Blaupunkt High Power Amplifier Instruction Manual
Model Numbers: AMP-1901DPRO, AMP-1904DPRO
System Planning
Proper system planning is essential for maximizing your amplifier's performance and reliability. Consult an authorized Blaupunkt dealer for expert assistance with system design and installation.
System Requirements
Each channel of your amplifier can handle 4Ω speaker loads in Stereo Mode. When a channel-pair is bridged:
- Recommended minimum load impedance is 3Ω for subwoofer use.
- Recommended minimum load impedance is 4Ω for full-range operation.
Operating with lower impedances may cause the unit to overheat, triggering the thermal protection circuitry, which will shut down the amplifier. Normal operation will resume once the chassis cools. Continuous operation under such conditions is not recommended and may reduce the amplifier's lifespan.
Most car audio speakers have a 4Ω impedance. Connecting two such speakers in parallel results in a 2Ω nominal impedance, which is not recommended for use with bridged channels.
Speaker Wiring Configurations:
Series Wiring
Diagram Description: Two 8Ω speakers wired in series to a single channel output, resulting in a 16Ω load.
Parallel Wiring
Diagram Description: Two 4Ω speakers wired in parallel to a single channel output, resulting in a 2Ω load.
Series/Parallel Wiring
Diagram Description: Four 4Ω speakers wired in a series/parallel configuration to two bridged channels, resulting in a 4Ω load per bridged channel.
System 1: Connection Subwoofer
Diagram Description: Shows the connection of a subwoofer using the speaker output terminals (4-8Ω) and the power input terminals (+12V DC, REM, GND). Includes connections for a wired remote control.
System 2: Bridge Connection Subwoofer
Diagram Description: Illustrates connecting a subwoofer to bridged speaker outputs (4-8Ω) and the power input terminals (+12V DC, REM, GND).
Specifications
AMP-1904DPRO
| RMS output power 2Ω (Watts) | 170W x 4 CH |
| RMS output power 4Ω (Watts) | 120W x 4 CH |
| THD | <=0.05% |
| Frequency response (-3dB) | 10Hz-30KHz |
| Signal to noise ratio | >=96dB |
| Sensitivity | 250mV-6V |
| Recommended fuse type | 30A x 1 |
| Dimensions | 6.69 x 3.78 x 1.69 in |
AMP-1901DPRO
| RMS output power 1Ω (Watts) | 1800W x 1 CH |
| RMS output power 2Ω (Watts) | 1300W x 1 CH |
| RMS output power 4Ω (Watts) | 600W x 1 CH |
| THD | <=0.05% |
| Frequency response (±2dB) | 30Hz-250Hz |
| Signal to noise ratio | >=96dB |
| Sensitivity | 250mV-6V |
| Recommended fuse type | 30A x 2 |
| Dimensions | 6.69 x 3.78 x 1.69 in |
Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| No Output | Low or no remote turn-on input | Check remote turn-on voltage output on amplifier and correct as needed. |
| No Output | Fuse down | Check power wire integrity and reverse polarity; repair as needed and replace fuse. |
| No Output | Power wires not connected | Check power wire connections and repair/replace as needed. |
| No Output | Audio input not connected or no output from source | Check input connections and signal integrity; repair/replace as needed. |
| No Output | Speaker wires not connected | Check speaker wires and repair/replace as needed. |
| Audio cycles on and off | Speakers are blown | Check system with known working speaker and repair/replace speakers as needed. |
| Audio cycles on and off | Thermal protection engages when amplifier heat sink temperature exceeds 90°C | Make sure there is proper ventilation for the amplifier and improve ventilation as needed. |
| Distorted output | Loose or poor audio input | Check input connections and repair/replace as needed. |
| Distorted output | Amplifier level sensitivity set too high, exceeding maximum output capability of amplifier | Reset gain. Refer to the gain section of the manual for detailed instructions. |
| Distorted output | Impedance load to amplifier too low | Check speaker impedance load. If below 2Ω stereo or 4Ω mono, rewire speakers to achieve a higher impedance. |
| Shorted speaker wires | Shorted speaker wires | Check speaker wire connections and repair/replace as needed. |
| Speaker incorrectly connected to amplifier properly | Speaker incorrectly connected to amplifier properly | Check speaker wiring and repair/replace as needed. Refer to the installation section of this manual for detailed instructions. |
| Poor Bass Response | Speaker polarity may be reversed or wired incorrectly, causing cancellation at low frequencies. | Check speaker polarity and repair as needed. |
| Poor Bass Response | Crossover set incorrectly | Reset crossover. Refer to the multi-cross crossover configuration section of this manual for detailed instructions. |
| Battery Fuse Blowing | Impedance load to amplifier is too low | Check speaker impedance load. If below 2Ω stereo or 4Ω mono, rewire speakers to achieve a higher impedance. |
| Amplifier Fuse Blowing | Short in power wire or incorrect power connection or wire | Check power and ground connections and repair as needed. |
| Amplifier Fuse Blowing | Fuse used is smaller than recommended | Replace with proper fuse size. |
| Amplifier Fuse Blowing | Too much current being drawn | Check speaker impedance load. If below 2Ω stereo or 4Ω mono, rewire speakers to achieve a higher impedance and replace with recommended fuse size. |
| Amplifier Fuse Blowing | Fuse used is smaller than recommended | Check speaker impedance load. If below 2Ω stereo or 4Ω mono, rewire speakers to achieve a higher impedance and replace with recommended fuse size. |
| Amplifier Fuse Blowing | Too much current being drawn | Check power and ground connections. Repair as needed. Replace with proper fuse size. |
