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User's Manual
HPA6
6-Channel HEADPHONE AMPLIFIER
R
LTO
www.altoproaudio.com
Version 2.0 Dec. 2002
English
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the recommended fuse type as indicated in this SAFETY RELATED SYMBOLS manual. Do not short-circuit the fuse holder. Before replacing the fuse, make sure that the product is CAUTION OFF and disconnected from the AC outlet. RISK OF ELECTRIC SHOCK DO NOT OPEN Protective Ground This symbol, wherever used, alerts you to the pre- Before turning the product ON, make sure that it is sence of un-insulated and dangerous voltages with- connected to Ground. This is to prevent the risk of in the product encl
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PREFACE Dear Customer: Thanks for choosing LTO HPA6 6-Channel Headphone Amplifier and thanks for choosing the one of results of LTO AUDIO TEAM job and researches. For our LTO AUDIO TEAM, music and sound are more than a job...are first of all passion and let us say...our obsession! We have been designing professional audio products for a long time in cooperation with some of the major brands in the world in the audio field. The LTO line presents unparalleled analogue and digital products made by
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TABLE OF CONTENTS 1. INTRODUCTION .....................................................................................................................................4 2. FEATURE LIST .......................................................................................................................................4 3. CONTROL ELEMENTS ..........................................................................................................................4 3.1 The Front Panel 3.2 The Rear P
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1. INTRODUCTION Thank you very much for expressing your confidence in LTO products by purchasing our HPA6 6-Channel Head- phone Amplifier. With the HPA6 you have acquired an extremely musical and flexible 6-Channel Headphone Amplifier. Featuring six stereo headphone amplifiers, The LTO HPA6 6-Channel Headphone Amplifier performs a number of necessary tasks, not all of which are headphone related. The HPA6 6-Channel Headphone Amplifier provides Main Inputs on the rear panel and Direct In Input on
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1. Direct In Input The Direct In Input is used to feed the external program sources into the main signal path, comparing to the Main Input on the rear panel, this input presents the priority character. 2. Input Gain Control This control sets the input signal level coming from Main In. 3. Input Level Meter This meter tells you the level of the main input signal coming from Main/Direct In, and the range goes from -24dBu to +18dBu. 4. Aux In Input The Aux In Input is used to feed the further input
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13. Fuse holder / Voltage selector You must be sure of the Voltage available in your Country because this is a Dual Voltage Unit. Voltage operation can be changed through the fuse protecting the power supply but this operation must be performed by a qualified Engineer. 220-240V 110-120V THIS IS SET FOR THIS IS SET FOR 110V AC TO 120V 220V AC TO 240V AC OPERATION AC OPERATION Please note the triangular markers on both sides of the fuse holder ( See figure above), to change the voltage pull the fu
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4. INSTALLATION & CONNECTION 4.1 Mains Connection This is a dual voltage unit. Please ensure that the LTO HPA6 6-Channel Headphone Amplifier is set to the correct supply voltage before plugging the power cord into the wall outlet, use the same fuse as marked on the fuse holder at the AC power connection socket. Do not insert power cord into the unit until voltage has been correctly set. Do not plug the power cord into AC power until voltage has been correctly set. The mains connection of the LTO
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1 2 1 2 1 2 1 2 1 2 3 3 3 3 3 Balanced Tip Tip Ring Ring SLEEVE RING TIP TIP RING SLEEVE Sleeve Sleeve 1 1 2 2 3 3 Tip 1 Ring 2 TIP RING SLEEVE Sleeve 3 Unbalanced Tip 1 Ring 2 Sleeve 3 TIP RING SLEEVE Tip 1 2 Sleeve 3 TIP SLEEVE 1 Centre 2 3 Screen Tip Tip TIP SLEEVE SLEEVE TIP Sleeve Sleeve Tip Tip Ring Ring TIP RING SLEEVE SLEEVE RING TIP Sleeve Sleeve Tip Centre Sleeve Screen TIP SLEEVE Tip Centre Ring Sleeve Screen TIP RING SLEEVE 1 1 2 2 3 3 4.3 Rack Mounting The most secure mounting is on
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Headphone output2 Headphone output4 Headphone output6 Headphone output1 Headphone output3 Headphone output5 3 3 3 3 3 3 INPUT LEVEL(dBu) OUTPUT LEVEL(dBu) OUTPUT LEVEL(dBu) OUTPUT LEVEL(dBu) OUTPUT LEVEL(dBu) OUTPUT LEVEL(dBu) OUTPUT LEVEL(dBu) 2 4 2 2 2 2 2 4 4 4 4 4 24 18 12 60 6 12 18 24 0 12 CLIP 24 0 12 CLIP 24 0 12 CLIP 24 0 12 CLIP 24 0 12 CLIP 24 0 12 CLIP 3 L MUTE R 1 5 L MUTE R 1 5 L MUTE R 1 5 L MUTE R 1 5 L MUTE R 1 5 L MUTE R 1 5 2 4 MAIN IN AUX 0 6 HPA6 MAIN IN AUX 0 6 MAIN IN AUX
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5.3 The HPA6 in Studio Application Generally, the Aux In Inputs are used to feed a further input signal, which can be mixed with the Main/Direct In signal via Balanced Control, so that, well understood this function, you can get the wonderwork in the studio field. Normal practice, if you want to record a vocal track which is intended to ride on an already existing background musical tracks, take it easy, just use the Main Input to feed the musical background signals, and input the Vocal signal t
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6. TECHNICAL SPECIFICATIONS AUDIO INPUT MAIN input XLR and 1/4" jack Connectors Type RF filtered, servo balanced input Impedance 50 kOhms balanced, 25 kOhms unbalanced Max.input level +21 dBu balanced and unbalanced (unity gain) typ.40 dB, >55 dB @ 1kHz CMRR AUX IN and DIRECT IN input 1/4" TRS (tip=left, ring=right, sleeve=ground) Connectors Type unbalanced Impedance 25 kOhms unbalanced Max.input level +21 dBu unbalanced (unity gain) typ,40 dB, >55 dB@1kHz CMRR AUDIO OUTPUT Connectors XLR and 1/
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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 purport a more effective and efficient after-sales warranty service. Please fill out all the information carefully and genuinely, miswriting or absence of this card will
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SEKAKU ELECTRON IND. CO., LTD NO.1, LANE 17, SEC. 2, HAN SHI WEST ROAD, TAICHUNG, 401 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 2003 Sekaku Electron
