/
tt Audio Amplifier with
Noise Reduction
Ampri
audio
de
distorsiun THD
4 x 40
+
2 x 80 +
et
R6duction
1 x
20 Watts
avec
de bruit HUSH@
limitation
Ampfificador de audio 4 x 40 + 2 x 80 + 1 x 20 vatios con
ci6n
de
distorsi6n THD
Made in the U.S.A.
y
Reduccidn
de Ruidos HUSH@
Bosch Group
TABLE OF CONTENTS (ENGLISH)
PAGE
Introduction, Owner’s record, and key features
Velacity
Installation and safety precautions
Amplifier controls and operation
Amplifier connections and interface
Speaker configurations
Recommended system configurations (4)
Final installation (Mounting and ventilation, use of internal crossovers, fusing,
Trouble-shooting guide
Limited warranty (United States)
Accessories
Other notes
Technical specifications
Introduction, Archive du proprietaire,
Velocity comprendre le fonctionnement de I’amplificateur (caracteristiques de limite de distorsion
Montage et mesures de
Commandes de I’amplificateur et fonctionnement
Raccordements de I’amplificateur et interface
Configurations de speaker
Configurations des
Montage final (Montage et ventilation
Guide de
Garantie limitee @tats Accessoires
Autres notes
Specifications
amplifier features (Distortion Limiting, HUSH noise gating and reduction,
Voltage Controlled Amplifier’s)
power and speaker wiring)
caracteristiques-cl6
de signal, reduction de bruit HUSH et filtre de
securite
systemes
croisements internes et des
depannage
(4)
adequats,
commances
Unis)
.
Porte
d’expansion descendante, VCA)
interface du signal d’entree, utilisation des
d’intensite, mise a la masse,
fusibles)
3
4-6
7
8
9
10
11-14
15-17
18
19
54
54
55
20
21-23
24
25
26
27
28-31
32-34
35
36
54
54
55
INDICE
Introduction,
Characteristics del amplificador \(e/oc;ry
Precauciones de instalacidn y seguridad
Controles y operation del amplificador
Conexiones del amplificador e interfase
Configuraciones del speaker
Configuraciones recomendadas del sistema (4)
lnstallacidn
Gula para
Garantia limitada (EE. UU.)
Accesorios
Otras
Especificaciones
DE MATERIAS
archive del del propietario, caracteristicas del amplificador Velocity
y reduction de ruido HUSH, amplificadores de voltaje controlado, configuraciones)
final (Montaje y ventilaci6n adecuados, uso de truces internos, fusibles apropiados,
cableado
de alimentacidn y de
solucionar problemas
Notas
(ESPAfiOL)
(Limitaci6n
10s altavoces)
de
distorsion,
circuit0 de conduccidn
2
37
selectiva
38-40
41
42
43
44
45-48
49-51
52
53
55
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
to achieve superior musical performance. Leading edge technologies such as Distortion Limiting
and
HUSHTM
reproduction and enhancement market, have been implemented into your
which has been designed and assembled in the United States of America. For maximum
performance and reliability we highly recommend that your new VELOC/w”’ series 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
noise reduction and gating, previously found only in the professional audio sound
VELOC/TT”series
VELOCITYT”
amplifiers in order
amplifier
dB.
. .
OWNER’S RECORD
del and warranty numbers are located on the bottom of the unit. Please record these
s in the space provided below. Refer to these numbers whenever you call upon your
Blaupunkt dealer.
MODEL:
WARRANTY NUMBER:
PURCHASE DATE:
DEALER/INSTALLER:
KEY FEATURES
DISTORTION LIMITING (THD,) reduces the annoying acoustical pops and cracks present during
high signal levels. It is acoustically transparent until high signal levels thus providing protection
for tweeters since high level distortion products are not allowed to enter the speakers.
HUSHTM
hiss that may be picked up in the installation or from recorded music played back via AM, FM,
or even compact disc.
MULTI-MODE SPEAKER CAPABILITY allows the consumer to cost effectively create a
satellite/subwoofer system with remarkably good performance from a single amplifier.
REMOTE GAIN AND HUSH CONTROLS are available using the optional remote control, RM-1.
This remote can change gains of the entire system (multiple amplifiers) or only a subwoofer
amplifier if so configured.
TONE AND BASS BOOST CONTROLS provide frequency response tailoring for the end listener
that cannot be achieved from the radio controls.
NOISE GATING AND REDUCTION offers tremendous noise reduction for background
1 OHM STABILITY allows for paralleling of multiple speakers for increased sound pressure level.
CONTINUOUSLY VARIABLE HIGH-PASS/LOW-PASS CROSSOVERS allow you to better
istribute amp power thus lowering system distortions and increasing system sound loudness.
IDE RANGE INPUT GAIN CONTROLS (0.3 - 6.0 V
voltages, even directly from the high level outputs of many factory radios.
rms)
allow for a variety of radio interface
3
UNDERSTANDING YOUR AMPLIFIER’S FEATURES
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 VELOCIWTMamplifier is
uniquely impressive.
