L-ACOUSTICS LA15a 115V Manual V1.0 27/01/2003
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4. REAR PANEL FEATURES
4.1 IMPEDANCE MATCHING (MLS SWITCH)
The MLS™ (Minimum Load Select) switches located on the rear panel (2) offer power/impedance
matching, allowing the LA15a to power 2 ohm loads without increased heat loss. Please refer to Table
1 to determine the power delivered into a specific load for various MLS switch settings. Note that
higher powers can be achieved utilising higher MLS positions when connected to lower speaker
impedances and as can be seen in Table 1, the LA15a can produce output power in excess of 380 watts.
Essentially, the LA15a amplifier is a power converter and by selecting MLS positions you are allocating a
portion of the available 1200 watts power.
Figure 3: LA15a Rear Panel MLS Switches
Table 1: Output Power Ratings and MLS Switch Settings for the LA15a
LA15a
LOAD CONFIGURATION
-3 dB
0 dB
16 ohms Quad (4 channel)
95 W
200 W
8 ohms Quad (4 channel)
200 W
370 W
4 ohms Quad (4 channel)
380 W
600 W
2 ohms Quad (4 channel)
500 W
n/a
16 ohms Stereo (2 channels bridged)
380 W
740 W
8 ohms Stereo (2 channels bridged)
760 W
1200 W
4 ohms Stereo (2 channels bridged)
1000 W
n/a
Power in watts (EIA 1 kHz, 1% THD)
