HV sedici imp. Inglese
R
L
L
HI
PASS
C
HI
PASS
SUBWOOFER
C
60
80
100
120
150
200
Hertz
FREQUENCY
8
10.6
7.9
6.4
5.3
4.3
3.2
L mH
660
495
400
330
265
200
C µF
4 Ohms
21.0
15.9
12.7
10.6
8.5
6.4
330
245
200
165
132
100
8 Ohms
L mH
C µF
LOUDSPEAKERS IMPEDANCE
TRI-MODE CONNECTION (fig. 1)
PRINTED IN ITALY - Code 10124600-A
Car power amplifier
Strada Regina Km 3,5 • I 62018 Potenza Picena (MC) • Tel.0733/870.870 • Fax 0733/870.880 • http://www.audison.com
OWNER'S MANUAL
2
Balanced or unbalanced audio signal (it can be selected) applied to the input can directly
drive the final stage without the preamplifier interposition.
By disactivating, the preamplifier, the final stage sensitivity can be between 1.0 ÷5 V.
The signal coming from the MA-1X module arrives in balanced connection to the
V-AMP 12 LV module which makes the driving of the final stages in voltage and the
thermic stability control.
The internal circuit is characterized by a double complementary differential amplifier in
CASCODE connection with FET-BJT and current mirror combination. This circuit is
integrated in two custom chips (CDAP - CDAN) whose components undergo a laser trim
for the maximum tolerances reduction.
FINAL POWER STAGE
HV sedici amplifier is supplied with an independent preamplifier unit, where the general
sensitivity can be adjusted in the 0.2÷1V range.
This unit can be disactivated, allowing the connection with an external preamplifier.
The input signal is applied to ABS (Audison Balanced System) connector in balanced or
unbalanced way, and to MA-1X module through two polypropylene capacitors.
MA - 1X circuit, which constitutes the input interface for audio signals, is characterized
by a FET- BJT hybrid circuitry in CASCODE configuration and it has been superintegrated
in a single chip whose features are: max power supply: ±50 VDC, S/N ratio: 125 dBA,
Slew Rate: 120 V/µS, Bandwidth: DC÷1MHz.
PREAMPLIFIER
All controls are located on top of the device.
The HV sedici amplifier is the first born in a new family of high performance car
amplifiers and other devices called THESIS.
It is endowed with highly innovative technologies and circuit solutions and its realization
required big efforts and investments for research and development.
The purpose was to realize an amplifier that had to be a "milestone" in the evolutive history
of AUDISON products.
Its structure in the circuit layout can be identified at two levels: the first one (power) is
entirely on the mother circuit board and it collects all components which handle high
currents and need warmth dissipation; the second one (signal and control) is located on
special surface mounting devices which perform all complex functions of the whole
device.
This peculiar design technique allowed the study and optimization of the signal paths and
the blocking of the interactions among the different stages.
The HV sedici amplifier is constituted by three main parts: preamplifier, final power stage
and power supply.
7
The device is provided with several electronic protections which protect the amplifier
from dangerous or wrong functioning conditions , avoiding to interfere with the music
signal in order to get the best performances in every condition.
- Outputs protection: any type of short circuit on the speaker wires , be it between
themselves or to ground , will cause no damages.
- Temperature protection: anomalous use conditions or high ambience temperature
(above 60°C), that doesn’t allow the amplifier to discharge the produced heating
(maximum working temperature of the device 80°C), causes the protection intervention.
- Protection against inverted polarity of the power supply: if the power supply cables
polarities should be mistakenly inverted, the electronic circuitry will be protected by
burning the external fuse, that will have to be replaced with an identical one.
- Protection against continuous current in the output.
- Protection against excessively low or dangerous loads.
A front red LED (SAFE) indicates intervention of protection circuits. Once the cause of
malfunctioning is eliminated, you need to turn head unit off and turn it back on in order
to have the device function again. The amplifier will function normally.
PROTECTIONS
Adjust the device according to the head unit requirements, through the above mentioned
controls and regulations.
1) Set the two L-R LEVELS potentiometers towards minimum (counterclockwise).
2) Turn the head unit volume control to about 3/4 of its maximum volume.
3) Set the two L-R LEVELS towards maximum sensitivity until you get sporadic lighting
of PEAK R-PEAK L leds with high dynamic musical passages.
IMPORTANT: if you should hear distortion phenomena without the PEAK L-R leds
lighting up, it means that a distorted signal is coming from the head unit. In this case, turn
the head unit volume down until there’s no longer any distortion. Repeat calibration
operation omitting step 2.
PROCEED AS FOLLOWS
- MONO ON-OFF: see MONO connection.
- BALANCED-UNBALANCED: see balanced-unbalanced connection.
- PREAMP ON-OFF: see connection to external preamplifier.
- L-R LEVELS: amplifier sensitivity adjustment , separated for the two channels.
REGULATIONS
INTRODUCTION
6
THREADED CONNECTORS (Mute in-out). MUTE IN input silences the amplifier.
The device goes into muting when it receives a positive voltage between 3 VDC and 15
VDC, or when ground (GND) is applied.
