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CONTENTS
Safety Information............................................................................................................................ 3
Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 4
Warranty Information ....................................................................................................................... 4
Table 1. Amplifier Comparison Chart................................................................................................ 4
AmPlus™ 100 Amplifier Specifications ......................................................................................... 5
AmPlus 50 Amplifier Specifications ............................................................................................... 6
AmPlus 100 Theory of Operation .............................................................................................. 7-10
AmPlus 50 Theory of Operation ................................................................................................... 11
Figure 1. AmPlus 100 Amplifier block diagram............................................................................... 12
Figure 2. AmPlus 50 Amplifier block diagram................................................................................. 13
AmPlus 100 Amplifier Controls................................................................................................ 14-15
AmPlus 50 Amplifier Controls....................................................................................................... 16
Disassembly/Assembly Procedures ....................................................................................... 17-18
Figure 3. AmPlus 100 Amplifier exploded view .............................................................................. 19
Figure 4. AmPlus 50 Amplifier exploded view ................................................................................ 20
AmPlus 100 Test Setup Parameters ............................................................................................. 21
Table 2. AmPlus 100 Initial Switch Settings ................................................................................... 21
Table 3. AmPlus 100 Signal Inputs table........................................................................................ 21
Table 4. AmPlus 100 Signal Outputs table ..................................................................................... 21
AmPlus 100 Test Procedures ................................................................................................... 22-25
Table 5. Source Input to 70/100V Speaker Output test table ......................................................... 22
Table 6. Source Input to 4Ω Speaker Outputs ............................................................................... 24
Table 7. Bass Performance tests ................................................................................................... 24
AmPlus 50 Test Setup Parameters ............................................................................................... 26
Table 8. AmPlus 50 Initial Switch Settings ..................................................................................... 26
Table 9. AmPlus 50 Signal Inputs table.......................................................................................... 26
Table 10. AmPlus 50 Signal Outputs table ..................................................................................... 26
AmPlus 50 Test Procedures ..................................................................................................... 27-30
Table 11. Source Input to 70/100V Speaker Output test table ....................................................... 27
Table 12. Source Inputs to 4Ω Speaker Output ............................................................................. 29
Table 13. Bass Performance tests ................................................................................................. 29
Installation Diagram Notes:........................................................................................................... 31
Figure 5. AmPlus 100 Simple Mono Installation............................................................................. 32
Figure 6. AmPlus 100 Large Mono Installation using Mixer Feature.............................................. 33
Figure 7. AmPlus 100 70/100 Volt Mode/Model 1B Acoustimass
®
Bass Module Installation......... 34
Figure 8. AmPlus 100 Installation with Two 70/100V Listening Zones ........................................... 35
Figure 9. AmPlus 50 Simple Mono Installation............................................................................... 36
Part List Notes................................................................................................................................ 37
Main Part List AmPlus 100 Amplifier (see Figure 10) ................................................................. 38
Figure 10. AmPlus 100 Amplifier exploded view ............................................................................ 39
Main Part List AmPlus 50 Amplifier (see Figure 11).................................................................... 40
Figure 11. AmPlus 50 Amplifier exploded view .............................................................................. 41
Electrical Part List ..................................................................................................................... 42-46
Resistors ................................................................................................................................... 42-43
Capacitors ................................................................................................................................. 43-44
Diodes ............................................................................................................................................ 44
Transistors...................................................................................................................................... 44
Integrated Circuits .......................................................................................................................... 45
Miscellaneous ........................................................................................................................... 45-46
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