4
The Blaupunkt
VELOCITYTM
series of amplifiers have a very unique feature called Distortion Limiting
(THD,) 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 throu
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
VELOCITYTM
amplifiers.
DISTORTION LIMITING SIGNAL CHARACTERISTICS
Low Volume
Typical
Amplifier
High Volume
;FII+
jz++
BlaupunM
6/8upunkt
with
Typical Amplifier
with THIX
TH[x
HUSHm
High quality compact discs provide very wide range volume levels with low background hiss levels.
Unfortunately, the car is a very noisy electrical environment so vehicle noises (pops and alternator
whine) often creep into the audio signal somewhere in the installation. Although mid and high level
music tends to mask background noises, vehicle noises become quite audible, and annoying, during
quiet music passages. This problem has been known for some time in the professional audio field
so a device known as a “Noise Gate” has been used to mute the signal path during quiet passages.
The problem with this system is the “choppy” sound as the Gate opens and closes with music
which is known as “pumping”.
The
which effectively expands the dynamic range of the signal thus pushing down the background
noise in relation to the desired signal. Also, the
point that smoothly moves up and down so none of the dramatic “pumping” of the desired signal is
experienced as with a noise gate. An added benefit is the ability of the
noise on recorded music such as cd’s, cassettes, and even on the AM/FM car radio.
NOISE REDUCTION AND DOWNWARD EXPANSION GATING
HUSHTM
noise reduction circuits avoid this “pumping” by the use of a downward expander
HUSHTM
INPUT/OUTPUT ELECTRICAL TRANSFER FUNCTION
circuits offer a continuously variable set
HUSHTM
circuit to reject
VERY LOW
MUSIC SIGNAL
LOW LEVEL
MUSIC SIGNAL
MID
LEML
MUSIC SIGNAL
OUTPUT
SIGNAL
-80
OUTPUT SIGNAL
SIGNAL TO NOISE CHARACTERISTICS
OUTPUT SIGNAL
-60
-40 -20
OdB
5
VCA’s
Used in Professional Audio for some years, but totally new to the car audio world, is a remote
control gain devices called a “VCA”. This is a small integrated circuit that can control the feed-
through gain of a circuit from a remote location. It operates much like an external “hand” that
controls the signal flow through a circuit, much like a simple water flow valve.
(Voltage Controlled Amplifiers) & ELECTRICAL PIN-OUTS
VCA CONTROL VOLTAGE
SIGNAL
VCA OPERATION
Many people want to have a remote control for a high power amplifier in order to control the
loudness of a subwoofer amplifier independently of the radio. Remote mounting of an input gain
control would be a major problem with most car audio amplifiers because of the likely noise
intrusion into the signal path.
With a VCA circuit on the input of an amplifier, the gain can be controlled remotely but is done
with moderate level DC voltages (O-1 5 volts) that are insensitive to noise (noise is an AC voltage).
Using the optional Blaupunkt remote control (RM-1) you simply plug the remote into the amp to
control the overall gain. For people wanting to interface with highly custom installations, you can
use an RJ-11 telephone jack and variable resistor to achieve similar results using the circuit below,
This is & recommended for very experienced Blaupunkt installation centers for it may void the
warranty of the amplifier otherwise.
INWTS
------+
I-
/J
I
OdB
-20
-40
-60
-80
-100
m
-100
VCA TRANSFER FUNCTION
-80
-60.
+
-40
CONTROL
VOLTAGE
-20
K
THDL
LIMITING
ode
6
l -
REMOTE GAIN
CONTROL
ELECTRICAL
PINOUT
. ..--
INSTALLATION AND SAFETY PRECAUTIONS
!! WARNING !!
8
ALWAYS DISCONNECT THE (+I LEAD FROM THE BATTERY OF THE
VEHICLE BEFORE DOING ANY INSTALLATION WORK!
8
DO NOT INSTALL THIS UNIT IN THE ENGINE COMPARTMENT!
8
DO NOT RUN WIRES UNDERNEATH OR OUTSIDE THE VEHICLE!
!! SAFETY PRECAUTIONS !!
._
nalyze
the mounting location carefully to avoid damaging gas tanks, electrical wires, and/or
draulic lines.
2.
Every effort should be made to provide adequate ventilation, protection from engine heat, direct
sunlight, rain, and dirt.
3.
This unit is designed for use only with 12 volt DC negative ground
4.
This unit is NOT designed for use with common ground speakers. All speakers MUST be
connected to both positive and negative terminals.
5.
Fuse the +
Fuse the line as close to the battery as possible. Always use the fuse supplied with this amp
and never increase the fuse size (for example, 10A) in case it does blow.
6.
Be sure all power grounds are clean.
7.
Make wiring connections from one component to the next, making sure that you plug radio or
equalizer outputs to amplifier inputs and not outputs to outputs.
8.
Do not run power cables and audio (RCA) cables together. You can minimize noise radiation by
running the power cables on one side of the car and the signal cables on the opposite side.
12V
lead of the amplifier before making any electrical connections in the vehicle.
Scrape off paint if necessary to guarantee this.
vehiclt
systems.
9.
