EQ 31FX - Graphic equalizer PEAVEY - Free user manual and instructions

USER MANUAL EQ 31FX PEAVEY

31 Band Professional Graphic Equalizer

Intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.

CAUTION: Risk of electrical shock — DO NOT OPEN!

CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside. Refer servicing to qualified service personnel.

WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this appliance, read the operating guide for further warnings.

Congratulations on purchasing the EQ™ 31FX! With its introduction, Peavey engineers have taken graphic equalizers to the next level. The EQ™ 31FX offers 31 bands of 1/3 octave filters featuring superior constant "Q" devices. LED indicators are located in the slider of the frequency bands to identify the presence of a high energy signal (usually feedback). This sophisticated feedback detector system will allow you to quickly identify and remove feedback. It works like this: When the feedback detection circuit detects the frequency band with the most energy, it causes the LED in the slider of the associated frequency band to illuminate. By moving the fader downward for that band, the likelihood of feedback is reduced/eliminated. Most use the EQ 31FX in one of two ways: 1. To catch and reduce/eliminate feedback "on-the-fly" during a performance. 2. To determine frequency bands that are susceptible to feedback BEFORE the performance, and eliminating them in advance.

After the system is set up, bring up the microphone levels slowly. As they start to feed back, note the LED activity on the EQ 31FX feedback bands. Move the faders to decrease the "identified" bands. Now you have eliminated a high percentage of potential feedback problems, before the performance even begins! Note: It is not uncommon for feedback to be active over several frequency bands. Also, go easy when making fader adjustments since extreme movements will affect your performance and be counterproductive.

OPERATION NOTE

This equalizer is designed to provide room equalization, feedback control and system tone control. No amount of equalization will correct an acoustically bad room/mic/speaker arrangement or completely correct the response of a poor loudspeaker. Always begin with all sliders in the "0" position and avoid excessively cutting large segments of the audio passband, which would limit the system's dynamic range. Exercise caution when attempting to boost equalization below cut-off of the speaker system. Typical sound reinforcement enclosures are not designed for 20 Hz performance and transducer damage could result.

FRONT PANEL

FRONT PANEL FEATURES:

BYPASS SWITCH (1)

In Bypass mode (switch in), the input signal is routed directly to the output and is unaffected by all front panel controls except the low and high cut filters.

BYPASS LED (2)

This LED will illuminate when the Bypass switch is in the "in" position, indicating that the EQ and

gain controls are bypassed.

LOW CUT (3)

A high pass filter, continuously variable from 5Hz to 200Hz . Low frequency roll-off is at 12 dB per octave. Adjust this control to approximate low frequency cut-off of speaker system.

HIGH CUT (4)

A low pass filter, continuously variable from 5kHz to 35kHz . High frequency roll-off is at 12 dB per octave. Adjust this control slightly above high frequency system limitation.

LED LEVEL METER (5)

This multicolored LED ladder indicates output level.

GAIN (6)

Calibrated control for regulating overall gain of the equalizer section. Unity gain throughout the signal chain may be maintained by recovering lost signal at this point. Example: Assume the equalization process has introduced a signal loss of -6 dB by negative (-) adjustment of the EQ section. The gain should then be adjusted to +6 to maintain unity gain through the equalizer.

EQUALIZER SECTION (7)

31 bands of 1/3 octave filters. The filters are constant "Q" devices, located at ISO center frequencies. Effective equalization range is from 20Hz to 20kHz . Maximum cut or boost per frequency is 15dB .

AUTOMATIC FEEDBACK LOCATING LEDs (8)

When feedback occurs, the LED of the frequency band that is feeding back will illuminate indicating feedback in that band. The LED will remain illuminated for a few seconds even after the feedback is gone. This is to allow you to see where the feedback is if the feedback goes away before any correction is made. If there is no feedback occurring, the LED of the frequency band with the most energy in it will illuminate. Just because the LED is illuminated does not mean that there is feedback occurring. For best performance of the automatic feedback locating system, use an input signal of 0 dB (1V RMS).

POWER SWITCH (9)

REAR PANEL

Used to turn AC mains power on or off.

INPUT XLR (1)

A three-pin female XLR jack is provided for electronically balanced input termination (pin 2 positive, pin 3 negative).

