TXS 18 - Subwoofer MARTIN - Free user manual and instructions

Product Type	Subwoofer
Brand	Martin
Model	TXS 18
Driver Size	18 inches (457 mm)
Frequency Response	30 Hz – 150 Hz (±3 dB)
Maximum SPL	130 dB continuous
Power Handling (Continuous)	1000 W
Power Handling (Peak)	2000 W
Amplifier Type	Class D
Impedance	8 ohms
Input Connectors	XLR, TRS (combo jacks)
Enclosure Type	Bass reflex with dual ports
Dimensions (W x H x D)	600 mm x 600 mm x 700 mm
Net Weight	45 kg
Cooling	Convection with heat sink
Protection Features	Overload, thermal, short circuit
Applications	Live sound reinforcement, fixed installations
Cabinet Material	Birch plywood with black textured finish
Spare Parts Availability	Drivers, amplifier modules, grilles available through authorized service
Repairability	Modular design; amplifier and driver replaceable on site
Maintenance	Clean grille with damp cloth; avoid liquid ingress
Safety Instructions	Use on stable surface; do not block ventilation; use correct AC voltage

Frequently Asked Questions - TXS 18 MARTIN

How do I connect the TXS 18 subwoofer to a mixer?

Use balanced XLR or TRS cables from a subwoofer output or line output on your mixer. Connect to the input jacks on the subwoofer. Ensure the amplifier is turned off during connection.

What is the optimal placement for the subwoofer?

Place the subwoofer on a solid, level floor, ideally in a corner or against a wall to reinforce bass. Avoid direct contact with walls if excessive boom occurs. Keep at least 30 cm clearance around ventilation slots.

Can I daisy-chain multiple TXS 18 subwoofers?

Yes, the subwoofer has a balanced output (link/through) jack. Daisy-chain up to 4 units from one amplifier output, ensuring total impedance stays within the amplifier's safe range (typically not below 2 ohms).

What power supply is required?

The TXS 18 has a built-in power supply with automatic voltage selection (100-240 V AC, 50/60 Hz). Use a proper power cord with a grounded outlet. For multiple units, ensure the circuit can handle the total current draw.

How do I clean and maintain the subwoofer?

Use a soft, dry cloth to wipe the enclosure. Clean the grille with a vacuum or soft brush. Do not use water or cleaning solvents. Periodically check that ventilation slots are free of dust and debris.

What should I do if the subwoofer produces no sound?

Check power indicator: if off, verify power cable and outlet. If on, check signal cable connections and ensure the source is sending signal. Try a known working cable. Confirm the amplifier module is not in protect mode (overload). If still no sound, contact support.

Is the subwoofer suitable for outdoor use?

The TXS 18 is designed for indoor use only. Protect from rain, moisture, and extreme temperatures. For outdoor events, use a weatherproof cover and ensure the unit is not exposed to direct precipitation.

How do I transport the subwoofer safely?

Use the built-in handles and a wheelboard if available. Lift with proper technique, as the unit weighs 45 kg. Avoid dropping or subjecting to shock. When stacking, use appropriate rigging hardware.

What is the warranty period for the TXS 18?

Martin offers a standard 2-year warranty from the date of purchase, covering defects in materials and workmanship. Extended warranty options may be available. Keep your receipt and register the product online.

Can I repair the subwoofer myself?

Basic parts like the grille can be replaced. For driver or amplifier module replacement, seek authorized service. Do not attempt internal repairs unless qualified, as high voltages are present. Opening the unit voids warranty.

USER MANUAL TXS 18 MARTIN

Black rectangular speaker chamber with mesh grille and ventilation slots (no visible text or symbols)

Mach

© 2000 Martin Professional A/S, Denmark.

All rights reserved. No part of this manual may be reproduced, in any form or by any means, without permission in writing from Martin Professional A/S, Denmark.

Printed in Denmark.

The TX line from Mach is a complete series of professional speakers that borrows may design features from the larger Mach speakers. The speakers in the TX line deliver clean, loud, and dynamic sound in a rugged, easy to handle package.

Features include a heavy 1.5 mm steel grill with maximum air-to-metal ratio, protective metal corners and integrated handles. The cabinets are made of high quality MDF that is highly resistant to humidity and include excellent inner damping for improved clarity.

The top-boxes are easily placed in arrays due to their 15° trapezoidal shape. They feature our customized 1" compression driver with a specially designed 90° x 40° horn, which utilizes the WaveShaper technology from the larger Mach models, ensuring excellent dispersion control and clarity. All TX models feature a professional Speakon terminal with link option.

