RTU8P - Subwoofer MTX Audio - Free user manual and instructions

Product Type	Amplified sealed flat subwoofer enclosure
Brand	MTX Audio
Model	RTU8P
Category	Subwoofer enclosure
Subwoofer	20 cm (8 inches)
Amplifier Type	Class AB Mono Block
Peak Power	600 W
RMS Power	150 W
Low Pass Filter	50 to 150 Hz (adjustable)
Bass Boost	0 to +12 dB at 45 Hz
Phase	0° or 180° (adjustable)
Input Sensitivity	0.1 to 4 V
Remote Control	EBC (included) for level adjustment
Inputs	RCA (low level) and high level (adapters included)
Dimensions (W x D x H)	345 x 242 x 78 mm
Weight	5 kg
Power Supply	+12 V vehicle battery (10 mm² cable recommended)
Fuse	15 A (replace with same rating)
Protection LED	Red (lights up for thermal protection)
Power LED	Red (lights up when amplifier is on)
Cleaning and Maintenance	Wipe with a dry, soft cloth. Do not use abrasive products.
Safety	Disconnect battery before installation. Use appropriate fuse. Do not run power cables near audio cables.
Installation	Recommended by a professional installer. Allow air for cooling.

Frequently Asked Questions - RTU8P MTX Audio

How to connect the RTU8P enclosure?

To connect the enclosure, start by disconnecting the battery. Connect the power cable (+12V) to the battery via a 15A fuse within 20cm. Connect the ground (GND) to a clean ground point on the chassis. If using RCA outputs from your source, connect RCA cables to the INPUT. If your source has no RCA outputs, use the included high-level adapters and connect them to the speaker wires. The remote (REM) is automatic if using high-level inputs; otherwise, connect the remote wire from the source. Finally, reconnect the battery and turn on the system.

How to adjust the gain (sensitivity)?

To adjust the gain, turn the Gain potentiometer to minimum (counterclockwise). Play a dynamic song at source volume at 3/4 of maximum. Slowly increase the gain until you hear distortion, then reduce slightly. The gain is not a volume; it aligns the amplifier sensitivity with the source.

What to do if the protection LED (Protect) lights up?

If the Protect LED lights up red, the amplifier is in thermal protection (too hot). Let the enclosure cool down. Check that air circulates freely around the amplifier. If the problem persists, check the speaker connections and impedance.

What power cable to use?

Use a 10 mm² 100% copper cable for power (+12V) and ground. Ensure the power cable does not run within 15 cm of audio cables or vehicle electrical system to avoid interference.

How to use high level inputs?

If your source has no RCA outputs, use the included High Level Input adapters. Connect the speaker wires from your source to the adapters, then connect the adapters to the "High Level Input" connector on the enclosure. The remote is automatic in this mode.

How to adjust the phase?

The phase adjustment (Phase) offers two positions: 0° or 180°. Try both positions while sitting in the front of the vehicle and keep the one that gives the most bass. This optimizes coherence between the enclosure and front speakers.

How to use the EBC control?

The EBC (External Bass Control) is a remote control included with the enclosure. Plug it into the EBC port. It allows you to adjust the subwoofer level from the front seats without accessing the enclosure.

How to adjust the low pass filter?

The low pass filter (LP X-over) is adjustable from 50 Hz to 150 Hz. Turn the potentiometer to select the cutoff frequency. A good starting point is at 12 o'clock (about 100 Hz). Adjust according to your front speakers for a smooth transition.

What type of fuse to use?

Use a standard 15 A fuse (blade type, ATO/ATC). Never use a fuse of higher rating, as it could damage the amplifier. Always replace with a new fuse of the same rating.

How to clean the enclosure?

To clean the enclosure, use a dry, soft cloth. Do not use abrasive products or solvents. Avoid getting connectors wet. If necessary, you can dust the subwoofer grille with a soft brush.

