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Mackie Thump18s Owners Manual - Page 18

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18 Thump18S Powered Subwoofer Thump18S Subwoofer Block Diagram Thump18S Powered Subwoofer Full Range Output XLRs Input XLRs High Pass Output XLRs HPF Crossover HPF Crossover HPF Overexcursion Protection LPF Crossover OL LED Gain Polarity Invert Thermal Mute Limiter Amp - 6dB +6dB LEVEL Normal Inverted Thermal Monitoring

Section	Page
Front Cover	1
Important Safety Instructions	2
Contents	3
Features	3
Introduction	4
How to Use This Manual	4
Getting Started	4
Things to Remember	4
Hookup Diagrams	5
Thump18S Subwoofer: Rear Panel Features	9
1. Power Connection	9
2. Power Switch	9
3. Power LED	9
4. XLR Inputs	9
5. High Pass Outputs	10
6. Full Range Outputs	10
7. Level Knob / OL LED	11
8. Normal/Invert Switch (Polarity)	11
Questionnaire	11
Final Thoughts	11
Placement	12
Care and Maintenance	12
The Ins and Outs of Polarity	12
Protection Circuitry	13
Limiting	13
Overexcursion Protection	13
Thermal Protection	13
AC Power	13
Appendix A: Service Information	14
Appendix B: Connections	15
Appendix C: Technical Information	16
Specifications	16
Dimensions	17
Frequency Response Graph	17
Block Diagram	18