REDGUM Audio 35ENR User manual

REDGUM Audio
Integrated Amplifier
RGi35 / 35ENR
RGi60 / 60ENR
RGi120 / 120ENR
wner’s manual
REDGUM Audio Pty Ltd
401 Belgrave - Gembrook Rd
Emerald, IC, 3782, Australia
Ph: [phone]
Fax: [phone]
redgumaudio.com
ABN 45 093 132 515

Contents
Why REDGUM?..................................................................................1
Unpacking........................................................................................2
Connecting your amplifier to other components.................................
Loudspeakers.............................................................................................3
DVD players, CD players and other components........................................4
External power amplifier.............................................................................5
ecord out..................................................................................................5
How to use your REDGUM amplifier...................................................6
Turning the amplifier on and off.................................................................6
Input source selection................................................................................7
Volume and Balance control.......................................................................8
Achieving the best sound from your system.......................................9
Where to put your speakers.......................................................................9
Your listening room..................................................................................10
Other helpful hints....................................................................................11
Troubleshooting..............................................................................12
Specifications.................................................................................14
Warranty........................................................................................16
Warranty Registration ....................................................................17

Why REDGUM?
The river red gum is Australia’s most widespread and recognised tree,
and it produces a wood that is truly unique. It yields the second
hardest timber in the world, and this strength saw its widespread use in
the railway lines that sprang up to connect the rapidly expanding
colonies of early 20th century Australia. Its resistance to termites also
made it the natural choice for building foundations, and to this day it
continues to support some of our most historic structures.
The river red gum can be found on most river banks in mainland
Australia, where its roots tap into water stored in the sands and its
leaves provide food for the indigenous wildlife. Its presence is
synonymous with the Australian outback, at once a symbol of life
sustaining water and the struggle against a harsh climate. When
conditions turn dry, the red gum will adapt by shedding huge branches
from its trunk in an effort to conserve moisture. As anyone familiar
with camping in the Australian bush will tell you… don’t ever pitch your
tent underneath a red gum tree!
A celebrated part of our culture, it has perhaps been made most
famous through the landscape paintings of Hans Heysen and onald
Bull.
And while red gum wood was in wide use throughout Australia’s
history, it was not until the invention of the carbide saw that it was
possible to cut the wood accurately. And only then could the real
beauty of this unique hardwood be unveiled.
When polished it reveals a deep red lustre, highlighted by an
intertwining and tightly packed grain structure. Fine irregularities add
to this beauty, and it is highly sought after as a decorative wood for
these unique aesthetic properties. No two pieces of red gum will
match exactly, and this is as it should be. Like our products, each
piece is outstanding and unique.
Now that you’ve heard the story of the Australian river red gum, it’s
time to listen to your very own EDGUM. We’ve carefully selected and
lovingly crafted each piece before coupling it to some of the finest
audio engineering that money can buy. The results? Stunning! Trust
us, you won’t believe your ears.

Unpacking
Carefully unpack and inspect your new amplifier.
In the carton there should be:
an Owner's Manual
the on/off key (for key switch versions only)
a EDGUM key ring
the amplifier itself.
If there is any damage to the amplifier, contact your dealer
immediately. It is a good idea to keep the shipping carton and packing
materials, as they can be used to protect your amplifier whenever you
need to move it again in the future.
If you need to repack your amplifier at a future time, replacement
packaging is available from EDGUM Audio at a nominal charge.
Contact EDGUM Audio Pty Ltd via the website.

