Alto APM-160, APM-120 Users Manual

User's Manual

APM120/APM160

POWERED MIXER

www.altoproaudio.com

Version 1.0 JUNE 2008

English

IMPORTANT SAFETY INSTRUCTION

CAUTION

RISK OFELECTRIC SHOCK

DO NOTOPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK PLEASE DO NOT REMOVE THE COVER OR THE BACK PANEL OF THIS EQUIPMENT. THERE ARE NO PARTS NEEDED BY USER INSIDE THE EQUIPMENT. FOR SERVICE, PLEASE CONTACT QUALIFIED SERVICE CENTERS.

This symbol, wherever used, alerts you to the

presence of un insulated and dangerous voltages within the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death.

This symbol, wherever used, alerts you to important operating and maintenance instructions.

Please read.

Protective Ground Terminal AC mains (Alternating Current)

Hazardous Live Terminal ON: Denotes the product is turned on. OFF: Denotes the product is turned off.

CAUTION

Describes precautions that should be observed to prevent damage to the product.

1.

Read this Manual carefully before operation. Keep this Manual in a safe place.

2.

Be aware of all warnings reported

3.

with this symbol.

4.

Keep this Equipment away from water and moisture.

5.

Clean it only with dry cloth. Do not use solvent or other chemicals.

6.

Do not damp or cover any cooling opening. Install the equipment only in accordance with the Manufacturer's instructions.

Power Cords are designed for your safety. Do

7.

not remove Ground connections! If the plug does not fit your AC outlet, seek advice from a qualified electrician. Protect the power cord and plug from any physical stress to avoid risk of electric shock. Do not place heavy objects on the power cord. This could cause electric shock or fire.

Unplug this equipment when unused for long

8.

periodsoftimeorduringastorm.

Refer all service to qualified service personnel

9.

only. Do not perform any servicing other than those instructions contained within the User's Manual.

To prevent fire and damage to the product,

10.

use only the recommended fuse type as indicated in this manual. Do not short circuit the fuse holder. Before replacing the fuse, make sure that the product is OFF and disconnected from the AC outlet.

WARNING

To reduce the risk of electric shock and fire, do not expose this equipment to moisture or rain.

Dispose of this product should notbeplacedinmunicipalwaste and should be separate collection.

Move this Equipment only with a cart,

11.

stand, tripod, or bracket, specified by the manufacturer, or sold with the Equipment. When a cart is used, use caution when moving the cart / equipment combination to avoid possible injury from tip over.

12.

Permanent hearing loss may be caused by exposure to \ extremely high noise levels. The US. Government's Occupational Safety and Health Administration (OSHA) has specified the permissible exposure to noise level. These are shown in the following chart:

HOURS X DAY SPL EXAMPLE

Small gig

8 6 4 3 2 1,5 1 0,5 0,25 or less

According to OSHA, an exposure to high SPL in excess of these limits may result in the loss of heat. To avoid the potential damage of heat, it is recommended that Personnel exposed to equipment capable of generating high SPL use hearing protection while such equipment is under operation.

The apparatus shall be connected to a mains socket outlet with a protective earthing connection.

The mains plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.

90

train

92

Subway train

95

High level desktop monitors

97

Classic music concert

100 102 105 110 115

Rock concert

IN THIS MANUAL:

1. INTRODUCTION................................................................................1

2. FEATURES.......................................................................................1

3. QUICK START..................................................................................3

4. CONTROL ELEMENTS......................................................................5

5. INSTALLATION & CONNECTION......................................................15

6. PRESET LIST.................................................................................19

7. BLOCK DIAGRAM..........................................................................20

8. TECHNICAL SPECIFICATIONS

...........................................................22

9. WARRANTY..................................................................................24

1. INTRODUCTION

Thank you for your purchasing of the L TO APM120 12-channel (16-channel for APM

160) power mixer with 24-bit digital multi-effect built-in. It is just one of the many LTO products that a talented, multinational Team of Audio Engineers and Musicians

have developed with their great passion for music. Your APM is a remarkable compact powered mixer that doesn't find many equals in the market today. With 8 microphone (12 microphone for APM160) and 2 stereo Line-level inputs for serious live performances, your APM Series also includes a 24-bit digital multi-effect with 16 Factory Presets and 16 variations for every preset, for a total of 256 different digital effects. There is a three bands EQ on mono input channels, four bands EQ on stereo input channels. Use it for small Gigs, for Church applications and for Conference. Enjoy your APM Series and make sure to read this Manual carefully before operation!