INPUT 1/4" (2)

1/4" tip-ring-sleeve (stereo) jack provides balanced input when used with stereo (TRS) 1/4" plugs and 2-conductor shielded cables. When used with a mono 1/4" phone plug, the input is unbalanced.

OUTPUT XLR (3)

A transformer balanced, male XLR output provides line-balancing to other pieces of audio equipment (power amps, etc.) Balanced output is recommended for rejection of hum, noise and outside interference (pin 2 positive, pin 3 negative).

OUTPUT 1/4" (4)

1/4" phone jack is provided for unbalanced output termination.

LINE CORD (120V Products only) (5)

We have incorporated a 2-wire line (mains) cable for power on the EQ 31FX.

Power requirements:

Domestic: 120VAC / 60 Hz / 20 W.

Export: 230VAC / 50/60 Hz / 20 W.

NOTE: CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT,

EQ 31FX Application:

Mono send from Mixer to external

EQ/Power Amp combination.

SPECIFICATIONS

Frequency Response:

+/- 1 dB 20 Hz to 20 kHz

Distortion:

.005% 20 Hz-20 kHz

Input Impedance:

Balanced 20k Ohms (Equal impedance to ground)

Output Impedance:

330 Ohms

Maximum Input Level:

+21 dBu (8.6 V RMS)

Maximum Output Level:

+27 dBu (17 V RMS)

Nominal Input Level:

0 dBV (1 V RMS)

Nominal Output Level:

0 dBV (1 V RMS)

Input Headroom:

Nominal 21 dBu

Output Headroom:

27 dBu

Output Noise:

EQ in bypass: -101 dBV

EQ in, all flat: -95 dBV

Filter Frequencies:

20, 25, 32, 40, 50, 63, 80, 100, 125, 160,

200, 250, 315, 400, 500, 630, 800, 1 k,

1.25 k, 1.6 k, 2 k, 2.5 k, 3.15 k, 4 k, 5 k,

6.3 k, 8 k, 10 k, 12.5 k, 16 k, and 20 kHz

Filter Q:

4.77

Maximum Boost and Cut Filter:

+/- 15 dB

Maximum Boost and Cut Gain (WideBand Gain):

+/- 15 dB

Low Cut Filter:

12 dB Per Octave

Frequency:

Min: 5 Hz

Max: 200 Hz

High Cut Filter:

12 dB Per Octave

Frequency:

Min: 5 kHz

Max: 35 kHz

All specifications are typical unless otherwise noted. 0 dBV=1 Volt. All specifications are referenced to nominal output level (0 dBV) unless otherwise stated. All measurements are wideband 20 Hz to 20 kHz unless otherwise stated. NOTE: All specs measured at 1V RMS input and unbalanced output. All sliders at mid position, all switches out unless otherwise noted. Due to our efforts for constant improvement, features and specifications listed herein are subject to change without notice.

ESPÁÑOL

+/- 1 dB 20 Hz to 20 kHz

Distorsion:

.005% 20 Hz-20 kHz

Impedance d'entrée:

+/- 1 dB 20 Hz to 20 kHz

Verzerrung:

.005% 20 Hz-20 kHz

Eingangs-Impedanz:

Balanced 20k Ohms (Equal impedance to ground)

Ausgangs-Impedanz:

330 Ohms

EQ in bypass: -101 dBV

EQ in, all flat: -95 dBV

Filterfrequencies:

20, 25, 32, 40, 50, 63, 80, 100, 125, 160,

200, 250, 315, 400, 500, 630, 800, 1 k,

1.25 k, 1.6 k, 2 k, 2.5 k, 3.15 k, 4 k, 5 k,

6.3 k, 8 k, 10 k, 12.5 k, 16 k, and 20 kHz

Filter Güte (Q)

4.77

If this product contains tubes or meters, Peavey warrants the tubes or meters contained in the product to be free from defects in material and workmanship for a period of ninety (90) days from date of purchase; PROVDED, however, that this limited warranty is extended only to the original retail purchaser and is also subject to the conditions, exclusions, and limitations hereinafter set forth.

