Nady Systems MPM 8175 User Manual

OWNER’S MANUAL

POWERED MIXER

MPM 8175

8 CHANNEL POWERED MIXER

MPM 8175

8 C H A N N E L P O W E R E D M I X E R

Congratulations on your choice of a powered mixer — you have purchased one of the finest powered mixers on the market today.
This unit was developed using the expertise of professional sound engineers and working musicians. You will find that your new NADY
AUDIO MPM 8175 has superior performance and greater flexibility than any other powered mixers in its price range. Please read this
manual carefully to get the most out of your new unit.

Thanks for selecting NADY AUDIO as your choice in powered mixers.

FEATURES

Rugged and easy to operate, the MPM 8175 offers great features and performance at an extremely affordable price and is ideal for
many small venue applications.

• 8 mono Mic/Line inputs with combo XLR-1/4” TRS jacks

• Amplifier delivers 175W @ 4 ohms total into 2 parallel speaker
output 1/4” jacks

• Built in Digital Delay produces choice of 4 sound enhancing
time delays ranging from small room to spacious

• Each channel offers Level and individual Digital Delay controls
and a Low/High 2-band EQ

• Master section includes CD/Tape Level, Master Level, and
Digital Delay Level and Delay Time select controls; Digital Delay
Select switch; and L,R Tape In and Tape Record Out RCA jacks

• Rear panel Main Out/Amp In 1/4” TRS jack unbalanced insert
point provides a break between the Main Out and the built-in
amplifier, allowing the output to be sent to an external signal
processor or additional power amplifier

• Shielded internal power supply with ~115V(60Hz)/
~230V(50Hz) select switch and fused IEC power cord connector

• Rugged case with handles and light weight (only 20.6 lbs /

9.3 Kg) for roadworthy reliability and easy portability

TABLE OF CONTENTS

FEATURES ..................................................................................3

WARNING .................................................................................... 4

INSTALLATION ............................................................................5

FRONT CONNECTIONS ..............................................................6

REAR CONNECTIONS ................................................................7

APPLICATIONS ........................................................................... 8

SPECIFICATIONS ......................................................................10

Date of Purchase _____________________________________

Dealer’s Name _______________________________________

City _______________________________________________

State _____________________ Zip _____________________

Model # ____________________________________________

Serial # ____________________________________________

WARNING

IMPORTANT SAFETY INSTRUCTIONS

When using this electronic device, basic precautions should always be taken, including the following:

1. Read all instructions before using the product.

2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet basement, or near a swimming

pool, etc.).

3. This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling.

4. This product, in combination with headphones or speakers, may be capable of producing sound levels that could cause

permanent hearing loss. Do not operate for a long period of time at a high volume level or at a level that is uncomfortable.

If you experience any hearing loss or ringing in the ears, you should consult an audiologist.

5. The product should be positioned so that proper ventilation is maintained.

6. The product should be located away from heat sources such as radiators, heat vents, or other devices

(including amplifiers) that produce heat.

7. The product should be connected to a power supply only of the type described in the operating instructions or as marked on the

product. Replace the fuse only with one of the specified type, size, and correct rating.

8. The power supply cord should: (1) be undamaged, (2) never share an outlet or extension cord with other devices so that the

outlet’s or extension cord’s power rating is exceeded, and (3) never be left plugged into the outlet when not being used for

a long period of time.

9. Care should be taken so that objects do not fall into, and liquids are not spilled through, the enclosure’s openings.

10. The product should be serviced by qualified service personnel if:

A. The power supply cord or the plug has been damaged.

B. Objects have fallen into, or liquid has been spilled onto the product.

C. The product has been exposed to rain.

D. The product does not appear to operate normally or exhibits a marked change in performance.

E. The product has been dropped, or the enclosure damaged.

11. Do not attempt to service the product beyond what is described in the user maintenance instructions. All other servicing should

be referred to qualified service personnel.

4

INSTALLATION

To ensure years of enjoyment from your NADY AUDIO MPM 8175, please read and understand this manual thoroughly before
using the unit.

INSPECTION

Your MPM 8175 was carefully packed at the factory in packaging designed to protect the units in shipment. Before installing and using
your unit, carefully examine the packaging and all contents for any signs of physical damage that may have occurred in transit.

(Note: Nady Systems is not responsible for shipping damage. If the unit is damaged, do not return to us, but notify your dealer and the
shipping company immediately to make a claim. Such claims must be made by the consignee in a timely manner.)

CONTENTS:

• Instruction manual

• MPM 8175 (verify that the unit’s serial number is same as shown on shipping carton)

• AC Power cord

• Warranty Card

POWER CONNECTION

The MPM 8175 has an internal power supply and is designed to operate from an external AC source. Power requirements for electri­cal equipment differ from area to area. Be sure to confirm that the voltage selected by the voltage selector switch on the back panel is
proper for your area (120VAC/60 Hz or 230VAC/50Hz) per the information below:

Europe (except UK): 230V, 50Hz

UK and Australia: 240V, 50Hz

USA and Canada: 120V, 60 Hz

For other areas, please check with local authorities.

When ready to operate, plug the AC cord into the power source. Make sure that the unit is turned off before connecting to the AC
power source to avoid possible loud transients which can damage your speakers or your ears, especially when monitoring with head­phones.

5

FRONT CONNECTIONS

(3)

(5)

(2)

(1)

(4)

FRONT PANEL

Note: 1 through 5 below are referenced to Channel 1. The other 7 Channels are identical.

(9)

(8)

(6b)

(6c)

(7)

(6) (6a)

(1) LOW EQ

The control shelving response giving 15dB of boost or cut at
80Hz. Add warmth to vocals or extra punch to guitars, drums
and synths by turning to the right. Turn to the left to reduce stage
rumble, hum or to improve a mushy sound.

(2) HIGH EQ

Turn to the right to boost high frequencies, adding crispness too
percussion from drum machines, cymbals and synths. Turn to the
left to cut these frequencies, reducing sibilance or hiss. The con­trol has a shelving response giving 15dB of boost or cut at 12kHz.

(3) LEVEL CONTROL

The Level Control determines the proportion of the channel signal
in the mix, and provides a clear visual indication of channel level.

(4) MIC/LINE INPUT

The MIC/LINE is via a combo connector, which allows the con­nections of XLR or 1/4” type phone jack. Please use a low im­pedance microphone and a properly wired cable for best results,
When the 1/4” phone jack is plugged into the combo connector,
the connection can be either a microphone or line level signal.

(5) DIGITAL DELAY (DD)

This knob determines the signal level which will be sent to the
built-in DIGITAL DELAY Effect (6) control

(6) DIGITAL DELAY

The signal from the input channels, processed by the built-in

digital delay will feed to the master output. There are three knobs
here to control the effect of the delay.
(6a) SWITCH
This push button switches the delay effect ON/OFF.
(6b) LEVEL
This knob adjusts the mix level of the effect sound.
(6c) TIME (ms)
This knob selects 80ms, 120ms, 160ms, or 200ms of
delay as desired for your intended effect.

(7) POWER ON LED INDICATOR

Indicates when the unit is ON.

(8) TAPE LEVEL CONTROL

This knob adjusts the level of signal from the TAPE IN (10) to the
Main bus.

(9) MASTER CONTROL

This adjusts the final level of the Main bus. It controls the Main
bus signal which is output to the speakers.

6

REAR CONNECTIONS

(11) (12)

(13)

REAR PANEL

(10) TAPE IN AND TAPE OUT

The TAPE IN allows cassette recorders or CD players to be
added to the Main output. The RECORD OUTPUT, with TAPE
RCA jacks, provides signal output to a cassette deck or Home
audio equipment. The nominal output level and impedance are ­10dBV/600 ohms.

(11) POWER SWITCH

Turns the unit ON or OFF. Always turn level controls down before
turning on the unit.

(12) VOLTAGE SELECTOR SWITCH

For selecting the proper voltage (115/230VAC) to match the
power supply in your area.

Note: To avoid damage to your unit, always make sure this switch
is set to the correct supply voltage. Damage caused by improper
use is not covered by the warranty.

(14)

harm the unit. Damage caused by overloading is not covered
by the warranty.

(15) MAIN OUT/AMP IN

This unbalanced insert point is a break between the main out and
the mixer main signal and the main amplifier. This insert is a 1/4”
TRS phone jack which is normally bypassed. When a 1/4” TRS
phone plug is inserted, the signal path is broken. Depending on
the wiring of the plug inserted into this jack, the MPM 8175 can
be used as either a mixer for a power amplifier or as a power
amplifier for an external input line level signal from a preamp or
mixer. Alternatively the jack can be used as an insert point for an
external effects device to process the output signal from the mixer
section of the MPM 8175 and return it pre the power amplifier
output.