Avoid sharp edges and door jambs when running the wires.
be used protect the wires when they are routed through holes.
10. Make sure all wire connections are secure and protected so there is no danger of nicks or
pinched electrical lines.
11. FOR SAFE DRIVING keep the listening levels low enough not to mask outside noises.
12. Avoid playing your car audio system for long periods of time at high listening levels when the
engine is not running. This will prevent unnecessary battery drain.
Electrical tape or grommets should
7
AMPLIFIER CONTROLS AND OPERATION
1.
CROSSOVER FREQUENCY CONFIGURATIONS
reproduces all frequencies heard by humans.
(bass) comes out of the speakers.
crossover frequency setting is sent to the speakers.
2.
CROSSOVER FREQUENCY SETTINGS
amplifier can be continuously variable within the frequency limits shown
control operates in both the LP (low-pass) and HP (high-pass) modes.
3.
INPUT GAIN CONTROLS - This control matches the radio or preamp output voltage to the
In the HP (high-pass) position, only information above the
-
The internal crossover frequency control setting of the
amplifier’s input voltage so that full output can be achieved. Most radios provide only
output at their RCA leads. Turning the control clockwise makes the amp play louder. Technically
speaking, this is the voltage needed on the input of the amplifier in order to drive it to full output.
-
In the full-range mode
In the LP (low-pass) position, only low frequency
(5-50,000
Hz) the amp
_
(20-220
Hz). This
05l.OV
3
rms
4.
412 SATELLITE CHANNEL MODE SELECT SWITCH
should be in the
be in the
5.
2/l
should be in the
be in the
6.
DISTORTION LIMITING ON/OFF - When turned on, this control enables the THD, circuit. When
[21
SUBWOFER CHANNEL MODE SELECT SWITCH
ill
f41
position. To bridge channels for higher power operation, this switch should
position.
121
position
position. To bridge channels for higher power operation, this switch should
-
For 4 channel operation this switch
-
For 2 channel operation this switch
switched ON the circuit greatly reduces all distortion products at high levels but is electrically
transparent at all other listening levels. In the OFF (bypass) mode, the distortion limiting feature
is disabled so typically unwanted clipping harmonics pass on to the speakers.
7.
LEFT FRONT & RIGHT FRONT I MONO
of a radio, or directly from the high level audio outputs from a radio.
mode these are LF & RF.
8.
LEFT REAR & RIGHT REAR 7 MONO [R] INPUTS - These lines connect to the RCA output jacks
In the 2 channel mode the input marked [L] drives the 2 CH [L] output.
of a radio, or directly from the high level audio outputs from a radio.
mode these are LR
9.
LEFT 81 RIGHT
&
/
MONO SUBWOOFER INPUTS - These lines connect to the RCA output jacks of a
In the 2 channel mode the input marked R drives the 2 CH [R] output.
RR.
radio, or directly from the high level speaker outputs from a radio.
[Ll
INPUTS - These lines connect to the RCA output jacks
In the 4 channel satellite
In the 4 channel satellite
In the 2 CH mode these are L
and R. In the 1 CH mode the L jack becomes the only input but drives both speaker outputs.
10. EXTERNAL CENTER CHANNEL INPUT - If a dedicated center channel signal is desired, it will be
sent in over this RCA jack. The
INTIEXT
switch must be in the EXT position for this to work.
11. INTERNAL/EXTERNAL SUBWOOFER INPUT - The subwoofer signal will be derived from the four
RCA inputs unless this switch is in the EXT position where it must have external signal inputs to
operate.
,0
12. INTERNAL/EXTERNAL CENTER CHANNEL INPUT
-
The center channel signal will be derived
fr@
the LF and RF front RCA inputs. In the EXT position it must have external signal inputs to
operate.
.
8
AMPLIFIER CONNECTIONS AND INTERFACE
. .
1.
GROUND LINE - This is the high current ground connection to the chassis of the car. It should be
fastened 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. It should remain less than 3 feet in length
(Imeter).
2.
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.
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.
FUSES - These fuses are only for catastrophic situations should the amplifier begin to self
destruct. Another fuse should be located at the batterv before a run of wire is run the length of
the car to the remote location of the amplifier.
5.
REMOTE CONTROL INPUT - This amplifier has the capability to have its SU8WOOFER channel
gain changed from a remote gain control (optional) and uses a standard RJ-1 1 telephone jack
for interface. The HUSH control on the remote controls the HUSH noise reduction for the
Satellite and Subwoofer channels.
6.
SUBWOOFER SPEAKER OUTPUTS - These connections are used to connect loudspeakers with 1
ohm or higher speaker impedance in the 7 channel mode. If any channels are placed into bridge
mode, speaker loads seen by these channels should NOJ be less than 4 ohms impedance.
Please be sure to note the proper wiring polarity ( + and - ) and take care to verify the proper wire
configurations for bridge mode operation. It is imperative these speaker lines NEVER be
connected or touch the chassis of the car in any way! Speaker wire gauges of up to 8 gauge in
size can be accommodated by these terminals.