MUTE IN can be connected to the proper head unit output (if provided) or to the MUTE
output of a cellular phone; in this case , when there is a phone call, the car system is
silenced. When the conversation is over, the amplifier will automatically play again.
The amplifier MUTE OUT contact must be connected to a second amplifier (if available)
provided with a special MUTE IN output. In this way, the second amplifier becomes
dependent on the first one as far as the car system MUTE functions are concerned.
MUTING CONTROL CONNECTION
THREADED CONNECTORS (Remote in-out). Connect the amplifier REMOTE IN
input to the proper head unit output (REMOTE AUX), or to electric antenna control.
REMOTE OUT output is used to turn on another possible device. A green LED ON
indicates when the amplifier is turned on.
TURN ON CONTROL CONNECTION
THREADED CONNECTORS (Power) ± . The battery positive is connected to the +
POWER terminal inserting a fuse (provided) next to the battery itself.
- POWER terminal must be connected to the battery negative (ground) through the car
chassis, taking care to guarantee an excellent electrical contact on a metallic point not
covered with paint or insulating materials of any kind.
For the electrical connections described, use adequate cables, with a minimum diameter
of 6 mm (3 A.W.G.). An allen key is provided for the terminal screws.
POWER SUPPLY CONNECTION
Position MONO push-button to ON. Use IN R input. Take the power output from the +L
(LEFT) and -R (RIGHT) terminal.
It’s possible to obtain MONO use just for SUBWOOFER frequencies and to have a
STEREO system for high frequencies using the TRIMODE configuration (pict.1); in this
case leave MONO push-button to OFF position and apply the connection system
according to the picture. Refer to chart for inductance and capacity values relative to the
desired crossover frequency.
MONO CONNECTION
THREADED CONNECTORS (Speaker L-R). Connect the speakers or the speakers
passive crossover according to polarities.
IMPORTANT: Never connect -R and -L outputs to ground or to each other.
If a crossover filter is used, be sure the two channels don’t have a common ground. An
allen key is provided for the terminals screws.
OUTPUTS CONNECTION
3
The switching power supply is composed by a PWM controlled push-pull double power
supply. One of them generates and controls only positive voltages, the other one the
negative voltages. The power supply system functioning logic is directed by a single
circuit, called PWM CONTROLLER, which also attends to the PWM generation in the
positive power supply and operates in a synchronic way with a second circuit called PWM
SERVEUR, which has the task of making the PWM control of the negative power supply.
Synchronism between the two PWM generator clocks avoids the formation of residual
products at low frequency which could be converted into audio disturbance noises by the
amplifier.The particular dynamic control of the audio amplifier voltages allows the
voltage linear levelling and is able to supply energy instantaneously.
This control is active up to the frequency of about 800 Hz; the levelling at upper load
frequencies is given to the transformer capacities which are equal to 15000 uF. The
measurable result of such a complex controlling system is to have a "ripple" on the
transformer voltage equal to 300 mV when the HV sedici is loaded at the maximum power
on resistive load.
As it regards the sound, the fact that we have a perfectly stabilised power supply voltage
for the final stage allows the correct reproduction of high dynamic content transient
signals, it guarantees details, acoustic precision and very good reconstruction of sound
image.
The power supply delivers three secondary voltages: the first one is for the final power
stage at ±40 V, the second one for the internal preamplifier at ±25 V and the third one
at ±47 V for the final stage driver circuit.
The power supplies are provided with a primary protection which interdicts their
functioning in case of non operative overloading, avoiding circuit damages.
All interactions between power supply and amplifier (secondary voltages control, muting
circuits control and reception of information about the final stage protection) are effected
through optocoupler circuits.
This solution avoids the transfer of the noises coming from the car electric device to the
car radio section.
POWER SUPPLY
Then there is a complementary voltage amplifier stage in CASCODE configuration and
realised with BJT transistors.
These circuits have been duly polarised and configured as transconduttance modulators
(HCP - HCN Hyperlinear correction) with filter functions for transient distortions.
The electrical features of the V-AMP 12LV section are: THD distortion at 100 Vpp:
0.04%; Sleaw Rate: 250/µS; Baudwidth: DC÷1.5 MHz; S/N: ratio 122 dBA.
Monotonic decreasing distortion spectrum with stop at the harmonic sixth.
The final stage driven by the above mentioned module is a complementary symmetric
inverted triplet configuration and it is supplied with a driver and predriver at low Cob and
four + four transistors amplifiers of 150 W, 15 A with Ft of 30 MHz.
The total reaction rate used in this amplifier is of 4 dB and the global performances
obtained by the whole amplifier stage are: bandwidth 1.5 Hz÷180 KHz; THD distortion:
min. 0.1 % at 160 W; Slew Rate: 90 V/µS.
4
5
Position the PREAMP push-button to OFF position (internal preamplifier exclusion). In
this case the amplifier sensitivity decreases and it is necessary to connect the device inputs
to an external preamplifier.
The sensitivity can be adjusted from a maximum of 1.0 VRMS to a minimum of 5.0 VRMS
in unbalanced configuration (±0.5 VRMS to ±2.5 VRMS balanced).
