GTA 275 - Car amplifier BLAUPUNKT - Free user manual and instructions
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| Product type | Car amplifier |
| Brand | Blaupunkt |
| Model | GTA 275 |
| Max power (stereo 4 Ω) | 2 x 160 W |
| Max power (stereo 2 Ω) | 2 x 210 W |
| Max power (mono 4 Ω) | 1 x 425 W |
| RMS power (stereo 4 Ω) | 2 x 75 W |
| RMS power (stereo 2 Ω) | 2 x 105 W |
| RMS power (mono 4 Ω) | 1 x 210 W |
| Bandwidth | 10 Hz - 35,000 Hz |
| Signal-to-noise ratio | >95 dB |
| Harmonic distortion (RMS) | <0.03% |
| Impedance stability | 2 Ω (4 Ω in bridged mode) |
| Audio inputs | 2 x Cinch/RCA gold-plated, 2 x High-Level, 1 x Direct Aux 3.5 mm stereo |
| Speaker outputs | 2 x gold-plated terminals |
| Input sensitivity (RCA) | 0.3 V - 8 V |
| Direct Aux sensitivity | 0.3 V |
| Low-pass filter (Low Pass) | 50-250 Hz |
| High-pass filter (High Pass) | 50-250 Hz |
| Bass boost | 0 to +12 dB |
| Supply voltage | 12 V (vehicle battery) |
| Recommended cable gauge | ≥ 6 mm² |
| Dimensions (L x H x D) | 262.5 x 53 x 268.5 mm |
| Weight | Approx. 2 kg (estimated) |
| Built-in protection | Fuses (do not bypass) |
| LED indicators | Green: normal operation; Red: protection activated |
| Car stereo compatibility | Cinch or High-Level output (with ISO-Cinch adapter if necessary) |
| Operating mode | Stereo or bridged mono |
| Gain control | Adjusts input sensitivity (0.3 V - 8 V) |
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USER MANUAL GTA 275 BLAUPUNKT
Congratulations on your purchase of a high-quality GTA power amplifier. By selecting the GTA 275 you have chosen a product which delivers superlative reproduction quality. Whether you are upgrading an existing system or using the GTA power amplifier in a new system, you are certain to notice immediate performance benefits!
The Blaupunkt editors are constantly working on making the operating instructions clearer and easier to understand. However, if you still have any questions on how to operate the equipment, please contact your dealer or the telephone hotline for your country. You will find the hotline telephone numbers printed at the back of this booklet.
We provide a manufacturer guarantee for our products bought within the European Union. You can view the guarantee conditions at www.blaupunkt.de or ask for them directly at:
Blaupunkt GmbH
Hotline
Robert-Bosch-Str. 200
D-31139 Hildesheim
Germany
Recommendation:
A power amplifier's performance is only as good as its installation. Proper installation will maximise the overall performance of your audio system. We recommend that you have our product installed professionally. Should you decide to install the amplifier yourself, however, please read through these instructions carefully, and take your time over the installation.
Finally, a word about your health: please bear in mind when playing music in your car that sustained sound levels above 100 dB can damage your hearing and may even result in total hearing loss. Modern high-performance systems and high-quality loudspeaker configurations are quite capable of generating noise levels above 130 dB
Safetyprecautions
Instructions for installation and connection
Fit a fuse in the amplifier power line no more than 30~cm from the vehicle battery, in order to protect the battery in the event of a short-circuit between it and the power amplifier. The amplifier's own fuse protects the amplifier itself, but not the car battery.
Disconnect the negative terminal of the battery before carrying out installation and connection work.
Observe the vehicle manufacturer's safety instructions (regarding airbags, alarm systems, trip computers, vehicle immobilisers).
The final stage must be installed professionally for reasons of safety. The mounting surface must be suitable for the screws provided, and must provide firm support. For safety reasons the GTA 275 should be fixed in a reliable way. You must not install the GTA 275 on the rear shelf, on the rear seats or on any other surface open to the front.
When drilling holes, take care to avoid damage to vehicle components (battery, cables, fuse boxes).
Fit the amplifier in a suitable location, e.g. beneath the seats or in the trunk (Fig. 1). The mounting location must also be dry, and provide sufficient ventilation for cooling of the amplifier. Use cable grommets when passing cables through holes with sharp edges. Use loudspeakers with an impedance of 2 to 4 (see table or installation drawing). Observe the max. power handling specifications (music output). Do not connect the loudspeakers to ground; only use the terminals provided. The cross-section of the positive and negative cable must be at least 6mm^2 .
GTA 275 amplifier
The amplifier is suitable for connection to car radios with Cinch connector. Use the Blaupunkt ISO Cinch adapter to connect the amplifier to car radios with ISO connector (7 607 893 093/7 607 855 094).
