Tapco T-231 User Manual
20 31.5 50 100 200 500 1.25k 2.5k 6.3k 12.5k25 40 80 160 400 1k 2k 5k 10k63 125 315 800250 630 1.6k 4k3.15k 8k 16k 20k
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20 31.5 50 100 200 500 1.25k 2.5k 6.3k 12.5k25 40 80 160 400 1k 2k 5k 10k63 125 315 800250 630 1.6k 4k3.15k 8k 16k 20k
T•231
LEVEL
+17
+12
0
0
1
-12
HI-PASS LOW-PASS
+17
+12
0
2
-12
40Hz 16kHz
LEVEL
CLIP 6
BYPASS
CLIP
RANGEHI-PASS LOW-PASS BYPASS
dB 12dB40Hz 16kHz
RANGE
6dB 12dB
DUAL 31-BAND GRAPHIC EQUALIZER
ON
OFF
POWER
RISK OF FIRE
REPLACE FUSE AS MARKED
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315mA 250V
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WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DONOT EXPOSETHIS EQUIPMENT TO RAIN OR MOISTURE. DONOT REMOVECOVER.
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NOUSER SERVICEABLEPARTS INSIDE. REFER SERVICINGTO QUALIFIED PERSONNEL.
AVIS: RISQUEDE CHOC ELECTRIQUE — NE PAS OUVRIR
WARNING
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UNBAL BALBAL/UNBAL
CHANNEL 2
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UNBAL BAL BAL
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CAUTION AVIS
pag
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
ATTENTION: POUR EVITER LES RISQUES DE CHOC
ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN
ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER. CONFIER
L'ENTRETIEN AU PERSONNEL QUALIFIE.
AVIS: POUR EVITER LES RISQUES D'INCENDIE OU
D'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE
A LA PLUIE OU A L'HUMIDITE
The lightning flash with arrowhead symbol within an equilateral
triangle is 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.
Le symbole éclair avec point de flèche à l'intérieur d'un triangle
équilatéral est utilisé pour alerter l'utilisateur de la présence à
l'intérieur du coffret de “voltage dangereux” non isolé d'ampleur
suffisante pour constituer un risque d'éléctrocution.
The exclamation point within an equilateral triangle is intended to
alert the user of the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.
Le point d'exclamation à l'intérieur d'un triangle équilatéral est
employé pour alerter les utilisateurs de la présence d'instructions
importantes pour le fonctionnement et l'entretien (service) dans le
livret d'instruction accom
SAFETY INSTRUCTIONS
1. Read Instructions — All the safety and operation instructions
should be read before this product is operated.
2. Retain Instructions — The safety and operating instructions
should be kept for future reference.
3. Heed Warnings — All warnings on this product and in these
operating instructions should be followed.
4. Follow Instructions — All operating and other instructions
should be followed.
5. Water and Moisture — This product should not be used near
water – for example, near a bathtub, washbowl, kitchen sink,
laundry tub, in a wet basement, near a swimming pool, etc.
6. Cleaning — Clean only with a dry cloth.
7. Ventilation — This product should be situated so that its location
or position does not interfere with its proper ventilation. For
example, the Component should not be situated on a bed,
sofa, rug, or similar surface that may block any ventilation
openings, or placed in a built-in installation such as a bookcase
or cabinet that may impede the fl ow of air through ventilation
openings.
nant l'appareil.
8. Heat — This product should be situated away from heat
sources such as radiators, or other devices which produce
heat.
9. Power Sources — This product should be connected to a
power supply only of the type described in these operation
instructions or as marked on this product.
10. Power Cord Protection — Power supply cords should be routed
so that they are not likely to be walked upon or pinched
by items placed upon or against them, paying particular
attention to cords at plugs, convenience receptacles, and
the point where they exit this product.
11. Object and Liquid Entry — Care should be taken so that
objects do not fall on, and liquids are not spilled into, this
product.
12. Damage Requiring Service — This product should be serviced
only by qualifi ed service personnel when:
A. The power-supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has spilled into this product; or
C. This product has been exposed to rain; or
D. This product does not appear to operate normally or
exhibits a marked change in performance; or
E. This product has been dropped, or its chassis damaged.
13. Servicing — The user should not attempt to service this
product beyond those means described in this operating
manual. All other servicing should be referred to the Tapco
Service Department.
14. To prevent electric shock, do not use this polarized plug with
an extension cord, receptacle or other outlet unless the
blades can be fully inserted to prevent blade exposure.
Pour préevenir les chocs électriques ne pas utiliser cette fi che polariseé avec
un prolongateur, un prise de courant ou une autre sortie de courant, sauf si les
lames peuvent être insérées à fond sans laisser aucune pariie à découvert.
15. Grounding or Polarization — Precautions should be taken so
that the grounding or polarization means of this product is not
defeated.
