White 4400 Pair 1/3 Octave 28 Band EQ’s (Used)

 L-C Active * Boost/CutOne-Third Octave – 28 BandHigh and Low-Pass Band LimitingUltimate in Performance and Reliability Model 4400 L-C Active One-Third Octave Graphic Equalizers The Studio Standard : The Model 4400 is perhaps the highest performance and most reliable one-third octave graphic equalizers on the market today. It has been in continuous production by White Instruments for more than 15 years. The 4400 features 28 one-third octave L-C active filters on I.S.O. standard frequency centers from 31.5Hz through 16kHz. Each filter has a range of ±10dB. L-C Active Design: A pair of inductors/capacitors (L-C) are hand-tuned to create the resonant circuit of each filter. As passive devices they add no noise and are intrinsically reliable. Multiple Outputs: Three outputs are provided and can be used to distribute the signal or biamp/triamp when an accessory crossover network is inserted in its powered socket. A digital pink noise generator can also be used in the crossover socket to turn the equalizer into a highly reliable masking noise source. Other Features & Options: The 4400 includes adjustable high and low-pass filters; input and outputs 2 & 3 level attenuatiors; EQ in/out switch; sockets for optional input and output isolation transformers; and choice of a matching metal or clear plastic security cover. Let the specifications speak for themselves. Specifications: Model 4400 Number of Channels: One. Frequency Range: 20Hz – 20kHz -2dB, typical with all 1/3 octave filters set at center. Dynamic Range: 108dB Recommended Operating Level: 0dBu (0.775 volts rms). Maximum Operating Level: +18dBu into 600 ohms. +15dBu into 600 ohms using optional output transformer(s). Noise: Better than -90dBu (re. 0.775 volts) at unity gain, 20kHz bandwidth. Worst Case. Distortion: Less than 0.02% THD at +18dBu into 600 ohms, 20kHz bandwidth. Filter Type: L-C active, single-pole pair. Filter Control Centers: 28 one-third octave filters on I.S.O. standard frequency centers from 31.5Hz through 16kHz. Filter Center Frequency Tolerance: ±5%. Filter Controls: Rotary potentiometers. Filter Control Range: ±10dB at center frequency. EQ In/Out Switch: Front panel mounted. By-passes 1/3 octave filters only. Silent operation. High-Pass Filter: -3dB point adjustable from 20Hz -160Hz, 12dB/octave response. Low-Pass Filter: -3dB point adjustable from 20kHz -5kHz, 12dB/octave response. Level Adjustments: Input and Outputs 2 & 3; 0dB to -20dB. Continuously variable. Connectors: Barrier Strips. Input/Output Circuits: Input Active balanced differential. Better than 70dB common mode rejection. Plug-in isolation transformer available. Outputs Single ended. Plug-in isolation transformer(s) available. Input Impedance: ~100 kilohms. Number of Outputs: 3. Output Impedance: <100 ohms. 300 ohms with optional output transformer(s) Power Requirements: 115 /230 VAC, 50/50Hz, user selectable on rear panel, ~5.5W. Dimensions and Weight: 3.5″ by 19″ (rack mount 2RU) by 8″ 8.9cm by 48.3cm by 20.3cm 8 lbs. – 3.6kg