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Turning the subwoofer ON for the first time

On the subwoofer, check that the phase switch is at 0 degrees, the volume level knob is at the minimum, and the crossover is at 90 Hz 
if using the subwoofer’s crossover. Run the power cord from the wall to the subwoofer and flip the power switch to the AUTO-ON or
ON position.

Step 4: Volume Level

Set the volume knob to the 9 o’clock position to start. Many people use ordinary music recordings or 
soundtracks for setting the subwoofer’s volume level. If you are using this method, try adjusting the sub-
woofer’s volume level so it matches the main speakers at the listening position. Since most people do not
listen to material at very loud reference levels and the ears are less sensitive to bass at lower levels, some
listeners prefer to set the bass level a little higher than the main speakers. A good approach is to set the
subwoofer level to the highest level where it sounds nice and where bass and kick drums still sound tight
and non-boomy. For home theater applications, most prefer to set the subwoofer level higher than the other
speakers. We suggest setting it about 3 dB higher. Some processors/receivers allow you to set different
bass levels for different sources.

Optional: subwoofer integration will be more accurate when using test tones and a SPL meter. See Step 6 (Fine Tuning).

Step 5: Crossover

If you are using the SUBWOOFER or LFE output on your controller, you may optionally set the CROSSOVER switch to OUT. This lets
the controller handle the crossover between the subwoofer and other speakers. However, if the bass sounds boomy, it may sound better
with the crossover switched IN and the CROSSOVER FREQUENCY set to 90 Hz. You may skip the rest of this step.

If you are using the HIGH LEVEL speaker connections, you will be using the subwoofer’s crossover. Look up the lowest frequency your
left and right speakers will output (the frequency they are“ -3 dB” at) and set the crossover approximately to this point. Play program mate-
rials with steady, consistent bass around this frequency such as filtered pink noise or music containing bass drums, double basses, bass
guitar, etc. Turn the crossover to the left until you hear the subwoofer and L/R speakers as 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 crossover to remove upper bass and midrange from the subwoofer when CROSSOVER is
switched IN. This makes your subwoofer non-directional. Unlike many other subwoofers on the market, the 24 dB/octave slope stays
steep at all available frequencies, not just the high ones.

Step 6: Fine Tuning

Now that the basic setup is complete, it’s time for optimization. Mark down the current volume and crossover settings with a soft pencil
so you can go back to where you started.

Variable Tuning

By adding or removing a foam port plug(s) and flipping a switch on the sub amplifier, the user can operate this subwoofer in one of five
different hybrid operating modes, providing the user with ultimate performance and flexibility for virtually all types of music and movie
program material.

1) Ported Max Output Mode: 2 ports open, and operating mode switch set to ‘EQ2”. This mode is ideal for those with medium-to-large 

room sizes who listen at high playback levels and want the strongest mid-bass possible. NOTE: Never operate the subwoofer with 2
ports open and operating mode switch set to ‘EQ1’, as this may damage the driver and void the warranty.

2) Ported Max Extension Mode: 1 port open, and operating mode switch set to ‘EQ1’. This mode is ideal for those with medium-to-large

room sizes, or small to medium rooms but who listen at low-to-moderate playback levels where the rising low bass from room gain
will help compensate for the ear’s insensitivity to bass at lower levels.

3) Ported Max Headroom Mode: 1 port open, and operating mode switch set to ‘EQ2’. This mode is ideal for those with medium-to-

large room sizes who listen at high playback levels and want the deepest bass extension.

4) Sealed Max Extension Mode: 0 ports open, and operating mode switch set to ‘EQ1’. This mode is ideal for those who prefer a sealed

box sound and deepest bass extension.

5) Sealed Max Headroom Mode: 0 ports open, and operating mode switch set to ‘EQ2’. This mode is ideal for those who want the sealed

box sound and listen at high playback levels.

Содержание VTF-15H

Страница 1: ...und 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 finishes rounded corners and edges and front firing woofer and ports allow for close placement next...

Страница 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...

Страница 3: ...hard drives from being erased Rules of thumb for placement Avoid the center of the room In general avoid placing the subwoofer half way between the front and back walls This is where you get a strong null from your room s standing waves 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 S...

Страница 4: ...ord This wire is not included with your subwoofer but can be purchased at electronic or home improvement stores Strip 1 2 of insulation from each end of the wire to expose the bare metal If your speaker wire is fraying 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 a...

Страница 5: ...er to the left until you hear the subwoofer and L R speakers as 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 crossover to remove upper bass and midrange from the ...

Страница 6: ...0Hz when using 80Hz 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 ...

Страница 7: ...r 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 ...

Страница 8: ...from the receiver 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 Ra...

Страница 9: ...U shall 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 limi tations and exclusions may not apply This Warranty Does Not Cover Damage caused by abuse accident mis use ...

Страница 10: ...10 Notes ...

Страница 11: ...11 Notes ...

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

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