ProAudio SW28 User manual

SW28
Manual
SW28
Subwoofer

2
Dear user,
first of all we would like to say a big thank you for your decision
and the confidence you were thus placing in us.
On the following pages you will find important information and
technical instructions regarding the correct usage and care of the
loudspeaker.
Pleae read this manual carefully before initial operation and do
observe all safety instructions.
This manual is an essential part of the product. Please keep the
manual in a safe place for future reference to have it at hand,
should any questions or uncertainties arise.
If you pass on the product to a third party, among other things,
you need to make sure that the manual is enclosed with the
product.
In case you might need additional manuals, we ask you to contact
us.
ProAudio Technology GmbH
Hermann-Schwer-Strasse 3
78048 Villingen-Schwenningen
Germany
Phone: [phone] / 99 81 96 - 0
Fax: [phone] / 99 81 96 - 9
[e-mail]
www.proaudio-technology.de
Symbols:
Hazardous
voltage
Caution
danger
Strictly
observe
Information on the manual:
Manual
SW28 Subwoofer Version 1.1 ENG
ProAudio Technology Last update November 2012
Copyright © ProAudio Technology GmbH 2012
Items delivered:
• Subwoofer
• Manual
Contents:
• Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• General Safety and Care Instructions . . . . . . . . . . . . . . . . . 3
• Description and Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
• Operation on System Amplifiers . . . . . . . . . . . . . . . . . . . . . 4
• Operating Modes
[1] SW28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
[2] Mixed Operation SW28 and SW18 . . . . . . . . . . . . . . . . 6
[3] Mixed Operation SW28 and SW18 CSA . . . . . . . . . . . . 8
• Drawings / Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
• Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
• Declaration of Conformity . . . . . . . . . . . . . . . . . 11

SW28
3
General Safety Instructions:
Professional loudspeakers can produce harmful sound pressure
levels. SPLs above 95 dB can permanently damage your hearing.
Observe the relevant guidelines regarding working safety and
health protection.
To avoid physical and personal damages due to loudspeakers
dropping or tumbling over, please make sure that the speakers
stand safely on a firm ground.
Vertically stacked loudspeakers must be secured sufficiently with
tension belts against unintentional movement.
Check all cabinets and accessories regularly for wear, especially
the flying rails and the tripod flange. Replace them if necessary.
Make sure that during operation on spacer tubes, no persons will
stand close to the loudspeakers.
Use only accessory parts specified by ProAudio Technology or
original accessory parts from ProAudio Technology.
Loudspeakers always produce a magnetic field. Make sure
that during transport, setup and disassembly and also during
operation of the loudspeakers no objects (such as laptops,
harddisk drives, credit cards and the likes) get close to the
speakers which could become damaged by the magnetic field.
People who have a pacemaker must keep a safety clearance.
The minimum recommended safety clearance is 1 m.
Do not set up the loudspeakers in places where they are
permanently exposed to moisture, dust, dirt or direct sunlight.
Care:
Wipe the surface of loudspeakers only with a damp cloth and
pure water.
In case of heavy pollution, repeat the above procedure several
times if necessary.
Do not use any chemical additives or aggressive detergents, as
these may harm and damage the surfaces.

4
Note:
Only one 4-pole cable is
required to connect 2-channel
combinations of several SW28
and tops.
Only one 4-pole cable is required
to connect 2-channel sub arrays
like e.g. 2 x 2 SW28.
Description:
The SW28 is a compact 2 x 18“ bassreflex subwoofer for sound
systems with an active frequency crossover.
It can be used for all kinds of sound reinforcement, from stand-
alone applications to massive cardioid subwoofer arrays. Large,
symmetrically positioned bass reflex ports allow a controlled and
loss-free low-end reproduction.
Operation is to be made (exclusively) using the
ProAudio Technology system amplifiers. Two different setups
– omnidirectional (front) and cardioid (front and rear) – enable
a practice-oriented usage. Alternatively you can also use
amplifiers of the Hoellstern DELTA series with built-in DSP. If
you have any questions regarding this issue, please contact
ProAudio Technology.
Cabinet:
The cabinet is made of 15 mm birch multiply wood and coated
with a robust two-component texture paint finish. It is fitted
with eight recessed handles, two M20 steel flanges, two front
lid attachments and eight stacking feet with matching recesses
on the opposite side. Behind the front grille is a layer of black
acoustic foam.
Connection:
The connections are made on the rear side through two Neutrik
NL4 SpeakON sockets wired in parallel.
Pin pair 1 may be used to hook up tops (slave-through option).
Pin pair 2 is connected to the subwoofer chassis.
There are two additional SpeakON connectors on the front side.
Pin pair 1 of the front sockets is connected to the subwoofer
chassis. These connectors have been provided for optionally
tapping off a second channel with sub arrays or cardioid sub
arrays (CSA operation mode). The CSA mode will be explained in
detail on the following pages of this manual.
Combinations of SW28 and tops, which are supplied via a 4-pole
speaker cable, must only be connected at the rear SpeakON
sockets of the SW28 subwoofers!
Never use the SpeakON sockets on the front side.
Operation on System Amplifiers:
The amplifier configuration software will display help texts for the
individual loudspeakers. Select a setup which contains the name
“SW28“. The “CSA“ (Cardioid Sub Array) option must be used for
cardioid applications.
On the DELTA8.4-DSP system amplifier one SW28 can be driven
per channel.
On the DELTA14.4-DSP system amplifier a maximum of two
SW28 can be driven per channel.
Details will be shown by the software upon entering the number
of SW28 subwoofers per channel.
Note:
Use the SW28 subwoofer only
on system amplifiers with the
available setups. Otherwise there
may be a risk of damage and
inadequate performance.

