Why does my HSU ULS-15 go into standby mode while playing?
Your HSU subwoofer might be entering standby mode due to an insufficient signal from the source. To resolve this, increase the source signal, or raise the subwoofer level in your Dolby Digital receiver's speaker setup menu, then reduce the subwoofer's volume to compensate. Alternatively, you can set the subwoofer's ON/AUTO/OFF switch to the ON position.
What to do if my HSU ULS-15 Subwoofer is making a humming or buzzing noise?
If your HSU subwoofer is producing a humming or buzzing noise, there could be several causes. First, disconnect all interconnects from the amplifier to see if the hum persists, indicating an amplifier problem. If the hum disappears, the issue may be with your speaker wires or interconnects; try replacing them or moving them away from AC cables and power transformers. Also, check if a light dimmer or other triac-based device on the same circuit is causing interference; if so, use an AC line filter or plug the unit into a different circuit. If the hum only occurs when certain equipment is connected, that equipment is likely the source of the hum.
What to do if there is no output from my HSU ULS-15 and the LED lights up red?
If your HSU subwoofer has no output and the LED is red, it might not be receiving a signal. Double-check the connections between your source and the subwoofer, ensuring you're using the subwoofer pre-out on your receiver if it has Dolby Digital. If you're using a wireless connection, verify that the transmitter is powered on, the 'Wireless/Wired' switch is set correctly, and the channel selections match. For a wired connection, ensure the 'Wired/Wireless' switch is set to 'Wired'.
Why is the bass output from my HSU ULS-15 so low?
If the bass output from your HSU subwoofer is low, the level on the subwoofer or the receiver’s subwoofer output may be too low. Try increasing the volume of the subwoofer and the subwoofer level or LFE level on the receiver or other source.
Why does my HSU ULS-15 Subwoofer thump when the system turns on and off?
If your HSU subwoofer thumps when the system is turned on or off, the noise is likely being generated by upstream equipment. To mitigate this, turn off the subwoofer first when shutting down your equipment and turn it on last when powering up.
Incorporates wireless technology for flexible subwoofer placement.
Features a patented XBL2™ motor design for exceptional linear motor force.
Utilizes a high headroom BASH® amplifier for low distortion and high output.
Offers multiple input options including XLR, RCA, wireless, and speaker level.
Delivers loud, clean, ultra deep bass from a compact, beautifully-finished unit.
Features ULF Trim control for accurate deep bass response in any room.
Caution against opening the unit to avoid risk of electric shock.
Warning to prevent fire or electric shock by keeping away from rain or moisture.
Guide to safely unpack the subwoofer, inspect for damage, and attach feet.
Guidelines for optimal subwoofer placement to affect bass quality and quantity.
Advice on keeping subwoofer away from electronics and optimal room positioning.
Connects to controllers with a dedicated subwoofer or LFE pre-out.
Connects to controllers with high-level speaker outputs for bass augmentation.
Details on XLR, Low Level, High Level inputs, and antenna placement.
Explanation of Volume, Phase, Power, Crossover, ULF Trim, and Voltage Selector.
Connects to stereo systems with low-level pre-outs for bass augmentation.
Guide to setting subwoofer volume for optimal sound and auto-on function.
Instructions for setting the crossover switch and frequency knob.
Adjusting ULF Trim for room gain and setting phase for smoother bass.
Procedure for using test tones to fine tune subwoofer response with an SPL meter.
Using controller equalizers to reduce room modes, avoiding boosting for nulls.
Diagnosing and resolving humming or buzzing noise issues in the system.
Troubleshooting standby mode, no sound output, and fuse issues.
Resolving no output, low bass, and system thumping when powering on/off.
Information on contacting technical support for repair authorization and assistance.
Technical details: frequency response, woofer size, amplifier power, dimensions, weight.
Details on warranty coverage, exclusions, and service requirements.
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