R LTO OWNER'S MANUAL HPA6 6-CHANNEL HEADPHONE AMPLIFIER www.altoproaudio.com Version 2.
IMPORTANT SAFETY INSTRUCTION CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN 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. WARNING To reduce the risk of electric shock and fire, do not expose this equipment to moisture or rain. Dispose of this product should not be placed in municipal waste and should be separate collection. 11.
IN THIS MANUAL: 1. INTRODUCTION..............................................................................1 2. FEATURES.....................................................................................1 3. CONTROL ELEMENTS....................................................................2 4. APPLICATIONS...............................................................................5 5. INSTALLATION AND CONNECTION..................................................7 6. TECHNICAL SPECIFACATION..........
SP OT L IG 3. CONTROL ELEMENTS HT 5 3 INPUT LEVEL(dBu) 24 18 12 6 0 6 18 DIRECT IN 9 24 0 10 3 2 12 CLIP L MUTE R 3 LTO 5 OUTPUT LEVEL(dBu) 12 2 R 11 4 5 1 4 MAININ AUX BALANCED 5 1 AUX IN 6 0 OUTPUT GAIN HEADPHONE OUT MONO 6 0 INPUT GAIN STEREO MAIN SECTION 1 2 CHANNEL 1 7 6 4 8 MAIN SECTION: 1 DIRECT IN You can use this socket to feed and additional stereo signal into your HPA6. This socket is in "priority".
SP OT L IG 3. CONTROL ELEMENTS HT 6 MODE SWITCH Depress the switch if you want to hear a stereo signal. Press it again if you want to hear a mono signal. 7 MONO Led: When the MODE switch is engaged this Led will light up. 8 HEADPHONE OUT This connector is wired in parallel with the correspondent output connector on the rear panel. It is useful to connect headphones when your HPA6 is installed into a rack. 9 BALANCE CONTROL This knob has a double function.
SP OT L IG 3. CONTROL ELEMENTS HT Rear Panel Rated Power Consumption 40W FUSE: 210-240V: T315mAL 250VAC 95-120V: 500mA 250VAC REPLACE FUSE WITH CORRECT TYPE ONLY Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk A101 DESIGNED IN ITALY MADE IN CHINA 12 TIP/PIN 2 RING/PIN 3 SLEEVE/PIN 1 TIP: L- CHANNEL RING: R- CHANNEL MIN.
4. APPLICATIONS USING THE MAIN IN CONNECTORS First connect a signal source to the MAIN IN connectors on the rear panel of your HPA6. Set the Input Gain (Main section) and the Balance control (Channel section) on center position. Output gain of each channel must be turned down at this stage. Check the input level Meter for optimal operation as described earlier on in this Manual. Connect the headphones you want to use and start to raise the output gain of each channel for the desired listening volume.
4. APPLICATIONS Through the AUX IN inputs you can also use the 6 channels of your HPA6 independently to give individual mixers to 6 different musicians. Connect the Aux Sends or Subgroups outputs directly to the AUX IN input of your HPA6. You need a mixer with 6 Aux sends output or with 6 subgroups such as the Alto L Series mixer. Now rotate the BALANCE control on your HPA6 fully to the left. IN this way you will exclude the MAIN signal and only the AUX IN signal will be sent to the headphones.
5. INSTALLATION AND CONNECTION Ok, you have got to this point and you are now in the position to operate your HPA6 successfully. However, we advise you to read carefully the following section to be the real master of your own mix. Not paying attention enough to the input signal level, to the routing of the signal and the assignment of the signal will result in unwanted distortion, a corrupted signal or no sound at all. So you should follow this procedure for every single channel: 4.
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6. TECHNICAL SPECIFICATION AUDIO INPUT Main Input XLR and 1/4" jack RF filtered, servo balanced input 50 kOhms balanced, 25 kOhms unbalanced +21 dBu balanced and unbalanced(unity gain) typ.40 dB, >55 dB @ 1kHz Connectors Type Impedance Max. input level CMRR AUX IN and DIRECT IN input Connectors Type Impedance Max.
7. WARRANTY 1. WARRANTY REGISTRATION CARD To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date. All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to provide a more effective and efficient after-sales warranty service.
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 All rights reserved to ALTO. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this manual without written permission is forbidden. Copyright c 2007 Seikaku Group NF00893-2.