CENTER CHANNEL SPEAKER OUTPUT - These connections are used to connect the Front-Center
7.
channel loudspeaker with 2 ohm or higher speaker impedance.
Please be sure to note the proper
wiring polarity ( + and - ). It is imperative that these lines NOT be connected or touch the chassis
of the car in any way!
SATELLITE SPEAKER OUTPUTS - These connections are used to connect loudspeakers with 1
8.
ohm or higher speaker impedance. If any channels are placed into bridge mode, speaker loads
seen by these channels should
NOT
be less than 4 ohms impedance.
Please be sure to note the
proper wiring polarity ( + and - ) and take care to verify the proper wire configurations for bridge
mode operation. It is imperative that these lines NOT be connected or touch the chassis of the car
in any way! Speaker wire gauges of up to 8 gauge in size can be accommodated by these
terminals.
SPEAKER CONFIGURATIONS
Many audio systems can be generated from the flexible input and output configurations of this
amplifier. The three most common include the following: 716 MULTI-CHANNEL SYSTEM MODE-
615
CHANNEL HIGH SUBWOOFER POWER MODE;
Possible in-car configurations will be covered elsewhere in this manual.
7 CHANNEL MODE
(Full Multichannel System)
413
CHANNEL HIGH SYSTEM POWER MbDE.
,cwonal
csn,er
Channel,
6315
CHANNEL MODE
(High Subwoofer Power)
413
CHANNEL MODE
(High System Power)
_
SYSTEM CONFIGURATIONS
(#l
OF 4 RECOMMENDATIONS)
SATELLITE/SUBWOOFER USING INTERNAL_ INPUTS (7 channel high-pass/low-pass)
One of the most difficult decisions in amplifier usage is an optimized power amplifier configuration.
The Blaupunkt
most easily understood is the
VEf_OC/rV”” V7000
SatellitelSubwoofer
amplifier has the versatility to offer multiple installations but the
configuration. By breaking the audio spectrum (20
-
20,000 Hz) into two parts (e.g., above and below 100 Hz) amplifier power and associated loudspeakers
can be better proportioned to the needs of most music.
The obvious benefit in this configuration is minimum installation complexity and generally high
1
performance. You simply run 4 RCA cables from the radio back to the amp, install a good set of
satellite and subwoofer speakers, and then play loud! Minimum installation space is required and a
center channel speaker can be easily connected if the vehicle allows for such an installation.
END VIEWS OF SINGLE
V7000 AMPLIFIEF
/
SYSTEM CONFIGURATIONS
H#2
OF 4 RECOMMENDATIONS)
SATELLlTElSUBWOOFER
USING EXTERNAL INPUTS (7 channel high-pass/low-pass)
For those people wanting greater flexibility in frequency or signal level tailoring, you can insert active
crossover networks between the radio and amplifier. Although the internal crossovers in the
V7000
amplifier offer tremendous flexibility, the user may wish to add dedicated crossovers for tweeters, for
example, that fall outside the crossover frequency limits inside the amp. Although this is rarely used
but for competition vehicles, and noise problems can be interjected due to additional cabling, it is
possible to easily add such devices.
END VIEWS OF SINGLE
V7000
/
AMPLIFIEF
12
SYSTEM CONFIGURATIONS
(#I3
OF 4 RECOMMENDATIONS)
.
HIGH POWER “COMPETITION” CONFIGURATION (2 amplifiers in
Although the standard configuration power of this amplifier is adequate for nearly any listener
satellite +
installing two
(4xlOOW
2x8OW
subwoofer), some people may wish for increased sound pressure levels.
V7000
satellite +
amplifiers in
2x2OOW
subwoofer +
413
channel bridge mode, a high power system can be achieved
2x2OW
center channel). Such an installation will most likely
413
channel mode)
(4x4OW
By
be done by the “competition user” who is placing their car in a listening contest, but such power levels
are
becomming
common in average vehicles,
This configuration is achieved easily by configuring both amps in their respective bridge modes. The
LFlRF
line RCA outputs of the radio are connected to the first amp, and the
LR/RR
line RCA outputs
of the radio are then connected to the second amp. The two center channels are available for vehicles
that can accept such a speaker.
END VIEWS OF SINGLE
V7000
AMPLIFIEF
/
I
.
END VIEWS OF SINGLE
\
V7000AMPLlFlEF
SYSTEM CONFIGURATIONS
(#4
OF 4 RECOMMENDATIONS)
“FRONT STAGE/REAR FILL” HIGH POWER CONFIGURATION
For many listeners, they are looking for a simple “Front Sound Stage” with “Rear Sound Fill” and a
dedicated subwoofer. Live music dictates that the main speakers providing a “Sound Stage” for
listening be in front of you and this normally requires the most power be in front as well. Rear
speakers are usually only used for “Fill” information to give the vehicle a spacious sound.
Using the power normally found inside the radio (2x15 watts or so) to power the rear satellite
speakers, the
and the subwoofer. This is a very good setup for those wanting higher sound pressure levels than
using the
V7000
amp can then be used to supply the high power for the front satellite speakers
V7000
in its basic 7 channel mode, but not wanting additional amplifiers.
