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Utility Link terminal Input/Output

If two Dynaudio subwoofers are to be used, they may be connected via the Utility Link. With
this link a total of six input terminals is possible. This feature is intended for use with a multi-
channel surround sound system.

In discreet surround sound systems such as AC-3, MPEG- 2, and DTS, all 5 channels can be
full range. With the Dynaudio Utility Link, the two subwoofers sum all these channels into
one mono subwoofer channel, reproduced by the two subwoofers.

Connect the two subwoofers via the <UTILITY In/Out>.

Connect all outputs from the surround sound system to <IN Mono>, <IN R> and <IN L> on
both subwoofers arbitrarily. It is not necessary to  use  all  inputs.  More  on  this  setup  is
mentioned later in the manual.

Standby

The subwoofer has an internal standby function. The standby will be activated when there is
no input signal to the subwoofer for 10 minutes.

When powering on and off, the mute circuit will mute both  the  subwoofer  itself  and  the
output terminals. This ensures that no noise can be heard in the subwoofer and in the main
speakers (if using the outputs).

Due to a very low standby power consumption, the subwoofer power switch may be left on
continuously. If unused for several days, it is recommended to switch off the main power or
disconnect the device from the main outlet.

When using the 80 Hz low frequency cut-off for the main speakers, do not switch off the
power for the subwoofer while the sound system is playing. If this is done, the signal to the
output terminal will be muted. After a few minutes music should become present in the main
speakers, but very attenuated. This is not a fault, but merely a result of signal passing through
the electronics when no power is supplied. If listening  is  desired  while  the  subwoofer  is
switched off, set the output switch to position <Flat>.

Subsonic filter

The subwoofer has an active second order (12 dB/octave below 20 Hz) subsonic  filter  to
prevent rumble, speaker distortion, or overload situations caused by signals that cannot be
heard.

Summary of Contents for Audience SUB-20A

Page 1: ...Audience SUB 20A Audience SUB 30A Owner s Manual and Safety Instructions ...

Page 2: ... All rights reserved No part of this manual may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical or otherwise whatsoever without the prior written permission of DYNAUDIO A S ...

Page 3: ...ety If the provided plug does not fit into the wall outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being stepped on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Unplug this apparatus during lightning storms or when unused for long periods of time Attachments Only use attachments accessori...

Page 4: ...s in excess of 90 dB A Unpacking Every loudspeaker leaving Dynaudio has been carefully and thoroughly inspected and tested When unpacking the subwoofer be sure to check if any physical damage has occurred to the subwoofer due to shipping In case of damage please contact the selling dealer immediately When unpacking the subwoofer verify that the voltage switch is positioned according to the require...

Page 5: ... Input terminal Mono 9 Output switch Output terminal Right and Left 9 Utility Link terminal Input Output 10 Standby 10 Subsonic filter 10 Protection circuit 11 Power switch 11 AC inlet 11 Voltage switch 11 Fuse drawer 11 INSTALLATION 12 Multi channel sound system 13 POSITIONING 14 TROUBLESHOOTING 15 No sound 15 Distorted sound 15 SPECIFICATIONS 16 ...

Page 6: ...hannels may be summed into one mono subwoofer channel The dimensions of the Audience SUB 30A will make it possible to use it as a CTV stand An optional Audience Center speaker fits perfectly on top of the Audience SUB 30A thereby minimizing the space normally taken by a subwoofer in a living room Both subwoofers are selfpowered designs actively amplified The amplifiers power supply can be used wit...

Page 7: ...r frequency 3 Phase 4 Phase switch 5 Output filter switch 6 Output terminal Right and Left 7 Input terminal Right and Left 8 Input terminal Mono 9 Utility IN OUT terminal bi directional 10 Voltage selector switch 11 Fuse drawer 12 Power switch 13 AC inlet ...

Page 8: ...sting the frequency between 60 Hz and 120 Hz allows for the best transition from the subwoofer to the point where the main speakers roll off Phase Phase switch The Audience SUB is equipped with advanced phase adjustment circuit enabling for proper phase alignment with the audio system The phase control knob enables variable phase settings between 0 to 180 or 180 to 360 depending on the slide switc...

Page 9: ...t switch Output terminal Right and Left The output terminals are intended for use when a separate power amplifier or integrated amplifier with separate inputs is available Using this output enables the removal of frequencies below 80 Hz from the main speakers by setting the switch to Lowcut 80 Hz With the output switch in the Flat position the input terminals are connected directly to the output t...

Page 10: ...off the mute circuit will mute both the subwoofer itself and the output terminals This ensures that no noise can be heard in the subwoofer and in the main speakers if using the outputs Due to a very low standby power consumption the subwoofer power switch may be left on continuously If unused for several days it is recommended to switch off the main power or disconnect the device from the main out...

Page 11: ...ct the power supply cord from the subwoofer to this device Otherwise connect it to an AC wall outlet Voltage switch The voltage switch is positioned according to area voltage requirements It has been pre set prior to shipping from the factory CAUTION Do not try to alter the voltage setting as doing so will result in a blown fuse A wrong setting may result in damaged electronics Fuse drawer The mai...

Page 12: ...t the subwoofer input to the PRE OUT terminal on the equipment Fig B Fig B The subwoofer can also be used together with small main speakers as in subwoofer satellite systems When used in a subwoofer satellite system together with a preamplifier and a power amplifier Fig B the signal from the output terminals of the subwoofer should be connected to the amplifier input Using the output terminals on ...

Page 13: ... and the subwoofer channel to the subwoofer s If multiple Dynaudio subwoofers are to be used connect them with the Utility Link Utility In Out Connect the Utility Link between two subwoofers as shown below Example two subwoofers will act as one big subwoofer with a total of six inputs three on each It is very important that all controls and switches are set in the same position on both subwoofers ...

Page 14: ... the right as the drums in an orchestra are usually located at the right rear of the sound stage Do not cover the back plate otherwise the subwoofer amplifier will become too hot and the protection circuit will activate Do not place the subwoofer with the back plate in direct sunlight Since the port is placed on the back side of the subwoofer we recommend a clearance of at least 5 centimeters 2 in...

Page 15: ...er or tuner directly to the subwoofer IN R and IN L Before doing so make sure to turn down the level on the subwoofer When all is connected and the power is turned on slowly turn up the level If the subwoofer is playing with a direct source the fault will most likely be elsewhere in the audio system Distorted sound If the sound from the subwoofer is distorted or if other problems exist please cons...

Page 16: ... D 430 mm 276 mm 455 mm 16 9 10 9 17 9 Weight 14 kilograms 30 8 lbs Power consumption Standby 10 W Max 150 W Audience SUB 30A Frequency response 23 Hz 150 Hz room depending Crossover frequency Variable low pass 60 Hz 120 Hz High pass output 80 Hz 12 dB per octave Sensitivity 50 mV Max amplifier power output 90 W Max SPL 115 dB typical in room Nominal impedance Mono Left Right input 47 K ohms Drive...

Page 17: ......

Page 18: ... Copyright 1997 DYNAUDIO A S Denmark All Rights Reserved Printed in Denmark DYNAUDIO A S Sverigesvej 15 DK 8660 Skanderborg ...

Page 19: ...Fax 45 86 52 31 16 ...

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