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Thank you for your purchase of the NHT SA-2 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 on page 16 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-2 packaging to protect the amplifier in the event that you move or transport it.
1
Table of Contents
I. Specifications 2
Placement 2
Front and Back Panel Diagrams 3
General Connections 4
Low-Pass Filter 4
High-Pass Filter 4
Subwoofer Phase 4
Subwoofer Volume Control 5
II. The SA-2 and SW2Si: The SW2Pi Powered Subwoofer System
Connection Methods 5
Fine Tuning the Subwoofer 10
III. Multiple Subwoofer Configurations: Using two SW2Si subwoofers 11
Connection Method 11
IV. The SA-2 and Biamplification 11
Connection Methods 12
Recommended Biamplification Settings 15
Bass Tuning Methods 15
V. Operation 15
Maintenance 15
Changing the Line Voltage Setting 15
Changing the Fuse 15
Troubleshooting 16
Glossary of Terms 16
VI. Warranty Information 17