REL Acoustics Britannia B1 User manual

USER MANUAL
Britannia™Series
B1
B2
B3
REL Acoustics Limited
North Road, Bridgend Industrial Estate
Bridgend, CF31 3TP
Great Britain
Telephone: [phone]
Fax: [phone]
Web: www.rel.net

REL Acoustics Britannia Range User Manual
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REL Acoustics Britannia Range User Manual
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Contents
CONTENTS ................................................................................................................................................... 3
IMPORTANT SAFEGUARDS ................................................................................................................... 4
WARNING..................................................................................................................................................... 4
WELCOME ................................................................................................................................................... 5
WORLD WIDE WARRANTY.................................................................................................................... 5
SERVICE AFTER WARRANTY.............................................................................................................. 5
DESIGN SAFETY......................................................................................................................................... 6
MAIN FEATURES OF THE REL BRITANNIA B1, B2 AND B3 SUB- BASS SYSTEMS............... 7
CONTROL PANEL...................................................................................................................................... 8
CONTROLS AND CONNECTIONS B1 ................................................................................................... 9
CONTROLS AND CONNECTIONS B2 ................................................................................................. 10
CONTROLS AND CONNECTIONS B3 ................................................................................................. 11
CONNECTING UP..................................................................................................................................... 13
TO CONNECT TO THE POWER AMPLIFIER USING THE UNBALANCED NEUTRIK HIGH LEVEL INPUT..... 13
TO CONNECT TO MONO BLOCK POWER AMPLIFIERS USING THE HIGH LEVEL NEUTRIK
UNBALANCED INPUT ............................................................................................................................ 14
TO CONNECT TO DIFFERENTIAL (BALANCED OUTPUT) POWER AMPLIFIERS USING THE BALANCED
HIGH LEVEL INPUT ..................................................................................................................................... 16
TO CONNECT TO THE AMPLIFIER/PROCESSOR USING THE PHONO TO PHONO LOW LEVEL INTERCONNECT
................................................................................................................................................................... 17
ALTERNATIVE METHOD FOR CONNECTING AT LOW LEVEL FROM PRE AMPLIFIER .................................. 18
TO CONNECT TO A PRE AMPLIFIER WITH LOW LEVEL DIFFERENTIAL (BALANCED) OUTPUTS.................. 19
REL SET-UP MADE SIMPLE ................................................................................................................. 20
REL SET-UP MADE SIMPLER .............................................................................................................. 23
RUNNING IN .............................................................................................................................................. 24
OVERLOAD PROTECTION ................................................................................................................... 24
CARE AND POLISHING.......................................................................................................................... 24
TECHNICAL............................................................................................................................................... 25
POWER SAVING EFFICIENCY............................................................................................................. 26
TECHNICAL SPECIFICATIONS BRITANNIA RANGE B1, B2 AND B3 ...................................... 27

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IMPORTANT SAFEGUARDS
1. Read all of these instructions.
2. Save these instructions for future use.
3. Unplug from the wall socket before cleaning. Do not use liquid cleaners or aerosol
cleaners. Use a damp cloth for cleaning.
4. Do not use near water.
5. Do not place on a stand or table it may fall causing injury to a child or adult, and damage
to the unit.
6. The unit should only be operated from the power source indicated on the panel of the
amplifier.
7. Only use the power cord supplied.
8. Do not allow anything to rest on the power cord. Position the power cord such that it
cannot be walked on.
9. For added protection during a lightening storm, or when not in use for long periods of
time, unplug it from the wall socket.
10. Never spill any kind of liquid on the unit.
11. Do not attempt to service the unit yourself, as removing the amplifier may expose you to
dangerous voltages. Refer all servicing to your dealer.
12. Unplug the unit from the wall socket and refer servicing to your dealer under the following
conditions:
a. When the power cord or plug is damaged.
b. If liquid has been spilled onto the unit.
c. If the unit does not operate properly by following the operating instructions.
d. If the unit has been dropped and damaged.
e. When the unit exhibits a drastic change in performance.
WARNING
These items are extremely heavy. To avoid risk of injury, take care when handling.

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WELCOME
Thank you for buying a REL Britannia range Sub-Bass system. Our Britannia range is
carefully hand built using the finest materials available and is designed for maximum
performance. This manual contains important safety information as well as helpful advice and
should be carefully studied before connecting up.
WARRANTY
This product is warranted to be free of all defects in material and workmanship for three years
from the date of original purchase by the original owner. A purchase receipt or other proof of
original purchase will be required before warranty service is rendered. This warranty is not
transferable and does not apply to any defects caused by negligence, accidents, misuse,
modification, disassembly, or repair by other than the manufacturer, or by other than normal
use for which this product was intended. Within the period of this warranty, Sumiko will repair
or replace at our service center located at 2431 Fifth St., Berkeley, CA 94710 any part proving
defective in material or workmanship. All expenses, except collateral expenses, related to
replacing or repairing a defective part under this warranty will be assumed by Sumiko, except
for the cost of transporting and insuring the product to our above-named service center. The
buyer must notify Sumiko of any defect, malfunction, or nonconformity promptly upon
discovery. Within 30 business days after receiving the defective product from the buyer,
Sumiko will repair or replace the defective part. We neither assume nor authorize any
representative or other person to assume for us any other liability in connection with the sales
or shipment of our products. We reserve the right to make changes or improvements in our
products without incurring any obligation to similarly alter products previously purchased. The
buyer has the right to bring any action at law or equity to resolve disputes concerning or to
enforce the provision of this warranty.
SERVICE AFTER WARRANTY
Please contact your dealer in the first instance before returning any product directly to us.
Should the unit need to be returned for any reason, all shipping costs will be payable by the
customer. Losses or damage caused during transit are the customer's risk.