Connecting your amplifier to other components
For safety reasons, always ensure that your amplifier and other
components are turned off and disconnected from mains power before
making any connections. Failure to do so may result in an electrical
shock and/or damage to your equipment.
Loudspeakers
The loudspeaker terminals at the rear of your amplifier are colour
coded red (+) and black (-).
Follow the steps below to connect your amplifier to your speakers.
Step Action
1 Connect the:
red (+) amplifier terminals to the respective red
speaker (+) terminals; and
black (-) amplifier terminals to the respective black (-)
speaker terminals.
Make sure when doing this that you connect the left/right speakers to
the left /right channel outputs on the amplifier.
2 Ensure that all connections points are clean, and that all connections
are secure. Check that wiring terminations look neat and that no
loose strands of wires are touching any other terminals. Failure to
make neat connections may result in poor sound, or amplifier
damage.
Note: We recommend using heavy gauge speaker cable for the best
quality sound (the heavier, the better, and with a 2mm minimum).
ut
Switching
Remote
In
300W (max)
220-240V 50/60Hz
AC
Do Not pen
Speaker
Left
Speaker
+--+ Right
Ne Pas uvrir
Risk of Electric Shock
Risque de Choc Electrique
AustraliaMade in

DVD players, CD players and other components
There are five input connections at the rear of your amplifier labelled
DVD1, DVD2, VC , CD and AV1. Each of these inputs has a left and
right channel jack, and these are colour coded white (left channel) and
red (right channel).
Connect the output jacks of each of your components to the
corresponding input jacks at the rear of the amplifier. When doing this,
be careful to ensure that the correct left/right channel connections
have been made. CA connectors are colour coded to help you, so use
the white plugs for the left channel and the red plug for the right
channel. We recommend the use of high quality CA interconnects
wherever possible, for the best quality sound.
The amplifier inputs are all the same sensitivity, and will accept a
signal from any line-level source (Mini Disc, DAT player, VC , Tuner,
etc.). Therefore, any unused inputs may be used by other components.
If you wish to connect a Turntable, you will need to purchase a
separate Phono pre-amplifier. EDGUM Audio produces a stand-alone
Phono pre-amplifier, model GPH. If in any doubt, consult your dealer.
Record ut Preamp
AV1CDVCRDVD2DVD1
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REDGUM Integrated Amplifier

External power amplifier
Your EDGUM amplifier comes with ‘Preamp Out’ sockets. This allows
the amplifier’s pre-amp stage to be connected to an external power
amplifier if desired. To do this, connect your EDGUM amplifier’s
outputs marked left/right Pre-amp Out to the corresponding left/right
Pre-amp inputs on the external power amplifier using high quality CA
interconnects.
Record out
The ecord Out/Tape Out sockets allow you to record a signal coming
in through any of the input sockets (for example, your CD player). This
signal is unprocessed, and fed directly from the input sockets to the
ecord Out sockets to allow the best quality “straight through”
recording. Use CA connectors to connect the ecord Out sockets to
your recording device.

How to use your REDGUM amplifier
At the front of your amplifier is an on/off switch, and three rotary
controls. These are used to turn the amplifier on and off, select the
input source, and adjust the volume and balance.
Turning the amplifier on and off
Your amplifier utilises a key switch as the on/off control, or the option
of a rocker/toggle switch if preferred.
For rocker/toggle switch versions, flick the switch on the front panel to
turn the amplifier on and off.
For key switch versions, insert the key provided into the lock. When
the key is vertical, the power is off. To turn on the power, rotate the
key clockwise a quarter turn. N.B. emote Control models will only
operate with the key in the on position.
You may remove the key when the amplifier is turned on. However, it
is recommended that you leave the key in place for convenience. If
you do remove it, you can safely turn the amplifier on and off by using
the rocker of the Circuit Breaker switch (marked eset/Off) at the rear
of the chassis. In this case, rocking the switch to the ‘ eset’ position
will turn the amplifier on. Alternatively, you can safely turn the
amplifier on and off from the power point when the Circuit Breaker
switch is in the ‘ eset’ position.
Note
Always make sure that the volume is turned down before turning on your
amplifier, to protect your equipment.
Why do I hear sounds when turning my amplifier on and off?
You can expect to hear sounds from your loudspeakers when turning
your EDGUM amplifier on and off. Usually, you will hear a slight ‘pop’
sound when turning on, and several low 'thunk' sounds when turning
off. These sounds are caused by electrical energy increasing and

