background image

Line-level connection

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––——
Figure 1 shows connection to a pre-amplifier's main outputs and returning them to your
amplifier inputs.

When installed in this fashion, your satellite speakers will be crossed over at 80/100Hz
which removes the lower bass from your amplifier and speakers, enabling them to do a
better  job  reproducing  high  frequencies.  By  utilizing  this  method,  you  will  have  a  bi-
amplified system, gaining improved power and headroom for your system.

THX Ultra 2 Operation:

On  the  back  panel  of  the  subwoofer  select  the  THX  Subwoofer  volume  level  and  the
Subsonic, X-Over, and High-Pass Crossover THX settings.

6

7

Subwoofer outputs

The Velodyne subwoofer is designed to operate using the full range audio signal for input
when using the built-in crossover. Some processors/receivers, have a "subwoofer out" jack
that is internally filtered and designed to be used with a conventional amplifier and speaker.
In some rare cases, combining both an external crossover and the one internal to the
subwoofer may result in low output and increased noise. In these installations you may
need to bypass the internal crossover in either the processor or Velodyne subwoofer. In
some installations, simply setting one crossover to a higher frequency (such as 120 Hz) will
restore maximum performance. To bypass the subwoofer's internal crossover when the
unit is being fed a low pass signal from another crossover, simply locate the switch marked

X-over, OUT - IN

 on the rear panel of the subwoofer and set to the 

OUT

 position. This

will eliminate the internal crossover from the signal path. 

 Note: If not using an external

crossover, you should use the built-in crossover for optimal performance.

Figure 1: Installation using line-level inputs

AMPLIFIER

MAIN OUTPUTS

RIGHT       LEFT

TO SATELLITE SPEAKERS

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

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION

RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

AVIS:

ULTRA-EFFICIENT  CLASS D AMP

380 oz. MOTOR STRUCTURE

VIDEO SHIELDED

PATENTED HIGH GAIN SERVO

1250 WATTS RMS/3000PEAK

TANDEM 3” PUSH-PULL MOTORS

HIGH-GAIN

SERVO


RIGHT

SPEAKER LEVEL

OUTPUT

INPUT

LEFT

SPEAKER LEVEL

OUTPUT

INPUT

INPUT

OUTPUT

LINE LEVEL

LOW-PASS

CROSSOVER

80 Hz

120 Hz

40 Hz

BALANCED

INPUT(RIGHT)

PHASE

POWER

X-OVER

SUBSONIC

Serial # Label

VELODYNE ACOUSTICS, INC.

WARNING: TO REDUCE THE RISK OF

FIRE OR ELECTRIC SHOCK DO NOT EXPOSE

THIS APPLIANCE TO RAIN OR MOISTURE

SUBWOOFER

VOLUME

MIN

MAX

15Hz - 35Hz

OUT - IN

AUTO - ON

°

 - 180 

°

100 Hz

HIGH-PASS

CROSSOVER

80 Hz

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

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION

RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

AVIS:

ULTRA-EFFICIENT  CLASS D AMP

380 oz. MOTOR STRUCTURE

VIDEO SHIELDED

PATENTED HIGH GAIN SERVO

1250 WATTS RMS/3000PEAK

TANDEM 3” PUSH-PULL MOTORS

HIGH-GAIN

SERVO


RIGHT

SPEAKER LEVEL

OUTPUT

INPUT

LEFT

SPEAKER LEVEL

OUTPUT

INPUT

INPUT

OUTPUT

LINE LEVEL

LOW-PASS

CROSSOVER

80 Hz

120 Hz

40 Hz

BALANCED

INPUT(RIGHT)

PHASE

POWER

X-OVER

SUBSONIC

Serial # Label

VELODYNE ACOUSTICS, INC.

WARNING: TO REDUCE THE RISK OF

FIRE OR ELECTRIC SHOCK DO NOT EXPOSE

THIS APPLIANCE TO RAIN OR MOISTURE

SUBWOOFER

VOLUME

MIN

MAX

15Hz - 35Hz

OUT - IN

AUTO - ON

°

 - 180 

°

100 Hz

HIGH-PASS

CROSSOVER

80 Hz

Summary of Contents for HGS-15 THX ULTRA 2 - REV B

Page 1: ...oofer 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 Velody...

Page 2: ...situated on a bed sofa rug or similar surface that may block theventilationopenings orplacedinabuilt ininstallationsuchasabookcaseorcabinetthatmayimpede the flow of air through the ventilation opening...

Page 3: ...nicht in einem Regal oder Schrank unterbringen worin die Luftzufuhr behindert wird 9 W rme Subwoofer nicht in der N he von W rmequellen wie Heizk rpern W rmespeichern fen oder anderen w rmeerzeugende...

Page 4: ...upports recommand s 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 impo...

Page 5: ...elerometercontinuouslymonitors conemotions providinguswithafeedbacksignalfortheservocontrolcircuitry Thishigh gainsystemisdesignedtoimprovelinearityandreducedistortionapproximately30times over convent...

Page 6: ...thin 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...

Page 7: ...fined 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 w...

Page 8: ...g the switch in the on position 9 responseandoutputlevelcanbe drastically influencedbyplacement dependingonthe acousticpropertiesofthelisteningroom Typically theoptimumlocationforasubwoofer istuckedaw...

Page 9: ...esuggestsettingtheautoturnonswitchtotheon position Thisdeactivates the sensing circuitry allowing the remote to have total control of unit power NOTE Two AAA batteries are required included for operat...

Page 10: ...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 SA...

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