Exposure XXVIII Instruction manual

Before you start
Contents:
Please note that your Exposure Dual Mono
Power Amplifier XXVIII may take up to 48
hours to “run-in” before reaching its optimal
performance. Each subsequent “run-in” will
then take about 20 minutes.
Ensure that the unit is switched off and the
volume control on the system’s integrated
amp or pre-amp is set at its minimum.
Exposure Dual Mono Power Amplifier XXVIII
Mains cable
1Installation
3Loudspeaker Connection
4Operation
a) Connect the mains
cable to the IEC
mains input socket.
b) Connect to the mains
outlet on the wall.
DO NOT switch on
until all input and
output connections
are made.
2Pre-Amp/Integrated Amp Connection
Your Exposure Dual Mono Power Amplifier XXVIII Amplifier is equipped with a stereo pair of
high level RCA phono sockets.
a)Connect the left and right loudspeakers to the corresponding left and right speaker
outputs of your Exposure Dual Mono Power Amplifier XXVIII.
b)Connect the (+) terminal of the loudspeaker to the (+) terminal of the power amp.
c) Connect the (-) terminal of the loudspeaker to the (-) terminal of the power amp.
The Exposure Dual Mono Power Amplifier XXVIII: Back View
Thank you for buying the Exposure Dual Mono Power
Amplifier XXVIII, designed to deliver optimal
performance to enhance your musical enjoyment.
The Exposure Dual Mono Power Amplifier XXVIII: Front View a)Turn amplifier volume control to
minimum.
b)Connect the mains plug to the
mains wall socket.
c) Press power switch of
pre-amplifier.
d)Press power switch of power
amplifier. The LED power indicator
will light up.
e)Without playing any CD/Tape/Disc,
turn the volume control knob slowly
clockwise to around 30%. You
should only hear a faint hiss.
For details on bi-wiring and/or bi-amping of loudspeakers,
please refer to the Extended Set-up section overleaf.
If your Exposure Dual Mono Power Amplifier XXVIII Amplifier is used
with a matching Exposure XXIII Pre-Amplifier:
a)Connect cables from XLR sockets to the PRE-OUT sockets of
the pre-amp.
b)Ensure left and right channels are connected correctly.
If your Exposure Dual Mono Power Amplifier XXVIII Amplifier is used
with an integrated amp:
a)Connect cables from RCA Phono inputs of power amp to the
PRE-OUT sockets of pre-amp/integrated amp.
b)Ensure left and right channels are connected correctly.
(Right channel is marked in red)
Left
Rear of Exposure XXVIII Dual Mono Power Amplifier
Right
Right Speaker Left Speaker
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Exposure Dual Mono Power Amplifier XXVIII: Extended Set-up
Bi-wiring of Loudspeakers
The Exposure Dual Mono Power Amplifier XXVIII is fitted with two sets of 4mm sockets for bi-wired connection
to loudspeakers.
Bi-wiring may provide a useful gain in subjective performance. Please refer to the manufacturer of your
loudspeakers for advice on the practicality and potential benefits of bi-wiring.
Loudspeaker Compatibility
Although the Exposure Dual Mono Power Amplifier XXVIII is able to drive almost any loudspeaker system, the
best results will most likely be achieved with speakers rated at 8 Ohms.
Speaker Cable Compatibility
While the Exposure Dual Mono Power Amplifier XXVIII is compatible with most types of loudspeaker cables
(except for low inductance types), the type of cable used can influence the sonic performance of your system.
Please ask your Exposure dealer for advice on loudspeaker cable compatibility and how to get the best from
your Exposure Dual Mono Power Amplifier XXVIII.
Note: The Exposure Dual Mono Power Amplifier XXVIII is internally protected against damage from short
circuits. However, no such protection is infallible, and damage may occur if positive and negative speaker
cables are inadvertently connected together.
Bi-amping of Loudspeakers
Bi-amping of loudspeakers provides a useful gain in subjective performance. A pre-amplifier, like the Exposure
Pre-amplifier XXIII and two units of Exposure Dual Mono Power Amplifier XXVIII are required for bi-amping of
suitable loudspeakers through its split crossover.
Please check your loudspeaker’s user manual for wiring connections. Your dealer or local distributor will be
able to offer further advice.
Safety
Incorrect installation or inappropriate use of the Exposure
Dual Mono Power Amplifier XXVIII may result in injury due
to electric shock.
•Ensure that the voltage rating on the rear panel of this
unit matches that of your local mains supply. *
•Ensure that the mains cable and plug supplied with this
unit is also correct. (Contact your dealer immediately if
this is not the case)
•This unit is protected by a mains fuse, which is
accessible as part of the IEC socket on the rear panel.
