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Alto APM 120, User Manual

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18

5. INSTALLATION AND CONNECTION

Bridge Mode

With the AMPLIFIER MODE switch in BRIDGE position the two power amplifiers in
your APM Series drive together a single speaker cabinet with the sum of the power
of the 2 amps. Usually this solution is used to drive a single subwoofer and the main
out output on the front panel are used to feed a pair of powered speakers as mid-
high units.

Main Speaker

A

B

BRIDGE

AMP MODE

MAIN R
MONO

MAIN L

AUX 1

A

SPEAKERS

B

B

BRIDGE

1+
2+

+

MAX. OUTPUT 1000W/8 (A B,BRIDGE)
MAX. OUTPUT 500W/4 (A,B)
CLASS 2 WIRING WAY BE USED.

1 and 2 = 8 - 16 /SPEAKER
1 or 2 = 4 - 8 /SPEAKER
BRIDGE = 8 - 16 /SPEAKER

2+
2

+

1+
1

+

1+
1

+

A

B

2

2

1

1

L O C

K

L O C

K

Summary of Contents for APM 120

Page 1: ...User s Manual APM120 APM160 www altoproaudio com Version 1 0 JUNE 2008 English POWERED MIXER ...

Page 2: ...s 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 ã AC mains Alternating Current Hazardous Live Terminal ON Denotes the product is turned on OFF Denotes the product is turned off The apparatus shall be connected to a mains socket outlet with a pro...

Page 3: ... 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 Pea...

Page 4: ... 10 8 AUX DFX1 EXT 10 8 POST PRE 10 8 POST PRE 10 8 AUX AUX AUX INT DFX2 DFX1 EXT POST PRE 10 8 10 8 10 8 10 8 10 8 10 8 10 8 10 8 POST PRE 10 8 BAL BAL 1 2 3 10 8 10 8 10 8 AUX PFL PFL 15 AUX SEND1 AUX SEND2 ST OUT L L ST SUB OUT L FOOT SW MONO OUT PHONES ST SUB IN3 R MONO L R MONO ST SUB IN2 ST SUB IN1 R L MONO L R R R LOW CUT 75Hz 18dB Oct LOW CUT 75Hz 18dB Oct LOW CUT 75Hz 18dB Oct LOW CUT 75H...

Page 5: ...ED 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 s...

Page 6: ...N1 R L MONO L R R R PHANTOM PHANTOM P AMP INPUT DFX1 SEND DFX2 SEND 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 MIC2 MIC3 MIC4 DRUM MACHINE KEYBOARD CD PLAYER 1 STAGE MONITORS BASS HEADPHONE MIC1 GUITAR WIRELESS MICROPHONE D I BOX 48V CH 1 4 1 2 3 4 2 TRACK IN OUT TAPE IN TAPE OUT L L R R BAL UNBAL BAL UNBAL BAL UNBAL BAL UNBAL LINE IN 48V CH 5 8 OFF ON LINE IN LINE IN LINE IN INSERT INSERT IN...

Page 7: ...ic 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 This is where you connect external sound processors such as compressor limiter equal...

Page 8: ...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 This LED will help you to detect the input level immediately In this case the research of the fault will become much faster dB LEVEL SET 9 10 GAIN 20 20 GAIN 1 15 30 LINE MIC dB 45 LEVEL SET LOW CUT 75Hz 18dB Oct 0 EQUALISER...

Page 9: ...ofers 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 SPOTLIGHT 4 CONTROL ELEMENTS 14 AUX SENDS Level Control These four controls a...

Page 10: ...tages and then sent to the PEAK LED When the LED is red illuminated it warns you that you are reaching signal saturation and possible distortion then you should reduce the input level for avoiding distortion 18 PEAK LED Each channel has a PFL switch which will send a signal from a post EQ pre fader location to the PHONES jack Use this when you wish to use the headphones to monitor only a specific ...

Page 11: ...the STEREO bus The final output level from these jacks is adjusted by the ST OUT fader 24 ST SUB OUT Jacks These jacks are used to output the signal of the STEREO bus Use the ST SUB OUT control to adjust the final output level at the ST SUB OUT jacks Generally it is available to connecting effects unit 26 MONO OUTPUT Jack Use this balanced MONO jack to connect the input of an external amplifier or...

Page 12: ...to the AUX1 2 and 3 buses 32 AUX1 3 Controls The ST knob is used to adjust the amount of stereo signal sent from the ST SUB IN1 3 jacks to the STEREO bus 33 ST stereo Controls 34 PFL pre fader listen Switch When this switch is engaged the signal at the point before the ST control knob is sent to the PHONES jack 30 10 8 ST 1 2 3 AUX 10 8 10 8 10 8 PFL ST SUB IN 1 10 8 L R 2 4 10 20 7 30 10 CLIP 2 4...

Page 13: ...on will below the frequency 80 120 Hz if you specify by the control Use it when you are using a sub woofer LPF Control 37 LPF MONO OUT This switch applies a low pass filter to the signal that is output from the STEREO bus LPF ON OFF Switch PFL 10 dB 5 10 20 25 30 40 60 0 5 AFL AFL AFL AFL AFL 10 dB 5 10 20 25 30 40 60 0 5 10 dB 5 10 20 25 30 40 60 0 5 10 dB 5 10 20 25 30 40 60 0 5 10 dB 5 10 20 25...

Page 14: ...release the button free the stereo graphic EQ will be bypassed 45 ST OUT Fader The ST OUT fader adjusts the final level of the signal sent from the STEREO bus to the ST OUT jacks This fader is used to adjust the level of the return signal which is sent from the built in DSP to the STEREO bus 42 DFX RTN Fader 41 PFL Switch When this switch is engaged the signal at the point before the ST OUT contro...

Page 15: ...nput signal There is a powerful 24 bit 256 presets digital multi effects included in your APM Series Effects include reverbs chorus flanger delay and combinations of the above DSP SECTION Adjust this knob to select the right effect you wish to perform There are total 16 options for you several kinds of reverb mono and stereo delay effects with modulation and versatile two effect combination 50 PRE...

Page 16: ...inds of voltages for your operation From this switch you can select the voltage at 100 120VAC or 220 240VAC 56 VENTS 54 AC Inlet with FUSE Holder 53 POWER ON OFF Switch 57 SPEAKERS Jacks These vents are used for ventilation and heat dissipation CAUTTION LETHAL VOLTAGES MAY APPEAR AT OUTPUT TERMINALS CLASS 1 WIRING IS REOUIRED POWER AC INPUT 220 230V 50 60Hz RATED POWER CONSUMPTION 650W Fuse T6 3AL...

Page 17: ... EQ controls on middle position 5 Position panoramic PAN control on center position 6 Increase the input gain properly for maintaining the good headroom and ideal dynamic range 7 Depending on the actual application turn slowly the input and output level controls for obtaining the maximum gain before distortion 8 Now repeat the same sequence for all input channels The main LED meter could move up i...

Page 18: ...ONNECTION Strain Clamp Sleeve Tip Ring Sleeve Ground Screen Ring Return Signal Tip Send Signal Use for Insert Points 1 4 Stereo TRS Jack Plug 2 Hot 3 Cold 1 Ground Screen seen from soldering side Use for Balanced Mic Inputs For unbalanced use connect pin 1 to 3 3 pin XLR Male Plug 2 Hot 3 Cold 1 Ground Screen 3 pin XLR Line Socket seen from soldering side 1 2 3 1 2 3 Use for Main output For unbala...

Page 19: ...ONO Mode MAIN L MAIN R Mode And now some tips how to use the AMPLIFIER MODE switch This is the most common application The built in amplifier drives two main speaker cabinets Left and Right The AMPLIFIER MODE is on MAIN L MAIN R position With the AMPLIFIER MODE in AUX1 MONO position channel1 drives a Main speaker cabinet while channel2 drives a stage monitor 5 INSTALLATION AND CONNECTION Use eithe...

Page 20: ...ually this solution is used to drive a single subwoofer and the main out output on the front panel are used to feed a pair of powered speakers as mid high units Main Speaker A B BRIDGE AMP MODE MAIN R MONO MAIN L AUX 1 A SPEAKERS B B BRIDGE 1 2 MAX OUTPUT 1000W 8 A B BRIDGE MAX OUTPUT 500W 4 A B CLASS 2 WIRING WAY BE USED 1 and 2 8 16 SPEAKER 1 or 2 4 8 SPEAKER BRIDGE 8 16 SPEAKER 2 2 1 1 1 1 A B ...

Page 21: ...input sound on the stereo output with different time Recreate the illusion of more than one instrument from a single instrument sound Delay with room effect Stereo flanger and large room reverb Rate 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NO Preset Description Flanger Rate Rev decay time Chorus rate Rev decay time Simulate to play with another person carrying out same the notes on the same instrume...

Page 22: ...20 7 BLOCK DIAGRAM ...

Page 23: ...21 7 BLOCK DIAGRAM ...

Page 24: ...dB 80 Hz UNITY gain 100 dBr ref 4 dBu 22 dBu balanced ST SUB OUT 22 dBu DSP Section A D and D A converters DSP resolution 24 bit Type of effects Hall Room Vocal Plate REVERBS Mono Stereo DELAY max DELAY TIME 650ms Chorus Flanger Reverb MODULATIONS REVERB DELAY REVERB CHORUS Presets 256 Controls 16 position PRESET Selector 16 position VARIATION selector CLIP LED MUTE SWITCH with LED indicator REVER...

Page 25: ...A 210 240 V 6 3 A Physical Weight APM120 Net 10 68 kg 23 5 lb Gross 15 2 kg 33 5 lb Dimension W D H APM160 100 120 V 12 A 210 240 V 6 3 A APM160 Net 12 5 kg 27 6 lb Gross 17 4 kg 38 4 lb APM120 565 450 145 mm APM160 565 555 145 mm ...

Page 26: ...eriod of 1 year from the purchase date if you have completed the Warranty Registration Card in time 3 2 The warranty service is only available to the original consumer who purchased this product directly from the retail dealer and it can not be transferred 3 3 During the warranty service may repair or replace this product at its LTO own option at no charge to you for parts or for labor in accordan...

Page 27: ...ocopy translation or reproduction of part of this manual without written permission is forbidden Copyright 2008 Seikaku Group SEIKAKU TECHNICAL GROUP LIMITED NO 1 Lane 17 Sec 2 Han Shi West Road Taichung 40151 Taiwan www altoproaudio com Tel 886 4 22313737 email info altoproaudio com Fax 886 4 22346757 ...

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