L-Acoustics MTD Series, Руководство оператора

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L-ACOUSTICS MTD Manual V1.2 11/30/2004
18
2.2 POWERING MTD112b
Continuous (rms) and peak power handling ratings for the MTD112b 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 MTD112b enclosures
are given in Table 4.
Table 4: Load and Power Ratings for MTD112b
MTD112b ENCLOSURE RATINGS
ONE MTD112b TWO MTD112b THREE MTD112b FOUR MTD112b
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 5. Boldface settings indicate a good power match based
on the recommended power amplifier specification.
Table 5: Recommended power amplification and MLS switch settings for MTD112b
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 MTD112b
are summarized in Table
6 and Figure 6 shows the location of MLS switches on the LA24a and LA48a rear panel.
Table 6: Recommended MLS switch settings for powering MTD112b
MTD112b MLS SWITCH SETTING
LA15a LA17a LA24a LA48a
0 dB 0 dB -2 dB -4 dB