Blaupunkt V420 User Manual
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TABLE OF CONTENTSTABLE OF CONTENTS PAGEPAGE
Introduction 3
Owner's Record 3
Key features 3
Understanding your amplifier 4
Connections 5
Controls and their use 6
System design guide 7-8
Installation and safety precautions 9
Final installation 10-11
Trouble-shooting guide 12
Specifications 13
Limited warranty 14
TABLE DES MATIÈRES PAGE
Introduction 15
Archive du propriétaire 15
Caractéristiques-clé 15
Comprendre le fonctionnement de l'amplificateurer 16
Raccordements 17
Commandes et leur utilisation 18
Guide de conception du système 19-20
Installation and safety precautions 21
Montage final 22-23
Guide de dépannage 24
Spécifications 25
Garantie limitée 26
INDICE DE MATERIAS PAGE
Introduccion 27
Notas del propietario 27
Caracteristicas clave 27
Funcionamento de su amplificador 28
Conexiones 29
Controles y manera de usarlos 30
Guia de diseño del sistema 31-32
Precauciones de instalacion y seguridad 33
Installacion final 34-35
Guía para solucionar problemas 36
Especificaciones 37
Garantia limitada 38
22
INTRODUCTION INTRODUCTION
Congratulations on your purchase of the world's finest brand of car audio amplifiers. We have invested
tremendous effort in the design process of the new VELOCITY
superior musical performance. Leading edge technologies such as Distortion Limiting and high Signalto-Noise Voltage Controlled Amplifier input stages, previously found only in the professional audio sound
reproduction and enhancement market, have been implemented into your VELOCITY
For maximum performance and reliability we highly recommend that your new VELOCITY
amplifier be installed by an authorized Blaupunkt dealer. We also recommend Blaupunkt cd or cassette
units, speaker systems, and accessories to expand the listening experience which might be limited by
lesser quality components.
Finally, we remind you to practice safe listening habits using common sense. Continuous exposure to
listening levels over 100 decibels may cause permanent hearing loss. Many high power, multi-speaker
systems today are capable of Sound Pressure Levels exceeding 130 dB.
TM
series amplifiers in order to achieve
TM
amplifier.
TM
series
OWNER'S RECORD
The model and warranty numbers are located on the bottom of the unit. Please record these numbers in
the space provided below. Refer to these numbers whenever you call upon your Blaupunkt dealer.
MODEL: VELOCITYTM V420
WARRANTY NUMBER:
PURCHASE DATE:
DEALER:
INSTALLER:
OTHER INFORMATION:
KEY FEATURES
# Distortion Limiting (THDL) is entirely new to the car audio aftermarket and is used to reduce the
annoying acoustical pops and cracks present during high signal levels. It is acoustically transparent
until high signal levels drive the amplifier into distortion.
# 2 ohm stability allows for paralleling of multiple speakers for increased power output and/or
additional speakers for additional sound pressure levels due to increased cone area.
# Switchable 100 Hz high-pass filters limit the lower bass signals from entering small 3.5 or 4 inch
speakers thus better distributing the low frequency power to additional power amps for dedicated low
frequency speakers.
# Wide range input gain controls (0.3 - 6.0 V rms) allow for a variety of radio interface voltages, even
directly from the high level outputs of many factory radios.
# Independent front/rear gain controls allow for separate loudness level settings of the front and rear
speakers in the vehicle without adjusting the fader control in the radio.
# High impedance differential inputs sense noise riding on the RCA input cable center conductor and
shields and effectively subtracts the noise out of the input stage.
33
UNDERSTANDING YOUR AMPLIFIER
...WHAT IS AN AMPLIFIER?...
An amplifier, by definition, is a device that receives a small audio signal on its input and reproduces it
with larger voltages (or current) on its output. Ideally there should be no internal modifications of the
signal other than voltage or current level. If there are any changes in the signal character it is considered
a "distortion" of the input signal.
A perfect amplifier will be able to reproduce any output voltage regardless of input signal level, but this is
impossible due to upper limits created by the voltages found in a car, typically 12 - 15 volts DC. The
amplifier's output stage cannot swing voltages that exceed the upper limit commonly referred to as the
voltage "rails", as in locomotive train tracks. If the input signal is driven to high levels, the outputs try to
follow this path but crash into the "rails" thus turning musical sine waves into very unmusical square
waves. Here is where your new Blaupunkt VELOCITY
The Blaupunkt VELOCITYTM series of amplifiers have a very unique feature called Distortion Limiting
(THDL) which tolerates high input voltage levels but prevents ugly sounding distortion products common
to nearly all other amplifiers. An input voltage sensing network looks at the incoming signal and adjusts
the feed-through gain of the amplifier so quickly that high level bass notes cannot drive the amp into
distortion yet lower signal level mid and high frequencies pass through without gain modification. This is
done within milliseconds, so "gain pumping" acoustical byproducts of inexpensive audio limiters are
never encountered. Below is a visual description of a high level audio signal passing through a typical
car audio amplifier and then through the new Blaupunkt VELOCITY
TM
amplifier is uniquely impressive.
TM
amplifiers.
"DISTORTION LIMITING SIGNAL CHARACTERISTICS"
Low Volume
Typical Amplifier
0.1 Vrms
Blaupunkt with THDL
High Volume
1.0 V
rms
44
(Clipping)
Typical Amplifier
Blaupunkt with THDL
CONNECTIONS
"CONNECTION SIDE OF AMPLIFIER"
INPUTSINPUTS
+ - + -
+ - + -
LR RR
OUTPUTS
OUTPUTS
+12V
POWER
2
1
RFRR
LFLR
3
4
+ - + -
+ - + -
LF RF
OUTPUTS
OUTPUTS
5
1. TRIGGER LINE - This connection is the connection point that allows the amplifier to be switched on
from a remote location (usually the radio). When a positive voltage is applied to this terminal the
amplifier will switch on. This connection is normally made from the power antenna lead of the radio
or a dedicated trigger line. It will turn the amp on for any voltage above 10 volts. Make sure the
radio's power antenna lead is activated only when the radio is turned on.
2. GROUND LINE - This is the high current ground connection to the chassis of the car. It should be
connected to a clean ground connection in the car, capable of handling high current loads. Do not
run a wire up to the car battery ground for this line.
3. BATTERY LINE - A high current, fused line should be connected at this point with battery level
voltages (typical 12.5 - 14.5 V DC) available 24 hours a day.
4. LEFT/ RIGHT RCA LINE INPUTS - These lines connect to the RCA output jack of a radio, or
directly from the high level audio outputs from a radio. These connectors are Gold plated for
superior audio transmission and to prevent
corrosion over time.
5. SPEAKER OUTPUTS - These connections are used to connect loudspeakers with 2 ohm or higher
speaker impedance. It is imperative that these lines NOT be connected or touch the chassis of the
car in any way. Also, the (-) lead of the left channel is not electrically connected to the (-) lead of the
right channel so common grounds cannot be used. Speaker wire gauges of up to 12 gauge in size
can be accommodated by these terminals.
55
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