LTO
LTO
TM
Care & Safety Instructions
All the safety and operating instructions should be read before this product is installed and operated. We recommend
that installation be carried out by an authorized mobile electronics installation company. Please contact your local ALTO
Mobile distributor for a list of authorized installers in your area.
DO NOT DISASSEMBLE:
No user serviceable parts inside; refer servicing to qualified personnel only.
WATER & MOISTURE:
The equipment should be protected from moisture and rain, especially if mounted in the vehicle's trunk area or any location that may be susceptible to water ingress.
PRODUCT LOCATION:
The equipment should be situated so that its location does not interfere with safe driving of the vehicle. Avoid locations
close to safety air bags. Ensure proper ventilation. The product should not be situated under carpeting or in a totally
sealed enclosure. Partly enclosed equipment racks should be well ventilated, using forced air cooling fans if necessary.
Locate away from heat sources such as engine exhaust systems and coolant radiators.
POWER SOURCE & GROUNDING:
This product is designed only for vehicles with a 12 VOLT NEGATIVE GROUND electrical circuit. This product may be
damaged if used in vehicles with a 24 Volt supply or a positive ground electrical circuit.
ELECTRICAL CONNECTION:
Improper electrical wiring may invalidate the product warranty and/or the vehicle warranty. Installation should only be
undertaken by a qualified automotive electrician, preferably MECP qualified or local equivalent.
CARE & CLEANING:
Clean only with a dry cloth. Avoid sharp objects from making contact with the case.
SERVICING:
If a malfunction occurs, the equipment should be serviced only by qualified personnel. Return to the dealer who supplied
you with the unit.
Critical components should only be replaced with factory parts or recommended equivalents.
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Introduction
LTO
LTO
TM
Dear Customer,
Thank you for choosing this ALTO Mobile ADP Series Full-Range Class-D Power Amplifier. We hope you will enjoy using
this product as much as we enjoyed developing it. The ADP Series is the result of considerable research and development
in our R&D centers in Europe and the Far East. It is a very close cousin of ALTO's professional Class-D amplifier models.
We've been designing products for musicians and recording studios for a long time, so the car audio product you now
have in your hands has an unusually fine pedigree.
You have purchased a technologically advanced and powerful amplifier. Don't let its size fool you. Its very high efficiency
means that, unlike a conventional Class-AB amplifier, it doesn't require a large, heavy heatsink to dissipate heat. Instead,
far more of the power going in is sent out in the form of acoustic power to drive your speakers. If your new ADP power
amp used conventional circuitry, it would be at least three times the size and four or five times heavier. So you could say
it really is a 'little monster' of an amp!
If you have not had your new amplifier installed in your vehicle, that is obviously the first thing you will need to do. We
strongly recommend that you have the unit professionally installed by a specialist company authorized by the ALTO Mobile
distributor in your country. The installation instructions in this manual are not intended to be a thorough explanation of
all the steps involved in correctly fitting this unit. The instructions assume that the person installing the equipment has
been trained to carry out such work.
You are an important member of our team. We listen to what our customers say and take on board their suggestions. It
is this feedback that helps us create the products you want. So if you have any comments, please let us know via email
to "feedback@altomobile.com".
THE ALTO MOBILE TEAM
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LTO
LTO
TM
Drawings Showing the Front and Rear Panels
INPUT OUTPUT
CH2CH1
11 22
FREQ.
HP/FLAT/LPGAIN
CH 1. 2 CH 1. 2
55
66
CH2CH1
POWER INPUT
GND
REM
33
12V
FUSE
44
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Installation & Setup Instructions
LTO
LTO
TM
Mounting the Unit
Your ADP Series Power Amplifier has two fixing 'ears' at each side, allowing it to be firmly screwed to a suitable surface.
It may be mounted vertically or horizontally, but avoid mounting the unit upside down (suspended from a shelf, for example)
since this may affect efficient heat dissipation. Do not mount the unit under carpeting or within a small sealed enclosure,
as this will prevent proper ventilation. Take care not to mount the unit where it may become wet or subject to damage
from items placed in the trunk area.
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Signal Inputs
The Left and Right Channel input terminals are standard unbalanced phono type sockets. Connect the low-level preamplifier output cables from your car radio/cassette player, CD/receiver or other device (active crossover network or
ALTO Mobile digital processor, for example) to the Input terminals of your ADP amplifier.
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Speaker Outputs
Connect suitable cables (not supplied) from the Output terminals of your ADP amplifier to your speaker inputs, taking
care to ensure correct + / - polarity. Use the correct size Allen Key to tighten the screws of the speaker terminals.
IMPORTANTIMPORTANT
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Power, Ground and Remote Switch-On Terminals
The amplifier must not be run with any of its output channels open (i.e. not connected to a speaker).
Running the amplifier in this way for even a short time can cause permanent damage.
Caution: Before making any connections, you should disconnect power from the battery to avoid accidental short-circuits.
The conventional way is to disconnect the Negative terminal of the battery, but beware - this action will disconnect power
from all electrical items in the vehicle, including:
a. the cassette or CD player (which may require a code number to reactivate it. Do you know the code?)
b. the security system (which may trigger and sound an alarm from its back-up battery. Do you know how to override the
alarm system?)
c. Memory modules (which may suffer memory loss if disconnected for too long).
If you have any doubts, you should seek professional assistance.
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