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Subwoofer Manual

Features

Variable Tuning Hybrid Technology.

“Now you decide how deep to play.”

The large flared ports can be re-tuned with the flip of a switch and

the addition or removal of a port plug(s). With support for five different operating modes, including ported
and sealed hybrid modes, this subwoofer offers state-of-the-art performance in virtually all rooms.

Custom built woofers.

“The end of featureless boom.”

We design our woofers for sound quality, so you will hear clean and detailed

bass not found in lesser subwoofers.

Powerful BASH amplifiers.

Our custom built amplifiers have ultra-high headroom, soft clipping, subsonic filtering, adjustable Q, and
class A/B output stage to provide extremely high fidelity, low distortion, and high output.

Flexible room placement.

The luxurious and smooth non-vinyl finish, rounded corners, and overall design allows for close placement
next to listeners or discreet placement in corners.

Connects to almost any system.

“Integration is easier than ever.”

Thanks to modern receivers that use Dolby Digital, DTS, THX, or Bass 

Management, you can connect the subwoofer to your system with one cable. If you have invested in a
stereo-only system, integration is also simple thanks to true 24 dB/Oct low pass filters.

MK 4

Summary of Contents for VTF-3 MK 4

Page 1: ...oofers Powerful BASH amplifiers Our custom built amplifiers have ultra high headroom soft clipping subsonic filtering adjustable Q and class A B output stage to provide extremely high fidelity low distortion and high output Flexible room placement The luxurious and smooth non vinyl finish rounded corners and overall design allows for close placement next to listeners or discreet placement in corne...

Page 2: ...particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Unplug this apparatus during lightning storms or when unused for long periods of time 12 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen i...

Page 3: ...s You should also avoid sitting in that area No matter how powerful the subwoofer is there will not be much bass around the center of the room Use corner placement Subwoofers usually sound best tucked in a corner A good corner is far from wall divisions and has at least 6 feet of wall to either side If you have more than one good corner use the one farthest away from large room openings or the one...

Page 4: ...r speaker wire is fray ing tightly twist the metal Unscrew the plastic hex nut on the binding post to insert the exposed wire into the hole Tighten the binding posts by hand Run the wires from your system s amplifier to the subwoofer s HIGH LEVEL INPUTS For each channel run wire from the red out puts on the amplifier to the subwoofer s red inputs and from the black outputs on the amplifier to the ...

Page 5: ...separate sources Slowly turn the control back to the right until the sound of all three speakers is well integrated When using tiny front speakers that don t have much bass the 90 Hz setting on the control will probably yield the best results Your subwoofer has a sharp 24 dB octave low pass filter to remove upper bass and midrange from the subwoofer when CROSSOVER is switched IN This makes your su...

Page 6: ...z crossover 5 Adjust the subwoofer level so that the lower range average equals the upper range average ie if the lower range average is 5dB more than the upper range average then adjust the subwoofer level down by 5dB If your controller allows you to adjust subwoofer channel level use this to adjust the subwoofer level Otherwise simply adjust the subwoofer volume knob instead A less accurate meth...

Page 7: ...or damage Also poorly shielded cables can potentially pick up noise Try another interconnect or speaker wire Also move the signal cable away from AC cables power transformers or other EMI sources Use an AC line filter or plug the unit into a different circuit If hum goes away when interconnects are disconnected the hum is coming from the rest of your equipment Add them back one piece at a time The...

Page 8: ...eiver amplifier to the of the subwoofer s speaker level input Connect only to the channel that has a true ground If neither channel has a true ground e mail call technical support Increase the volume of the subwoofer and the subwoofer level or LFE level on the receiver or other source It is best to set the level of the subwoofer relative to the other speakers using a test disk and a Radio Shack SP...

Page 9: ...ll not be liable for incidental or consequential damages of any kind or character because of product defects Some states do not allow limitations on how long an implied warranty lasts and or do not allow the exclusion or limitation of incidental or consequential damages so the above limitations and exclusions may not apply This Warranty Does Not Cover Damage caused by abuse accident mis use neglig...

Page 10: ...10 Notes ...

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Page 12: ...12 HSU Research 985 N Shepard St Anaheim CA 92806 1 800 554 0150 HSURESEARCH COM ...

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