Rega Aethos operation manual
AETHOS
World class hi- made in England.
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1 ...............................................................................................................Introduction
2 ...............................................................................Installation and ventilation
2-3 ................................................................................ Rear panel connectivity
2-3 ...................................................................................... Front panel controls
4 .......................................................... Thermal cut-out and DC protection
4 ......................... Operating temperature and short circuit protection
4 .....................................................................................................Remote control
5-7 ....................................................................................................Specications
7-9 ........................................................................................Safety and warranty
AETHOS
Introduction
The Aethos stereo amplier is housed in a brand new
custom designed case. Employing four 160 W 16 Amp output
transistors per channel, this delivers 125 W per channel into
8 Ω. The Aethos is a dual mono design using a custom wound
toroidal transformer and regulated supplies for the sensitive
amplication and driver stages. The pre-amplier stage uses
class-A discrete circuitry throughout. The Aethos is a no
compromise product with one goal, to deliver your music as
faithfully as possible.
World class hi- made in England. | www.rega.co.uk
1
AETHOS
Installation and ventilation
The AETHOS amplier will work well on most surfaces, such as a shelf
or a table, provided there is sufcient air around the heat sinks to
prevent overheating. If using a turntable, avoid magnetic interference
by positioning the amplier as far away from the turntable and phono
amplier as possible. Keep other equipment away from the amplier.
Due to the layout of Rega’s amplier circuit designs, they are virtually
insusceptible to electromagnetic interference, and by virtue of the
case, emit practically no electromagnetic radiation. However, placing
any electronic equipment, such as sensitive phono ampliers close
together may impair the performance of one or both items. Never
stack other hi- components on top of the AETHOS.
WARNING: DO NOT TOUCH HEAT SINKS, THEY CAN BECOME VERY
HOT.
The heat produced by the AETHOS amplier is dispersed via the heat
sinks mounted on either side of the product. Please ensure the side
section is always exposed to allow for sufcient airow resulting in
adequate cooling of the amplier. If the AETHOS is driven at high
volume for a long period, it will become quite warm. This is entirely
acceptable and as long as there is sufcient ventilation, the amplier
will continue to work normally. Never place the amplier on carpets,
rugs or bedding. Do not force objects into the unit’s ventilation
openings.
Rear panel connectivity (continued)
Pre-amp output (6) - The pre-amplier can drive at least 5 power
ampliers, sub bass units etc. The pre-amplier output uses RCA type
(phono) connectors. The output level is 840 mV with the rated line
input level.
Speaker terminals (7 – right and 8 – left) - These are intended for use
with 4-16 Ω speakers. Sustained use into speakers of less than 8 Ω
could make the unit run warmer than normal.
Mains fuse (9) – see back panel for rating – IMPORTANT replace with
same type and rating.
Mains power inlet (10) – Connect to mains supply – IMPORTANT
observe voltage – see product/rating label for details.
Front panel controls
Powering up
Pressing the power switch (11) to the left of the control panel turns
on the amplier. The Rega logo (18) will illuminate red. After several
seconds you may hear a gentle click, indicating that the switch-on
relay has been released and the amplier is ready for use. Always
allow the AETHOS to fully power down (indicated by the power switch
LED extinguishing after 2-3 seconds) before switching on again, so that
the self-test circuitry can complete its reset cycle.
Record selection
The record input is selected by pressing the Record button (12) on the
front panel, or via the remote control.
Rear panel connectivity
Line inputs 1 to 5 (1) – These inputs can be used for a DAC, CD player,
network player, streamer, tuner etc. All inputs (other than the Direct
input) are at standard analogue line level and can be used for any line
level input.
Record input (2) and output (3) - This is a line level input and output
intended for use with a recording device such as a CD/DVD recorder,
MD, cassette & reel-to-reel tape recorder or sound card. Selecting the
Record function on the amplier front panel enables the input. This
input is completely independent to inputs 1-5 and can be used to
monitor the Record function and quality, without affecting the source
being recorded. The output is a Record signal and is the same signal
as selected by the main input selector 1-5 and is not affected by the
volume control.
Record output link (4) - This output is in parallel to the Record output,
and can be used to drive ancillary components like headphone
ampliers etc, when a signal unaffected by the volume control and
selected by the main input selector is required.
Direct input (5) - This input is routed directly to the power amplier
input with no volume control. The intended use is with multi-channel
systems, where the traditional two-channel system is used as the
front speakers. This input can also be used with an external pre-
amplier if so desired. The sensitivity is 840 mV for maximum output.
Power amplier gain = 31.6 dB.
NOTE: The Direct input button is located on the supplied handset
only. The direct LED (16) will light on the front panel when activated.
CAUTION: As this input has no volume control, if a source like a CD
player is connected to this input, the speakers will be driven to their
maximum. This could potentially damage the speakers.
Mute
The mute function (13) mutes both the pre-amplier and power
amplier speaker outputs and can be selected via the front panel or
remote control.
Input selection
The inputs are selected by pressing the Input button (14) on the front
panel. Repeatedly pressing the Input button will cycle through inputs
1-5. The selected input is indicated by the input LED’s 1-5 on the front
panel (16).
Headphone socket
The AETHOS is capable of driving all standard hi- headphones.
The headphone output (15) has been characterized to match most
commonly used headphones (see specications for the output levels).
When a headphone is inserted into the socket, the speakers will
automatically be turned off. However, it is recommended to reduce
the volume of the AETHOS before connecting any headphones to
ensure they are not damaged and prevent any hearing damage.
WARNING: TO PREVENT POSSIBLE HEARING DAMAGE, DO NOT LISTEN
TO HEADPHONES AT HIGH LEVELS FOR LONG PERIODS OF TIME.
Volume control
The volume of the amplier can be adjusted using the volume control
knob (17) on the amplier and via the remote control handset. The
control is motorised and will independently move when the remote
control is used to control the volume.
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World class hi- made in England. | www.rega.co.uk
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