CONDITIONS, EXCLUSIONS, AND LIMITATIONS OF LIMITED WARRANTY

These limited warranties shall be void and of no effect, if:

a. The first purchase of the product is for the purpose of resale; or
b. The original retail purchase is not made from an AUTHORIZED PEAVEY DEALER; or
c. The product has been damaged by accident or unreasonable use, neglect, improper service or maintenance, or other causes not arising out of defects in material or workmanship; or
d. The serial number affixed to the product is altered, defaced, or removed.

In the event of a defect in material and/or workmanship covered by this limited warranty, Peavey will:

a. In the case of tubes or meters, replace the defective component without charge.
b. In other covered cases (i.e., cases involving anything other than covers, footswitches, patchcords, tubes or meters), repair the defect in material or workmanship or replace the product, at Peavey's option; and provided, however, that, in any case, all costs of shipping, if necessary, are paid by you, the purchaser.

THE WARRANTY REGISTRATION CARD SHOULD BE ACCURATELY COMPLETED AND MAILED TO AND RECEIVED BY PEAVEY WITHIN FOURTEEN (14) DAYS FROM THE DATE OF YOUR PURCHASE.

In order to obtain service under these warranties, you must:

a. Bring the defective item to any PEAVEY AUTHORIZATION DEALER or AUTHORIZATION PEAVEY SERVICE CENTER and present therewith the ORIGINAL

PROOF OF PURCHASE supplied to you by the AUTHORIZED PEAVEY DEALER in connection with your purchase from him of this product

If the DEALER or SERVICE CENTER is unable to provide the necessary warranty service you will be directed to the nearest other PEAVEY AUTHORIZED

DEALER or AUTHORIZED PEAVEY SERVICE CENTER which can provide such service, OR

b. Ship the defective item, prepaid, to:

PEAVEY ELECTRONICS CORPORATION

International Service Center

326 Hwy. 11 & 80 East

Meridian, MS 39301

Including therewith a complete, detailed description of the problem, together with a legible copy of the original PROOF OF PURCHASE and a complete return address. Upon Peavey's receipt of these items: If the defect is remedial under these limited warranties and the other terms and conditions expressed herein have been complied with, Peavey will provide the necessary warranty service to repair or replace the product and will return it, FREIGHT COLLECT, to you, the purchaser.

Peavey's liability to the purchaser for damages from any cause whatsoever and regardless of the form of action, including negligence, is limited to the actual damages up to the greater of $500.00 or an amount equal to the purchase price of the product that caused the damage or that is the subject of or is directly related to the cause of action. Such purchase price will be that in effect for the specific product when the cause of action arose. This limitation of liability will not apply to claims for personal injury or damage to real property or tangible personal property allegedly caused by Peavey's negligence, Peavey does not assume liability for personal injury or property damage arising out of or caused by a non-Peavey alteration or attachment, nor does Peavey assume any responsibility for damage to interconnected non-Peavey equipment that may result from the normal functioning and maintenance of the Peavey equipment.

UNDER NO CIRCUMSTANCES WILL PEAVEY BE LIABLE FOR ANY LOST PROFITS, LOST SAVINGS, ANY INCIDENTAL DAMAGES, OR ANY CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT, EVEN IF PEAVEY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

THESE LIMITED WARRANTYES ARE IN LIEU OF ANY AND ALL WARRANTYES, EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTYES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR USE: PROVIDED, HOWEVER, THAT IF THE OTHER TERMS AND CONDITIONS NECESSARY TO THE EXISTENCE OF THE EXPRESSSED, LIMITED WARRANTYES, AS HEREINABOVE STATED, HAVE BEEN COMPLIED WITH, IMPLIED

WARRANTIES ARE NOT DISCLAIMED DURING THE APPLICABLE ONE-YEAR OR NINETY-DAY PERIOD FROM DATE OF PURCHASE OF THIS PRODUCT.

SOME STATES DO NOT ALLOW LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS, OR THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU. THESE LIMITED WARRANTYES GIVE YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE.

THESE LIMITED WARRANTY ARE THE ONLY EXPRESSED WARRANTY ON THIS PRODUCT, AND NO OTHER STATEMENT, REPRESENTATION, WARRANTY, OR AGREEMENT BY ANY PERSON SHALL BE VALID OR BINDING UPON PEAVEY.

