83.4. Multi-functionDepending on the input switches on the MPA R (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)located on the rear panel, four different amplification configurations can be achieved:MPA4-150R MPA6-150R- 4 mono amplifiers with following possibilities: - 6 mono amplifiers with following possibilities:4 different mono inputs 6 different mono inputs1 common mono input for all 1 common mono input for all1 common stereo input for all 1 common stereo input for all- 2 stereo amplifiers with following possibilities: - 3 stereo amplifiers with following possibilities:2 different stereo inputs 3 different stereo inputs1 single stereo input for both 1 single stereo input for both- 2 bridged amplifiers with following possibilities: - 3 bridged amplifiers with following possibilities:2 different mono inputs 3 different mono inputs1 common mono input 1 common mono input1 common stereo input 1 common stereo input- Combinations between mono, stereo and bridged - Combinations between mono, stereo and bridgedOn the rear panel you can also activate the high-pass and low-pass filters:High-pass filter ON/OFF switch (27, 31). The cut-off frequency lies at 160Hz for amplifiers 3 and4 (5 and 6) simultaneously or when operating in bridged mode. This filter cuts out all frequencycomponents under 160Hz and passes the rest, being specially suited for connecting the mid-range andhigh frequency speakers.Low-pass filter ON/OFF (23). Filter with 160Hz cut off frequency for amplifiers 1 and 2 together orwhen working in bridge mode, which eliminates audio signals with frequencies higher than 160Hz andlets through those signals with frequencies lower than 160Hz.Combining one bridged amplifier with switched on low-pass filter together with a stereo amplifierwith switched on high-pass filter turns your multichannel power amplifier into an ideal equipment forclubs and other locations with a subwoofer, mid-range speakers and tweeters.