Lowell EQ1 - Manual (Page 3)

Instruction Sheet
IS-EQ1
Issued: 1-20-14
Lowell Manufacturing Company 100 Integram Drive Pacific, Missouri 63069 U.S.A.
Call: 800-325-9660 Fax: 636-257-6606 Click: www.lowellmfg.com
3
EQ1 Block Diagram
EQ1 Technical Specifications
Sliders: (30) 20mm-travel center-detent controls, 1/3-Octave at ISO spacing from 25 Hz to 20 kHz
Filters: Constant-Q design to minimize interactions between adjacent bands
Range: + 12 dB or + 6 dB depending on the position of the front panel “RANGE” switch
Inputs: XLR and ¼” TRS phone plug, active 20 k W balanced or 10 kW unbalanced
Outputs: XLR and ¼” TRS phone plug, active 400 W balanced or 200 W unbalanced
Note: The XLR and ¼” TRS output connectors are wired in parallel (with no isolation).
Maximum Input: 20 dBu. Note: Only one input ( XLR or ¼” TRS) may be used at a time. The inputs do not sum.
Overall Gain with sliders centered: Off to +0 dB (unbalanced output) / Off to +6 dB (balanced output)
Filters: RFI filters included and Infrasonic (subsonic) filter 20 Hz 18 dB/octave Butterworth low-cut filter included.
Overload LED Threshold: 4 dB below clipping
Frequency Response: 20 Hz – 100 kHz, +0 dB/-3 dB
THD and Noise: 0.011% (+4 dBu, 20 Hz - 20 kHz BW) IM Distortion (SMPTE): 0.01% (+4 dBu, 60 Hz - 7 kHz, 4:1)
Signal-to-Noise Ratio (20 kHz noise bandwidth, unity gain, balanced):
+20 dBU output: 107 dB with sliders centered, 92 dB with sliders full boost, 104 dB with sliders full cut
+4 dBU output: 91 dB with sliders centered, 76 dB with sliders full boost, 88 dB with sliders full cut
Common Mode Rejection: 40 dB @ 1kHz
Universal Line Voltage: 100-240 VAC, 50/60 Hz
Chassis Construction: All steel
Chassis Size: 1.75" H X 19" W X 5.25" D (1U of rack space) Weight: 5 lb. (2.3 kg.)
Shipping Carton Size: 4.25" H X 20.3" W X 13.75" D Shipping Carton Weight: 8 lb. (3.6 kg)
+15 dBu unbalanced into 2 k
W/+13 dBu unbalanced into 600 W
Maximum Output: +20 dBu balanced into 2 k
W/+19 dBu balanced into 600 W
Note: 0 dBu = 0.775 Vrms (reference) dBu = 20 log (V
1
/ 0.775) where V
1
is the rms voltage to be converted to dBu.