-
2 X
15W
High L wel Speaker Outputs
(4/3
channel mode)
1
ENt
I\
/lEWS
OF SIN
CC
I
AMPLIFIEF
v70
L
CONTROL
/
1 mw
14
FINAL INSTALLATION
.
Proper installation of your amplifier should also address several areas; adequate mounting and
ventilation, proper signal input interface, correct use of internal crossover networks, “clean”
power/ground wiring, proper fusing, and power/speaker wiring.
ADEQUATE MOUNTING AND VENTILATION
Inevitably this amplifier will be mounted in locations with limited space. If possible, try mounting the
amplifier on a vertical surface with the fins up/down for best vertical air movement. The mounting
screws supplied with this unit should be used for the most secure installation.
SIGNAL INPUT INTERFACE
This amplifier can accept input signals up to 6 volts rms over the RCA input jacks.
signal capabilities, people may want to interface the high level output of a radio
of the amplifier.
center conductors of the RCA jacks. One common signal ground reference wire is connected from the
radio chassis to the shields of the RCA lines connecting to the amplifier input.
This can be easily done by connecting the
“+”
lines of the two speaker outputs to the
High or Low Level Signal Input
“HIGH LEVEL CHASSIS GROUND
Due to high input
(24
Vrms) to the input
“LOW LEVEL AUDIO
RCA LEADS
t
RR-
USE OF INTERNAL CROSSOVERS AND TONE CONTROLS
Internal active crossover networks allow for this amplifier to be configured in three possible modes;
OFF (FULL-RANGE) disables the crossover so
PASS) passes only frequencies above the crossover control setting, and LP (LOW-PASS or
SUBWOOFER) passes only frequencies below the crossover control setting. In the LP
(SUBWOOFER) mode the slope of the crossover is 12
at the higher end of the control
male voices from sounding bad if the control setting is set up around the 220 Hz value.
LP (LOW PASS) CROSSOVER
I
I
r
-.
\\
/4
12 dB
OCTAVE
\
’
pe’
(0220
Hz), the slope approaches 24
&l
frequencies pass through the amplifier, HP
dB/octave
at low frequencies (@ 20 Hz), but
OdB
-12
-24
-36
dB/octave.
1_
-3
/I
This prevents
ssow
/
/
/
‘.
/
,/
I2 dB per
OCTAVE
, -
(HIGH-
1
I
/
“CLEAN” POWER AND GROUND
Unfortunately, the number of electronic devices in the car has grown such that care must be taken to
properly install the power and ground connections of the amplifier in order to prevent overloading the
charging system of the vehicle or interjecting noise. Currents are high enough that a dedicated power
line should be run directly to the battery of the car, but not to the vehicle’s alternator output. This line
should
fuse immediately at the battery. The ground terminal of the amplifier should be terminated at the
other end to a clean metal on the chassis of the car.
Noise can enter over the battery power line, power ground, or most commonly over the RCA signal
input lines. The amplifier has very high rejection to noise coming in over the heavy power line so most
noise intrusion is via the ground connections and/or RCA input leads. Although this amplifier has
Differential Inputs at the RCA leads, noise can still enter the shields of the RCA cables if these are run
near noise producing objects such as engine or braking system computers. More common is
alternator whine generated from ground point voltage differences due to component connections
throughout the vehicle (voltage ground loops). The best installation design to prevent this condition is
done using a “star” grounding scheme (shown below) to ensure a common ground point for all stereo
components.
I
noJ
be run to a fuse on the factory fuse panel of the car but directly to the battery with its own
_
Radio
Equalizer (Optional)
“Star” Ground
RCA LEADS
PROPER FUSING
This unit will operate over a range of 1 O-l 8 volts DC. A high current fuse should be installed in-line
with the amplifier(s) immediately at the battery to prevent vehicle damage should the battery line be
inadvertently shorted to the vehicle chassis. The chart below shows recommended master fuse
sizes for an average audio system with the noted audio power levels.
FUSING CHART*
FUSE SIZE FOR TOTAL SYSTEM AUDIO POWER (max output level)
50 w
(4 A rms) (8 A rms)
IOOW
200 w
(16 A rms) (40 A rms) (80 A rms)
500 w 1000 w
FUSE SIZE 15
tin Amperes)
*
Standard fuse sizes commonly used in the automotive world today. Fuse size should exceed the maximum current
draw expected to accommodate music transients. (Current draw above reflects a minimum system voltage of 12.6
dc at the amplifier with current values for maximum current draw with music signals.)
20 30 50
.
16
100
POWER WIRING
Most automobiles built in the last 10 years have adequate current capability for your Blaupunkt
amplifier. Except for systems above 500-700 watts, the factory charging system and battery
should comfortably power your audio system.
Care should be taken in the choice of wire to ensure adequate current delivery to the amplifier.
Wire diameter size (gauge) is an important factor for high power audio systems. The main battery
cable size needs to change with audio power demands. The amplifier power and length of wire run
determine the wire size that is needed. Wire diameters larger than those shown below offer limited
sonic improvements for the given increased wire cost.