decreasing within the amplifier. They are a sign that your amplifier is
operating normally, and are not a cause for concern.
More on 'thunks'
In greater detail, EDGUM amplifiers make audible 'thunks' when
powered up and down, but usually only the latter ones are noticeable
to people. A EDGUM amplifier has no need to mask this sound with a
troublesome relay in the speaker line. In fact, customers can be
reassured that this sound is a healthy sign that the amplifier is flexible
enough to cope with such rapid changes in the power supply.
What actually causes the 'thunks' is best explained for the process
during the powering down of a EDGUM integrated amplifier (35W,
60W or 120W), which has both channels run from a shared power
supply. When the system is turned off, the first and weaker 'thunk'
comes from both speakers together, as the power in the supply (which
is common to both channels) “settles” below the voltage required for
stable operation. The voltage available to the amplifier continues to fall
till eventually the output stage of one of the channels goes into
conduction, thus grabbing and dumping the remaining stored power
into the speaker line of that channel. This dumping causes the
remaining supply of power to collapse, causing the third and loudest
'thunk', but only through the channel where the power was dumped.
As a result, the second channel is left with virtually no power to access
from the shared supply. Since the separate output stages of the
channels have reached their critical cut-off voltages sequentially, the
second channel is deprived of the power required to produce a sound
of the same proportions as the loud 'thunk' from the first channel.
Because of component tolerances, the final 'thunk' sound is usually
heard from the same channel.
This same process occurs with the 170W and 300W Monoblock
EDGUM amplifiers, but with both channels producing their final
‘thunks’, each in their own time. Each channel has its own power
supply, so the fall in voltage affects only that channel, causing it to
collapse as described above.
Input source selection
otate the input selector to choose which component will play through
your amplifier.
Note
Always make sure that the volume is turned down before changing the
input source, so protecting your equipment.

Volume and Balance control
EDGUM amplifiers are available in two versions using Dual Mono
volume controls – manual or remote control.
For both manual and remote versions, the left rotary control affects the
volume of the left speaker and the middle rotary control affects the
volume of the right speaker.
When done manually, the simplest way to alter the volume level
involves only one hand and is done by ear, so the setting chosen
automatically adjusts for your room acoustic at the same time. To do
this, set the volume for one channel at the generally desired level.
Then by focussing on the other channel, bring the volume up till the
image appears central.
Alternatively, the dual volume controls can be moved together easily,
again using only one hand. Place the outer side of your hand onto the
top of the two controls. With a slight downward pressure to maintain a
“grip” on them, slide your hand to the left or right to adjust the volume.
Should it be required because of room acoustics, further fine
adjustments can be made with the individual controls once the volume
level and position of image has been chosen. If preferred, a belt is
available from the manufacturer that circles the two controls so they
move together when only one control is turned.
For emote Control models, the same left-right volume adjustment is
done via the remote's Left- ight Arrow buttons. Except for the “Bal”
(Balance) and “Mute” buttons, all functions are as commonly used in
remotes of all kinds.
N.B. The “Mute” button cuts the volume by approximately 15dB, i.e. it
is a partial rather than total Mute. Pressing the “Bal” (Balance) button
is the quick way to match the volume levels of both channels. This
results by recalibrating the levels up to 200 times within 2 seconds to
achieve +-0.1dB balance.
For greater detail about the basic functions of the Dual Mono emote
Control, please see the “Firmware” page.
In addition, using the Dual Mono emote Control, each amplifier can be
personalised using EDGUM's own Control Options software (see
separate Technical Information Section handout). For example, these
options provide choices of a Professional Fade, “Memory Select” of last
remembered volume level, and “Volume Control Movement” to help
maintain the customer's intentionally set balance differential.

