Channel and Graphic Equalizers

Feedback Prevention

When the overall gain of a sound system is increased, feedback will occur at frequencies where

the system response has peaks. Suppose the system has uneven frequency response like that shown in the following diagram.

The frequency at which feedback will occur when gain is increased is about 500Hz. In this case, feedback may be prevented by attenuating levels at 500Hz by 3dB to 5dB with an

equalizer. If the overall gain is again gradually increased, feedback will occur next at about

125Hz. It may be stopped by attenuating the levels 3dB to 5dB at that frequency. In this

procedure, sufficient gain in the sound system is obtained before feedback.

General Specifications

Frequency Response

 

+0dB, -0.5dB

50Hz to 15kHz

+0.5dB, -3dB

20Hz to 30 kHz

Total Harmonic Distortion

0.5% at +4dB*/600 ohms at 1kHz

Hum and Noise

(20Hz to 20kHz, input termination of 150 ohms, Input level switch at "BAL -60", Trim at "0", output termination of 600 ohms)

Equivalent Input Noise -124dB* (20Hz — 20kHz)

-127dB* (IHF-A weighted)

S/N

64dB; PROGRAM OUT

(PGM Fader and one Input Fader at nominal level)

64dB; FB OUT

(FB Fader and one FB control at nominal level)

Crosstalk

-60dB at 1kHz, input to output

Maximum Voltage Gain

84dB CH IN to PGM LINE OUT 84dB CH IN to FB LINE OUT

94dB CH IN to ECHO SEND 60dB CH IN to REC OUT

60dB CH IN to ACCESSORY SEND

44dB STEREO IN (AUX) to PGM LINE OUT 74dB STEREO IN (PHONO) to PGM LINE OUT 44dB AUX ECHO IN to PGM LINE OUT

24dB ACCESSORY RCV to PGM LINE OUT

10dB SUB IN to LINE OUT

Channel Equalizer (±15dB maximum)

LOW

100Hz

Shelving

LOW MID

300Hz

Peaking

HI-MID

3kHz

Peaking

HIGH

10kHz

Shelving

Graphic Equalizer (±12dB maximum)

Center Frequency

63Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz, 16kHz

Internal Echo Unit

Delay Time SHORT 12msec—40msec

LONG 40msec—140msec

Peak Indicator

LED turns on when the pre-fader, post EQ signal reaches 6 dB before clip.

Phantom Power

48V DC is applied to balanced input transformer for

powering condenser microphones

Meter ("0" = +4dB* output at LINE OUT)

2 pairs of fluorescent bargraph meter for PGM L, R and FB 1,

2.

AC Line Voltage

AC Mains 50 Hz or 60 Hz

Power Consumption

RX-208 44W

RX-212 49W

RX-216 54W

Finish

Black panel, rosewood trim

Dimensions (W×D×H)

RX-208

564 × 687 × 206 mm (22-1/4" × 27" × 8-1/8") RX-212

564 × 687 × 206 mm (22-1/4" × 27" × 8-1/8") RX-216

684 × 687 × 206 mm (26-7/8" × 27" × 8-1/8")

Weight

RX-208 21kg (46.3 lbs)

RX-212 22kg (48.5 lbs)

RX-216 26kg (57.3 lbs)

Accessory

Fuse

*0dB is referenced to 0.775V RMS

Specifications are subject to change without notice.

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Trane RX-212 instruction manual General Specifications