Thunder TH800.4 - Receiver MTX Audio - Free user manual and instructions
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| Product Type | 4-Channel Car Audio Amplifier |
| Number of Channels | 4 |
| RMS Power Output (4 ohms) | 100W x 4 |
| RMS Power Output (2 ohms) | 150W x 4 |
| Bridged RMS Power (4 ohms) | 300W x 2 |
| Maximum Power Output | 800W |
| Frequency Response | 20Hz - 20kHz |
| Crossover Modes | Low-pass, High-pass, Full-range |
| Crossover Slope | 12dB/octave |
| Input Sensitivity | 200mV - 8V |
| Signal-to-Noise Ratio | > 90dB |
| Dimensions (W x H x D) | 12.2" x 2.1" x 7.1" |
| Weight | 4.5 lbs |
| Power Supply Voltage | 12V DC (10-16V) |
| Fuse Rating | 2 x 30A |
| Cooling Method | Convection |
| Installation | Professional installation recommended |
| Maintenance | Wipe with dry cloth; ensure proper ventilation |
| Safety Precautions | Disconnect battery before installation; avoid moisture |
| Included Accessories | Amplifier, mounting screws, user manual |
Frequently Asked Questions - Thunder TH800.4 MTX Audio
How do I bridge channels on the TH800.4?
To bridge channels, connect the positive speaker wire to the positive terminal of channel 1 and the negative wire to the negative terminal of channel 2. Similarly for channels 3 and 4. Set the mode switch to 'Mono' or 'Bridge' if available. Ensure the load impedance is 4 ohms or higher when bridged.
What is the RMS power output at 4 ohms?
The RMS power output is 100 watts per channel at 4 ohms for all four channels. When bridged, each pair delivers 300 watts RMS at 4 ohms.
Can I run 2 ohm speakers with this amplifier?
Yes, the TH800.4 is stable at 2 ohms per channel, delivering 150 watts RMS per channel. However, bridging into a 2 ohm load is not recommended as it may cause overheating or protection mode.
What size power wire should I use?
For optimal performance, use 4 AWG power wire for the main power and ground connections. The amplifier's total fuse rating is 60A, so 4 AWG is sufficient for runs up to 15-20 feet.
How do I adjust the gain settings?
Set the gain using a digital multimeter or by ear. Start with the gain at minimum, play a test tone at 0dB, then increase gain until the desired output without distortion. Avoid maxing out the gain to prevent clipping.
Does the amplifier have a remote bass knob?
The TH800.4 does not include a remote bass knob. However, you can use an aftermarket remote level controller if the amplifier has a remote input port (check manual).
What is the recommended subwoofer configuration?
You can power a single subwoofer by bridging channels 1/2 and 3/4, each into a 4-ohm load. For dual subwoofers, bridge each pair to a single sub. Ensure the total impedance per bridged channel is 4 ohms.
How do I connect this amplifier to my head unit?
Use RCA cables from the head unit's preamp outputs to the amplifier's input jacks. If your head unit lacks RCA outputs, use a line output converter (LOC) from the speaker wires.
What protection features does the amplifier have?
The amplifier includes protection against overheating, short circuits, and low impedance. If it goes into protection mode, check power supply, ground, speaker connections, and ensure proper ventilation.
Can I use this amplifier for a full-range front stage?
Yes, the TH800.4 is ideal for powering component speakers in the front and rear. Use the high-pass crossover to filter low frequencies to the speakers, and use the low-pass for subwoofers if needed.
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