With the PREAMP push-button to ON position (internal preamplifier on), the sensitivity
changes from a maximum of 0.2 VRMS to a minimum of 1.0 VRMS in unbalanced
configuration (±0.1 VRMS to ±0.5 VRMS balanced).
The chart on the controls area shows the different sensitivities according to the operative
modalities of the amplifier.
1) In order for this device to function properly it’s important that it is installed in a spot
where the temperature is beetween 0°C (32°F) and 55°C (131°F)
2) It must be installed in a dry and well ventilated spot.
3) Power supply voltage is 12 VCC, negative to ground. Make sure that the characteristics
of the vehicle electrical system are suitable.
4) For safe driving, it’s advised to listen to music at a volume level that won’t drown out
external traffic noise.
Balanced: Position BALANCED-UNBALANCED push-button to BALANCED. For
the amplifier inputs use the ABS connectors in Audison cable catalogue taking the
preamplified signal from a device provided with balanced outputs.
Unbalanced: Position BALANCED-UNBALANCED push-button to UNBALANCED.
In the UNBALANCED position device can be used in the unbalanced way (traditional
way) and it’s therefore possible to employ common Pin RCA signal connectors. For
sensitivity values , refer to the technical features chart on the controls area of the device.
BALANCED-UNBALANCED CONNECTION
Pin ABS CONNECTORS (Inputs). Observing polarity, connect L-R inputs to respective
preamplified outputs of radio-cassette player, preamplifier or electronic crossover. In order
to make UNBALANCED signal connections (traditional connection), it’s possible to use
pin RCA connectors used in almost all electronics on the market. In order to make
BALANCED signal connections ( taking the signal from a balancer-preamplifier outputs)
it’s necessary to use ABS signal connectors which you can find in audison cable catalogue.
In case of unbalanced connection and in case the radio-cassette player doesn't share the
signal GND (preamplified outputs) with the battery GND (chassis of the device itself), the
shield of the shielded cable must be connected to the radio-cassette player chassis.
INPUTS CONNECTIONS
The HV sedici amplifier is characterized by its relatively compact size considering the
performances it offers.
This makes installation possible even in the most unlikely places. For mounting use 6 selfthreading screws provided.
IMPORTANT: The wooden moulding which protects controls on top of the device must
be removed before installing. This is done by loosening the three screws through the 5mm
allen key provided. Once the installation and calibration have been made, mount the
wooden protective moulding. For excellent results it’s advised to use audison cable
products to complete your installation. They include: power cables, signal cables, speaker
wires, signal connectors and all accessories needed to complete the wiring.
CONNECTION TO EXTERNAL PREAMPLIFIER
150 + 150 W (RMS)
160 + 160 W (RMS)
320 + 320 W (RMS)
500 + 500 W (RMS)
640 W (RMS)
1000 W (RMS)
0.1 %
0.08 %
1.5 Hz - 180 KHz
100
2.2 µS
60 V/ µS
102 dBA
4 dB
3 ÷ 15 VDC
12 VDC - 150 mA
GND / 3÷15 VDC
12 VDC
0.2÷1.0 VRMS
(± 0.2 ÷ ± 0.5 VRMS)
1.0÷5.0 VRMS
(± 0.5 ÷ ± 2.5 VRMS)
10 KOhms
8 - 4 - 2 - 1 Ohms
8 - 4 - 2 Ohms
256 x 60 x 406
10.08 x 2.35 x 15.98
11÷15 VDC
2.6 A
60 A
INSTALLATION
PRECAUTIONS
POWER SUPPLY
IDLING CURRENT
MAX CONSUMPTION (2 ch 4 Ohms)
CONT. NOMINAL POWER (Tol. + 10%; -5%)
2 ch x 4 Ohms; 0.3 % THD; 12 VDC
CONTINUOUS OUT POWER (2 ch 4 Ohms; 13.8 VDC)
CONTINUOUS OUT POWER (2 ch 2 Ohms; 13.8 VDC)
CONTINUOUS OUT POWER (2 ch 1 Ohm; 13.8 VDC)
CONT. OUT POWER (1 ch 4 Ohms; 13.8 VDC) Bridge
CONT. OUT POWER (1 ch 2 Ohms; 13.8 VDC) Bridge
DISTORTION - THD
DISTORTION - IMD
BANDWIDTH
DAMPING FACTOR (4 Ohms)
RISE TIME
SLEW RATE
S/N RATIO
TOTAL NEGATIVE FEEDBACK
REMOTE IN
REMOTE OUT
MUTE IN
MUTE OUT
PRE INPUT SENSITIVITY (unbalanced)
PRE INPUT SENSITIVITY(balanced)
AMP INPUT SENSITIVITY(unbalanced)
AMP INPUT SENSITIVITY(balanced)
INPUT IMPEDANCE
LOAD IMPEDANCE (stereo)
LOAD IMPEDANCE (bridge)
SIZE BxHxL mm
SIZE BxHxL inch
TECHNICAL FEATURES
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement