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D1/D2/D3/D4

PROFESSIONAL POWER AMPLIFIERS

OWNER'S MANUAL

www.altoproaudio.com

Version 1.3 SEPTEMBER 2007

LTO

R

English

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Summary of Contents for D1

Page 1: ...D1 D2 D3 D4 PROFESSIONAL POWER AMPLIFIERS OWNER S MANUAL www altoproaudio com Version 1 3 SEPTEMBER 2007 LTO R English ...

Page 2: ...es 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 The apparatus shall be connected to a mains socket outlet with a prot...

Page 3: ...minimum load of 8 ohm when working in Bridge Mode Enjoy your D amplifier and make sure to read this manual carefully before operation 2 FEATURES Illuminated Power Switch Automatic Clip limiter circuit Switchable low frequency filter at 30 Hz Operating Mode is Stereo Parallel or Bridge Balanced Combo input connectors Output connectors are speak on jacks and binding post terminals Low noise variable...

Page 4: ...2 dB 1 16 8 22 24 26 28 0 6 CH1 dB 12 16 1 20 22 4 6 28 30 6 CH2 S G CL P PROT SIG CL P PROT D2 500W 4 B 1 1 18 20 2 24 26 28 30 6 CH1 dB 1 1 8 0 22 4 26 8 0 CH2 dB 12 16 18 20 22 4 6 8 30 6 CH3 dB 2 6 18 20 22 24 6 8 30 6 CH4 S G CLIP PROT S G CL P PROT SIG CL P PROT IG CLIP PROT D1 500W 2 B 1 1 18 20 2 24 26 28 30 6 CH1 dB 1 1 8 0 22 24 26 28 0 CH2 S G CLIP PROT S G CL P PROT 2 SPOTLIGHT D1 D2 D...

Page 5: ...ndent channels are sent to 2 separate speakers PARALLEL MODE HOOK UP One mono signal is input to CH A or CH B of the D series amplifier and then output to 2 separate speakers Each speaker volume can be set separately 3 D1 0W 1 1 4 1 1 4 8 D1 0 ...

Page 6: ...t will be combined power of the two channels This application is only for D1 or D3 For the D2 or D4 it has four channels so only use one amplifier The Main Mix signal is routed into an electronic crossover CH A drives the woofer and CH B drives the high frequency driver in a 2 way enclosure STEREO BIAMP HOOK UP 4 D1 0W 1 1 4 8 6 4 8 T D1 1 4 8 4 8 T D1 1 4 8 4 8 T ...

Page 7: ...ll light up when the unit is in Protection Mode due to short circuit low impedance load or other causes 5 GAIN CONTROLS These controls are used to adjust the output signal level 6 COOLING VENTS Allow air circulation from front to back of the amplifier 1 dB 12 1 18 20 22 24 26 28 30 6 CH1 dB 12 16 18 20 22 24 26 28 30 6 CH2 dB 12 1 18 20 22 24 26 28 30 6 CH3 dB 12 16 18 20 22 24 6 28 30 6 CH4 SIG C...

Page 8: ...ctors are specifically designed to connect high power speakers The correct polarity is secured automatically they prevent shock hazard and they lock in securely 11 BINDING POST OUTPUTS Please make sure to respect the speaker polarity when using binding post Turn off the unit before connecting an audio signal to the binding post to avoid any electric shock Caution 3 CONTROL ELEMENTS SPOTLIGHT 6 7 8...

Page 9: ... operating modes Stereo Mode In this mode CH A and CH B operate independently as a normal stereo amplifier The CH A input signal will be output from the CH A output connector and CH B input signal will be output from the CH B output connector Bridged Mode In this mode CH A input signal will be output from the bridge mono output connector Detail wiring diagram you can refer to chapter 4 14 COOLING ...

Page 10: ... S APPARATUS TO RAIN OR MOI TURE SEE INSTRUCTION BEFORE USING BREAKER DES GNED IN TALY SUPPLY AC 220 240V 50Hz MAX NPUT 2000W PUSH PUSH 8 In this mode channel A and channel B operate independently as a conventional stereo amplifier The channel A input signal will be output from the channel A output connectors and the channel B input signal will be output from the channel B output connectors The D ...

Page 11: ...NEL 2 CHANNEL 3 CHANNEL 4 OFF ON LF 30HZ FILTER BRIDGED CH1 CH2 BR DGED MONO OUTPUT CH1 CH2 CH1 CH2 CH1 1 2 1 1 2 2 BR DGED CH2 LO K LO K STEREO PARALLEL BR DGED CH2 INPUT MODEL SER AL WARNING TO REDUCE THE R SK OF F RE OR ELECTR C SHOCK DO NOT EXPOSE TH S PPARATUS TO RAIN OR MO STURE SEE INSTRUC ION BEFORE USING BREAKER DES GNED IN I A Y SUPPLY AC 220 240V 50Hz MAX NPUT 2000W PUSH PUSH OFF ON LF ...

Page 12: ... NO USING CHANNEL 2 CHANNEL 1 STEREO BRIDGED PARALLEL OFF ON LF 30HZ FILTER BRIDGED CH1 CH2 BRIDGED MONO OUTPUT CH1 CH2 CH1 CH2 CH1 2 BR DG D CH2 LO L STEREO PARALLEL RIDGED CH2 1 INPUT MODE SER A WARNING TO REDUCE THE RISK OF FIRE OR ELECTR C SHOCK DO NOT EXPOSE TH S APPARATUS TO RAIN OR MOISTURE SEE INSTRUCT ON BEFORE USING BREAKER DES GNED N TALY SUPPLY AC 22 240V 50Hz MAX NPUT 2000W PUS PUSH O...

Page 13: ...11 5 BLOCK DIAGRAM DIGIMOD DIGIMOD ...

Page 14: ... Power EIAJ 1 THD Both channels driven 230V Bridged Mode 16ohms INPUT CLIPPING 2 CH Amplifier 4 CH Amplifier 2 CH Amplifier 4 CH Amplifier 2 X 240 W 4 X 240 W 2 X 340 W 4 X 340 W 4 X 390 W 2 X 390 W 2 X 540 W 4 X 540 W 2 X 270 W 2 X 500 W 4 X 270 W 4 X 500 W 2 X 370 W 2 X 750 W 4 X 370 W 4 X 750 W 1 X 520 W 2 X 520 W 1 X 740 W 2 X 740 W 8ohms 1 X 1000 W 2 X 1000 W 1 X 1500 W 2 X 1500 W 0 5 20 Hz 2...

Page 15: ...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 16: ...hotocopy translation or reproduction of part of this manual without written permission is forbidden Copyright 2007 Seikaku Group SEIKAKU TECHNICAL GROUP LIMITED NO 1 Lane 17 Sec 2 Han Shi West Road Taichung 40151 Taiwan http www altoproaudio com Tel 886 4 22313737 email alto altoproaudio com Fax 886 4 22346757 ...

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