White Instruments 4828 Graphic Equalizer made in USA

Very useful graphic EQ. Technical info from White Instruments below. Can be great for room tuning, can also be a useful mono EQ in a channel strip recording or mixing. This one's in great shape, the only issue is the slider on the low pass broke off. It can be manipulated with a small flathead screwdriver or some kind of poker tool. Otherwise, great functioning Equalizer, made in America quality.

Will ship safely and package well, please don't hesitate with any questions.

Features + Economy:
The Model 4828 is a 28-band, R-C active graphic equalizer featuring a level control with up to 20dB gain; EQ in/out switch; adjustable high and low-pass filters; and 7 LED bargraph headroom indicator. The filter controls are 60mm slide faders with center detents and dust shields. 

28 One-Third Octave Filters
31.5Hz - 16kHz:
On I.S.O. standard frequency centers. Minimum phase type, ±12dB range. Close center frequency tolerances, ±5%. Adjacent filters sum with less than 0.125dB ripple. The low noise specification is not degraded with adjustment of the filters. 

60mm Linear Controls with Center Detents and Dust Shields:
The longest control available for a 3.5 in. chassis. Provides greater EQ adjustment resolution. 

EQ In/Out Switch:
Operates silently for convenient comparison. 

High and Low-Pass Filters:
Band-limit unwanted subsonic and ultrasonic noise. Continuously adjustable, 12dB/octave high-pass 12Hz - 240Hz and low-pass 40kHz - 4kHz 

High Current, Balanced, Differential Output Stage:
Will drive 600 ohms to +21dBu while maintaining 0.02% THD. 

Number of Channels:
One. 

Frequency Range:
20Hz (-1dB) through 20kHz (-0.5dB), typical with all 1/3 octave filters set at center detents. 

Dynamic Range:
109dB 

Recommended Operating Level:
0dBu (0.775 volts rms). 

Maximum Operating Level:
+21dBu into 600 ohms. 

Noise:
Better than -90dBu (re. 0.775 volts) at unity gain, 20kHz bandwidth. Worst Case. 

Distortion:
Less than 0.02% THD into 600 ohms, 20kHz bandwidth. 

Filter Type:
R-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:
60mm linear potentiometers with center detents and integral dust covers. 

Filter Control Range:
±12dB at center frequency, Detent at 0dB (±0.5dB). 

EQ In/Out Switch:
Front panel mounted. By-passes 1/3 octave filters only. Silent operation.

High-Pass Filter:
-3dB point adjustable from 12Hz -240Hz, 12dB/octave response. 

Low-Pass Filter: 
-3dB point adjustable from 40kHz -4kHz, 12dB/octave response. 

Gain:
0dB to +20dB. Continuously variable. 

Headroom Indicator:
7 LED bargraph display, 3dB resolution. 

Connectors:
Latching XLR-3 with chassis-grounded shells. 
Redundant 1/4" TRS. 

Input/Output Circuits:
Active servo-balanced differential. Can operate unbalanced with no change in dynamic range. 

Common Mode Rejection:
Greater than 85dB at or below 1kHz and greater than 65dB at 10kHz. 

Input Impedance:
50 kilohms, balanced. 25 kilohms, unbalanced. 

Output Impedance:
102 ohms, balanced. 51 ohms, unbalanced. 

Power Requirements:
90 - 130 / 180 - 260 VAC, 50/50Hz, user selectable on rear panel, 15W. Fuse: 250mA, slow-blow, 1.25". 

Mute Relay:
Mutes audio on power-up and power-down. 

Dimensions and Weight:
3.5" by 19" (rack mount 2RU) by 9.2" 
8.9cm by 48.3cm by 23.4cm 
7 lbs. - 3.2kg 

Finish:
Black painted brushed aluminum. White nomenclature.