Trane RX-212 - Manual (Page 14)

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 Ч 687 Ч 206 mm (22-1/4" Ч 27" Ч 8-1/8")
RX-212
564 Ч 687 Ч 206 mm (22-1/4" Ч 27" Ч 8-1/8")
RX-216
684 Ч 687 Ч 206 mm (26-7/8" Ч 27" Ч 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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