Peavey Q 231F Dual 31-Band Graphic Equalizer User manual
- Category
- Audio mixers
- Type
- User manual
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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.
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PRECAUCION: Para disminuír el riesgo de corrientazo, no abra la cubierta. No hay piezas adentro que el usario pueda
reparar. Deje todo mantenimiento a los técnicos calificados.
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Antes de usar este aparato, lea más advertencias en la guía de operación.
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dangereuse pouvant être d'intensité suffisante pour constituer un risque de choc électrique.
Ce symbole est utilisé pour indiquer à l'utilisateur qu'il ou qu'elle trouvera d'importantes instructions sur
l'utilisation et l'entretien (service) de l'appareil dans la littérature accompagnant le produit.
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aucune pièce pouvant être réparée par l'utilisateur. Confier l'entretien à un personnel qualifié.
AVERTISSEMENT: Afin de prévenir les risques de décharge électrique ou de feu, n'exposez pas cet appareil à la pluie
ou à l'humidité. Avant d'utiliser cet appareil, lisez les avertissements supplémentaires situés dans le guide.
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von Ausreichender Stärke sind, um einen elektrischen Schlag verursachen zu können.
Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam machen, die
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Feuchtigkeit ausgesetzt werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.
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E N G L I S H
Congratulations on purchasing the Q
™
231FX! Peavey engineers have taken graphic equalizers to the next
level with its introduction. The Q
™
231FX is designed to provide refined control over any sound reinforce-
ment or studio application. We trust that you are eager to place this unit into YOUR system ASAP.
The Q231FX offers dual 31-band graphic equalization with 1/3 octave filters featuring superior constant “Q”
devices. Each channel has balanced inputs/outputs and Peavey’s exclusive FLS
™
Feedback Locating
System that consists of LED indicators located above 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 above the associated frequency band to illuminate. By moving
the fader downward for that band, the likelihood of feedback is reduced/eliminated.
Most people use the Q231FX in two ways:
1. To catch and reduce/eliminate feedback “on-the-fly” during a performance, and
2. To determine frequency bands that are susceptible to feedback BEFORE the performance, eliminating
them in advance. How do you do this? After the system is set up, slowly bring up the microphone levels. As
they start to feedback, note the LED activity on the Q231FX 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 common 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 counter productive. If any
operational questions come up, be sure and contact our Customer Service department at (601) 483-5365.
Thanks for supporting Peavey!
OPERATION NOTE
For best results, set the mixer levels high enough to cause the Feedback Locating System LEDs to become
active (0 dBV, 1 V RMS). This may require you to turn down the power amp to maintain an acceptable
volume level.
E N G L I S H
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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 curve of a poor loudspeaker.
Always begin with all sliders in the “0” position and avoid excessively cutting large segments of the audio
passband, as this will limit the system's dynamic range.
Exercise caution when attempting to boost equalization below cutoff of the speaker system. Typical sound
reinforcement enclosures are not designed for 20 Hz performance and transducer damage could result.
LOW CUT (1)
Provides high pass filtering at 40 Hz in the “in” position. Low frequency roll-off is at 12 dB per octave. There
is one on each channel.
LOW CUT LED (2)
With the low cut switch in the “in” position, this LED will illuminate indicating a low frequency roll-off at 12 dB
per octave at 40 Hz. There is one on each channel.
BYPASS (3)
In bypass mode (switch in), the input signal is routed directly to the output and is unaffected by all front
panel controls with the exception of the low cut filter. There is one on each channel.
BYPASS LED (4)
This LED will illuminate when the bypass switch is in the “in” position indicating that the EQ and gain
controls are bypassed. There is one on each channel.
EQUALIZER SECTION (5)
31-bands of 1/3 octave filters. The filters are constant “Q” devices located at ISO center frequencies. Effec-
tive equalization range is from 20 Hz to 20 kHz. Maximum boost per frequency is 12 dB and the maximum
cut per frequency is 18 dB.