In the event of any modification or disclaimer of expressed or implied warranties, or any limitation of remedies, contained herein conflicts with applicable law, then such modification, disclaimer or limitation, as the case may be, shall be deemed to be modified to the extent necessary to comply with such law.

Your remedies for breach of these warranties are limited to those remedies provided herein and Peavey Electronics Corporation gives this limited warranty only with respect to equipment purchased in the United States of America.

INSTRUCTIONS—WARRANTY REGISTRATION CARD

1. Mail the completed WARRANTY REGISTRATION CARD to:

PEAVEY ELECTRONICS CORPORATION

P.O. BOX 2898

Meridian, MS 39302-2898

a. Keep the PROOF OF PURCHASE In the event warranty service is required during the warranty period, you will need this document. There will be no identification card issued by Peavey Electronics Corporation
2. IMPORTANCE OF WARRANTY REGISTRATION CARDS AND NOTIFICATION OF CHANGES OF ADDRESSES:
a. Completion and mailing of WARRANTY REGISTRATION CARDS—Should notification become necessary for any condition that may require correction the REGISTRATION CARD will help ensure that you are contacted and properly notified.
b. Notice of address changes - If you move from the address shown on the WARRANTY REGISTRATION CARD, you should notify Peavey of the change of address so as to facilitate your receipt of any bulletins or other forms of notification which may become necessary in connection with any condition that may require dissemination of information or correction.
3. You may contact Peavey directly by telephoning [phone].

IMPORTANT SAFETY INSTRUCTIONS

WARNING: When using electric products, basic cautions should always be followed. including the following.

1. This unit should be checked by a qualified service technician if:

2. Read all safety and operating instructions before using this product.

3. All safety and operating instructions should be retained for future reference.
4. Obey all cautions in the operating instructions and on the back of the unit.
5. All operating instructions should be followed.
6. This product should not be used near water, i.e., a bathtub, sink, swimming pool, wet basement, etc.
7. This product should be located so that its position does not interfere with its proper ventilation. It should not be placed flat against a wall or placed in a built-in enclosure that will impede the flow of cooling air.
8. This product should not be placed near a source of heat such as a stove, radiator, or another heat producing amplifier.
9. Connect only to a power supply of the type marked on the unit adJacent to the power supply cord.
10. Never break off the ground pin on the power supply cord. For more information on grounding, write for our free booklet "Shock Hazard and Grounding."
11. Power supply cords should always be handled carefully. Never walk or place equipment on power supply cords. Periodically check cords for cuts or signs of stress, especially at the plug and the point where the cord exits the unit.
12. The power supply cord should be unplugged when the unit is to be unused for long periods of time.
13. If this product is to be mounted in an equipment rack, rear support should be provided.
14. Metal parts can be cleaned with a damp rag. The vinyl covering used on some units can be cleaned with a damp rag or an ammonia-based household cleaner if necessary. Disconnect unit from power supply before cleaning.
15. Care should be taken so that objects do not fall and liquids are not spilled into the unit through the ventilation holes or any other openings.

a. The power supply cord or plug has been damaged.
b. Anything has fallen or been spilled into the unit.
c. The unit does not operate correctly.
d. The unit has been dropped or the enclosure damaged.

1. The user should not attempt to service this equipment. All service work should be done by a qualified service technician.
2. This product should be used only with a cart or stand that is recommended by Peavey Electronics.
3. Exposure to extremely high noise levels may cause a permanent hearing loss. individuals vary considerably in susceptibility to noise induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient time. The U.S. Government's Occupational Safety and Health Administration (OSHA) has specified the following permissible noise level exposures.

Duration Per Day In Hours

8

6

4

3

2

1 1/2

1

1/2

1/4 or less

Sound Level dBA, Slow Response

90

92

95

97

100

102

105

110

115

According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. Ear plugs or protectors h1 the ear canals or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss if exposure is in excess of the limits as set forth above. To ensure against potentially dangerous exposure to high Sound pressure levels, it is recommended that all persons exposed to equipment capable of producing high sound pressure levels such as this amplification system be protected by hearing protectors while this unit is in operation.

SAVE THESE INSTRUCTIONS!

Features and specifications subject to change without notice.

A Product of Peavey Electronics Corporation

5022 Hartley Peavey Drive / Meridian, MS 39305 / U.S.A. / [phone] / Fax [phone]