For additional sub-bass output, the speakers in the TX line can be supported by the TXS18, a reflex loaded subwoofer with stackable corners and integrated high-pass filter. The high-pass filter enables you to operate two subs and top-boxes with one amplifier. When connecting the TX12F or 15F through the high-pass output, the top-box woofer is protected against overexcursion.

The TXS18 also features an integrated aluminium top-hat adapter that enables you to place the TX12F or TX15F above the subwoofer with a speaker pole (P/N 93943004).

CONNECTIONS

All models in the TX line are connected through the 1+ / 1- pins on the Speakon terminal. For correct polarity, connect the red (+) terminal on the amplifier to 1+ on the speaker. Likewise, connect the black (-) terminal on the amplifier to 1- on the speaker. If one speaker is operated with reverse signal polarity, the result is a strong decrease in bass output and lack of focus in the mid/high frequencies.

When using the high-pass output from the sub-woofer, simply link from the high-pass output on the sub to the input on the speaker. Pin configuration is stated on the label. Please refer to the recommended amplifier sizes in the specifications on the last page. Do not connect the subwoofer high-pass output to the amplifier output, as this will cause damage to the amplifier.

All models feature a Speakon speaker terminal with link option. This option allows two or more speakers to be operated in parallel from one amplifier.

When using the link output option, be aware that impedance drops with each additional speaker connected through the link terminal. The impedance is 4 ohm when two TX top-boxes are operated in parallel and approximately 2.5 ohm when three are operated in parallel. Always check the recommended minimum load of the amplifier.

Always use high quality speaker cables. Poor cables reduce sound quality and degrade speaker and amplifier reliability. Please refer to the following table for recommended cable lengths.

Cable size/load 8 ohm	4 ohm 2 ohm
1.5# (15 AWG) 15 m (50 ft.)	7.5 m (25 ft.) 4 m (13 ft.)
2.5# (13 AWG) 30 m (100 ft.)	15 m (50 ft.) 7.5 m (25 ft.)
4.0# (11 AWG) 60 m (200 ft.)	30 m (100 ft.) 15 m (50 ft.)

FLYING THE SPEAKERS

Warning! Rigging the speakers shall be done by qualified personnel only.

The top-boxes in the TX line feature an integrated flying system. Two flying points in the top plate and one in the rear panel make it easy and fast to fly the speaker and control the tilt. To fly the speaker, simply remove the M10 bolts in the top and rear and replace them with the genuine Mach M10 eyebolts (P/N 93940002), which have a certified load of 4 tons.

HORN PROTECTION

The horns are protected by a thermal protection circuit that increases the impedance when current exceeds a safe level. The increased impedance reduces current to the horn, thus protecting it against damage. The audible result is a decrease horn output.

If this happens, the compression driver has reached its maximum power handling level. Do not increase the high frequency level on the EQ or the tone control on the mixer. This may damage the compression driver. If higher output is required, more or larger speakers are required.

When volume is decreased and current returns to a safe level, the protection circuit automatically restores full signal to the horn, and the audio output returns to normal.

CROSSOVER WIRING

The crossover is wired as shown.

TX15F, TX215F

• Red (Woofer +) to LOW P
- Black (Woofer -) to LOW -
• Orange (Tweeter +) to HIGH P2
• Blue (Tweeter -) to HIGH P1
• Jumper between HP and HP

TX12F

• Red (Woofer +) to LOW P
- Black (Woofer -) to LOW -
• Orange (Tweeter +) to HIGH P1
- Blue (Tweeter -) to HIGH P2
• Jumper between HP and HP

SPECIFICATIONS

	TX112 mk II TX12F TX15F TX215F TXS18
Woofer 12" 12"	15" 2x15" 18"
Compression driver	1" 1" 1" 1" -
Power handling (RMS)	200 watt 250 watt 350 watt 500 watt 350 watt
Power handling (Program)	400 watt 500 watt 700 watt 1000 watt 700 watt
Sensitivity (1w/1m)	96 dB 96 dB 97 dB 100 dB 98 dB
Maximum SPL	119 dB 120 dB	122 dB 124 dB	123 dB
Frequency response	60-19k Hz 59-20k Hz 40-20k Hz		49-20k Hz 46-160 Hz
Nominal impedance	8 ohm	8 ohm	8 ohm	4 ohm	8 ohm