USER MANUAL RTU8P MTX Audio

Black electronic device with a speaker grille and 'MIX AUDIO' logo, no visible text or symbols on the device itself.

RTU8P

8" 20cm Underseat Powered Enclosure

150W RMS - 600W Peak

Designed by MTX in Phoenix, AZ - USA

Thank You!

Thank you for purchasing an MTX Audio High-End powered enclosure. Proper installation matched with MTX speakers and powered enclosures provide superior sound and performance for endless hours of waking the neighbors, slammin' your friends or flat out stomping wanna-be players. Congrats and enjoy the ultimate audio experience with MTX!

Specifications :

• Underseat sealed powered enclosure
• Subwoofer: 20cm (8")
  • Class-AB mono block amplifier
• Peak Power: 600W
  • RMS Power : 150W
  • Active X-over : variable 50\~150Hz
  • EBC remote included

• High and low level inputs
• Auto switch on with high-level inputs
- Input sensitivity: 0,1V\~4V
- Phase switch: 0^ or 180^
• Bass boost : @45Hz variable 0 to +12dB
- Dimensions : 345x242x78mm
• Weight : 5Kg

Control Panel on the Amplifier :

MTU8P 8" 150W RMS Powered Enclosure MTX® AUDIO Ch.1 Ch.2 6 High Level Input 8 4V-0,1V Gain Bass Boost LP X-over EBC Remote Phase Power On 15A 10 LeftRight 7 12 13 9 0° 180° 4 Protect. 1 Power 1 2 3 +12V REM GND

Power Terminal (+12V): This is the main power input for the amplifier and must be connected directly to the positive terminal of the vehicles battery for proper operation. Use caution when installing (+12V) power cable in the vehicle. Avoid running this cable parallel with RCA cables, antennas, or other sensitive equipment due to massive currents that can induce noise into the audio system. It is also very important to have a tight, secure connection for maximum performance. MTX recommends using a minimum of 6mm² full copper power wire with the MTX RTU8P.
2 Remote Terminal (REM) : The amplifier can be turned on by applying 12 volts to this terminal. Typically this voltage is supplied by a wire from the source unit marked "remote" or "power antenna". Note : If you use the high level inputs, the remote function is automatic. You don't need to connect this cable.
3 Ground Terminal (GND) : A proper ground is required for your amplifier to operate at peak performance. A short ground cable the same diameter as the power cable should be used to attach the ground terminal directly to the chassis of the vehicle. Always remove paint, dirt or debris to expose bare metal where the ground will be attached.
4 Protection LED (Protect.) : When the amp is in thermal protection, the LED turns to red.
5 PowerOn LED (Power On): The LED illuminates red when the amp is switched on.
6 RCA Inputs (Input) : These RCA inputs are used with source units that have RCA or Line level outputs. (Source units need a minimum level of 100mV output for proper operation of the amplifier). MTX recommends only high quality RCA cables to decrease the possibility of radiated noise entering the system.
7 Gain Control (Gain): The gain control matches the input sensitivity of the amplifier to the source unit being used. The operating range varies from 100mv to 4V. Adjusting the gain:
1. Turn the gain control on the amplifier all the way down (counter clockwise).
2. Turn up the volume control on the source unit to approximately 3/4 of maximum.
3. Adjust the gain control on the amplifier until audible distortion occurs.
4. Adjust the gain control down until audible distortion disappears.
5. The amplifier is now calibrated to the output of the source unit.

8 Speaker level inputs (High Level Input) : This input will allow the amplifier to operate from source units with speaker-level outputs. Output speaker leads from the source unit should be tied directly to the wire harness provided with the amplifier. Note : If you use the high level inputs, the remote function is automatic.

Bass remote control port (EBC Remote) : use this port to connect the optional MTX EBC. It allows you to control the output level siting at the front of the car.

15A Fuse (15A): When the fuse blows, replace it with the same value. Never use a higher rated fuse!

Phase switch (Phase) : two positions are available - 0° or 180°. Always try both and keep the one that produces more bass sitting at the front.

