HEDD BASS 08 Manuel utilisateur
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Table of Contents
Introduction and Quickstart
Box Contents
Product Overview
Status LED
CoP: Closed or Ported
HEDD Lineariser®
Control Settings
Safety Instructions
Warranty
Troubleshooting
Technical Specications
A Brief History of Time
3
4
5
7
8
9
11
15
17
18
19
20
© 2021 HEDD Audio GmbH | Heinz Electrodynamic Designs | www.hedd.audio
Introduction & Unpacking
Thanks a lot for choosing HEDD BASS subwoofer
All BASS subwoofer models have an identical backplate so this Manual works for all of them.
The BASS subwoofers monitors oer detailed and partly new kinds of controls, so we invite you to
read through the following sections carefully.
Please unpack your new loudspeaker carefully. If you discover any damage to the packaging or the
speaker itself, don’t operate the speaker and contact your HEDD dealer for solving the problem.
We suggest that you allow the speaker to acclimate to the temperature of your room for about an
hour before using it.
Quick Start
• Make sure the main power switch is in the “0” position, then connect the power cord to the power-
socket.
• Set the power switch to “1”
• Connect your audio source via the balanced XLR or the AES in socket, then select the desired input
with the ANALOG / AES rotary switch.
As there are quite a number of control knobs on the backplate we recommend to start playing music
with all markers in the “Up” position: ALL "0" and "
↑
" POSITION = FACTORY SETTING
Enjoy the music.
PS: Please save the original box as it provides the safest way for a future transportation of your
speaker.
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Box Contents
The complete set includes:
• one active subwoofer HEDD BASS 08 or BASS 12
• one power cable compatible with the region from where it was sold
• quickstart guide
• «CoP» leaet explaining the proper switch from Ported to Closed Mode
• «CoP» screw and plugs to seal the bass reex ports
Please make sure your box contents match our listing.
QUICKSTART
BASS Subwoofer
How to switch between Closed and Ported
© 2021 HEDD Audio GmbH | Heinz Electrodynamic Designs | www.hedd.audio
Product Overview
Congratulations on purchasing the HEDD BASS 08 or BASS 12. You have acquired very
precise subwoofer with a rich feature set. The main features are exchangable use as a Closed
or Ported system, as well as the integration of the on-board HEDD Lineariser®. Please head
to the specic section to nd out more.
As active subwoofers, the BASS subwoofers have an integrated amplier. You can connect
them with a digital interface or analog pre-amplier. Please refer to the section Getting
Started or Positioning to nd out more.
Due to their similar nature, this operation manual equally covers the HEDD BASS 08 and
HEDD BASS 12 subwoofers. This manual uses illustrations of the dierent variants, which
thus might not match your exact version in terms of appearance.
Front View
HEDD Honeycomb Woofer
size 8’’ or 12’’ respectively
Front-facing Bass Reex Port
can be used ported or closed
with included plugs
Status LED
please refer to section Status LED to correctly read the signal
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ANALOG INP TS
O TP TS TO SATELLITES
VOL. [dB] LINEARISER®CoP
-1
-2 +2
+1
0
60
40 200
100
120*
80
*FOR LFE
EXTEND.
(less SPL)
NORMAL
+10 dB FOR LFE
MONO LEFT
ANALOG
RIGHT
-4 +4
0
-10
-90-270
0
-180
-6
-12 +12
+6
0 ON
OFF
(*)
Ported
Closed
SAT. OFFSET [m] X-OVER [HZ] LF RANGE
ANALOG/AES INP. SENS. [dB] PHASE [°]
ALL "0" and "↑" POSITION = FACTORYSETTING
!
RISK OF
ELECTRIC SHOCK
DO NOT OPEN
MADE IN GERMANY - www.hedd.audio
SUBWOOFER
This loudspeaker is capable of delivering sound
pressure levels in escess of 85 dB(A), which may
cause permanent hearing damage.
Do not expose this appliance to moisture or rain.
