User manual BBE SOUND EQA215

[. . . ] Turn off power amplifier first, then power-down peripheral devices. 1 GENERAL DESCRIPTION EQA231 is a two channel 31 band 1/3 octave graphic equalizer. The EQA231 incorporates Constant-Q circuitry with a 5% center frequency accuracy. [. . . ] Bypass Switch When it is the "IN MOST" position, equalizer is bypassed. HPF Frequency Control (EQA 231 and EQA131) To cut down unwanted signal, this control determines the roll-off frequency of the High-Pass Filter. The roll-off frequency can be adjusted from 10Hz to 250Hz by turning this knob. Because of its high roll-off slope, the HPF can be efficiently used to cut down the "HUM" from preceding instruments, or to prevent low-frequency resonance. LPF Frequency Control (EQA 231 and EQA131) To cut down unwanted signal this control determines the roll-off frequency of the Low-pass filter. The roll-off frequency can be adjusted from 3KHz to 40KHz by turning the knob. Because of its high roll-off slope, this LPF can be efficiently used to cut down the highfrequency noise from preceding instruments, or especially used to roll-off high-frequency sound to obtain a more natural sound in acoustic situations. 7. Unity gain can be set by turning this knob its center detent position. 8. Bypass Indicator When the green LED is illuminated this indicates that the unit or channel is in the bypass mode. Signal is routed directly from the input to the output without passing through any circuit (often referred to as "hard-wire bypass"). 5 Specifications Equalizer: EQA231 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/3-Octave ISO Spacing From 20Hz to 20KHz EQA131 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/3-Octave ISO Spacing From 20Hz to 20KHz EQA215 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2/3-Octave ISO Spacing From 25Hz to 16KHz Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Constant Q (Accuracy 5% Center Frequency) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6dB or ±12dB (Switch Selectable) Inputs: Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . XLR 3Pin, 1/4" TRS Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . 20K Ohms Bal; 15K Ohms Maximum Level . . . . . . . . . . . . . . . . . . . . . +24dBu (Bal) +18dBu (Unbal) Outputs: Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . XLR-3Pin, 1/4" TRS Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . Typ. <150 Ohms Maximum Level . . . . . . . . . . . . . . . . . . . . . +24dB Bal; +18dB Unbal (2K Ohms) +18dB Bal; +12dB Unbal (600 Ohms) Overall Gain Range . . . . . . . . . . . . . . . . . . Off to 3dB ( Unbal Out ) Sliders Centered Off to 9dB ( Bal Out ) Sliders Centered PEAK LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Threshold 5dB ( Below Clipping) Frequency Response . . . . . . . . . . . . . . . 20~20KHz +0, -2dB HPF Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10~250Hz, 12dB/Oct LPF Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3K~40KHz, 12dB/Oct THD + Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 05% (1KHz +3dB) Signal-to-Noise Ratio . . . . . . . . . . . . . . . 96dB below Max. Level (A weighting) Equivalent Input Noise . . . . . . . . . . . . -81dB (0dB=0. 775V) Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 95~130VAC, 50/60Hz 190~250VAC, 50Hz EQA231-- Input AC Power: 12W EQA131-- Input AC Power: 7W EQA215-- Input AC Power: 7W Unit: Construction . . . . . . . . . . . . . . . . . . . . . . . . All Steel Size: . . . . . . EQA231 . . . . . . . . . . . . . . . . . . 3. 5"H x 19''W x 8. 5"D ( 2U ) ( 8. 9cm x 48. 3cm x 21. 6cm) EQA131/EQA215 . . . . . . 1. 75"H x 19''W x 8. 5"D ( 1U ) ( 4. 45cm 48. 3cm x 21. 6cm) Weight: EQA231 . . . . . . . . . . . . . . . . . . 9 Ibs ( 4. 1Kg) EQA131/EQA215 . . . . . . 4. 5 Ibs( 2. 05Kg) 6 Service We recommend that if at all possible, a BBE GRAPHIC EQUALIZER which requires service be sent to our facility in Huntington Beach, California. We request that a "RETURN AUTHORIZATION" be issued by the dealer from whom you purchased the unit. directly at (714) 897-6766, extension 116 to obtain a "RETURN AUTHORIZATION". [. . . ] There are no user replaceable parts and the unit should not be opened for any reason unless you are a qualified technician. Calibration should be performed if parts are replaced or if a performance check-out indicates a problem with calibration. [. . . ]