Bass Boost (Bass Boost): It allows to raise the bass level @ 45Hz from 0dB to +12dB. Use it with moderation...

Low Pass X-Over Frequency Control (LP X-over): Used to select the desired low-pass (LP) x-over frequency. The frequency is adjustable from 50Hz to 150Hz.

Installation & Mounting :

MTX recommends your new MTX RTU8P to be installed by an Authorized MTX retailer. Any deviation from specified installation instructions can cause serious damage to the amplifier, speakers and/or vehicles electrical system. Damage caused from improper installation is NOT covered under warranty. Please verify all connections prior to turn on your system!

1. Disconnect the vehicle's negative battery cable.
2. Determine the mounting place for your MTX RTU8P. Keep in mind there should be sufficient air flow for proper cooling.
3. Install a positive (+) power cable from the vehicle's battery through the firewall using a grommet or firewall bushing to avoid cable damage from sharp edges of the firewall. Run the cable through the interior of the vehicle and connect it to the amplifier (+12V) terminal (1). Do Not connect to the battery at this time. Note: Use only proper gauge wire for both positive and negative connections.
4. Install a circuit breaker or fuse within 20cm of the battery. This effectively lowers the risk of severe damage to you or your vehicle in case of a short circuit or accident. Make sure the circuitbreaker is switched off or the fuse is taken out of the fuse holder until all connections are made. Now connect your positive power cable to the positive battery terminal of the battery.
5. Grounding - Locate a proper ground point on the vehicle's chassis and remove all paint, dirt or debris to reveal a bare metal surface. Attach the ground wire to that contact point. Connect the opposite end of the ground wire to the (GND) terminal on the amplifier (3).
6. Connect a remote turn-on wire from the source unit to amplifier remote terminal (2). If the source unit does not have a dedicated Remote Turn-on lead, you may connect to the source unit's Power Antenna lead.
7. Connecting signal cables to the amplifier: There are two ways to supply the signal to your MTX RTU8P.

- To get maximum performance, we suggest connecting a high quality RCA to the corresponding outputs at the source unit and inputs of the amplifier (6).

- If a source unit is being used without RCA outputs, use the included high-level amplifier's speaker terminals (8) using the right gauge speaker wire.

1. Double check all previous installation steps, in particular, wiring and component connections. Once verified, reconnect the vehicle's negative battery cable, turn the circuit breaker on or place the fuse in the fuse holder.

Note : Gain Levels on the amplifier should be turned all the way down (counter clockwise) before proceeding with adjustments.

How To Stay Tuned :

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Vielen Dank!

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Grazie!

MTX® AUDIO RTU8P 8" 150W RMS Powered Enclosure Ch.1 Ch.2 6 High Level Input Gain Bass Boost LP X-over EBC Remote Phase Power On 15A 10 5 4 Protect. 7 12 13 9 180° LeftRight 11 12 3 Power +12V REM GND

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Obrigado!

MTX® AUDIO RTU8P 6" 150W RMS Powered Enclosure High Level Input Gain Bass Boost LP X-over EBC Remote Phase Power On 15A 10 4 5 4 Protect. 1 2 3 +12V REM GND

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Bedankt!

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Спасибо!

MTX® AUDIO RTU8P 6" 150W RMS Powered Enclosure High Level Input Gain Bass Boost LP X-over EBC Remote Phase Power On 15A 10 Power 4 +12V REM GND LeftRight 7 12 13 9 0° 180° Protect.

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Multumesc!

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Esipuhe

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MX®

AUDIO

MTX is proud to be an

American Audio Company since 1971.

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MTX is a proud member of Mitek Corp high quality consumer audio product lines.

MiTek Corporation

Designed and Engineered by Mitek in Phoenix - AZ, USA

Assembled in PRC. © 2018 Mitek. All rights reserved.

MTX is a registered trademark of Mitek.

Due to continual product development, all specifications are subject to change without notice.

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