Achieving the best sound from your system
This section is provided to offer some general assistance to those
seeking to get the very best performance from their system. You will
be surprised by just how much improvement can be had by
experimenting with a few simple factors. The following advice is based
on our own years of trial and error, and we hope that checking through
it makes a positive difference to the sound of your system.
Where to put your speakers
Deciding on the best placement for speakers is a very individual thing,
as each of us has our own listening preferences. Try moving your
speakers around while listening to some favourite tracks until you find
the result which suits you best.
Distance from the surrounding walls
Placing your speakers right in the corners of the room can result in
bass which sounds 'boomy'' and unclear. Try to keep your speakers at
least 30cm (12in) from both the rear and side walls. Bigger distances
will usually bring about an additional improvement in the sound.
Distance between the speakers themselves
The correct distance between the speakers will depend on the size of
your listening room, and your personal taste. Start by experimenting
with the speakers from two to four metres (six to twelve feet) apart.
Distance between the speakers and the listening position
The best stereo imaging will be achieved when the listening position
creates the point of a triangle, where the other two points are formed
by the speakers themselves. Start with your listening position making
an isosceles triangle, and experiment by moving forwards and
backwards.
The angle (“toe-in”) of the speakers
At EDGUM Audio we recommend a 30 degree angle between the
speakers. This provides a strong central image, and suitable 'timing' to
provide good rear projection for Home Theatre. You should
experiment, however, to find the sound that suits you best.

Your listening room
Strange as this may sound, the room itself will have a profound affect
on how your audio system responds. In fact, many experts consider
the room to be as important to the sound as any other component in
your system!
Did you ever notice how it’s difficult to talk in some restaurants
because you can’t hear each other over all the other conversations
going on around you? Yet another similarly sized restaurant is
perfectly suited to intimate romantic murmuring. The difference lies in
the surfaces around you. Here is a simple test – go into your bathroom
and clap your hands; then clap them again in a room with carpet,
curtains and other soft furnishings. Notice the difference? In a room
with many hard reflective surfaces sound waves bounce around a lot
before dying out. Not even the most expensive stereo in the world is
capable of sounding good in such a challenging acoustic environment.
When it comes to your listening room the same principles apply.
Wooden floorboards, polished concrete and slate tiles are all highly
reflective surfaces. In a room without curtains or other wall furnishings
the sound may be overly ‘bright’ or aggressive.
Similarly, it is possible for a room to be too ‘damped’ or absorptive.
Where there are no reflective surfaces at all the sound may seem
‘dead’ or lacking in energy and excitement.
Luckily for us, most household rooms are a combination of the two.
And, generally speaking, a combination of the two will bring about the
best results.
Too many hard surfaces?
If your room is too ‘bright’, try placing a large rug on the floor between
your listening position and the speakers. Or hang some soft
furnishings from the walls.
Too many soft surfaces?
If your room is too damped, try removing some of the soft furnishings
from the walls or rugs from the floor.
Managing the bass
Sometimes, low frequency waves can also bounce around and cause
problems in a listening environment. This may be the result of the
shape of the room, or the materials it is constructed from. Large
pieces of furniture in a room can often help to break up these ‘standing
waves’.
While few of us will feel the need to totally redesign a room to improve
its sonic properties, sometimes a small change, like placing a rug on
the floor, can make a big improvement to the sound.

ther helpful hints
Corrosion and sound system terminals
Atmospheric corrosion can build up on speaker cable and interconnect
terminals over time. Should this occur, removing and re-inserting wires
and cables will improve the contact and hence the quality of signal
transmission. Always remember to turn off all equipment before
connecting or disconnecting any wires or cables.
Placement of components in your sound system
Lots of fresh air is important to the health of your electronics. The
louder you play your music, the more important it is to ensure that
components receive adequate ventilation. Amplifiers, in particular, will
generate a lot of heat. Placing the amplifier at the top of the stack, and
ensuring adequate ventilation, will help to ensure that the heat can be
dissipated as it should.