•Fuse replacement specifications:
220/240V units T3.15A fuse
110/120V units T6.3A fuse
•Protect unit against all forms of liquid. Never expose unit
to dripping or splashing, or place objects filled with
water, such as vases, on the unit.
•Unplug unit from mains when not in use for prolonged
periods.
•Do not open this unit – there are NO user serviceable
parts inside.
•Reduce the volume control on the system’s integrated or
pre amp to minimum before turning this unit on or off.
The Exposure Dual Mono Power Amplifier XXVIII may
generate a faint “thump” or “whistle” from the
loudspeakers when switching on or off. This is normal
and does not indicate any cause for concern.
•Ensure that this unit is switched off when connecting or
disconnecting speaker and interconnect cables.
*Contact Exposure Electronics for advice on moving your
equipment to another country or territory.
Caution
For a long and trouble-free life of your Exposure Dual Mono
Power Amplifier XXVIII, please ensure the following:
•Do not short circuit the speaker terminals.
•Do not remove the cover of the Power Amplifier or
dismantle the case.
•Protect unit against all forms of liquid. Never expose unit
to dripping or splashing, or place objects filled with
water, such as vases, on the unit.
•Do not operate the Power Amplifier in a damp
environment or allow liquids to enter the unit.
•Do not attempt to bypass the mains fuse or replace the
fuse with one of a different specification.
•Do not place the Power Amplifier in a position which
restricts cooling airflow around its case.
•Do not use abrasive or solvent-based cleaning fluids on
the Power Amplifier’s case.
Failure to observe these precautionary measures may void
your warranty.
Technical Specifications
Exposure Warranty Policy
Power Output (Stereo): 70 Watts per channel, 8 Ohms.
Input Impedance: 18K ohms @ 1 KHz
Frequency Response: -3dB @ 3Hz and 62KHz, ref 1 KHz
Total Harmonic Distortion:<0.02% at rated power, 1 KHz
Signal to Noise Ratio: >110 dB A weighted,
ref rated output
Channel Separation: >70dB, 20Hz – 20KHz
(typically > 95dB @ 1KHz)
Mains Supply: 110/120V or 220/240V, 50/60Hz
(factory set)
Power Consumption: <350VA 8 Ohms load both
channels driven
Dimensions (H x W x D): 115mm x 440mm x 300mm
Nett Weight (unpacked): 11 kg
Gross Weight (Packed): 13 kg
Right
Input Left Input
Left
Rear of Exposure XXVIII Dual Mono Power Amplifier
Right
SPK 1 SPK 2 SPK 1 SPK 2
Right
Input Left Input
Left
Rear of Exposure XXVIII Dual Mono Power Amplifier
Rear of Exposure XXIII Preamplifier
Right
Pre Out
Right Speaker
High Frequency
Low Frequency
High Frequency
Low Frequency
Left Speaker
SPK 1 SPK 2
2
L
R
1
SPK 1
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SPK 2
1. The Exposure warranty entitles you to FREE repair of this
unit for the first three (3) years from the date of purchase.
2. This warranty is valid only if the unit is purchased from
an authorised Exposure dealer, registered with the
authorised agent in your country of residence and issued
with a recognised warranty card.
3. The agent accepts no responsibility for defects arising
from accident, misuse, abuse, wear and tear, neglect or
through unauthorised adjustment and/or repair or
replacement of any components, nor will they accept
responsibility for damage or loss occurring during transit to
or from the person making a claim under the warranty.
4. The Exposure warranty covers:
• Parts and labour costs for three (3) years from the date
of purchase. Please retain your original receipt as proof of
purchase and purchase date. The guarantee is extended
only to the original purchaser and is not transferable.
When making claims under this warranty:
1. The equipment should be suitably packed and returned
to the dealer from whom it was purchased, or directly to
the local distributor, together with proof of purchase or a
copy of the dated sales receipt.
2. If necessary the unit should be sent carriage pre-paid by
a reputable carrier – NOT by post.
3. No responsibility is accepted for the unit whilst in transit
to the dealer or agent, and customers are advised to insure
the unit against loss or damage whilst in transit.
4. The warranty card MUST be produced when making
claims against this guarantee.
5. Any tampering or alteration made to the warranty card
or to the serial number on the equipment will invalidate the
warranty.
6. The dealer or the agent shall notify the customer when
the repairs have been completed. The customer must claim
the goods within fourteen days from the date of notice,
failing which, the Company reserves the right to impose
storage charges.
7. The Company reserves the right to dispose of the
equipment after 90 days from the date of notice in a
manner that it sees fit and without compensation to the
customer.