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Alto DPA900/1500 - page 1
40 BIT ENHANCED STEREO POWER AMPLIFIER DP A 900/1500 User's Manual LTO R www .altoproaudio.com V ersion 1.0 September 2004 English ...
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Alto DPA900/1500 - page 2
1 SAFETY RELA TED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol, wherever used, alerts you to the pre- sence of un-insulated and dangerous voltages with- in the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death. Protective Ground T erminal AC mains (Alternating Current) H ...
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Alto DPA900/1500 - page 3
2 PREF ACE Dear Customer: For L TO AUDIO TEAM, music and audio are much more than a job, they are a passion and an obsession! By purchasing our L TO products you become the most important member of our L TO AUDIO TEAM. We would like to share with you our passion for what we design and we invite you to make suggestions, which will aid us in developi ...
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Alto DPA900/1500 - page 4
T ABLE OF CONTENTS 1. INTRODUCTION .....................................................................................................................................4 2. FEA TURES .............................................................................................................................................4 3. CONTROL ELEMENTS .... ...
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Alto DPA900/1500 - page 5
2. FEA TURE LIST Built in 40-bit digital effect processor . Remote control through PC link 1 factory preset and 32 user presets by large memory capacity Delay lines up to 582ms for each output User-controllable clip limiter . Stereo (dual channel), or bridge mono (bi-amp output) operation mode. Balanced XLR inputs/parallel outputs to ensure noisele ...
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Alto DPA900/1500 - page 6
6. Level Control for Channels 1&2 These two controls are used to adjust output level of channel 1 and channel 2 respectively . 7. UP/DOWN Key This key is used to move inside the menus or to modify the parameter's value. 8. SELECT Key This key is used to select the menu that you wish to edit. 9. ENTER Key This key is used to edit or confirm ...
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Alto DPA900/1500 - page 7
18. RS485 IN The function of the RS485 IN is opposite to RS85 OUT . It allows incoming communication between a DP A900/ 1500 stereo amplifier and PC or another DP A900/1500 stereo amplifier . The RS485 port is very suitable for remote control over long distances (Difficult with RS232 standard ports) and daisy-chaining several DP A900/ 1500 stereo a ...
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Alto DPA900/1500 - page 8
4.3 Channel Selection There are total 3 options available (CH1, CH2, CH1+CH2), you can apply these effect settings on either or channels. both selected Select "CHSEL" using SELECT key , the "CHSEL" indicator lights up and the last selected channel will be displayed. Use UP or DOWN key to select either or both channels. Press ENT ...
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Alto DPA900/1500 - page 9
TIP/PIN2 RING/PIN3 SLEEVE/PIN1 TIP/PIN2 RING/PIN3 SLEEVE/PIN1 CH1 CH2 SERIAL MODEL Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk RS485 IN RS485 OUT RS232 SERIAL PORT BREAKER CH1 CH2 BRIDGE MONO OUTPUT2 OUTPUT1 POWER OUTPUTS CH1 1+ 1- POS NEG CH2 2+ 2- POS NEG BRIDGE 1+ 2+ POS NEG CH2 1+ 1- POS NEG MODE BRIDGE STEREO LI ...
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Alto DPA900/1500 - page 10
2>. The PC Editor should now load. A welcome screen will appear . This closes after 5 seconds (or click on it). Select NEW from the FILE menu. A window will open showing several different model names, because the same software is used for some of our pro audio models. Select DP A amp and click OK. Y ou will then be presented with 2 options NEW U ...
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Alto DPA900/1500 - page 11
10 5.5 Help File The HELP file accessible from within the PC Editor will be updated as necessary . Since software updates after the printing of this manual may affect the instructions provided here, please check the Help File for any later remarks. 5.6 Introduction to the PC Editor When you launch the editor on your PC, you will see the opening scr ...
