L-Acoustics MTD Series User Manual

L-ACOUSTICS MTD Manual V1.2 11/30/2004 19
2.3 POWERING MTD115b (PASSIVE MODE)
Continuous (rms) and peak power handling ratings for the MTD11b (passive mode) are as follows:
46 volts rms long term (pink noise with 6 dB crest factor)
265 Watts (continuous), 1060 Watts (peak) at 8 ohms
Recommended power amplifier specification for powering single and multiple MTD115b enclosures in
passive mode are given in Table 7.
Table 7: Load and Power Ratings for MTD115b (passive mode)
MTD115b (PASSIVE MODE) ENCLOSURE RATINGS
ONE MTD115b (PASSIVE) TWO MTD115b (PASSIVE) THREE MTD115b (PASSIVE) FOUR MTD115b (PASSIVE)
LOAD RMS PEAK REC'D LOAD RMS PEAK REC'D LOAD RMS PEAK REC'D LOAD RMS PEAK REC'D
8 265 1060
530
4 530 2120
1060
2.7 795 3180
1590
2 1060 4240
2120
Based on these specifications, recommended L-ACOUSTICS LA power amplifier specifications and
MLS switch settings are summarized in Table 8. Boldface settings indicate a good power match based
on the recommended power amplifier specification.
Table 8: Recommended power amplification and MLS switch settings for MTD115b (passive mode)
RECOMMENDED AMPLIFIER OUTPUT POWER
POWER AMP (MLS SETTING)
LOAD POWER LA15a LA 17a LA 24a LA 48a
(ohms) (W)
2 2120 do not use 1200 1700
2000
(0 dB) (0 dB)
(-4 dB)
2.7 1590 do not use 1080
1635 1665
(0 dB)
(0 dB) (-4 dB)
4 1060 600
840 1300 1000
(0 dB)
(0 dB) (-2 dB) (-4 dB)
8 530 370
430 700 520
(0 dB)
(0 dB) (-2 dB) (-4 dB)
L-ACOUSTICS LA amplifier MLS switch settings for powering the MTD115b in passive mode are
summarized in Table 9 and Figure 6 shows the location of MLS switches on the LA24a and LA48a rear
panel.
Table 9: Recommended MLS switch settings for powering MTD115b (passive mode)
MTD115b (PASSIVE) MLS 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