2. FEATURES

8 MONO (APM120)/12 MONO (APM160) inputs with gold plated XLR and balanced TRS jack. 2 Stereo input channels with balanced TRS jacks. GAIN and +48 V Phantom power for mono/MIC inputs. Peak LED in each channel. 3-band EQ with sweepable MID on mono inputs. 4-band EQ on stereo inputs. 24-bit internal DSP with 256 effects, 16 presets by 16 variations with DSP mute switch and peak LED. 9-band graphic EQ. BNC socket for connecting gooseneck lamps. Low cut filters 75 Hz, 18 dB/Oct. on mono inputs. Low pass filter on mono outputs (80~120 Hz). High accurate 12-segment Bar graph Meters. Maximum Output Power(EIAJ): APM120: 500 W+500 W/4 Ohms (1000 W bridge/8 Ohms) APM160:

750 W+750 W/4 Ohms (1500 W bridge/8 Ohms)

1

SPOTLIGHT

OF ON

MIC1 MIC 2 MIC 3 MIC 4 MIC 5 MIC 6 MIC 7 MIC 8

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3. QUICK START

This is the fastest way to get something out from your APM Series, if you have a keyboard and a microphone.

a. Plug the microphone into Channel 1 MIC IN. b. Turn down AUX and LEVEL controls on the input channel. c. Put the EQ controls on center position. d. Connect 2 passive cabinets to the rear speaker cabinets. e. Turn on your APM Series. f. Sing or speak into the microphone with normal volume and adjust the channel LEVEL

control of half. g. If you like, you can adjust the EQ at this stage. h. The LED on the Master LED meter should flash only occasionally, otherwise you will hear

distortion. If this LED is not active and you still hear distortion, please turn down a little

the input LEVEL control or reduce the output level of your source instrument. i. Connect your stereo keyboard into channel 9/10 and repeat the sequence.(for APM120)

Connect your stereo keyboard into channel 13/14 and repeat the sequence.(for APM160)

Here you are. It is your first gig with your APM Series.

3

HOOK

UP

MIC2 MIC3 MIC4

MIC1

SMALL GIG HOOKUP DIAGRAM

WIRELESS

MICROPHONE

CD PLAYER 1

PASSIVE SPEAKERS

STAGE MONITORS

HOOK

OFF ON

P ANTOM

12

3123123

BAL UNBAL

2

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12

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34

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12

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6

7

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BASS

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UP

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12

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12

34

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12

3

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5

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4

SPOTLIGHT

4. CONTROL ELEMENTS

Mono and Stereo Input Channels

1 The MONO MIC/LINE Channels

Your APM120 is equipped with 8 (12 for APM160) low-noise microphone preamplifiers with optional phantom power, 45 dB of Gain and over 115 dB of S/N ratio. You can connect almost any type of microphone. Dynamic microphones do not need phantom power. Use phantom power only with condenser microphones but make sure that the phantom power button is disengaged before connecting the microphone. Phantom power will not damage your dynamic microphones, so make sure to read the microphone instructions manual before engaging phantom

power. Use switch (4) to activate/deactivate phantom power. These channels are also equipped with 1/4" TRS balanced/unbalanced LINE-IN plugs to connect line-level instruments such as keyboards, drum machines and effect devices.

2 MONO Channel INSERT

This is where you connect external sound processors such as compressor-limiter, equalizers, etc. The insert point is available on the first 8 MIC (12 for APM120) channels only. For the other channels you can always insert the processor in between the sound source (such as keyboard or drum machine) and the APM input. The Insert sockets can be used as direct-outs to feed the input of a 4-track tape recorder.

3 STEREO INPUTS

These are Channel 9/10 and 11/12 (Channel13/14 and 15/16 for APM160). They are organised in stereo pair and provided with 1/4" TRS phone sockets. If you connect only the left jack, the input will operate in mono mode, that is the mono signal will appear on both input channels. You can use these inputs with a stereo keyboard, drum machine, etc.