16. Power Precaution — Unplug this product during lightning
storms or when unused for long periods of time.
17. This apparatus does not exceed the Class A/Class B
(whichever is applicable) limits for radio noise emissions
from digital apparatus as set out in the radio interference
regulations of the Canadian Department of Communications.
ATTENTION —Le présent appareil numérique n’émet pas de bruits radioélectriques
dépassant las limites applicables aux appareils numériques de class A/de class B
(selon le cas) prescrites dans le règlement sur le brouillage radioélectrique édicté
par les ministere des communications du Canada.
PORTABLE CART WARNING
2
Carts and stands - The
Component should be used
only with a cart or stand
that is recommended by
the manufacturer.
A Component and cart
combination should be
moved with care. Quick
stops, excessive force, and
uneven surfaces may cause
the Component and cart
combination to overturn.
WARNING — To reduce
the risk of fi re or electric
shock, do not expose
this appliance to rain or
moisture.
18. Exposure to extremely high noise levels may cause permanent
hearing loss. Individuals vary considerably in susceptibility to
noise-induced hearing loss, but nearly everyone will lose some
hearing if exposed to suffi ciently intense noise for a period of
time. The U.S. Government’s Occupational Safety and Health
Administration (OSHA) has specifi ed the permissible noise
level exposures shown in the following chart.
Duration Per Day Sound Level dBA, Typical
In Hours Slow Response Example
8 90 Packed garage concert
6 92
4 95 VW Bus Peace Train
3 97
2 100 Cranked psychedelic tunes
1.5 102
1 105 High speed chase on C.H.I.P.s
0.5 110
0.25 or less 115 Loudest parts at a Heavy Metal concert
According to OSHA, any exposure in excess of these permissible limits
could result in some hearing loss. 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
use hearing protectors while the equipment is in operation. Ear plugs or
protectors in the ear canals or over the ears must be worn when operating
the equipment in order to prevent permanent hearing loss if exposure is in
excess of the limits set forth here.
What me, read a manual?
Before you begin, please make sure you read the Safety Instructions on page 2 and
Getting Started on page 4.
Your new TAPCO
often seen as a sign of weakness to read a manual, along with asking for directions when
lost, but maybe you can read the rest when nobody is looking.
It is important to keep your receipt in a safe place, and not a bad idea to write your
product information here for future reference (i.e., insurance claims, tech support, return
authorization, etc.).
Date of purchase:
Part No. 0009427 Rev. A 1/04
©2004 LOUD Technologies Inc. All Rights Reserved.
®
T•231 is designed to set up quickly and operate easily. We know it’s
Product Serial #:
Purchased at:
3
Getting Started
The following steps will help you set up your T•231, and get the
levels just right.
SETTINGS:
1. Be sure the T•231’s POWER switch is off.
Set all the sliders to their center positions and all the
2.
switches out.
CONNECTIONS:
1. Using balanced or unbalanced cables, connect
your mixer’s main outputs to the T•231’s inputs,
and the T•231’s outputs to your amplifer’s (or
powered speakers’) inputs.
If you are using the T•231 in a channel’s insert,
connect your mixer’s channel inserts to your
T•231’s INPUTs and OUTPUTs.
LOOK
CLOSER
device where the processed signal is mixed back
with the unprocessed signal, like a reverb or echo.
2. Connect the cables using either XLR or 1/4”
TRS connectors (balanced), or 1/4” TS or RCA
connectors (unbalanced).
• The XLR, TRS, and RCA inputs for each channel
are wired in parallel. Use only one input per channel.
• The XLR, TRS, and RCA outputs for each channel
are wired in parallel.
• The balanced XLR connectors are wired as
follows:
Pin 1 = shield (ground)
Pin 2 = hot (+)
Pin 3 = cold (–)
• The 1/4” TRS connectors are wired as follows:
Tip = hot (+)
Ring = cold (–)
Sleeve = shield (ground)
3. Plug all the sound system components into suitable
AC outlets, properly grounded and capable of
delivering adequate current.
4. Turn all the equipment on. If you are monitoring the
signal through speakers, turn the power amplifi er
on last to avoid getting any pops or thumps
through your speakers.
Note: The T•231 31-Band Graphic
Equalizer is designed to be inserted
“in-line” with the signal as a
serial device. This means that the
entire signal is routed through the
processor, in contrast to a parallel
SET THE CONTROLS:
1. Make sure your signal source is turned up and
delivering signal to the T•231. The signal should
pass through the T•231 unaffected because the
CHAN 1 and 2 BYPASS buttons are out and the
signal processing circuitry is bypassed.
2. Push in the CHAN 1 and 2 BYPASS buttons to
enable the graphic equalizer circuits.
3.
