Single Channel * L-C Active * Boost/Cut
One-Third Octave - 28 Band
High and Low-Pass Band Limiting
Ultimate in Performance and Reliability
L-C Active One-Third Octave Graphic Equalizers
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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.
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.
Number of Channels:
20Hz - 20kHz -2dB, typical with all 1/3 octave filters set at center.
Recommended Operating Level:
0dBu (0.775 volts rms).
Maximum Operating Level:
+18dBu into 600 ohms. +15dBu into 600 ohms using optional output transformer(s).
Better than -90dBu (re. 0.775 volts) at unity gain, 20kHz bandwidth. Worst Case.
Less than 0.02% THD at +18dBu into 600 ohms, 20kHz bandwidth.
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:
Filter Control Range:
±10dB at center frequency.
EQ In/Out Switch:
Front panel mounted. By-passes 1/3 octave filters only. Silent operation.
-3dB point adjustable from 20Hz -160Hz, 12dB/octave response.
-3dB point adjustable from 20kHz -5kHz, 12dB/octave response.
Input and Outputs 2 & 3; 0dB to -20dB. Continuously variable.
Active balanced differential. Better than 70dB common mode rejection. Plug-in isolation transformer available.
Single ended. Plug-in isolation transformer(s) available.
Number of Outputs:
<100 ohms. 300 ohms with optional output transformer(s)
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
Black painted brushed aluminum. White nomenclature. Matching metal security cover furnished.
Clear plastic security cover
Please specify when ordering.
4390 Input Transformer Plug-in.
4391 Single Output Transformer Plug-in.
4392 Dual Output Transformer Plug-in.
4393 Triple Output Transformer Plug-in.
Please contact White Instruments.
6, 12, 18 & 24dB/Octave for Bi-amp & Tri-amp.
Please Note: White Instruments reserves the right to improve our products and to change features and specifications without notice.