Rolls Req313 Manuale utente

REQ313

GRAPHIC EQUALIZER

Constant Q

OWNERS MANUAL

LIMITED WARRANTY

This product is warranted to the original consumer purchaser to be free from

defects in materials and workmanship under normal installation, use and service for a

period of one (1) year from the date of purchase as shown on the purchaser’s receipt.

The obligation of Rolls Corporation under this warranty shall be limited to repair

or replacement (at our option), during the warranty period of any part which proves

defective in material or workmanship under normal installation, use and service, provided

the product is returned to Rolls Corporation, TRANSPORTATION CHARGES PRE-

PAID. Products returned to us or to an authorized Service Center must be accompanied by

a copy of the purchase receipt. In the absence of such purchase receipt, the warranty

period shall be one (1) year from the date of manufacture.

This warranty shall be invalid if the product is damaged as a result of deface-

ment, misuse, abuse, neglect, accident, destruction or alteration of the serial number,

improper electrical voltages or currents, repair, alteration or maintenance by any person or

party other than our own service facility or an authorized Service Center, or any use

violative of instructions furnished by us.

This one-year warranty is in lieu of all expressed warranties, obligations or

liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR LIABILITIES,

INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MER-

CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL BE

LIMITED IN DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN

LIMITED WARRANTY. Some states do not allow limitations on how long an implied

warranty lasts, so the above limitation may not apply to you.

IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL, INCIDENTAL

OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY OTHER

WARRANTY, EXPRESSED OR IMPLIED, WHATSOEVER. Some states do not allow

the exclusion or limitation of special, incidental or consequential damages so the above

limitation or exclusion may not apply to you. This warranty gives you specific legal

rights, and you may also have other rights which vary from state to state.

ROLLS CORPORATION

SALT LAKE CITY, UTAH

4/01

CONSTANT Q

REQ313

31 BAND

GRAPHIC

EQUALIZER

INTRODUCTION

The ROLLS REQ313 graphic equalizer is intended for room equalizing or sound

shaping and the approximate frequency response curve can be seen graphically

by the settings of the frequency controls.Recording and broadcasting studios,

sound contractors and musicians will appreciate the low noise, straightforward

design, and versatile signal control of the REQ series.

INSPECTION

1.Unpack and inspect the REQ313 box and package.

If obvious physical damage is noticed, contact the carrier immediately to make a

damage claim.We suggest saving the shipping carton and packing materials for

safely transporting the unit in the future.

2.Please complete theWarranty Registration Card and return it to the factory.

TABLE OF CONTENTS

1. Introduction

Inspection

Table of Contents

2. Description

Front Panel

Rear Panel

3. Operation, Installation

4. Example diagram

5. Schematic

6. Specifications

Back Cover: Warranty

SPECIFICATIONS

Equalizer

Bands: 31

Frequency Response: 20Hz - 20kHz

Accuracy: 5% Center Frequency

Range: +6dB or +12 dB (Switch selectable)

Inputs Type: Active Balanced/Unbalanced

Connectors: XLR, 1/4” TRS

Impedance: 12k Ohms

Maximum Level +22 dB (Balanced), +15dB (Unbalanced)

Outputs Type: Electronically Balanced

Connectors: XLR, 1/4” TRS

Impedance: 600 Ohms

Maximum Level: +22 dB (Balanced), +15dB (Unbalanced)

RFI Filters: Yes

Passive Bypass Switches: Yes

Overload LED Threshold: 3dB below clipping

Low Cut Filter: 10 - 250Hz, 12dB/Oct.

Frequency Response: 20Hz - 20kHz, +0.5dB

THD + Noise: 0.01% (20Hz - 40kHz)

S/N Ratio: 110dB below Max level (A weighted)

Equivalent Input Noise: -95dB (20kHz noise bandwidth)

Dimensions: 3.5”H x 19”W x 8.5”D

1 6

DESCRIPTION

FRONT PANEL

Power Switch:To turn the REQ313 on or off, press the upper or

lower portion of this button.

NOTE: ALWAYS TURN THE EQUALIZER ON BEFORE THE

POWER AMPLIFIER IS TURNED ON, AND TURN THE EQUAL-

IZER OFF AFTER THE POWER AMPLIFER IS TURNED OFF.

Filter Level Controls; Each of these sliders control the output level

of each of the 31 bandpass filters. Center detent position is

grounded for guaranteed flat response.

Filter Range Switch & Indicators:The gain range of the filter sliders

is switchable (as a group) from +/-6dB to +/-12dB. At 6dB the

green LED will light, at 12dB the yellow LED will light.