AUTOMATIC FEEDBACK LOCATING LEDS (6)
When feedback occurs, the LED of the frequency band that is feeding back will illuminate over the slider that
needs adjusting. The LED will remain illuminated for a few seconds even after the feedback is gone. This
allows you to see where the feedback is if the feedback goes away before any correction is made. If there is
no feedback occurring, all the LEDs will become active acting as a basic real-time analyzer.
OPERATING THE FEEDBACK LOCATING SYSTEM
The feedback locating system is normally used 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 elimi-
nate them in advance. This is done, after the system is set up, by bringing up the microphone levels
slowly to the point of feedback. As they start to feedback, note the LED activity on the Q231 FX.
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 occur over several frequency bands. Also, go easy when making
fader adjustments since extreme movements will affect your performance and be counter productive. Some
feedback or ringing, although audible, may not be louder than the other program material and may not light
an LED.
GAIN (7)
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.
For 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 dB to maintain unity gain through the
equalizer.
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BACK PANEL FEATURES:
LINE CORD-120V PRODUCTS ONLY (10)
We have incorporated a 2-wire line (mains) cable for power on the Q231 FX.
Power requirements:
Domestic: 120 V AC / 60 Hz / 20 W.
Export: 230 V AC / 50/60 Hz / 20 W.
NOTE: CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO
WIDE SLOT, FULLY INSERT.
NOTE: FOR UK ONLY
As the colors of the wires in the mains lead of this apparatus may not correspond with the colored markings
identifying the terminals in your plug, proceed as follows: (1) The wire which is colored green and yellow
must be connected to the terminal which is marked by the letter E or by the earth symbol or colored green or
green and yellow. (2) The wire which is colored blue must be connected to the terminal which is marked with
the letter N or the color black. (3) The wire which is colored brown must be connected to the terminal which
is marked with the letter L or color red.
XLR OUTPUTS (11)
This XLR jack provides an electronically balanced output that is electrically the same as the 1/4" TRS Output
(11). Using this balanced output will provide a 6 dB increase from unbalanced operation.
1/4" OUTPUTS (12)
Two 1/4" Tip-Ring-Sleeve (stereo) jacks (one per channel) provide balanced outputs when
used with stereo (TRS) 1/4" plugs and 2-conductor shielded cables. When used with a mono
1/4" phone plug, the outputs are unbalanced. The Tip is in phase ( + ) and the Ring is out of
phase ( - ). Using this as a balanced output will provide a 6 dB increase from unbalanced
operation.
XLR INPUTS (13)
This XLR jack provides a balanced input that is electrically the same as the 1/4" TRS Input (13).
1/4" INPUTS (14)
Two 1/4" Tip-Ring-Sleeve (stereo) jacks (one per channel) provide balanced inputs when used with stereo
(TRS) 1/4" plugs and 2-conductor shielded cables. When used with a mono 1/4" phone plug, the inputs are
unbalanced. The Tip is in phase ( + ) and the Ring is out of phase ( - ).
LED LEVEL METER (8)
This multicolored LED ladder indicates output level. There is one on each channel.
POWER SWITCH (9)
Used to turn AC mains power on or off.
Back Panel:
11 13
10
12
14
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Q231 FX SPECIFICATIONS
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 wide band 20 Hz
to 20 kHz unless otherwise stated.
All specifications measured at 1 V RMS input and unbalanced
output. All sliders at mid position; all switches out unless
otherwise noted.
Frequency Response:
±1 dB, 20 Hz to 20 kHz
Distortion:
0.005%, 20 Hz to 20 kHz
Input Impedance:
Balanced 20K ohms (equal impedances to ground)
Output Impedance:
330 ohms
Maximum Input Level:
+21 dBV (8 V RMS)
Maximum Output Level:
+21 dBV (8 V RMS)
Nominal Input Level:
0 dBV (1 V RMS)
Nominal Output Level:
0 dBV (1 V RMS)
Input Headroom:
Nominal 21 dB
Output Headroom:
21 dB
Output Noise:
EQ in bypass: -101 dBV
EQ in filter: -95 dBV
Filter Frequencies:
20 Hz, 25 Hz, 32 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz,
100 Hz, 125 Hz, 160 Hz, 200 Hz, 250 Hz, 315 Hz,
400 Hz, 500 Hz, 630 Hz, 800 Hz, 1 kHz, 1.25 kHz,
1.6 kHz, 2 kHz, 2.5 kHz, 3.15 kHz, 4 kHz, 5 kHz,
6.3 kHz, 8 kHz, 10 kHz, 12.5 kHz, 16 kHz, and 20 kHz
Filter Q:
4.77
Maximum Boost and Cut Filter:
+12 dB, -18 dB
Maximum Boost and Cut Gain:
±15 dB
Low Cut Filter:
40 Hz
Power Consumption:
Domestic: 120 V AC, 60 Hz, 20 watts
Export: 220-230/240 V AC, 50/60 Hz, 20 watts
Dimensions and Weight:
5.25" H x 19" W x 10.75" D
11.7 lbs.