Troubleshooting
The following troubleshooting guide is designed to assist you in
identifying and rectifying any problems you may experience with your
speakers.
Symptom Likely cause Recommended action
No sound The amplifier is not turned on, or is
not connected to the power outlet
Check that the amplifier is plugged
into the power outlet, and turned on
The sound of a particular
input source is not heard
Improper connections Make sure that the external
component is connected correctly
Stereo image is
vague/bass response is
lacking
Speakers out of phase Check that the correct + to + and –
to – connections have been made
between the amplifier and your
speakers
Buzzing or crackling sound
when connecting wires
Equipment is turned on Turn off all equipment before
making any cable connections
Distortion at low volumes Speaker wires are touching each
other, or another terminal, and
shorting the signal
Amplifier is damaged
Ensure that all cable connections are
clean with no loose wires
Check/repair amplifier
Distortion at high volumes Amplifier is overloaded Turn down the volume to avoid
damage to your speakers and
amplifier
If the problem cannot be resolved by any of these recommended
actions you should make certain that the problem lies with the
amplifier, as malfunction within other components may also be the
cause of the symptoms. You can do this by borrowing a CD player and
speakers that you are certain are working, and replace your normal
components with these to test the amplifier in isolation. If the problem
persists, please see your local EDGUM Audio dealer.

Lost Keys
Lost keys can be replaced, as information is kept on file at the EDGUM
factory about every product we manufacture. If you provide us with
the serial number of your product (look under the amplifier, on the
carton, or on the final test report issued with the product), we can
provide you with another key. Just contact the factory with the details
and a replacement key will be sent by airmail the same day.
(Fax: [phone], or email [email protected] )
Thermal cut-off
For your convenience, there are no replaceable fuses in this amplifier.
The only overload devices are thermal. Internally, there are thermal
cut-offs that will shut down the amplifier if the heat sinks reach 80
degrees Centigrade. This would usually only happen if the speaker
leads remain ‘shorted’ for a period of time.
Should this occur, your amplifier will resume operation once it has
returned to normal operating temperature.
Circuit breaker
Additional protection for your equipment is built into the amplifier in
the form of a Circuit Breaker. Found on the rear panel of the chassis, it
is a rocker switch with ESET and OFF positions. (See also section –
Turning the amplifier on and off.)
In the (unlikely) event of a power overload or an internal malfunction,
the Circuit Breaker on the rear will activate (‘trip’). The switch will
automatically rock to the OFF position, and a red light will be seen
inside the rocker.
In the case of a power overload, rocking the switch to the ESET
position will turn on your amplifier again. When reset the red light will
turn off and you will hear a ‘thunk’ sound as the amplifier powers up.
However, in the event of an internal malfunction, resetting the switch
will not be possible. When the switch is rocked to the ESET position, it
will instantly flick back to the OFF position, and the red light will stay
‘on’. Should this occur, the amplifier will need professional service.
If in any doubt whatsoever, please consult your dealer.

Specifications
RGi35 / RGi35ENR
(Dual Mono volume controls – manual or with emote Control option)
Power Output RGi 5:5+ 5 Watt/Ch MS (Transient 90 +90 W MS)
Power Output RGi 5ENR:50+50 Watt/Ch MS (Transient 120 +120 W MS)
Harmonic Distortion: 0.009% (below clipping)
Intermodulation Distortion: < 0.005% (below clipping)
Signal to Noise: > 100dB
Input Impedance: 10K (Matches 600 ohms – 50K)
Frequency esponse: 0.8Hz – 80KHz (-3dB points)
Peak Current: > 120 amp
Audio Inputs: 5 inputs:- CD1, AV1, DVD, CD2 & AV2
Suggested Speakers: EDGUM GS Manna
Cabinet Finish: solid ed Gum wood fascia, powder-coated
1.6mm steel chassis
Dimensions: 420mm (W) x 360mm (D) x 93mm (H)
Shipping weight: 9 kg (8.2 kg cubic)
RGi60 / RGi60ENR
(Dual Mono volume controls – manual or with emote Control option)
Power Output RGi60:60+60 Watt/Ch MS (Transient 132 +132 W MS)
Power Output RGi60ENR:75+75 Watt/Ch MS (Transient 160 +160 W MS)
Harmonic Distortion: 0.009% (below clipping)
Intermodulation Distortion: < 0.005% (below clipping)
Signal to Noise: > 100dB
Input Impedance: 10K (Matches 600 ohms – 50K)
Frequency esponse: 0.8Hz – 80KHz (-3dB points)
Peak Current: > 150 amp
Audio Inputs: 5 inputs:- CD1, AV1, DVD, CD2 & AV2
Suggested Speakers: EDGUM GS Manna or GS Lucens
Cabinet Finish: solid ed Gum wood fascia, powder-coated
1.6mm steel chassis
Dimensions: 420mm (W) x 360mm (D) x 93mm (H)
Shipping weight: 10 kg (8.2 kg cubic)

