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External remote jack

This  connection  allows  an  auxiliary  infrared  remote  receiver  "eye"  to  be  installed  and
placed where most convenient. This option is usually only required when the subwoofer
is to be part of a custom installation in which the built in "eye" (located adjacent to the
speaker on the front baffle) will be hidden in a location where it can not adequately receive
signals from the remote.

High pass crossover switch- 80Hz (THX)/100Hz

This switch selects the frequency for the high pass crossover outputs. This crossover is
functional  on  both  line  and  speaker-level  outputs.  Smaller  speakers  with  limited  low
frequency ability may prefer the higher 100Hz setting which will reduce the low frequencies
sent to them. Larger speakers with greater low frequency output may be able to handle the
80Hz setting without strain.

Power switch

The master power switch is located on the right half of the unit. This rocker style switch is
the main on/off for the unit. This switch should be set to position 

1 (up) for on

, and 

0

(down) for off

. If the unit is to be left unused for an extended period of time, the master

power switch should be turned off.

Detachable power cord

Allows for easy replacement should the original be damaged.

Infrared remote control

The remote control unit supplied with your subwoofer allows for convenient adjustment
of select subwoofer functions. The power button turns the unit on/off. The /-
buttons on the remote allow you to increase or decrease the output volume of the unit
relative to the setting of the main volume control on the rear panel. The middle reset button
returns the remote volume control to neutral, output level will then be determined  by the
manual volume control setting. Initial setup of the unit should be performed with the
remote volume at neutral, while you adjust the manual volume knob to match playback
levels. The mute button silences the unit. If you choose to utilize the remote to turn the
unit on/off, we suggest setting the auto turn on switch to the 

on 

position. This deactivates

the sensing circuitry allowing the remote to have total control of unit power.
NOTE: Two  AAA batteries are required & included for operation.  If the remote control
operating range deteriorates, please check batteries for deterioration. Do not leave remote
placed on heat generating items, such as amplifiers.

5

8

Speaker-level connection

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Figure 2 shows an easy way to connect your Velodyne subwoofer directly to your receiver
or integrated amplifier.  When connected in this fashion, your satellite speakers will be
crossed over at 80/100Hz, which removes the lower bass from your speakers, enabling
them to do a better job reproducing high frequencies. You may also connect your satellites
directly to your receiver or amplifier along with the subwoofer if you wish to bypass the
internal high-pass crossover.

Caution!!!    To  avoid  damage  to  your  main  amplifier,  be  sure  to  maintain
correct polarity when making all connections. Red (positive) to red, and black
(negative) to black. Be sure that all connections are tight, and that there are

no loose strands or frayed wires.

Interconnect cables

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
When installing your new Velodyne subwoofer using the line level connections, you should
always use shielded phono cables. There are many decent cables available today, most any
of which will work perfectly well. We do recommend that you keep the length of cable as
short as possible to avoid any potential noise problems.

When using speaker level connections, use a decent quality speaker cable that mates well
with the connectors. Be very careful to avoid any loose strands or frayed wires which may
result in a short, which may damage your equipment. Cables of extremely large size are
typically not required. Extremely large gauge wire may not properly fit in the binding posts,
resulting in a poor connection and possible short circuits.

Placement

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
True subwoofers operate at extremely low frequencies which are primarily non-directional.
While it is recommended that the subwoofer be placed on the same plane as the satellite
speakers, room and system conditions often dictate otherwise. Keep in mind that frequency

continued. . .

Summary of Contents for HGS-15 THX, HGS-18 THX

Page 1: ...woofer System Printed on recycled paper If you know subwoofers you know about Velodyne Corey Greenberg Home Theater Technology February 1995 Face Off Comparison of five subwoofers In general the Velodyne could play slightly louder and often cleaner than the Sunfire D B Keele Jr Audio June 1998 How do they get this kind of bass out of such a tiny box Deep tight tuneful and loud enough to rattle pic...

