Operation Manual
Audio Mixer
MX-1243
AUDIO MIXER
Welcome
Welcome
A personal welcome to you from the management and employees of Inter-M
All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value,
and we are delighted you have purchased one of our products.
We sincerely trust this product will provide years of satisfactory service, but if anything is not to your complete satisfaction, we will endeavor to make things right.
Welcome to Inter-M, and thank you for becoming part of our worldwide extended family!
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT REMOVE COVER (OR BACK).
O USER-SERVICEABLE PARTS INSIDE.
N
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
ATTENTION : RISQUE DE CHOC ELECTRIQUE
NE PAS QUVRIR
Caution: To prevent electric shock do not use this (polarized) plug with
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette fiche
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be used near water(e.g.
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so than objects do
not fall and liquids are not spilled into the enclosure through openings.
*Do not install this equipment in a confined space such as a book case or similar unit.
*Warning : To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture and objects filled with liquids, such as vases,
should not be placed on this apparatus.
*This apparatus shall be connected to a mains socket outlet with a protective earthing connection.
To completely disconnect this apparatus from the AC mains, disconnect the power supply cord plug from the AC receptacle.
*
*
The mains plug of the power supply cord shall remain readily accessible.
CAUTION
*These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other
than that contained in the operating instructions unless you are qualified to do so.
NOTE
*This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful in-
terference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
This symbol 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.
This symbol is intended to alert the user to the presence
of important operation and maintenance (servicing)
in st ructi on s in the lit eratu re ac compa ny ing the
appliance.
an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.
polarisée avec un prolongateur, une prise de courant on une
autre sor tie de courant, sauf si les lam es peuvent étre
insérées à fond sans en laisser aucune partie à découvert.
Pou r deconne cter comp letement l’appar eil du reseau
d’a limentation. deconnecter le cordon d’alimentation de la
prise murale.
La prise du reseau d’alimentation doit demeurer aisement
accessible.
Contents
Contents
Unpacking .......................................................................................................................................2
Installation
Environment....................................................................................................................................2
Important Safety Instructions.............................................................................................................2
Features....................................................................................................................3
Front Panel Controls ..................................................................................................4
Rear Panel Controls...................................................................................................7
Applications..............................................................................................................8
AUDIO MIXER
Block Diagram ..........................................................................................................9
Specifications ..........................................................................................................10
Service
Procedures....................................................................................................................................11
Schematic.....................................................................................................................................11
Parts List .......................................................................................................................................11
Variations and Options ...............................................................................................................11
Warranty .......................................................................................................................................11
MX-1243
1
AUDIO MIXER
Unpacking
Unpacking
Although your MX-1243 is neither complicated nor difficult to operate, we recommend you take a few minutes to
read this brief manual and familiarize yourself with the important information regarding product features, setup
and operation.
As with most electronic devices, we strongly recommend you retain the original packaging. In the unlikely event
the product must be returned for servicing, the original packaging (or reasonable equivalent) is required.
Installation
Installation
Environment
Never place this product in an environment which could alter its performance or reduce its service life. Such environments usually include high levels of heat, dust, moisture, and vibration.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
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 prong. The wide blade
or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the 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.
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MX-1243
S3125A
AUDIO MIXER
Features
Features
- 12CH INPUT AND 4 OUTPUT
Any sound source of microphones, cassette decks, electric guitars, organs can be applied to the 12 channel input,
and 4 AUX SEND, MONO OUT and MAIN L, R OUT are provided for convenient use.
- 3 BAND TONE CONTROLS
3 band tone controls are provided to adjust the acoustic characteristics according to microphones, speakers and
room structured.
- AUX SEND AND AUX RETURN
For the convenient use of effect equipment, reverb, delay or phasor AUX SEND and AUX RETURN function are
provided.
- OUTPUT MONITORING
You can monitor by LED meter and headphone.
- PFL/AFL FUNCTION
The PFL/AFL function allows you to monitor through headphone any input channel before the channel fader and
AUX output channel after the AUX SEND volume.
- PHANTOM POWER
Phantom power is provided for easy connection of condenser microphones requiring an external power supply.
MX-1243
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