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User's Manual

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FUSE

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Control Panel Features

1. Power/Auto on Indicator

This light is bright when the subwoofer
is on, and dim when the subwoofer is
in its standby mode. This is controlled
by the AUTO ON/OFF circuit.

 

The

presence of an audio signal turns the
unit on. After approximately fifteen
minutes of signal absence, the
subwoofer will go to its standby mode.

The light will only go off when the unit
is unplugged from the wall.

2. Volume Control

This control lets you match the output
level of the subwoofer to the level of
your satellite/main speakers. The
subwoofer output will increase as the
volume control is rotated clockwise.
When you have just installed your
system, turn this down first before
turning on your subwoofer. This will
prevent any loud surprises.

3. Crossover Frequency

This controls the high frequency cutoff
point. With the control rotated fully
clockwise, the subwoofer will repro-
duce frequencies up to 100 Hz. With
the control fully counter-clockwise the
subwoofer reproduces up to 30 Hz.

Rotate the control until the bass
sounds natural. If the mid-bass sounds
natural but you want more low bass,
turn the crossover frequency down a
little, then turn the volume control up
by about the same amount. This
increases the low-bass output while
leaving the mid-bass output the same.

4. Phase Control

This control changes the relative phase
of the subwoofer with respect to your
other speakers. Use this control to help
blend the subwoofer with the rest of
your system. This is accomplished by
adjusting the control in small incre-
ments as you listen for the most bass
at your listening position. As a final
trim, readjust the crossover and
volume controls after the phase control
has been set.

5. Flat/Video Contour Switch

 When this switch is set to FLAT, the
frequency response extends down to
16 Hz. This is the recommended
setting for most audio and video
applications.

When set to Video Contour

a low

frequency roll-off is introduced
commencing below approximately
30 Hz. This setting may be used if your

Summary of Contents for True Subwoofer Signature

Page 1: ......

Page 2: ...onnected to a power supply only of the type described in these operation instructions or as marked on the Component 9 Power Cord Protection Power supply cords should be routed so that they are not lik...

Page 3: ...igurations 11 Adjusting the controls 15 Specifications 16 Troubleshooting guide 17 Limited warranty 19 Service assistance 19 Contents To find out more about this and other Sunfire products please visi...

Page 4: ...ously variable volume level control Soft clipping circuit allows graceful overload and prevents speaker damage due to clipping Gold plated inputs and outputs Dear Friend Thank you for purchasing my Su...

Page 5: ...hould position the driver with the bump towards a protected side The Amplifier The large movement range of the drivers creates greater air pressure inside the box than a conventional woofer Therefore...

Page 6: ...pro duce frequencies up to 100 Hz With the control fully counter clockwise the subwoofer reproduces up to 30 Hz Rotate the control until the bass sounds natural If the mid bass sounds natural but you...

Page 7: ...r a signal is present at the inputs of the subwoofer The high pass crossover is a passive network with a fixed crossover frequency of 70 Hz and a 6 dB per octave slope We recommend using this high pas...

Page 8: ...g it to adhere solidly to the floor To move the woofer along the floor rotate it onto one edge and it will slide along easier Heat rise Allow adequate ventilation around the metal control panel of the...

Page 9: ...uld be fully shielded and as short as possible for the job The longest cable in your system will likely be to the subwoofer so choose a good quality brand Some patch cords can be a very tight fit and...

Page 10: ...bwoofer s performance Moving the subwoofer from one corner to another can have a major effect on the bass response Remember to keep it at least two or three feet away from any TV screen computer VCR o...

Page 11: ...LFE output can be connected in the same way The subwoofer will play the low frequency range and the other speakers will play the frequency range delivered to them by your amplifier If you have a home...

Page 12: ...R bass The opening scene in Top Gun for example has loads of L R bass information If this is not preserved the bass in these scenes sounds anemic The Sunfire Subwoofer utilizes differential gain on th...

Page 13: ...e subwoofer s fixed high pass crossover point The signals coming out of the subwoofer s high pass outputs are not affected by any of the controls They are just a copy of the signals going in except th...

Page 14: ...ction of your receiver s power is transferred to the subwoofer There is no need to use the Speaker Level inputs if you are using a separate amplifier and preamplifier Such systems are best connected u...

Page 15: ...ill do fine as will the Stereophile test CD Step 1 Disconnect the subwoofer and run the main speaker with a tone in its passband 80 100Hz Measure the level Step 2 Disconnect the main speaker and recon...

Page 16: ...ft input with volume control at 0dB 60 mVrms with volume control fully clockwise 0 75 Vrms from right input with volume control at 0dB 200 mVrms with volume control fully clockwise Input impedance 15...

Page 17: ...r using a remote control or with a small volume knob on the back panel Make sure that this is adjusted correctly Check that your preamplifier or receiver s sub output is turned on Some systems only ha...

Page 18: ...hat they are disconnected where they first enter the room so they are making no connection to your preampli fier TV or any other component If the hum is caused by the cable TV line then you will need...

Page 19: ...y defective product and shall not in any event include property or any other incidental or consequential damages which may result from the failure of this product Some states do not allow limitations...

Page 20: ...Manual part number 913 038 00 Rev A...

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