User manual FURMAN RR-215

® GRAPHIC EQUALIZERS MODELS RR-215, RR-131, and RR-231 FEATURES l Three models: RR-215: Dual 15 Band Graphic Equalizer RR-131: Single 31 Band Graphic Equalizer RR-231: Dual 31 Band Graphic Equalizer 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 all inputs and outputs Ground lift switches Dual voltage switch (100/120 or 200/240 VAC) 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 (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. l l l l l l l l DESCRIPTION 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 an EQ 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 CONTROLS AND INDICATORS 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. 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. WARRANTY INFORMATION 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. Channels: Bands per Channel: Boost/Cut Range: Slider Travel: Input Connections: Impedance: Maximum Levels: Signal to Noise Ratio: Distortion: Frequency Response: High Pass Filter: Low Pass Filter: Dimensions (W X D X H): Weight: Power Requirements: Safety Agency Approvals: 3 0 1 1 0 RR-131: one; RR-215, RR-231: two RR-215: 15 (25, 40, 63, 100, 160, 250, 400, 630,1k, 1.6k, 2.5k, 4k, 6.3k, 10k, 16k) 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) ±6 dB or ±12 dB, switch selectable 20 mm with center detent Active balanced XLR and ¼" TRS; unbalanced RCA Input: 20 k balanced; 15 k unbalanced; Output: Less than 600 Input: +18 dBV; Output: +16 dBV 93 dB at 1 kHz .02% THD, 1 kHz, all sliders at center 20 Hz to 50 kHz, +0, -3 dB, all sliders at center RR-131, RR-231: 10 Hz To 250 Hz Variable; RR-215, 40 Hz fixed; 12 dB/octave RR-131, RR-231: 3 kHz To 50 kHz Variable; RR-215: 16 kHz fixed; 12 dB/octave RR-215, RR-131: 19" X 8.66" X 1.75"; RR-231: 19" X 8.66" X 3.5" RR-215, RR-131: 5.22 lbs (2.9 kg); RR-231: 9.36 lbs (5.2 kg) 100-120 VAC, 60 Hz, or 200-240 VAC, 50 Hz, switch selectable; 15 watts CE, TUV, EMC. Pending: NRTL 9 6 3 0 0 2 2 7 5 1 SPECIFICATIONS