Blaupunkt BPA-HX320 4-Channel Class AB Amplifier
User Manual
Important Safety Information
WARNING: PLEASE READ CAREFULLY BEFORE INSTALLING OR OPERATING THIS UNIT.
Ensure the unit is mounted in a suitable location that is completely dry, has good air circulation, and is mechanically stable.
Specifications
| Amplifier Section | Value |
|---|---|
| Power Output 4Ω (watts) | 80W x 4CH |
| Power Output 2Ω (watts) | 120W x 4CH |
| Power Output BTL (watts) | 240W x 2CH |
| THD | ≤0.1% |
| Frequency Response (±2dB) | 20Hz~20KHz |
| Signal to Noise Ratio | ≥90dB |
| Sensitivity | 0.2~6V |
| Recommended Fuse Type | 30A x 2 |
| Dimensions | 375mm x 207mm x 50mm |
System Planning
Proper system planning is essential for maximizing your amplifier's performance and ensuring system reliability. Consult your authorized Blaupunkt dealer for assistance with system design and installation, as they are trained to optimize your system's sonic potential.
Speaker Requirements
Each channel of the BPA-HX320 amplifier can drive 4-ohm speaker loads in stereo mode. When a pair of channels is bridged, the recommended minimum load impedance is 3 ohms for subwoofers and 4 ohms for full-range operation. Operating with lower impedances may cause the unit to overheat and engage thermal protection. While the unit will resume normal operation after cooling, continuous operation under such conditions is not recommended and can reduce the amplifier's lifespan.
Most car audio speakers have a 4-ohm impedance. Connecting two 4-ohm speakers in parallel results in a 2-ohm load for the amplifier. Some subwoofers feature dual 4-ohm voice coils; connecting these in parallel also results in a 2-ohm impedance, which is not recommended for bridged channels.
Speaker Wiring Configurations:
- Series Wiring: Connects speakers in series, increasing the total impedance. (e.g., two 4Ω speakers in series = 8Ω).
- Parallel Wiring: Connects speakers in parallel, decreasing the total impedance. (e.g., two 4Ω speakers in parallel = 2Ω).
- Series/Parallel Wiring: Combines series and parallel connections to achieve specific impedance loads.
[Diagrams illustrating these wiring configurations are present in the original document, showing how speakers with 4Ω or 8Ω impedance can be connected in series, parallel, or series/parallel to achieve different total impedance loads for the amplifier.]
Power Connection Leads
Proper power connection is critical for amplifier operation. The diagram shows the main power connections: +12V (from battery via fuse), GND (to car chassis), and REM (remote turn-on signal from the head unit).
Notes on the Power Supply:
- Connect the +12V power input lead only after all other leads are connected.
- Ensure the ground wire is securely connected to a metal part of the car to prevent malfunctions.
- The REMOTE terminal turns the unit on when +12V is applied. A thinner wire (18 GAUGE) is acceptable for this connection. If the car radio has a power antenna control wire, it can be used to drive the REMOTE terminal.
- Use a power supply lead with a fuse rated the same as the original fuse, placed as close to the car battery as possible.
- For full power operation, use leads of at least 10-Gauge (AWG) for the +12V and GND terminals to handle the maximum current.
[A diagram illustrating the power connection leads (+12V, GND, REM) to the amplifier and battery is present in the original document.]
Troubleshooting
Refer to the following table for common issues and their solutions:
| Symptom | Possible Cause | Action to Take |
|---|---|---|
| No Output | Low or no remote turn-on input | Check remote turn-on voltage output at amplifier and correct as needed. |
| No Output | Fuse blown | Check power wire integrity and reversed polarity, repair as needed and replace fuse. |
| No Output | Power wires not connected | Check power wire and ground connections and repair or replace as needed. |
| No Output | Audio input not connected or no output from source | Check input connections and signal integrity, repair or replace as needed. |
| No Output | Speaker wires not connected | Check speaker wires and repair or replace as needed. |
| Audio cycles on and off | Speakers are blown | Check system with known working speaker and repair or replace speakers as needed. |
| Audio cycles on and off | Thermal protection engages when amplifier heatsink temperature exceeds 90°C | Ensure proper ventilation for the amplifier and improve ventilation as needed. |
| Distorted Output | Loose or poor audio input | Check input connections and repair or replace as needed. |
| Distorted Output | Amplifier level sensitivity set too high; exceeding maximum output capability of amplifier | Reset gain referring to the tuning 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. |
| Distorted Output | Shorted speaker wires | Check speaker wire connections and repair or replace as needed. |
| Distorted Output | Speaker not connected to amplifier properly | Check speaker wiring and repair or replace as needed. Refer to the installation section of this manual for detailed instructions. |
| Poor Bass Response | Internal crossover not set properly for speaker | Reset crossovers referring to the multi-cross crossover configuration section of this manual. |
| Poor Bass Response | Speakers are blown | Check system with known working speakers and repair or replace as needed. |
| Poor Bass Response | Speakers wired with wrong polarity causing cancellation at low frequencies | Check speaker polarity and repair as needed. |
| Poor Bass Response | Crossover set incorrectly | Reset crossovers referring to the multi-cross crossover configuration section of this manual for detailed instructions. |
| Battery fuse blowing | Impedance load to amplifier too low | Check speaker impedance load; if below 2Ω stereo or 4Ω mono, rewire speakers to achieve a higher impedance. |
| Battery fuse blowing | Short in power wire or incorrect power connections | Check power and ground connections and repair as needed. |
| Battery fuse blowing | Fuse used is smaller than recommended | Replace with proper fuse size. |
| Battery 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. |
| Amplifier fuse blowing | Short in power wire or incorrect power connections | Check power and ground connections and repair as needed. |
| 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 | Replace with proper fuse size. |
Wiring Diagrams Description
The document includes diagrams illustrating various wiring configurations for the Blaupunkt BPA-HX320 amplifier:
- System 1: 4 Channel Mode: Shows the amplifier's four channels (FRONT L/R, REAR L/R) connected to individual speakers, typically rated for 2-8 Ohms impedance.
- System 2: 3 Channel Mode: Demonstrates how to bridge two channels for a subwoofer while using the remaining channels for other speakers. This configuration typically involves connecting one speaker to a bridged pair and others to individual channels.
- System 3: 2 Channel Bridged Connection: Illustrates bridging two channels to power a single, higher-demand speaker, often a subwoofer, with a recommended impedance of 4-8 Ohms.
These diagrams visually represent how to connect speakers to achieve specific impedance loads and utilize the amplifier's full potential across different channel configurations.
Multilingual Content Note
This document contains information in English, Spanish (ES), Portuguese (PT), and French (FR). The primary content and descriptions are provided in English.
