Furman Sound RR-215, RR-231, RR-131 User Manual
®
GRAPHIC EQUALIZERS
MODELS RR-215, RR-131, and RR-231
FEAFEA
TURESTURES
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● Three models:
RR-215RR-215
RR-215: Dual 15 Band Graphic Equalizer
RR-215RR-215
RR-131RR-131
RR-131: Single 31 Band Graphic Equalizer
RR-131RR-131
RR-231RR-231
RR-231: Dual 31 Band Graphic Equalizer
RR-231RR-231
● 20 mm sliders with center detents used throughout
● Output level matching controls with 0 to 10 dB range
● Bypass and Range buttons with LED indicators; Range
buttons allow ±6 dB or ±12 dB slider adjustment
● Low Pass and High Pass buttons (RR-215) or sweepable
controls (RR-131, RR-231)
● Clip LEDs indicate overload conditions
● Unbalanced RCA, as well as balanced 1/4" TRS phone
and
XLR connectors, for
● Ground lift switches
● Dual voltage switch (100/120 or 200/240 VAC)
DESCRIPTIONDESCRIPTION
DESCRIPTION
DESCRIPTIONDESCRIPTION
RackRider's newest line of graphic equalizers have the
features and performance you need for any sound
reinforcement, room equalization, or recording application.
The single-channel RR-131 and dual-channel RR-231
divide the audio frequency spectrum into 31 bands, each
spaced 1/3 of an octave apart, while the dual-channel
RR-215 divides the spectrum into 15 bands, each spaced 2/3
of an octave apart. The actual center frequencies chosen are
those designated as standards by the ISO. Each slider allows
all
inputs and outputs
an EQ adjustment of ±6 dB or ±12 dB, depending on the
setting of the Range switch.
All models are built using compact 20 mm sliders,
allowing a full set of 30 or 31 sliders to fit in only a single rack
space. Though small, the sliders are of high quality and have
a smooth, silky feel. They are center detented for quick,
reliable identification of the zero setting.
Because the exact EQ setting chosen may alter the
program’s overall loudness, Level controls are provided.
These are sliders which allow trimming the gain over a 10 dB
range. An LED Clip light glows if the audio signal has
exceeded the maximum output level (i.e., an overload
condition exists), in which case the Level slider can be
reduced to avoid distortion.
Pushbuttons are provided on each channel for Bypass,
allowing an instant comparison of the sound with EQ in or
out. A yellow LED glows when the EQ is bypassed.
All models feature extra control of extreme lows and
highs. The RR-215 has High Pass buttons which cut lows
below 40 Hz, and Low Pass buttons which cut highs above 16
kHz. The RR-131 and RR-231 provide adjustable controls for
High and Low Pass, allowing the cutoff frequencies to be set
anywhere from 10 to 250 Hz, and 3 to 50 kHz, respectively.
The High Pass function is particularly useful in avoiding
power-gobbling rumble in systems not designed to reproduce
extreme lows.
For ease of hookup, any of three types of connections
may be used for each input and output: XLR (balanced), 1/4"
TRS phone (balanced or unbalanced), and RCA
RackRider® products are designed and imported exclusively by:
Furman Sound, Inc. • 1997 South McDowell Blvd. • Petaluma, CA 94954, USA
Phone: (707) 763-1010 • Fax: (707) 763-1310 • Web: www .furmansound.com • E-mail: info@furmansound.com
Rear Views, RR-215, RR-131, RR-231
(unbalanced). The extra outputs may be used if, for example,
a signal split is needed to feed both a tape recorder and a PA
system.
CONTROLS AND INDICACONTROLS AND INDICA
CONTROLS AND INDICA
CONTROLS AND INDICACONTROLS AND INDICA
Power on-off
Range: Allows selection of ±6 dB or ±12 dB boost or cut.
Color-coded LED’s indicate the range selected.
Bypass: Toggles the EQ between IN and OUT (bypassed).
A yellow LED glows to indicate Bypass.
Low Pass Filter: Decreases the higher frequencies. Useful
in reducing hiss or sibilance. The filtering range is
continuously adjustable from 3 kHz up to 50 kHz.
High Pass Filter: Decreases the lower frequencies, to
combat rumble, footsteps, wind noise, etc. Continuously
adjustable from 10 Hz to 250 Hz.
Channels: RR-131: one; RR-215, RR-231: two
Bands per Channel: RR-215: 15 (25, 40, 63, 100, 160, 250, 400, 630,1k, 1.6k, 2.5k, 4k, 6.3k, 10k, 16k)
Boost/Cut Range: ±6 dB or ±12 dB, switch selectable
Slider Travel: 20 mm with center detent
Input Connections: Active balanced XLR and ¼" TRS; unbalanced RCA
Impedance: Input: 20 kΩ balanced; 15 kΩ unbalanced; Output: Less than 600 Ω
Maximum Levels: Input: +18 dBV; Output: +16 dBV
Signal to Noise Ratio: 93 dB at 1kHz
Distortion: .02% THD, 1 kHz, all sliders at center
Frequency Response: 20 Hz to 50 kHz, +0, -3 dB, all sliders at center
High Pass Filter: RR-131, RR-231: 10 Hz To 250 Hz Variable; RR-215, 40 Hz fixed; 12dB/octave
Low Pass Filter: RR-131, RR-231: 3 kHz To 50 kHz Variable; RR-215: 16 kHz fixed; 12dB/octave
Dimensions (W X D X H): RR-215, RR-131: 19" X 8.66" X 1.75"; RR-231: 19" X 8.66" X 3.5"
Weight: RR-215, RR-131: 5.22 lbs (2.9 kg); RR-231: 9.36 lbs (5.2 kg)
Power Requirements: 100-120 VAC, 60 Hz, or 200-240 VAC, 50 Hz, switch selectable; 15 watts
Safety Agency Approvals: CE, TUV, EMC. Pending: NRTL
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SPECIFICASPECIFICA
SPECIFICA
SPECIFICASPECIFICA
RR-131, RR-231: 31 (20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400,
500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k)
Level Control: This control may be used to compensate
for any changes in volume caused by the EQ settings.
Clip LED: Indicates a distortion-causing overload. Adjust
the Level control to compensate for clipping.
EQ Sliders: These sliders allow boost or cut of either ±6
dB or ±12 dB (depending on the setting of the Range switch)
over a narrow frequency band.
Ground Lift: Fights hum or buzz by separating the signal
and chassis grounds.
WW
ARRANTY INFORMAARRANTY INFORMA
W
ARRANTY INFORMA
WW
ARRANTY INFORMAARRANTY INFORMA
The RackRider RR-Series Graphic Equalizers are
protected by a limited ninety (90) day warranty covering
manufacturing defects. Warranty service is provided by
Furman at the address below.
TIONSTIONS
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3-0110 963002-2751
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