DEQ624 also features AHC ­ Adaptive Hum Cancellation ­ which is very effective in minimizing unwanted 50/60Hz system hum commonly caused by electrical grounding problems. [. . . ] There is a separate Gain knob that is a 0db detent potentiometer that provides for a 20dB cut or boost for gain make-up after the limiter. Multi Range Cut/Boost The Range button allows the user to choose between three different fader resolutions or `range' of operation; +6/-6dB, +12/-12dB or +12/-24dB. LED's provide a visual reference for which Range is selected. Since many rooms need problematic frequencies `cut', having the ability to cut a frequency by up to 24dB is a very worthwhile tool. Narrow Q Select The DEQ624 provides a Narrow-Q Select that gives the user the ability to essentially `notchout' a problem frequency with a very narrow bandwidth, leaving adjacent frequencies unaffected by drastic cuts. An LED below each frequency gives the user a visual reference on which frequencies the Narrow-Q is selected. Channel A Master The DEQ624's powerful DSP engine allows PreSonus to program capabilities into the unit that truly set it apart from any other graphic equalizer. A lighted button labeled Channel A Master provides a copy function to Channel B. Any settings on channel A are mirrored by channel B. This provides for a very quick set up of stereo systems in live sound reinforcement scenarios. Security / Store-Preset The Store/Security button gives the end user the ability to lock out the front panel controls after the desired settings have been achieved with a user defined code. This makes the DEQ624 very valuable as a permanently installed system equalizer. The Preset Button allows for the storage and recall of up to four different settings. This feature opens up a whole new way of thinking about graphic equalizers. For instance for a musical group that plays a `circuit' of clubs or rooms, each room's corrective EQ can be stored to a preset and recalled in an instant. Many times a room's corrective EQ has to be changed from when it is empty at sound check to when it fills with people for the performance. [. . . ] The audio in this frequency range is virtually unaffected by AHC. Connectors and Power The DEQ624 back panel is totally analog: balanced XLR, TRS and Terminal Strips provide the connections in and out of the unit. The power supply is internally mounted. DEQ624 Controls Close-Up DEQ624 Signal Path BARRIER STRIP BARRIER STRIP RELAY JACK-TRS ANALOG AUDIO JACK-TRS AHC ON/OFF XLR FEMALE BYPASS DSP DIGITAL AUDIO Adaptive ADC XLR FEMALE Hum Cancellation DSP 1/3 octave Eq. [. . . ]