U.S. Patent Pending for circuit providing visual indication of feedback.
Due to our efforts for constant improvements,
features and specifications listed herein are subject to change without notice.
TM
®
7
XLR
INPUT
BALANCED
INPUT
BALANCED
INPUT AMP
40 Hz
LOW CUT
EQ
BYPASS
OUTPUT
AMP
LED
OUTPUT
METER
XLR
OUTPUT
BALANCED/
UNBALANCED
OUTPUT
NOTE: EACH FILTER HAS +12 dB / -18 dB GAIN
Frequency
Locator
20 kHz
25
Hz
40
Hz
63
Hz
100
Hz
160
Hz
250
Hz
400
Hz
630
Hz
1
kHz
1.6
kHz
2.5
kHz
4
kHz
6.3
kHz
10
kHz
16
kHz
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
GAIN
(+/- 15dB
20
Hz
125
Hz
80
Hz
50
Hz
32
Hz
200
Hz
315
Hz
500
Hz
800
Hz
1.25
kHz
2
kHz
3.15
kHz
5k
kHz
8k
kHz
12.5k
kHz
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
Feedback
Locator
1/3 OCTAVE FILTERS
Q
231FX
BLOCK DIAGRAM
This block diagram shows the signal path within the unit. In order to thoroughly
™
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For further information on other Peavey products, ask
your Authorized Peavey Dealer for the appropriate
Peavey catalog/publication.
Bass Guitars
Guitars
Bass Amplification
Guitar Amplification
Sound Reinforcement Enclosures
Microphones
Keyboards
DJ
Lighting
Mixers, Powered/Non-Powered
Accessories/Cables
Effects Processors
Axcess
™
Wear
The Peavey Beat
™
Monitor
®
Magazine
Key Issues
™
Low Down
™
PM
™
Magazine
TM
®
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IMPORTANT SAFETY INSTRUCTIONS
WARNING: When using electric products, basic cautions should always be followed, including the following:
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water. For example, near or in a bathtub, swimming pool, sink, wet basement,
etc.
6. Clean only with a damp cloth.
7. Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions. 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. Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including
amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding plug. The wide
blade or third prong is provided for your safety. When the provided plug does not fit into your inlet, consult an
electrician for replacement of the obsolete outlet. Never break off the grounding write for our free booklet
“Shock Hazard and Grounding”. Connect only to a power supply of the type marked on the unit adjacent to the
power supply cord.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the
point they exit from the apparatus.
11. Only use attachments/accessories provided by the manufacturer.
12. Use only with a cart, stand, tripod,bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged
in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into
the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been
dropped.
15. If this product is to be mounted in an equipment rack, rear support should be provided.
16. 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 and Health Administration
(OSHA) has specified the following permissible noise level exposures:
Duration Per Day In Hours Sound Level dBA, Slow Response
8 90
6 92
4 95
3 97
2 100
1 1/2 102
1 105
1/2 110
1/4 or less 115
According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. Ear
plugs or protectors to 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!
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STRIP IN FROM QUARK
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Peavey Electronics Corporation • 711 A Street • Meridian, MS 39301
(601) 483-5365 • Fax (601) 486-1278 • www.peavey.com
©1998 Printed in U.S.A. 11/98
80304517
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Peavey Q 231F Dual 31-Band Graphic Equalizer User manual
- Category
- Audio mixers
- Type
- User manual
- This manual is also suitable for
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