SW28
5
Front
Front
FrontFront
Front Front
DELTA 8.4-DSP / 14.4-DSP – 4 x 1-pc Sub Array [SW28 – 4 CH]
Two SW28 subwoofers on either side are wired using 4-pole speaker cables.
Each subwoofer is driven by one dedicated amplifier channel.
Four amplifier channels will be assigned.
DELTA 14.4-DSP – 2 x 2-pc Sub Array [SW28 - 2 CH]
All four SW28 subwoofers are wired using 4-pole speaker cables. Two
subwoofers on either side are each driven by one dedicated amplifier channel.
Two amplifier channels will be assigned.
DELTA 8.4-DSP / 14.4-DSP [SW28]
Both SW28 subwoofers are wired using 4-pole speaker cables.
Two amplifier channels will be assigned.
DELTA 14.4-DSP [SW28]
Both SW28 subwoofers are wired using 4-pole speaker cables.
One amplifier channel will be assigned. Pin pair 1 may be used for tops.
Operating Modes
[1] SW28:

6
Front Front
FrontFront
Front
DELTA 14.4-DSP – 2 x 3-pc Cardioid Sub Array [SW28-CSA]
All three SW28 subwoofers on either side are wired using 4-pole speaker
cables. The two front-firing subwoofers and the single back-firing subwoofer
are each driven by one dedicated amplifier channel.
Four amplifier channels will be assigned.
14.4-DSP [SW28-CSA]
With ground coupling:
14.4-DSP [SW28-CSA]
Without ground coupling:
14.4-DSP – 1 x 3-pc Cardioid Sub Array [SW28-CSA]
All three SW28 subwoofers are wired using 4-pole speaker cables. The two
front-firing subwoofers and the single back-firing subwoofer are each driven
by one dedicated amplifier channel.
Two amplifier channels will be assigned.

SW28
7
DELTA8.4-DSP / DELTA14.4-DSP SW28
Both subwoofers are wired using 4-pole speaker cables.
On the DELTA8.4-DSP system amplifier two amplifier channels will be
assigned.
On the DELTA14.4-DSP system amplifier one amplifier channel may be
assigned and pin pair 1 is still free for tops.
[2] Mixed operation SW28 and SW18:
Under acoustical, mechanical and visual aspects, the SW28 is fully
compatible to the SW18 subwoofer. Both subwoofers may be combined in
any desired configurations and setup variants. Likewise cardioid sub arrays
(CSA) are possible in a mix mode with SW28 / SW18.
The minimum impedance is 2 ohms on the DELTA14.4-DSP system amplifier
and 4 ohms on the DELTA8.4-DSP system amplifier.
DELTA8.4-DSP / DELTA14.4-DSP SW28
All three subwoofers are wired using 4-pole speaker cables.
On the DELTA8.4-DSP system amplifier two amplifier channels will be
assigned.
On the DELTA14.4-DSP system amplifier one amplifier channel may be
assigned and pin pair 1 is still free for tops.
DELTA8.4-DSP / DELTA14.4-DSP SW28
All three subwoofers are wired using 4-pole speaker cables.
On the DELTA8.4-DSP system amplifier four amplifier channels will be
assigned.
On the DELTA14.4-DSP system amplifier two amplifier channels may be
assigned and pin pair 1 is still free for tops.