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DESIGN SAFETY
This apparatus is designed to Class II specification and is double
insulated, therefore it does not require to be grounded.
[Is below true, or should it be cut as indicated?]
This product is CE marked and has been tested to ensure it satisfies all relevant standards.
It satisfies all relevant standards for Conducted Emissions, Radiated Emissions,
Susceptibility and Immunity.
It also complies with the requirements relating to class II construction detailed in clauses 9 &
10 of BS EN 60065 1994
It also satisfies all relevant safety tests for consumer use provided it is used within the
guidelines of this manual.

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Main Features of the Rel Britannia B1, B2 and B3 SUB- BASS SYSTEMS
1. Separate volume controls for both high and low level inputs
2. Critically correct semitone resolution of the filter controls
3. Balanced and unbalanced inputs via high quality sockets
4. Mode switch to control phase and low level filter bypass
5. All components of matching superior quality to achieve both long-life and long-term
consistency of sound quality.
6. All cabinets made from 30 mm thick MDF.
7. Superior wood veneered finishes available for all models.
8. Set-Safe® circuitry ensuring ultimate protection if overloaded.

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Control Panel
The layout of the panel is intended to ensure total ease of use. Both low and high level inputs
can be used concurrently. Individual volume controls for the high and low level inputs ensure
precise individual adjustment for both high-level two channel (stereo) signals and multi-
channel LFE (surround sound) signals.
The mode switch allows both the phase and the filter bypass to be incorporated into one
control. The Line positions route the low level signals through the ABC filter circuits
(crossover controls). In the LFE (Low Frequency Effects) positions the low level signals
bypass this filter. This is to ensure compatibility with multi-channel home theatre surround
sound systems where the bass frequency range is controlled within the software by the
processor’s decoder circuitry. The high level inputs are always routed through the ABC.
The phase can be reversed by 180 degrees by means of this same switch to preserve the
relative phase between your main system and the REL. This acts at both high level and line
level. See table below.
MODE SELECTOR
SOURCE
PHASE
1
LINE
0
2
LFE
0
3
LINE
180 DEG
4
LFE
180 DEG
The two filter controls are to allow coarse and fine control of the filter settings. The coarse
control marked A through D changes the turnover frequency by approximately half an octave
per division. The fine control marked 1 through 6 offers a resolution of approximately one
semitone per division.
The frequencies offered by these two controls are shown in the table below:
ROLLOFF FREQUENCY HERTZ
1
2
3
4
5
6
A
22
23
25
27
28
30
B
32
34
36
38
41
43
C
46
49
53
56
60
64
D
69
73
78
83
89
95
These frequencies are within 1% tolerance and are repeatable between all Britannia range
models.

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CONTROLS AND CONNECTIONS B1
See page 12 for explanation
1 2 3
4
5
6
7
9
8
10
HIGH LEVEL
UNBALANCED INPUT
CE
FUSE 6.3A/T
~ 100-120 VAC 50-60 HZ
300 WATT MOSFET SUB-BASS SPEAKER SYSTEM
PROTECTED BY
MADE IN GREAT BRITAIN
www.rel.net
R
HIGH LEVEL
BALANCED INPUT
Britannia B1
TM
MAX
MIN
MAX
MIN
1
2
3
4
A
B
C
D
1
2
3
5
6
MODE
LO LEVEL
HI LEVEL
COARSE
FINE
LO INPUT
0dB
+12dB
SOURCE
1
2
3
4
LINE
LFE
LINE
LFE
PHASE
0
0
180 deg
180 deg
MODE SELECTOR
ROLLOFF FREQUENCY
A
B
D
1
2
3
4
5
6
HERTZ
22
23
25
27
28
30
32
34
36
38
41
43
C
46
49
53
56
60
64
69
73
78
83
89
95
ROLLOFF
LINE LEVEL
BALANCED INPUT

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CE
FUSE 6.3A/T
~ 100-120 VAC 50-60 HZ
200 WATT MOSFET SUB-BASS SPEAKER SYSTEM
PROTECTED BY
MADE IN GREAT BRITAIN
www.rel.net
R
Britannia B2
TM
MAX
MIN
MAX
MIN
1
2
3
4
A
B
C
D
1
2
3
4
5
6
MODE
LO LEVEL
HI LEVEL
COARSE
FINE
LO INPUT
0dB
+12dB
SOURCE
1
2
3
4
LINE
LFE
LINE
LFE
PHASE
0
0
180 deg
180 deg
MODE SELECTOR
ROLLOFF
HIGH LEVEL
UNBALANCED INPUT
LINE LEVEL
BALANCED INPUT
HIGH LEVEL
BALANCED INPUT
ROLLOFF FREQUENCY
A
B
D
1
2
3
4
5
6
HERTZ
22
23
25
27
28
30
32
34
36
38
41
43
C
46
49
53
56
60
64
69
73
78
83
89
95
CONTROLS AND CONNECTIONS B2
See page 12 for explanation
123
4
5
6
7
8
9
10