Appendix C: TH-18s Specifications

Acoustic Performance

Frequency Range (–10 dB):

35 Hz – 150 Hz

Frequency Response (–3 dB):

50 Hz – 115 Hz

Max peak SPL (calculated)1:

129 dB

Max peak SPL (measured)2:

124 dB

Transducer

Diameter:

18 in / 457 mm

Voice coil diameter:

3 in / 76 mm

Diaphragm material:

Paper

Magnet material:

Ferrite

Power Amplifier

Rated Power:

500 watts rms

 

1000 watts peak

THD:

<0.1%

Design:

Class D

Cooling:

Convection

Input/Output

Input Type:

Female XLR Balanced

 

differential (stereo

 

left/right)

Input Impedance:

20 k balanced

Full Range Output:

Male XLR Balanced

 

(parallel with input)

High Pass Output:

Male XLR Balanced

Level Control:

–6 dB to +6 dB

Construction Features

Basic Design:

Trapezoidal

Material:

Void-free plywood

Finish:

Textured black catalyzed

 

polyurethane paint

Handles:

One on each side

Grille:

Perforated metal

Physical Properties

Height:

24.1 in / 612 mm

Front Width:

20.2 in / 513 mm

Rear Width:

15.1 in / 383 mm

Depth:

25.3 in / 643 mm

Weight:

73 lb / 33.1 kg

Mounting Method:

The TH-18s subwoofer is designed to sit on the floor or stage. It is NOT designed to be pole-mounted or suspended. The cabinet has no rigging points and is not suitable for rigging. Never attempt to suspend the TH-18s by its handles.

LOUD Technologies Inc. is always striving to improve our products by incorporating new and improved materials, components, and manufacturing methods. Therefore, we reserve the right to change these specifications at any time without notice.

“Mackie,” and the “Running Man” are registered trademarks of LOUD Technologies Inc. All other brand names mentioned are trademarks or registered trademarks of their respective holders, and are hereby acknowledged.

Electronic Crossover

Crossover Type:

24 dB/oct.

©2010 LOUD Technologies Inc. All Rights Reserved.

 

 

Linkwitz-Riley

 

Crossover Frequency:

125 Hz

15.1 in /

 

 

Protection Features

 

383 mm

 

WEIGHT

Over-excursion Protection:

40 Hz 24 dB/oct.

73 lb

 

Butterworth High

33.1 kg

 

Pass Filter

 

Thermal Protection:

Amplifier mute, auto

25.3 in /

643 mm

 

reset

 

Driver Protection:

Peak/RMS Limiter

 

Display LEDs:

Thermal, OL, Signal,

 

 

Power

 

AC Power Requirements

100-120 VAC, 50-60 Hz

 

US:

TH-18s

 

Fuse: T 6.3A H 250V

 

Europe:

220-240 VAC, 50-60 Hz

 

 

Fuse: T 3.15A H 250V

 

Power Consumption:

160 watts @ 1/4 power

20.2 in / 513 mm

AC Connector:

3-pin IEC 250 VAC,

 

 

15 A male

 

1Calculated from peak driver sensitivity and amplifier power, half space.

2Measured with swept sine at 1 W within operating range, scaled for max power, half space.

24.1in / 612 mm

16