Bypass Switch & Indicator:When the red LED is lit, the equalizer

circuitry is bypassed.Use this switch to compare equalized and

unequalized material, or to bypass the EQ in the event of power

loss.

Overload Indicator:This LED lights if any section of the EQ circuitry

is within 3dB of clipping. Occasional blinking of this LED is accept-

able.

Low-Cut Frequency Control:This control determines the roll-off

frequency of the High-Pass Filter.This roll-off frequency can be

adjusted from 10Hz to 250Hz.

High-Cut Frequency Control:This control determines the roll-off

frequency of the Low-Pass Filer.This roll-off frequency can be

adjusted from 3kHz to 40kHz.

REAR PANEL

The rear panel contains the XLR and 1/4” input and output jacks.

Connect the power cable to a properly grounded AC outlet.

Fuse Holder: This receptacle contains an AC primary fuse. Always

replace this fuse with the same type and rating of fuse.If the fuse is

blowing out consistantly after each replacement, the unit is in need

of service.

SCHEMATIC

5 2

OPERATION AND APPLICATIONS

The REQ equalizers are useful signal processing tools where

precise frequency control is needed across the audio spectrum.

When used with an analyzer,the REQ units may be used to tune an

acoustical environment to avoid ringing (feedback), increase clarity,

and flatten the overall frequency response. Insert the graphic equal-

izer between the signal source and the power amplifier or cross-

over.Adjust the level and equalization as required to yield the

desired system response.The Low Cut and High Cut filters are

used to band-limit the frequency response to increase clarity and

reduce noise.

The equalization filters in the REQ313 are constant bandwidth

(constant Q).The bandwidth of each individual filter is guaranteed

to be narrow enough to prevent unwarranted interaction between

filters, yet wide enough to produce exactly the type of correction

curve demanded by even the most unusual acoustic surroundings.

INSTALLATION

Your REQ313 may be installed in a standard 19” rack or placed in

any dry, well ventilated area.The 1/4” connectors are balanced with

the tip being positive (+) and the ring negative (-), or will assume an

unbalanced state with unbalanced (TS) connectors.The XLR con-

nectors are pin 2 positive (+).

EXAMPLE

AUX 2

RETURN

0 10

AUX 1

RETURN/

TAPE IN LEVEL

0 10

HEADPHONE LEVEL

0 10

LEFT RIGHT

+20

+14

-10

-15

-20

-30

+17

-4

-13

HEADPHONE

OUTPUT

AUX 1

0 10

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

BAL

11/12

+20

+14

-10

-15

-20

-30

AUX 1

0 10

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

BAL

9/10

+20

+14

-10

-15

-20

-30

AUX 1

0 10

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

BAL

7/8

+20

+14

-10

-15

-20

-30

AUX 1

0 10 AUX 1

0 10

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

BAL

5/6

+20

+14

-10

-15

-20

-30

AUX 1

0 10

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

PAN

+20

+14

-10

-15

-20

-30

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

PAN

+20

+14

-10

-15

-20

-30

AUX 1

0 10

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

PAN

+20

+14

-10

-15

-20

-30

AUX 1

0 10

AUX 2

0 10

LOW

-15 +15

2.5 K

MID

-15 +15

12.5 k

HIGH

-15 +15

L R

PAN

+20

+14

-10

-15

-20

-30

TAPE

OUT TAPE

TRIM

LINE

INSERT

MIC 1

INSERTINSERT

INSERT

LINELINELINE

TRIM

TRIMTRIMTRIMTRIM

TRIMTRIM

PHANTOM POWER LEFT

RIGHT

LEFT

RIGHT

LEFT

RIGHT

LEFT

RIGHT

RIGHT OUT AUX 2

RET. LEFT

LEFT OUT AUX 2

RET. RIGHT

AUX 1

RET. RIGHT

AUX 1

RET. LEFT

AUX 1

OUT

AUX 2

OUT

MIC 2

MIC 3MIC 4MIC 5/6MIC 7/8MIC 9/10MIC 11/12

+48V

OFF

+10

+60

+10

+60

+10

+60

+10

+60

+10

+60

+10

+60

+10

+60

+10

+60

CORPORATION

MODEL REQ313

WARNING:

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE BACK.

NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO

QUALIFIED SERVICE PERSONNEL.

RISQUE DE CHOC - NE PAS ENLEVER

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

VOLUME 2

OWER

MPLIFIER RA200

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