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Thank you for your purchase of the NHT SA-3 monaural subwoofer amplifier. Please take a few
moments to read through this Owner’s Manual prior to installing your new amplifier and/or subwoofer
system. The information provided can help you to obtain maximum performance from your audio
system. For your convenience, a glossary at the end of this manual explains some technical terms.
If you have questions or require assistance at any time during the installation or operation of your new
amplifier/powered subwoofer system, please call your local NHT dealer or our Toll-Free Customer
Service Hotline at:
1-800-NHT 9993
Please retain the SA-3 packaging to protect the amplifier in the event that you move or transport it.
1
Table of Contents
I. Specifications
Placement
Front and Back Panel Diagrams
General Connections
Low-Pass Filter
High-Pass Filter
Subwoofer Phase
Subwoofer Volume Control
II. The SA-3 and SW3S: The SW3P Powered Subwoofer System
Connection Methods
Fine Tuning the Subwoofer
Ill. The SA-3 and Biamplification
Connection Methods
Recommended Biamplification Settings
Bass Tuning Methods
lV. Operation
Maintenance
Changing the Line Voltage Setting
Changing the Fuse
Troubleshooting
Glossary of Terms
V. Warranty Information