8
Front
Rear
Front Rear Front
Front
Rear
[3] Mixed operation SW28 and SW18 CSA:
DELTA8.4-DSP / DELTA14.4-DSP SW28-CSA
Both subwoofers are wired using 4-pole speaker cables.
The front-firing SW28 subwoofer and the back-firing SW18 subwoofer
are each driven by one dedicated amplifier channel.
Two amplifier channels will be assigned.
DELTA14.4-DSP SW28-CSA
All five subwoofers are wired using 4-pole speaker cables.
The four front-firing SW18 subwoofers and the single back-firing SW28
subwoofer are each driven by one dedicated amplifier channel.
Two amplifier channels will be assigned.
DELTA14.4-DSP SW28-CSA
All five subwoofers are wired using 4-pole speaker cables.
The four front-firing SW18 subwoofers and the single back-firing SW28
subwoofer are each driven by one dedicated amplifier channel.
Two amplifier channels will be assigned.
With ground coupling

SW28
9
Front Rear Front Front Rear Front
Front
Rear
Front
DELTA14.4-DSP SW28-CSA
All four subwoofers are wired using 4-pole speaker cables.
The front-firing SW18 and SW28 subwoofers and the single back-firing
SW28 subwoofer are each driven by one dedicated amplifier channel.
Two amplifier channels will be assigned.
DELTA14.4-DSP SW28-CSA
All five subwoofers on either side are wired using 4-pole speaker cables.
The four front-firing SW18 subwoofers and the single back-firing SW28
subwoofer are each driven by one dedicated amplifier channel.
Four amplifier channels will be assigned.
Without ground coupling

10
DELTA 14.4-DSP – 2 x 3 Cardioid sub array [SW28-CSA]
All six SW28 subwoofers are connected via a 4-pole loudspeaker cable.
The four front-firing subwoofers and the two back-firing sub are each
driven by one amplifier channel. Two amplifier channels are assigned.
DELTA 8.4-DSP / 14.4-DSP
[SW28-CSA]
With ground coupling:
DELTA 8.4-DSP / 14.4-DSP
[SW28-CSA]
Without ground coupling:
Drawings / Dimensions:
585585585 605
1165
605

SW28
11
Technical Specifications:
Drivers 2 x 18” neodymium chassis
Power handling (RMS / programme) 2,000 W / 4,000 W
Impedance 4 ohms
Frequency response 36 – 100 Hz (via system amplifier)
Max. SPL (1 m, free field) 136 dB peak (via system amplifier)
Connections SpeakON sockets:
• 2 x rear: chassis PIN 2+ / 2– and PIN 1+ / 1– parallel
• 2 x front: chassis PIN 1+ / 1– and PIN 2+ / 2– parallel
Rear pin assignment:
• PIN 1+ / 1– : optional tap for tops
• PIN 2+ / 2– : 2 x 18“ chassis
Front pin assignment:
• PIN 1+ / 1– : 2 x 18“ chassis
• PIN 2+ / 2– : optional for additional subs
Dimensions (H x W x D) 585 x 1165 x 605 mm / 23” x 45.9” x 23.8”
Weight 70 kg / 154.3 lbs
Colour black
Accessories • LID-SW28 Front lid w/o wheels
• COV1-SW28 Protective cover for a single SW28 on wheels
• DOL2-SW28 Alu dolly for two SW28,
ready-made for outrigger
• OUTR4 Toolfree adjustable outrigger kit for
DOL2-SW18 / DOL2-SW28
• DOL-SW1828 Dolly for two SW28
• COV-SW1828 Protective cover for SW18 / SW28
in combination with DOL-SW1828
• DSK Spacer tube w. crank
• DELTA 8.4-DSP System amplifier
• DELTA 14.4-DSP System amplifier
• System patchbay
• System rack
Options • Installation version w/o handles, rubber feet and attachments
• Paint finish in RAL colours
Disposal:
The disposal of electric and electronic appliances must be done
independently from domestic waste or public collecting points. The
relevant regulations must be observed and adhered to.
EU Conformity Declaration:
This declaration is valid for the SW28 loudspeaker of the
manufacturing company ProAudio Technology GmbH.
Included herein are all production items of the same type, as long
as they have not been modified subsequently in structural or
electromechanical respect.
It is herewith confirmed that the mentioned products comply with
the protection requirements of the relevant EU directives.
If you have any questions, we kindly ask you to get in touch with
ProAudio Technology.

SW28
ProAudio Technology GmbH
Hermann-Schwer-Strasse 3
78048 Villingen-Schwenningen
Germany
Phone: [phone] / 99 81 96 - 0
Fax: [phone] / 99 81 96 - 9
[e-mail]
www.proaudio-technology.de
Manual SW28 Subwoofer – 2012-11 ENG