Applications and loudspeaker connection
| Stereo mode | |
| Max. power | 2 x 160 watts / 4 Ω ......Fig. 4 |
| Mono mode | |
| Max. power | 1 x 425 watts / 4 Ω ......Fig. 5 |
| Stereo mode | |
| Max. power | 2 x 210 watts / 2 Ω ......Fig. 4 |
| Stereo mode | |
| RMS power | 2 x 75 watts / 4 Ω ......Fig. 4 |
| Mono mode | |
| RMS power | 1 x 210 watts / 4 Ω ......Fig. 5 |
| Stereo mode | |
| RMS power | 2 x 105 watts / 2 Ω ......Fig. 4 |
| RMS power in accordance with DIN 45500 (1% dist. / +14.4V) | |
| Frequency response | 10 Hz - 35,000 Hz |
| Signal-to-noise ratio | >95 dB |
| Distortion factor | (RMS)< 0.03 % |
| Stability | 2 Ω (4 Ω in bridged mode) |
| Input sensitivity | 0.3 - 8 V |
| Input sensitivity | |
| Direct Aux IN | 0.3 V |
| Low pass filter | |
| (Low Pass) | 50 - 250 Hz |
| High pass filter | |
| (High Pass) | 50 - 250 Hz |
| Bass boost | 0 to +12 dB |
| Inputs | 2x RCA, gold-plated 2x HighLevel speakers 1x Direct Aux Inputs, 3.5 mm stereo |
| Outputs | 2x Loudspeakers, gold-plated |
| Dimensions | |
| W x H x D (mm) | 262.5 x 53 x 268.5 |
Positive/negative connection
We recommend a cable cross-section of not less than 6mm^2 . Run a standard commercial positive cable to the battery and connect to the fuse holder. Use cable grommets when passing cables through holes with sharp edges. Bolt a standard commercial negative cable to a ground point free of induced noise (car body bolt, body panel) - not to the negative battery pole. Clean the contact surface of the ground point down
to bare metal and coat with antiseize graphite petroleum.
Integral fuses
The integral fuses within the amplifier protect the final stage and the entire electrical system in the event of a fault. Never bridge fuses or replace fuses with a higher current rating.
Example connections
Power supply connection .fig.2.
Connection of car radio with cinch
output.. fig.3.
Loudspeaker connections .fig.4/5
High- Input .fig.6
Direct Aux Input Connection .fig.7
& 一 + 12V & 一 + 12V Connect remote amplifier connection to switchable +12V power source.
This enables the amplifier to be switched on and off with the radio's On/Off switch.
High-level inputs
The amplifier is equipped with high-level inputs to permit connection to radios without preamp outputs (Fig. 6). This enables direct connection to be made to the radio's loudspeaker output.
Direct Aux Input Connection
Connection options if the car radio has no AUX input or if the AUX input is already connected
You can directly connect various AF sources (such as an MP3 player or mobile navigation system) via a 3.5mm jack plug optionally to the Direct Aux Input. All signal sources will then be heard simultaneously and their volume must be adjusted on the respective source device.
Note:
All AF sources must be set to Off during installation and connection!
Installing the jack-plug cable
Please use our 5 m jack-plug cable (Order No. 7607001525) to make the connection.
A special feature is that it has its own On/Off switch.
Switch position is OFF:
During installation and de-installation and when no AF source is connected.
Switch position is ON:
Only after an AF source has been connected.
Caution:
When making the connection, always set the volume control to minimum and switch off the amplifier.
Level control
The Level control enables the input sensitivity of the final stage to be matched to the output voltage of your car radio preamp output.
The range of adjustment extends from 0.3V to 8 V.
Adjust the input sensitivity in accordance with the manufacturer's specifications when connecting the amplifier to other radios.
Important:
Turning the Level control clockwise increases the input sensitivity of the amplifier, and thereby also the volume. The Level control is however not a volume control; an increase in volume is not achieved in the maximum position, even if this subjectively appears to be the case. The system merely increases the volume more quickly when the volume is turned up on the radio.
Loudspeaker connections
(If the amplifier is to be connected in a bridged mode, proceed with the section "Bridged loudspeaker connections".)
As with any audio component, connection of the amplifier and speakers with the correct polarity is essential for good bass reproduction. Ensure therefore when connecting that the positive (+) amplifier terminal is connected to the positive (+) loudspeaker terminal. The same applies to the negative (-) terminals. The left-hand amplifier channel must also be connected to the left-hand loudspeaker and the right-hand amplifier channel to the right-hand loudspeaker.
Bridged loudspeaker connections
The GTA can also be bridged in a mono configuration. This enables you to use the amplifier for one or more subwoofer(s) or a mid-range speaker. In this configuration the amplifier sums the right-hand and left-hand channels, delivering a single channel (mono) output.
Note:
The amplifier can sum the right- and left-hand signal information only if both the right- and left-hand RCA connections have been made.
CAUTION:
The amplifier must be presented with a load of 4 Ohms or higher in bridged mode. A lower load will cause the amplifier to overheat or switch off. This can lead to permanent damage of the unit.
Adjustment of the type and range of the cross-over frequencies
The type of crossover (i.e. "low-pass" or "hippass") and the desired crossover frequency can be selected on the GTA 275. If, for example, you wish to drive a pair of subwoofoers, connect in accordance with the low-pass diagram (fig. 3a). The crossover frequency is dependent upon the loud-speaker frequency range (consult the loudspeaker manufacturer's data for the recommended frequency range).
"Low-pass" frequency control
This control is active when the switch is set to "Low-pass" and permits selection of the desired crossover frequency. Example: at a setting of 150Hz , the loudspeaker has a frequency range of 10Hz to 150Hz .
"High- Pass"
At a of 250Hz , the loudspeaker has a frequency range of 250Hz to 35.000Hz .
Bass boost
You can adjust the bass output of the amplifier using the bass boost control. The settings range covers 0 dB to +12 dB.
Operating indicator
(POWER / PROTECTION)
Green lamp: Power amp on, regular operating condition
Red lamp: Power amp has been switched off electronically, due to a fault or failure.
This information is subject to change without notice!
FRANÇAIS
Introduction
High-input tilstnutting
Recycling and disposal
Our products are made from materials that can be disposed of in an environmentally sensitive manner and are suitable for appropriate recycling. Products that are to be scrapped must be collected separately from household waste. To dispose of the product, please use the available waste return and collection systems.
FRANÇAIS
Only for car radios with bridged output stage