4 +48 Volt Phantom Power

It is available only to the XLR MIC sockets. Never plug in a microphone when phantom power is already on. Before turning phantom power on, make sure that all faders are all the way down. In this way you will protect your stage monitors and main loudspeakers.

MIC 1

12

3

1

2

3

(MONO)

RIGHT

OFF ON

LINE IN

BAL/UNBAL

INSERT

LINE IN 9

LEFT

LINE IN 10

PHANTOM

+48V (CH 1 4)

1

4

5

SPOTLIGHT

4. CONTROL ELEMENTS

5 MONO IN GAIN

This control is provided with 2 different indications: One is for the MIC and the other for LINE levels. When you use a microphone, you shall read the MIC ring (0~-45dB); when you use a line level instrument, you shall read the LINE ring (+15~-30dB). For optimum operation you shall set this control in a way that the PEAK LED(18) blinks only occasionally in order to avoid distortion on the input channel.

6 LEVEL SET LED

This LED will help you to detect the input level immediately. In this case the research of the fault will become much faster!

6

5

7

LEVEL SET

0

+15

MIC

LINE

dB

30

LOW CUT

75Hz

18dB/Oct

7 LOW-CUT Button

By pressing this button you will activate a 75 Hz low frequency filter with a slope of 18 dB per octave. You can use this facility to reduce the hum noise infected by the mains power supply, or the stage

6

8

LEVEL SET

+20 20

dB

rumble while using a microphone.

GAIN

45

GAIN

9/10

1

8 STEREO IN GAIN

When you use a line level instrument, you shall read the ring (+20~-20dB).For optimum operation you shall set this control in a way that the PEAK LED(18) blinks only occasionally in order to avoid distortion on the input channel.

EQUALISER

There are 1-8 (channel1-12 for APM160): HI, MID and LOW band. There are the

3 bands EQ with sweepable MID on all mono input channel

4 bands fixed frequency EQ on stereo channel 9-12 (channel13-16 for APM160): HI, HI-MID, MID-LOW and LOW band. All bands provide up to 15 dB of boost or cut.

15 +15

EQ

HI

12kHz

HI MID

3kHz

MID LOW

500Hz

LOW 80Hz

9

11

12

13

EQ

HI

100Hz

15 +15

800

15 +15

12kHz

MID

FREQ

8KHz

LOW

80Hz

9

10

13

6

SPOTLIGHT

4. CONTROL ELEMENTS

9HI

If you turn this control up, you will boost all the frequencies above 12 kHz (shelving filter). You will add transparency to vocals and guitar and also make cymbals crispier. Turn the control down to cut all frequencies above 12 kHz. In such way you can reduce Sibilances of human voice or reduce the hiss of a Tape player.

10 MID

This is a peaking filter and it will boost/cut frequencies from 100 Hz to 8 kHz depending on the position of the MID freq control. This control will affect especially upper male and lower female vocal ranges and also the harmonics of most musical instruments.

11 HI-MID

This control gives you up to 15 dB boost/cut at 3 kHz. It is useful for controlling voice. It can accurately polish your performance via adjusting this knob.

12 MID-LOW

This control gives you up to 15dB boost or cut at 500Hz.

13 LOW

If you turn this control up, you will boost all frequencies below 80Hz. You will give more punch to bass drum and bass guitar and make the vocalist more "macho". Turn it down, you will cut all the frequencies below 80Hz. In this way you can avoid low-frequency vibrations and resonance thus preserving the life of your woofers.

14 AUX SENDS Level Control

These four controls are used to adjust the level of the respective signal sent to AUX bus, AUX1 and AUX2 can be switched to PRE/POST-FADER via the PRE/POST button, so, generally, they can be used for monitor application and effects & sound processors Input. AUX3 and AUX4 are configured as POST-Faders. In this typical compact unit, excluding sending out the signal directly to the external effect or processor equipment, AUX SEND4 can also be assigned to the internal onboard effect module.

14

15

11

AUX

8

+10

22

8

+10

33

DFX1 (EXT)

8

+10

44

DFX2 (INT)

8

+10 +10

BAL BAL

RIGHT RIGHT

LEFT LEFT

MUTE MUTE

AUX

POST PRE

8

+10

POST PRE

8

+10

DFX1 (EXT)

8

+10

DFX2 (INT)

8

16

POST PRE

7