Page 2: ... situated on a bed sofa rug or similar surface that may block theventilationopenings orplacedinabuilt ininstallationsuchasabookcaseorcabinetthatmayimpede the flow of air through the ventilation openings 9 Heat The subwoofer should be situated away from heat sources such as radiators heat registers stoves or other subwoofers that produce heat 10 Power Sources The subwoofer should be connected to a ...

Page 3: ...icht in einem Regal oder Schrank unterbringen worin die Luftzufuhr behindert wird 9 Wärme Subwoofer nicht in der Nähe von Wärmequellen wie Heizkörpern Wärmespeichern Öfen oder anderen wärmeerzeugenden Subwoofern aufstellen 10 Netzanschluß Subwoofer nur an eine der in der Bedienungsanleitung beschriebenen oder auf dem Subwoofer angegebenen Stromquellen anschließen 11 Netzkabelschutz Netzkabel so ve...

Page 4: ...mmandés par le fabricant 7 Assemblage mural ou au plafond Se conformer uniquement aux instructions du fabricant pour fixer l enceinte sur un mur ou sur un plafond 8 Ventilation Il est important de placer l enceinte de telle sorte qu elle ne gêne pas sa propre ventilation Par exemple ne pas placer l enceinte sur un lit un canapé sur la moquette ou sur toute surface similaire qui bloque les ouvertur...

Page 5: ...celerometercontinuouslymonitors conemotions providinguswithafeedbacksignalfortheservocontrolcircuitry Thishigh gainsystemisdesignedtoimprovelinearityandreducedistortionapproximately30times over conventional non servo systems While the input signal is being sent to the amplifier which powers the driver a continuous signal representing cone motion is being sent to a comparator circuit This circuit c...

Page 6: ...ithin two magnetic gaps suspended by dual spiders for even greater linearity We designed this motor to produce over one inch 1 1 8 to be exact of linear motion with a maximum mechanical limit of 2 Also with this unique configuration the distortion products are reduced by a factor of two over conventional single coil structures with dramatically improved cone control This driver alone would result ...

Page 7: ...efined as any form of distortion that moves energy from one portion of the audio frequency spectrum to another When a single tone is applied to a nonlinear system the result is harmonic distortion In which some of the energy leaves the system at multiples of the original frequency Whenmultipletonesareapplied intermodulationtonesareproduced usually as simple combinations of the input frequencies Ge...

Page 8: ...ng the switch in the on position 9 responseandoutputlevelcanbe drastically influencedbyplacement dependingonthe acousticpropertiesofthelisteningroom Typically theoptimumlocationforasubwoofer istuckedawayinacornerofyourlisteningroom Thislocationwillusuallyofferthegreatest output levels and optimum low frequency extension The worst location for a subwoofer it typically far away from any walls and cl...

Page 9: ...wesuggestsettingtheautoturnonswitchtotheon position Thisdeactivates the sensing circuitry allowing the remote to have total control of unit power NOTE Two AAA batteries are required included for operation If the remote control operatingrangedeteriorates pleasecheckbatteriesfordeterioration Donotleaveremote placed on heat generating items such as amplifiers 5 8 Speaker level connection Figure 2 sho...

Page 10: ...s AMPLIFIER MAIN OUTPUTS RIGHT LEFT TOSATELLITESPEAKERS PRE AMP MAIN OUTPUTS MAIN INPUTS LEFT RIGHT RIGHT LEFT Figure 2 Installation using speaker level from amplifier inputs INTEGRATED AMP RECEIVER SATELLITE SPEAKERS MAIN OUTPUTS speaker level BALANCED INPUT LEFT COVERED UNDER ONE OR MORE OF THE FOLLOWING U S PATENTS 4 727 584 4 573 189 OTHER PATENTS PENDING 117 V 60 Hz 10A POWER EXTERNAL REMOTE ...

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