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Alto DPA900/1500 - page 12
11 6. P ARAMETER MENUS DESCRIPTION - HUM CANCEL: allows the modification of the dynamic NOTCH filter parameters. The graph included shows the filter response curve. - NOISE GA TE: allows the modification of the noise gate parameters. The graph included shows the filter curve. - MUL TICOMP: allows the modification of the multiband compressor paramet ...
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Alto DPA900/1500 - page 13
12 8. CONNECTIONS The following diagrams show the schemes of the recommended cables and some connection examples referred to various system configurations. Inputs A & B, RS485 IN 3 1 2 GROUND HOT (+) COLD ( ) Inputs A & B GROUND HOT (+) COLD ( ) RING SLEEVE TIP BALANCED XLR-M BALANCED JACK RS232 RS232 (9-Pin) GROUND HOT (+) COLD ( ) 3 2 1 B ...
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Alto DPA900/1500 - page 14
TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 CH1 CH2 SERIAL MODEL Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk RS485 IN RS485 OUT RS232 SERIAL PORT BREAKER CH1 CH2 BRIDGE MONO OUTPUT2 OUTPUT1 POWER OUTPUTS CH1 1+ 1- POS NEG CH2 2+ 2- POS NEG BRIDGE 1+ 2+ POS NEG CH2 1+ 1- POS NEG MODE BRIDGE STE ...
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Alto DPA900/1500 - page 15
TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 CH1 CH2 SERIAL MODEL Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk RS485 IN RS485 OUT RS232 SERIAL PORT BREAKER CH1 CH2 BRIDGE MONO OUTPUT2 OUTPUT1 POWER OUTPUTS CH1 1+ 1- POS NEG CH2 2+ 2- POS NEG BRIDGE 1+ 2+ POS NEG CH2 1+ 1- POS NEG MODE BRIDGE STE ...
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Alto DPA900/1500 - page 16
TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 CH1 CH2 SERIAL MODEL Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk RS485 IN RS485 OUT RS232 SERIAL PORT BREAKER CH1 CH2 BRIDGE MONO OUTPUT2 OUTPUT1 POWER OUTPUTS CH1 1+ 1- POS NEG CH2 2+ 2- POS NEG BRIDGE 1+ 2+ POS NEG CH2 1+ 1- POS NEG MODE BRIDGE STE ...
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Alto DPA900/1500 - page 17
Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk RS485 IN RS485 OUT RS232 SERIAL PORT BREAKER CH1 CH2 BRIDGE MONO OUTPUT2 OUTPUT1 POWER OUTPUTS CH1 1+ 1- POS NEG CH2 2+ 2- POS NEG BRIDGE 1+ 2+ POS NEG CH2 1+ 1- POS NEG MODE BRIDGE STEREO LIMITER OFF ON PARALLEL OUTPUT PARALLEL OUTPUT TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 TIP/ ...
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Alto DPA900/1500 - page 18
17 10. TECHNICAL SPECIFICA TIONS MODEL 8 ohms per channel(EIAJ) 4 ohms per channel(EIAJ) 8 ohms, 1KHz, 0.1%THD Bridge Mono Mode Distortion (SMPTE-IM) Frequency Response Damping Factor , 1 kHz and below Signal to Noise,20Hz-20KHz V oltage Gain Input Sensitivity @ 4 ohms Input Clipping Input Impedance Controls DP A900/1500 40 Bit DSP Enhanced Stereo ...
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Alto DPA900/1500 - page 19
18 1 1. W ARRANTY 1. W ARRANTY REGISTRA TION CARD T o obtain Warranty Service, the buyer should first fill out and return the enclosed W arranty Registration Card within 10 days of the Purchase Date. All the information presented in this W arranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport ...
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Alto DPA900/1500 - page 20
SEKAKU ELECTRON INDUSTR Y (H.K.) CO. L TD. No.1, Lane 17, Sec. 2, Han Shi West Road, T aichung, 401 T AIW AN http://www .altoproaudio.com T el:886-4-22313737 email: alto@altoproaudio.com Fax:886-4-22346757 All rights reserved to AL TO. All features and content might be changed prior notice. Any photocopy , translation, or reproduction of part of th ...
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