Refer to qualied personnelfor servicing.
CAUTION
CAUTION
I
O
AES IN LEFT RIGHT
AES THROUGH LEFT RIGHT
1
3
2
PUSH
1
3
2
PUSH
1
3
2
PUSH
85V - 264V 50Hz/60Hz
factory use only
BASS Control Board
used for adjusting the various settings
please see section Control Settings
Rear View
In- & Output Connections
XLR analog & AES digital input
XLR analog output & AES passthrough
Power Switch
integrated universal mains, compatible with 85V - 264V at 50/60 Hz
appropriate power cable supplied
© 2021 HEDD Audio GmbH | Heinz Electrodynamic Designs | www.hedd.audio
Status LED
The front LED panel of the subwoofer will indicate its operational status as follows:
The monitors automatically jump into stand-by after 30 minutes. They wake back up when
audio is played.
Subwoofer placement
Only recommendations can be given here as the interaction between a subwoofer and the
rooom modes (that are responsible for the standing waves that may occur) are complex and
not predictable:
• Avoid placing subwoofers near walls.
• Denitively avoid subwoofers in corners.
• Try to watch a minimum distance of 50 cm between subwoofers and adjacent walls.
Green Light
power on
Red Light
overload: please decrease the input sensitivity
White Light
stand-by
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«CoP» Closed or Ported
The HEDD Type 20 MK2 and Type 30 MK2 can be used in either closed or in ported
mode. These are two fundamentally dierent systems that are available for the user to
compare and choose. There is no denite better between the two systems. We
recommend to compare carefully to nd the optimal option for your environment and
listening habits.
Switching Between Closed and Ported
By default, the HEDD speakers are "ported." This means that the bass port is open. To
switch to "closed" mode, please follow the steps below.
1. Insert the included HEDD plugs with help of the HEDD screw to close the ports.
Make sure that the screw is facing outwards!
Push the plugs deep into the bass ports. Make sure that you
can still reach the screw comfortable with your ngers to
pull it out. The plug should not go deeper than when the
bass port starts to bend and the resistance increases. Once
inserted, feel free to unwind and remove the screw.
2. Switch the knob on the backpanel of your monitors to Closed mode.
Please note that the headroom in Closed Mode is limited compared to Ported Mode.
We highly recommend to lower the volume before switching.
from Closed to Ported
To switch back to Ported Mode, stop the audio
playback, wind the screw back into the plug, gently
pull the plug back out again and change the rotary
switch on the backpanel to Ported.
!
!
© 2021 HEDD Audio GmbH | Heinz Electrodynamic Designs | www.hedd.audio
Ported Mode
This is the default operating mode. The bass reex ports are open and allow for a powerful
low-end reproduction. This operation mode allows for a higher eciency and while
maintaining access to lower bass regions.
Closed Mode
In closed mode the HEDD BASS subwoofer functions as an innite bae speaker. This
results in a cleaner sound and increased resolution. However, a 6-10 dB reduction in
maximum sound pressure level (depending on the audio material) for low frequencies is
the consequence.
CoP
Ported
Closed
CoP
Ported
Closed
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HEDD Lineariser®
Due to the physically given relationship between time and frequency, expressed in the
groundtaking harmonic analysis or Fourier transform, dierent tones have slightly
dierent travelling times through loudspeakers. This is true for both active or passive
speakers. Broadly speaking, lower frequencies need more time to pass through than
midrange frequencies, and these are slower than the high tones.
Our HEDD Lineariser® oers a complex phase-correction of your HEDD sat-sub
system. It solves one of the most challenging problems in loudspeaker designs, e.g. the
natural occurance of phase dierence during multi-component sound reproduction.
With the on-board Lineariser®, our monitors and subwoofers are always “right in time”.
The phase-linearisation will improve transients and imaging. To be noted: the correction
necessarily will introduce a latency of around 30 ms. To avoid the delay that might aect
live recordings or instrument playing the HEDD Lineariser® can be switched o.
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1
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