Wire diameter must increase (decreased wire gauge number) for higher power systems. For
amplifier installations long distances from the car battery, the wire diameter needs to increase
(decreased wire gauge number). The power wire sizes below are sizes that allow for a maximum of
0.5 Volts DC voltage drop over the given wire length (this power line voltage drop is virtually
inaudible at the speakers and will not cause problems with your Blaupunkt amplifier).
POWER AND GROUND WIRING CHART*
WIRE LENGTH
(feet / meters)
/
b
5 ft. / 1.5 m
10 ft. / 3.0 m
15 ft. / 4.5 m
20 ft. / 6.0 m
25 ft.
17.5
m
30 ft. / 9.0 m
WIRE GAUGE FOR TOTAL SYSTEM AUDIO POWER
50 w 100 w 200 w
(4
A
rms)
16 12
16 12
14 12
14
12
12
(8 A
12
IO
10
rms)
(16
A
rms)
10
10
10
IO
8
8
500 w
(40
A
8 4
8 4
6
6 2
4
4
(max
output level)
rms)
1000 w
(80
A
2
0 or 00
0 or 00
rms)
+
American Wire Gauge Sizes (A.W.G.) for amplifier power and ground leads. This chart reflects maximum voltage drop
of 0.5 V dc over the given wire length. (Current draw above reflects a minimum system voltage of 12.6 V dc at the
amplifier with current values for maximum current draw with music signals. Wire gauge numbers are also inflated by 2
gauge sizes to compensate for voltage drops in connectors.)
SPEAKER WIRING
As with power wire, speaker wire size (gauge) changes with the power required and the length of
the wire run. The chart below is for a single channel output of an audio amplifier driving a
loudspeaker at a given distance with a maximum of 0.5 dB power loss over the wire.
LOUDSPEAKER WIRING CHART*
WIRE LENGTH
(feet / meters)
5 ft. / 1.5 m
10 ft. / 3.0 m
15 ft. / 4.5 m
20 ft. / 6.0 m
25 ft. / 7.5 m
4
,O
ft. / 9.0 m 18 16
WIRE GAUGE FOR TOTAL SYSTEM AUDIO POWER (max output level)
low
20 18
20
18 16
18 16
18 16
20 w 50 w
16
18
16
16
16
16 14
16
100 w
16
16
16 14
16 14
14
200 w
16
16
12
12
+
American Wire Gauge Sizes (A.W.G.) for
(well below the threshold of audibility) over the given wire length.
paired
speaker wires. This chart reflects a maximum power drop of 0.5
dB
TROUBLE-SHOOTING GUIDE
GYMPTOM
. No power
light is off)
!.
Power but no sound (blue
remote turn-on light is on)
I.
No sound from one channel
or entire side
1.
Very low sound level
1.
Power amplifier turns on and off 0
repeatedly (Motor boating)
i.
Amp sounds fine but gets
very warm to the touch
‘.
Amplifier turns off during
loud passages or is distorted l
I.
Amplifier turn-on/off pops or l
noises
I.
Crackling noise on AM and FM l
radio, but not on tape or cd.
Varies with accelerator but is
present at all times.
(This is “radiated” noise)
IO. Whining noise (alternator whine) l
occurs while engine is running l
and varies in pitch with engine
speed (this noise VARIES with . . 0
radio’s volume setting}.
I
1. Whining noise (alternator whine) l
occurs while engine is running
and varies in pitch with engine
speed {this noise DOES NOT .
vary with radio’s volume
setting}.
(blue
remote turn-on l
PROBABLE CAUSE & SOLUTIONS
Check connections to the amplifier’s + 12 volt, Ground, and remote lines
.
.
.
.
l
0
.
.
.
.
.
.
.
.
0
.
l
.
.
.
.
.
.
0
0
Verify the appropriate voltages are at their terminals (1 l-1 5 VDC).
Check the main power connection at the battery.
Check fuse in power line. If fuse is blown, replace it. If it continues to
blow, see your Blaupunkt dealer.
Disconnect all speakers and try to power up unit. If it now turns on, a
speaker short is probable.
Check all RCA input cables and speaker output cables.
Test the speaker with a VOM to verify > 1 ohm loads per channel.
Check radio balance and fader control positions.
Check loudspeaker connections.
Check cd changer connections (if applicable).
Check radio balance and fader control positions.
Check amplifier’s input gain control setting - adjust for higher output
levels if possible.
Head unit may have extremely low output voltage. A step-up voltage
Make sure connections at battery are tight.
Check battery voltage at amp using VOM; it should be 1 l-1 5 VDC.
Check all radio and amplifier ground connections.
Input gain control is set too high; lower input level accordingly.
Verify that speaker load impedances are > 1 ohms per channel.
Verify that the mounting location allows for free air movement around
amp. The largest area should be above the unit since heat rises.
Input stage being severely overdriven. Lower input gain.
Verify that speaker load impedances are > 1 ohms per channel.
Verify that one of the speaker outputs is not shorted to the chassis of
car.
