Thunder TH1400.5 - Receiver MTX Audio - Free user manual and instructions
Find the device manual for free Thunder TH1400.5 MTX Audio in PDF.
Pick your language and provide your email: we'll send you a specifically translated version.
| Product Type | Car Audio Amplifier |
| Brand | MTX Audio |
| Model | Thunder TH1400.5 |
| Number of Channels | 5 channels |
| RMS Power (4Ω) | 75W x 4 + 300W x 1 |
| Peak Power | 1400W max |
| Frequency Response | 10 Hz – 30 kHz |
| Input Sensitivity | 150 mV – 6 V |
| Built-in Crossover | LP/HP variable (50–200 Hz) |
| Bass Boost | 0–12 dB @ 45 Hz |
| Power Wire Gauge | 4 AWG recommended |
| Fuse Rating | 2 x 30 A (typical) |
| Dimensions (H x W x D) | 2.5" x 12.5" x 6.5" |
| Weight | 5.2 lbs (2.36 kg) |
| Construction | Aluminum heat sink |
| Protection Circuitry | Thermal, overload, and short-circuit |
| Input Connections | RCA and high-level speaker level |
| Remote Turn-On | YES (12 V trigger) |
| LED Indicators | Power and protect LEDs |
| Compatibility | Standard car stereo systems |
Frequently Asked Questions - Thunder TH1400.5 MTX Audio
What is the recommended power wire gauge for the MTX TH1400.5?
Use 4 AWG power and ground wires for the TH1400.5. If the amplifier is mounted near the battery, you may use 8 AWG for short runs, but 4 AWG is recommended for optimal performance and to reduce voltage drop.
How do I connect the remote turn-on wire?
Connect the remote turn-on wire from your head unit’s REM output to the REM terminal on the amplifier. If your head unit lacks a remote output, you can use a manual toggle switch to 12 V power, but ensure it is switched off with the ignition to avoid battery drain.
Can I bridge the amplifier channels?
Yes, the front and rear output channels can be bridged. For maximum safety, bridge the front left/right pair into one mono channel and the rear pair into another, maintaining a 4-ohm minimum load when bridged.
What should I do if the amplifier goes into protect mode?
First, check for short-circuits or loose connections at the speakers and power wires. Then verify the impedance of your speaker load is 2 ohms or higher per channel. Also, ensure the amplifier isn’t overheating. If protect mode persists, disconnect all inputs and outputs and try again.
How do I set the gain correctly?
Play a 0 dB test tone at your head unit’s maximum clean volume (usually 75-80%). Slowly turn the gain knob clockwise until the output distorts, then back it off slightly until the distortion disappears. Set crossovers before final gain adjustment.
What is the difference between low-level and high-level inputs?
Low-level inputs (RCA) accept a pre-amplified signal from your head unit, while high-level inputs accept the speaker-level signal from your factory stereo. High-level inputs are useful if your source unit lacks RCA outputs, and they include a signal-sensing turn-on option.
Does this amplifier have a subsonic filter?
The TH1400.5 includes a subsonic (infrasonic) filter on the subwoofer channel, typically set around 20-25 Hz. This removes low frequencies that your subwoofer can’t reproduce, protecting it from excessive cone movement.
How do I connect multiple speakers to the amplifier?
Ensure the total impedance per channel remains at 2 ohms or higher (4 ohms when bridged). You can wire speakers in series or parallel, but always calculate the final load. Refer to your speaker’s impedance ratings and never exceed the amplifier’s specs.
What is the recommended fuse rating for the power wire?
Install an inline fuse rated at 60 amps within 18 inches of the battery. This matches the amplifier’s two 30-amp internal fuses. Use a high-quality AGU or ANL fuse holder with 4 AWG wire.
How can I reduce engine noise (alternator whine)?
Run RCA cables away from power wires and route them on the opposite side of the vehicle. Use a ground loop isolator on the RCAs if necessary. Ensure a solid chassis ground for the amplifier, and check the head unit’s ground as well. Also, use high-quality ring terminals and clean metal surfaces.
User questions about Thunder TH1400.5 MTX Audio
0 question about this device. Answer the ones you know or ask your own.
Ask a new question about this device
No questions yet. Be the first to ask one.
Download the instructions for your Receiver in PDF format for free! Find your manual Thunder TH1400.5 - MTX Audio and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. Thunder TH1400.5 by MTX Audio.
USER MANUAL Thunder TH1400.5 MTX Audio
Manual assistant
Powered by Anthropic
Waiting for your message
Product information
Brand : MTX Audio
Model : Thunder TH1400.5
Category : Receiver