RGi120
(Dual Mono volume controls – manual or with emote Control option)
Power Output RGi120:120+120 Watt/Ch MS (Transient 285 +285 W MS)
Harmonic Distortion: 0.009% (below clipping)
Intermodulation Distortion: < 0.005% (below clipping)
Signal to Noise: > 100dB
Input Impedance: 10K (Matches 600 ohms – 50K)
Frequency esponse: 0.8Hz – 80KHz (-3dB points)
Peak Current: > 150 amp
Audio Inputs: 5 inputs:- CD1, AV1, DVD, CD2 & AV2
Suggested Speakers: EDGUM GS Lucens or GS egnans
Cabinet Finish: solid ed Gum wood fascia, powder-coated
1.6mm steel chassis
Dimensions: 420mm (W) x 360mm (D) x 93mm (H)
Shipping weight: 11 kg (8.2 kg cubic)
RGi120ENR
( Dual Mono volume controls, SignWave heat sink – manual or with emote Control option)
Power Output RGi120ENR:155+155 Watt/Ch MS (Transient 293 +293 W MS)
Harmonic Distortion: 0.009% (below clipping)
Intermodulation Distortion: < 0.005% (below clipping)
Signal to Noise: > 100dB
Input Impedance: 10K (Matches 600 ohms – 50K)
Frequency esponse: 0.8Hz – 80KHz (-3dB points)
Peak Current: > 150 amp
Audio Inputs: 5 inputs:- CD1, AV1, DVD, CD2 & AV2
Suggested Speakers: EDGUM GS Lucens or GS egnans
Cabinet Finish: solid ed Gum wood fascia, powder-coated
1.6mm steel chassis
Dimensions: 420mm (W) x 360mm (D) x 93mm (H)
Shipping weight: 17 kg (16.5 kg cubic)

Warranty
EDGUM amplifiers are warranted to be free of defects in material and
workmanship, subject to the following conditions and limitations, for
SEVEN (7) years from the date of purchase by the original owner.
Warranty claims must be accompanied by proof of purchase, including
date.
This warranty is subject to the following conditions and limitations.
This warranty is void and inapplicable if the amplifier has:-
not been used in accordance with the instructions contained
in the manual;
been subject to misuse or abuse, one example of which
would be damage consistent with speaker terminals being
hooked to another electrical source;
been modified, repaired or tampered with by anyone not
specifically authorised in writing to do so by EDGUM or its
agents;
been damaged by accident, intent, neglect or transportation.
N.B. As per industry standard, fuses, lamps (LEDs) or batteries are not
covered under warranty.
Should the product be faulty, the owner is liable for the cost of freight
to the nearest EDGUM repair agent, or the EDGUM Audio factory.
Should the product be found to be without fault, the owner will be liable
for the return freight also.

Warranty Registration
Complete for warranty registration:
Name
Address
City
Zip/Post Code
Country
Date of purchase
Place of purchase
Model No.
Serial Number (if any)
Fax this page to the EDGUM Audio factory at [phone]
Alternatively, you may email the details (including Serial Number) to
[email protected]. (Not necessary for factory direct
purchases.)
If you are not the original owner of this EDGUM product, feel free to
send your unit’s details to [email protected] so that you can
be placed on the EDGUM Owner’s egister. We welcome your
feedback and would be happy to include you on our EDGUM Updates
email list.