Disconnect the RCA input lines to the amp and turn amplifier unit on and
off via the Trigger line. If pop goes away, the amp is turning on faster
than the time required for the radio outputs to settle down. A turn on
delay line may be needed.
If the noise persists, disconnect the Trigger line from the head unit and
try connecting directly to the battery. If the noise goes away, use a
to switch the trigger line from the clean power source.
Make certain the problem is “radiated” noise by placing a portable FM
radio near the car engine. If noise is picked up, then it is an automotive
problem and not your system.
Make sure the spark plugs and wires are <2 years old; otherwise
replace.
Verify that the engine block is grounded to the car chassis, not paint.
Verify the hood is ground to chassis. If not, purchase a flexible metal
strap, scrape off paint at the connections, and screw into place.
Check power connections to be sure they are clean.
Reroute power to the radio so that it runs directly from battery bypassing
battery terminal in fuse box.
Check ground connections to be sure surfaces have been scraped clean
for good connections.
Check battery ground connection at chassis to make sure it’s clean and
tight. Verify that all connections are scraped clean of paint, rust, or
grease.
Check radio and amp connections; you may have to relocate amplifier
ground to same point as radio ground.
Bypass all equipment between radio and amp
connect directly to amp. If problem goes away, reinsert each componerr
until noise reappears. Logic shows this part is the problem.
Check for “high level ground loops”; turn off and disconnect unit
grounds, one at a time, except for the power amp. Turn system back on
and check for noise after each ground is removed.
Check for RCA shield “signal level ground loops” by disconnecting th
shield of the RCA cable at one end. If noise disappears modify cable
accordingly.
(e.g.,
equalizers, etc.) and
the
the
relay
18
LIMITED WARRANTY (UNITED STATES)
Robert Bosch Corporation warrants new Blaupunkt audio products’and accessories it distributes in
the United States through authorized Blaupunkt dealers, or which are imported as original vehicle
equipment by the automobile manufacturer, to be free from defects in material and workmanship,
in accordance with the following:
For twelve
amplifier and replace any accessory which under normal conditions of use and service proves to be
defective in materials or workmanship at no charge to you. However, this warranty does not cover
expenses incurred in the removal or reinstallation of any amp or accessory whether or not proven
defective and does not cover products not purchased from an authorized Blaupunkt dealer.
To obtain performance of this warranty, contact the nearest Blaupunkt authorized repair facility or
our nearest office. A dated purchase receipt or other proof that the product is within the warranty
period will be required in order to honor your claim. Carefully pack the unit and ship prepaid to the
servicing location. For further information, contact your local Blaupunkt retail dealer.
This warranty is limited to the original consumer purchaser and is not transferable. Specifically
luded
allation,
electromagnetic interference.
To the extent allowed by law, this warranty sets out your exclusive remedies with respect to
products covered by it, whether for negligence or otherwise. We will not be liable for
consequential or incidental damages, losses, or expenses. THIS WARRANT? IS IN LIEU OF ALL
OTHER EXPRESS WARRANTIES. ANY WARRANTY IMPLIED BY LAW, WHETHER FOR
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE, SHALL BE
EFFECTIVE ONLY FOR THE PERIOD THAT THIS EXPRESS WARRANTY IS EFFECTIVE. No attempt
to alter, modify, or amend this warranty shall be effective unless authorized in writing by an officer
of Robert Bosch Corporation.
(12)
months after delivery to you, the original consumer purchaser, we will repair any
from this warranty are failures caused by misuse, neglect, abuse, improper operation or
dropping or damaging the faceplate, or unauthorized service or parts. Also excluded
this warranty is the correction of improper installation and the elimination of any external
Some states do not allow limitations on how long implied warranties last, or the exclusion or
limitation of incidental or consequential damages, so the above limitations or exclusions may not
apply to you. This warranty gives you specific legal rights and you may also have other rights
which vary from state to state.
NOTICE TO CALIFORNIA OWNERS
If your Blaupunkt car audio product needs warranty repair service and there is no authorized service
center reasonably close to you, you can return the defective unit to the dealer from whom you
purchased it. Or you can return it to any dealer who sells Blaupunkt products. The dealer may
repair or replace the unit, or, if returned to the dealer from whom purchased, he may partially
refund your money, you may take your Blaupunkt unit to any repair shop and they can repair your
unit at our expense unless the repair cost exceeds the depreciated value of the unit, but you must
contact Blaupunkt to receive authorization to do this before your unit is repaired.
ROBERT BOSCH CORPORATION
BLAUPUNKT DIVISION,
2800 SOUTH 25TH AVENUE
BROADVIEW, ILLINOIS 60153
TEL: 708-865-5200
c
‘I
P
.a~ducts
country. Please contact your Blaupunkt dealer for further explanation of the repair or replacement
process.
sold outside the United States are subject to the limitations of that Blaupunkt region or
NOTICE TO NON-U.S.A. OWNERS:
UA/CSV
19
ACCESSORIES /
There are four accessories available for your Velocity amplifier which increase its flexibility and
guarantees high performance for years to come.
