L-Acoustics MTD Series User Manual

L-ACOUSTICS MTD Manual V1.2 11/30/2004 17
2.1 POWERING MTD108a
Continuous (rms) and peak power handling ratings for the MTD108a are as follows:
45 volts rms long term (pink noise with 6 dB crest factor)
250 Watts (continuous), 1000 Watts (peak) at 8 ohms
Recommended power amplifier specification for powering single and multiple MTD108a enclosures
are given in Table 1.
Table 1: Load and Power Ratings for MTD108a
MTD108a ENCLOSURE RATINGS
ONE MTD108a TWO MTD108a THREE MTD108a FOUR MTD108a
LOAD RMS PEAK REC'D LOAD RMS PEAK REC'D LOAD RMS PEAK REC'D LOAD RMS PEAK REC'D
8 250 1000
500
4 500 2000
1000
2.7 750 3000
1500
2 1000 4000
2000
Based on these specifications, recommended L-ACOUSTICS LA power amplifier specifications and
MLS switch settings are summarized in Table 2. Boldface settings indicate a good power match based
on the recommended power amplifier specification.
Table 2: Recommended power amplification and MLS switch settings for MTD108a
RECOMMENDED AMPLIFIER OUTPUT POWER
POWER AMP (MLS SETTING)
LOAD POWER LA15a LA 17a LA 24a LA 48a
(ohms) (W)
2 2000 do not use 1200 1700
2000
(0 dB) (0 dB)
(-4 dB)
2.7 1500 do not use 1080
1465 1665
(0 dB)
(-2 dB) (-4 dB)
4 1000 600
840 1300 1000
(0 dB)
(0 dB) (-2 dB) (-4 dB)
8 500 370
430 700 520
(0 dB)
(0 dB) (-2 dB) (-4 dB)
L-ACOUSTICS LA amplifier MLS switch settings for powering the MTD108a are summarized in Table
4 and Figure 6 shows the location of MLS switches on the LA24a and LA48a rear panel.
Table 3: Recommended MLS switch settings for powering MTD108a
MTD108a MLS SWITCH SETTING
LA15a LA17a LA24a LA48a
0 dB 0 dB -2 dB -4 dB

L-Acoustics MTD Series Specifications

General

Brand	L-Acoustics
Model	MTD Series
Category	Speakers
Language	English