You can turn up and down each individual slider
and hear how it affects the sound.
4.
You can turn up and down the input LEVEL controls
to make it louder or softer. When the LEVEL control
is at the center detent, it is at unity gain (it doesn’t
boost or cut the signal).
Things To Remember:
• When you shut down your
equipment, turn off the amplifi ers
fi rst. When powering up, turn on the
amplifi ers last.
• Save the shipping box and
packing material! You may need it
someday.
4
Contents
Safety Instructions................................................................2
Getting Started....................................................................4
Introduction..........................................................................6
Hookup Diagrams................................................................8
Typical Hookup: In-line with Main Outputs
Alternate Hookup: Individual Channel or Main Inserts
T•231 Features ....................................................................9
FRONT PANEL FEATURES .................................................9
REAR PANEL FEATURES..................................................10
GENERAL PRECAUTIONS AND CONSIDERATIONS .....11
Appendix A: Service Information ....................................12
Warranty Service..........................................................12
Troubleshooting............................................................12
Repair ............................................................................13
Appendix B: Connections ................................................14
Appendix C: Technical Info..............................................15
T•231 Specifi cations ....................................................15
T•231 Block Diagram ...................................................16
Frequency Chart..........................................................18
TAPCO LIMITED WARRANTY...............................................19
.....................8
..8
1. EQ Sliders ...............................................................9
2. Input LEVEL ............................................................9
3. HI-PASS ..................................................................9
4. LOW-PASS ..............................................................9
5. BYPASS....................................................................9
6. CLIP ........................................................................9
7. RANGE ...................................................................9
8. POWER ...................................................................9
9. Line Cord Socket and Fuse................................10
10. AC Select Switch ..............................................10
11. GND LIFT Switch ................................................10
12. OUTPUTS .............................................................10
13. INPUTS.................................................................10
Rack Mounting........................................................11
Thermal Considerations .........................................11
AC Power Considerations......................................11
Don’t forget to visit our website at www.tapcogear.com
for more information about this and other TAPCO products.
5
Introduction
Thank you for choosing a TAPCO® Tweeq™ 31-band graphic
equalizer by Mackie
days of TAPCO Corporation, Greg Mackie’s fi rst company. TAPCO
revolutionized the audio industry back in 1969 with the very fi rst 6-
channel mixer specifi cally designed for keyboards and rock ‘N’ roll PA.
In essence, TAPCO redefi ned the price performance ratio and
made high-quality professional audio mixers accessible to virtually
anyone.
by the world-class engineering and manufacturing horsepower of
Mackie. The TAPCO T•231 is the fi rst graphic equalizer in the TAPCO by
Mackie
Today, TAPCO is reborn with the same ideals and is backed
®
family.
®
. The TAPCO product line hails back to the
TAPCO version of Greg
About Graphic Equalizers
The tone controls on your home stereo system typically have a bass and treble control,
and sometimes a midrange control, that you use to boost or cut a broad band of
frequencies. When you leave the controls in the center position, they do nothing.
A graphic equalizer works in much the same way, except that it has many more controls
that operate over much narrower frequency bands. The T•231 has 31 controls that boost or
cut different frequencies, each centered on ISO standard frequencies ranging from 20 Hz
to 20 kHz and affecting 1/3 of an octave.
Constant Q Design
The T•231 is designed with constant Q fi lters. The Q of a fi lter refers to its quality. A fi lter
with a low Q affects a broader band of frequencies than a fi lter with a high Q (Q=f
you technoids!). Constant Q means that, as a slider is boosted or cut, the bandwidth of the
fi lter (the “skirt” of the affected frequencies) remains the same. Lower quality proportional
Q fi lters have a broader bandwidth as the fi lter is boosted or cut, which can extend out to
an octave or more.
/BW, for
c
Whazzit Used For?
There are a number of uses for graphic equalizers in a sound system. They can be used
to correct the frequency response of a loudspeaker, or to adjust for resonant peaks and
dips in a room. Sometimes they are used to simply bring out the characteristics of a voice or
instrument to improve the intelligibility and articulation of the sound.
In any case, please remember that a graphic equalizer is a tool that can be used to
improve the overall sound, but it cannot make up for frequency response defi ciencies
caused by poor system design or poor acoustics. Try and get the best possible sound
from the system before attempting to use equalization by paying attention to proper gain
structure and loudspeaker placement. Often times just moving a loudspeaker to a different
position can have a dramatic effect on the overall sound in the room.
Probably the most common use of a graphic equalizer is placing it in-line between the
mixing board’s main outputs and the power amplifi er inputs (see hookup diagram on page 8)
When used with a real-time analyzer and pink noise generator, it can be used to fi ne tune
the acoustic frequency response and get it as fl at as possible in a room.
TAPCO van (a.k.a. micro bus)
.
6
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