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REQ215 Owner's Manual

Keith Harris
Updated

Dual 15 Band 1/3 Octave Graphic Equalizer w/ Sub Output

 

Important Safety Instructions

A standard electrical safety warning label enclosed in a rounded rectangular border: Left Icon: A black triangle containing a white lightning bolt symbol indicating high-voltage electrical hazard. Center Text Box: A central box with a black top banner reading "CAUTION" in white uppercase text. The white lower box reads "RISK OF ELECTRIC SHOCK. DO NOT OPEN" in black uppercase text. Right Icon: A black triangle containing a white exclamation point symbol indicating a general safety hazard alert.
  • To reduce risk of electric shock, never open the unit. There are no user serviceable parts, refer service to the Rockville service center.
  • Do not expose this unit to any kind of moisture.
  • Please ensure that the unit is situated in a properly ventilated area.
  • Make sure the unit is placed on a level and stable surface.

 

Functions

Front Panel:

A technical line drawing depicting the front faceplate of the Rockville REQ231 dual 31-band graphic equalizer with numbered callouts from 1 to 8:1: Rack Mount Ear: Mounting hole positioned on the far-left edge of the faceplate bracket.2: AUDIO IN/OUT Button: Push-button switch for bypassing or engaging the equalizer audio processing circuit.3: I/O METER IN/OUT Button & LED Level Display: Push-button toggle for the level meter alongside a horizontal LED level meter ranging from -18dB to CLIP.4: INPUT Gain Knob: Rotary gain control dial ranging from -12dB to +12dB.5: LOW CUT Knob: Rotary high-pass filter frequency control dial (10 Hz to 400 Hz).6: HIGH CUT Knob: Rotary low-pass filter frequency control dial (2.5 kHz to 30 kHz).7: RANGE Button: Push-button switch to select the equalizer slider boost/cut range ($\pm 6\text{ dB}$ or $\pm 12\text{ dB}$).8: 31-Band Equalizer Sliders: Dual identical channels (CHANNEL 1 on top, CHANNEL 2 on bottom), each containing 31 vertical frequency adjustment faders spanning 1/3-octave bands from 20 Hz to 20 kHz.
  1. Rack ears: allows for unit rack mount using four attaching screws and washers (not included).
  2. Power switch
  3. Power-on LED indicator
  4. Equalization sliders: cut or boost corresponding frequencies by ±12dB.
  5. Level meter LEDs: indicate the input/output levels from –12dB to +17dB.
  6. Level control: The level control can attenuate or boost the signal by up to 12dB. 0dB is normalized at 12 o’clock. Turn the knob counter-clockwise for up to 12dB of attenuation or clockwise for up to 12dB of gain.
  7. Bypass switch: engage this switch and the input signal will bypass all features except the LOW-CUT FILTER. The signal is routed from INPUT though the low-cut filter to the channel’s output. Bypass is indicated by the LED located above the switch.
  8. Low-Cut Filter switch: use this switch to activate the low-cut filter which will attenuate frequencies below 80Hz. Frequency roll-off is 24dB per octave. Low-cut filter is indicated by the LED located above the switch.

 

Rear Panel:

A technical schematic line drawing showing the rear panel connection hub of the Rockville REQ231 graphic equalizer, with numbered callouts from 1 to 8:1: Power Switch: Rocker-style power switch labeled "POWER" with ON (I) and OFF (O) indicators.2: DC 12V / 1.5A Input: Circular power supply input jack located directly to the right of two safety caution labels.3: X-OVER FREQ Control Knob: Rotary frequency adjustment dial for the subwoofer output, adjustable from 30 Hz to 200 Hz.4: SUB OUT Port: 3-pin male XLR subwoofer output jack.5: Balanced XLR Input Ports: 3-pin female XLR input connectors (shown for CHANNEL 2 and CHANNEL 1).6: 1/4" TRS Input Jacks: 1/4-inch TRS balanced/unbalanced audio input jacks. 7: Balanced XLR Output Ports: 3-pin male XLR output connectors (shown for CHANNEL 2 and CHANNEL 1).8: 1/4" TRS Output Jacks: 1/4-inch TRS audio output jacks.
  1. Balanced XLR Input
  2. Balanced 1/4˝ TRS Input
  3. Balanced XLR Output
  4. Balanced 1/4˝ TRS Input

 

A technical line drawing depicting a partial rear panel layout of the Rockville REQ215 graphic equalizer with callout labels numbered 5, 6, and 7: 5: SUB OUT Port: A 3-pin male XLR subwoofer output jack on the far-left side. 6: X-OVER FREQ Control Knob: A rotary crossover frequency dial located next to the subwoofer output, with frequency markings ranging from 30 Hz to 200 Hz. 7: POWER Input Jack: A circular power supply port labeled "DC 12V/1A" located on the far-right side beneath the "POWER" heading, to the right of the central Rockville REQ215 logo.
  1. XLR Subwoofer Output
  2. Crossover Frequency control: 30Hz – 200Hz: Set this to the desired frequency and it will play everything below that frequency.
  3. DC 12V Power Input

 

Features/Specifications

  • Dual channel (15 bands per channel)
  • 80Hz 24dB/Octave
  • 2/3 octave filter sets
  • 25Hz to 16kHz effective equalization range
  • Constant Q filters
  • Output level LEDs (-12 to +17dB)
  • Low Cut Filter switch with Status LED
  • XLR inputs and outputs for balanced operation
  • Bypass switch with status LED
  • Subwoofer out
  • Subwoofer X-Over Freq (30Hz – 200Hz)
  • Connectors: balanced XLR & TRS inputs and outputs
  • Frequency Centers: 31.5Hz, 40Hz, 63Hz, 100Hz,160Hz, 250Hz, 400Hz, 500Hz, 630Hz, 800Hz,1kHz, 2kHz, 4kHz, 8kHz, 16kHz
  • Input Impedance: 20k ohms
  • Output Impedance: 1.5k ohms
  • Maximum Output Level: 11 VAC
  • Level Control: ±12dB
  • Signal to Noise: 90dB
  • Distortion: 0.03%
  • 100-240V Worldwide Voltage Power Adaptor

 

 

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