(15)

(10)

(13) POWER CONNECTOR WITH FUSE HOLDER

This standard IEC power cord receptacle is used to connect
the AC power to your unit. It features a built-in fuse holder for
a 5X20mm, (4A/250V for 115VAC, and 2A/250V for 230VAC
operation) fast-blow fuse. If the fuse continuously blows, shut off
the unit and have it serviced by qualified service personnel.

(14) MONO SPEAKER OUTPUTS

Two 1/4” (6.3mm) jacks, each powered by its own separate
amplifier output stage, for connecting one or two 8 ohms speaker
cabinets.

CAUTION: Do not overload the MPM 8175 with speaker loads
less than 4 ohms as this will degrade performance and may

7

VOCAL MIC

Guitar

FRONT OF HOU SE SPEAKERS

MIC LEVEL SOURCES

AUDI O CASSET TE

DVD/ CD PLAYE R

KEYB OARD,SY NTHES IZER,SA MPLER

SPEAKERS

APPLICATIONS

8

APPLICATIONS

AUDIO C AS SE TTE

9

SPECIFICATIONS

POWER AMP OUTPUT

8Ω Total Impedance .................................. 100W RMS

4Ω Total Impedance .................................. 175W RMS

INPUTS

XLR balanced mic level ............................................. 8

1/4” TRS balanced/unbalanced mic/line level ............ 8

RCA Tape Input ......................................................... 2

CHANNELS

Level .................................................... Rotary Control

Effect ................................................... Rotary Control

Low EQ ................................................... 80Hz ±15dB

Hi EQ .................................................... 12KHz ±15dB

MASTER SECTION

Master Volume ..................................... Rotary Control

Delay On/Off ................................ Push Button Switch

Digital Delay Level ............................... Rotary Control

Digital Delay Time (80mS, 120mS, 160mS, 200mS) ............................................................................................4-position Rotary Switch

AUDIO

S/N Ratio ........................................................ >120dB

THD Power output, 20Hz to 20KHz ........................................................................................................................ <0.1%@100W/4 ohms

CROSSTALK (1KHz @ 0dBu, channel in to master output)

Channel fader down ........................................ <-65dB

FREQUENCY RESPONSE (Mic input to output)

Line level o/p @ +4dBu into 600Ω ...................... ±2dB

Power amp o/p 1 watt into 8Ω ............................ ±2dB

SENSITIVITY @ MIXER OUTPUT +4dBu with Master and channels controls set to MID

Mic/Line .................................................. -42dB/-22dB

Tape in ............................................................... -10dB

MAX INPUT LEVEL

XLR ...................................................................... -5dB

1/4” ................................................................. +16dB

MICROPHONE PREAMP E.I.N. (150( Terminated, max. Gain) ................................................................................. <-120dBm

POWER CONSUMPTION ............................ 200W

POWER REQUIREMENTS ......................................................................................................... 105-125VAC, 220-240VAC, 50-60 Hz

FUSE .............................................................................. 5x20mm glass type 4A/250V for 115VAC, 2A/250V for 230VAC, fast-blow fuse

DIMENSIONS (H x W x D) .........................................................................................................6.8”x 17.5”x 9” (17.2 x 44.5 x 22.9cm)

WEIGHT ........................................... 20.6 lbs. (9.3kg)

The specifications above are correct at the time of printing of this manual. For improvement purposes, all specifications for this unit,
including design and appearance, are subject to change without prior notice.

10

SERVICE FOR YOUR NADY AUDIO PRODUCT

(U.S.) Should your NADY AUDIO product require service, please contact the Nady Service Department via telephone

at [phone], or e-mail at [e-mail].

(International) For service, please contact the NADY AUDIO distributor in your country through the dealer from
whom you purchased this product.

DO NOT ATTEMPT TO SERVICE THIS UNIT
YOURSELF AS IT CAN BE DANGEROUS AND
WILL ALSO VOID THE WARRANTY.

NADY SYSTEMS, INC. • 6701 SHELLMOUND STREET, EMERYVILLE, CA 94608

Tel: [phone] • Fax: [phone] • www.nady.com