Operation
We recommend that the SW10 ll or SW12 power be left on, which will allow the
Every speaker, has limits, and it's important to listen for them. Speaker damage most often results not from brief loud musical peaks, but from sustained high volume lev-
els in some or all frequencies. For this reason, extreme volume settings and excessive bass, treble or equalizer boosts are not recommended.
If you hear unusual distortion or breakup, or notice heat coming from the woofer, decrease volume immediately, neutralize any excess bass, treble or equalizer boosts, and avoid setting any controls to similar extremes again.
Maintenance
Your SW10 ll and SW12 is designed for years of use with no or minimal maintenance, as long as you avoid expos- ing it to direct sunlight, high temperatures, or moisture. Clean cabinets, when necessary, using a damp cloth or a mild,
9.8 Changing the Line Voltage Setting
The SW10 ll and SW12 were designed to operate on two line voltage settings, 115VAC and 230VAC. In the event that it is necessary to change the line voltage setting, begin by turning the power switch to the off position. Remove all the connections from the amplifier, including the detachable power cord. Using a flat blade screw- driver, slide the switch to the correct position. Use the 115VAC position for 110 to 120 VAC, and the 230VAC position for 220 to 240 VAC. Next you will likely need a power cord that fits the AC receptacle and you will need to replace the fuse (see "Changing the Fuse" below)
Changing the Fuse
The SW10 ll and SW12 amplifier's fuse is
To replace it:
•turn the power OFF
•unplug the power cord
•remove the fuse holder cover (above to the power inlet) with a flat blade screwdriver
•remove the fuse from the holder and replace it with the
appropriate type.
• reinstall the fuse holder
Always replace the fuse with one of the exact same specifications.
SW10 ll:
For systems operating at 115 volts, use only a 5x20 mm, T3A,
For systems operating at 230 volts, use only a 5x20 mm, T2.0A,
SW12:
For systems operating at 115 volts, use only a 5x20 mm, T5A,
For systems operating at 230 volts, use only a 5x20 mm, T2.5A,
Troubleshooting
If the SW10 ll or SW12 fails to operate at all when the Power Switch is turned on, thoroughly check the power cord, input and output connections
If the SW10 ll or SW12 turns on but the LED indicator fails to illuminate,
If the SW10 ll or SW12 turns on but its status LED stays red, the unit is gone into protect mode, which could be caused by incorrect wiring, short circuits, or excessive volume. Turn off the Power Switch on the subwoofer for two or more seconds to reset, and double check all speaker cables to be sure that no small metal strands are shorting the terminals.
If these steps don't restore the SW10 ll or SW12 to oper- ation, contact your local Authorized NHT Dealer or NHT for assistance.
Satisfaction
Your satisfaction with your new NHT SW10 ll or SW12 Subwoofer is important to us. Please note the matched products and accessories we provide for them, and your warranty, printed on the back of this manual. If you have any questions regarding your speakers' use, feel free to call NHT at 