1
RM-1, REMOTE CONTROL: This control offers the consumer
the capability of remotely controlling the gain of a subwoofer
amplifier, or multiple amplifiers, from the front seat of the car.
The control also has the capability to change the threshold
(turn-on point) for the
amplifiers. This control uses simple telephone wire and RJ-11
jacks to interconnect and is insensitive to vehicle noises.
2.
BB-1, BASS BRIDGE: Mixed mode stereo/mono can be
created using simple passive components (coils and capacitors)
but can be confusing for the average installer. We highly
recommend that the BB-1 be used to avoid possible confusion
and ensure proper operation.
EC-l, END CAP: If only one amplifier is installed in a car,
3.
these end caps can be placed at either end of this amp to
protect the control settings and wires. If two or more amps
are used, an EC-l can be mounted between two amps to
“bridge” the gap between the two amps thus trimming out the
appearance nicely.
ACCESSOIRES / ACCESORIOS
HUSHTM
noise reduction inside the
RM-1 REMOTE GAIN CONTROL
I
CB-1, CAPACITOR BANK: The main benefit of any kind of
4.
capacitance at the power line into the amp is for power
stabilization. This problem may show up as the vehicle’s
headlights “dancing” with the music. It may also be heard as
“singing” noises from inside the amplifier due to heavy current
loads. The CB-1 simply connects to the power terminals of the
amp in parallel with those from the vehicle.
OTHER NOTES / AUTRES NOTES / OTRAS NOTAS
54
WEL OC/TYTM V7000
TECHNICAL SPECIFICATIONS
FEATURE/PARAMETER
Channels
Size (h x w x
d)
Weight
Crimping style speaker terminals
Maximum wire size
Blue power-on LED
Noise reducing differential input circuits
Inputs isolated from ground
Subsonic filter
Separate front/rear gains
Spade type automobile fuses
Speaker short, short to + 12V & ground protection
High, low, reverse voltage protection
Power output transistors
Switching
power supply transistors
impedance stability:
PERFORMANCE DATA
Power output @ 0.1% THD:
4 ch satellites into
Bridged satellite channel(s) into 4
2 ch subwoofer into
Bridged subwoofer into 4
4/2/l D
f2
4/2/l D
D
1 ch front center channel
Total Harmonic Distortion:
@
full rated output
@
1 watt/l
kHz
Signal/Noise ratio:
@
full rated power - satellite / subwoofer / center
@
1 watt/l
kHz -
satellite I subwoofer I center
Damping factor - satellite / subwoofer channels
Frequency response (in full range mode)
Satellite High-pass/Low-pass crossover frequency
Subwoofer Low-pass (only) crossover frequency
Input impedance
Input signal voltage control
Current draw/efficiency @ 14.4 V dc:
@
full rated power (7 ch into 4
@
33% power (high listening levels)
@
idle
12)
Battery voltage to maintain rated power
Usable battery voltage
Trigger line voltage
Trigger line current draw
Turn on delay time
Thermal power rollback temperature (non-muting)
Input common mode rejection
ower supply ripple rejection
note control gain range
P
JSH
noise reduction due to downward expansion
VALUE
7/6/5/4
(55 x
248 x
2.2 X
9.75
X 16.0”
406mm)
13.5 Ibs (6.2 kg)
YES
a ga.
YES
YES
YES
YES (10 Hz)
YES
YES
YES
YES
High current bipolar
MOSFET’s
1 D stable (4ch satellitel2ch subwoofer
mode only: 2 fI on front center channel)
4 D only in bridge mode (2 n or lower
not recommended due to high currents)
VALUE
4 x 40W /
1 x
1oow
8OW /
40W
2xaow/l2ow/aow
1 x 2oow
1 x 2ow
0.05%
0.07%
102/107/95dB
a5 I 88 I a2
dB
> 200
5-50,000
Hz
20-220 Hz
20-220 Hz
40 k ohms
0.3 - 6.0 V rms
50.0 A I 52 %
26.0 A
I32
%
1.5 A
12.6 V dc
10 - 18 V dc
7.5- 18Vdc
< 15mA
1.5 s
170 “F
faooc)
>
65
dB
> 70 dB above 1
0 to
-3OdB
> 20
dB
kHz
Note:
Due
consumer
to ongoing product improvement, specifications and design are subject to change without advanced notice to the
and/or
retailer.
55
BLAUPUNKT
Bosch Group
Robert Bosch Corporation
Sales Group - Blaupunkt Division
2800 South 25th Avenue, Broadview, Illinois 60153
Division Blaupunkt de Robert Bosch Inc.
6811 Century Avenue
Mississauga, Ontario
Canada
Robert Bosch, SA., DE, C. V.
Dr.
Lucia
Cols.
Copyright 1994 by the Robert Bosch Corporation
No portion of this work may be reproduced in any form without the
written consent of the Robert Bosch Corporation
The
VELOCXY”
Rochester Hills, Michigan, U.S.A.
L5N
1Rl
270
Doctores,
and
Mexico 06720
HUSHTM
names are trademarked by Rocktron Corporation of
Printed in the
U.S.A
(11194)
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