Schertler Arthur ART48 STEREO IN User manual

ACOUSTIC FIDELITY
arthur
ART48 - STEREO IN
USER MANUAL
Assembling instruction on ART48-L/Rmast manual
Version 2017
V2

WARNINGS
PRECAUTIONS
WARNINGS Please read this manual carefully before using your
ROY amplier and observe all safety precautions
Keep this manual for future reference
Do not pour any liquids onto this device, or operate it in excessively humid conditions.
Do not use or install this device near sources of excessive heat. Do not expose it to direct sunlight, or position it in a
dusty environment without any form of protection.
Ensure that the mains voltage does not exceed the value indicated on the back panel.
Do not use this device if either the mains cable or its plug is not in perfect condition. (Replace if necessary.)
If the mains cable needs replacing, it must be done by an appropriately qualied person. The replacement cable must
be exactly the same as the original.
To avoid interference, do not use this device near power transformers, TVs, RF transmitters, electric motors or any
other source of electrical energy.
Do not point a microphone towards any speakers as this could result in feedback (Larsen effect) and ultimate damage
to your device.
Only use the original connection cables – if supplied with the device. Otherwise this could prove both costly and
inconvenient.
To completely disconnect this device from the AC mains, remove the power cable plug from the mains socket.
When cleaning, do not use solvents (e.g acetone or alcohol). These could damage the external nish and the serigraphy.
Do not attempt to service this device. If any malfunction is detected, call the nearest technical assistance centre, or a
specialist technical centre.
To maintain good ventilation, never cover or obstruct the heat sink with blankets, sofas or any other furnishings.
Always leave sufcient clearance between the heat sink and any other surface.
No ammable sources, i.e. candles, should be placed on or near the device.
This device should never be exposed to water, even in small amounts. No object containing liquids should be placed
on or near the device.
This device should only be connected to a mains socket outlet that has a protective ground.
When using or installing this device, always make sure that the mains socket and the mains cable plug are easily
accessible.

IMPORTANT SAFETY INSTRUCTIONS
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF
UNINSULATED “DANGEROUS VOLTAGE” WITHIN THE PRODUCT ENCLOSURE THAT MAY BE OF A SUFFICIENT MAGNITUDE TO CONSITUTE A RISK OF
ELECTRIC SHOCK TO PERSONS.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND
MAINTENANCE INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE PRODUCT.
WARNING TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK
DO NOT EXPOSE THE APPLIANCE TO RAIN OR HUMIDITY
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (inclu-
ding ampliers) that produce heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two bla-
des with one wider than the other. A grounding type plug has two blades and a third grounding prong. The
wide blade or the third prong are provided for your safety. If the provided plug does not t into your outlet,
consult an electrician for replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched particularly at plugs, convenience recepta-
cles, and the point where they exit from the apparatus.
11) Only use attachments/accessories specied by the manufacturer.
12) Use only with the cart, stand, tripod, bracket, or table specied by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury
from tip-over.
13) Unplug this apparatus during lightning storms or when unused for long periods of time.
14) Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate nor-
mally, or has been dropped.

ART48 - STEREO IN
This CLASS-A unit can receive signals from various sources - mostly audio devices
that generate a line signal (0 dBV) from their output(s). These include effects units, CD
players, tape or digital recorders, preamps of any kind, as well as electronic instruments
such as keyboards and Midi devices.
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- + - +
R
L
0
direct outs
UNITY
UNITY
gain
gain
PFL L
post
pre
Stereo Jack
R
L
pre
hi
low
BUS
PFL
A UX 3
A UX 2
A UX 1
all pots and sw itches in blu color
all plugs and bus in red color
Fader L
ON
post
A UX 2 A UX 3
A UX 1
R
L
+48V
Fader R
ON
PFL R
A UX 2 A UX 3
A UX 1
gain -15dB to +20dB
blockdiagram modular mixer 3.2017 STEREO LINE UNIT
Stereo Jack

ART48 - STEREO IN
PAN (1.)
Each mono input channel has a PAN knob. Although somewhat
unusual for a stereo input, it makes this particular unit more versatile.
The Stereo In effectively consists of two independent mono input
channels, each with their own controls - with the exception of the
LOW/HI Filter that affects both inputs simultaneously.
The two PAN pots therefore play an important role: When set hard left
and right respectively, the Stereo In unit gives you a stereo input - as
its name suggests. When the PAN pots are set to the centre, you get
a stereo input “switched to mono”. Setting one PAN pot slightly to the
left and the other to the right lets you chamfer the stereo image.
When plugging two independent sources into the Stereo In – such as
a guitar and a mono effect – you can then use the PAN pots to route
each source left and right as required.
INPUT SECTION
As a stereo channel strip, the unit has two input connectors (2.): Left
and Right. These are fully balanced, but use space-saving stereo
phone plugs. The tip connects as usual to the hot signal, the ring to
the cold and the sleeve to the ground. Another advantage of these
phone plugs is that you can connect an unbalanced music signal, for
example from a keyboard, via a simple guitar jack.
Although this stereo input unit is intended to accommodate nominal
line level signals, the input amp’s sensitivity can be adjusted from
-15 dBu to +24 dBu using the GAIN knobs(4.). Left and right input
channels can be separately adjusted. Furthermore, by depressing the
UNITY button(5.), the gain will be set to 1, allowing the signal to ow
- without amplication or attenuation - independently from the Gain
knob setting. This could be particularly useful in a recording situation
for example, where several “line level” devices might be connected to
multiple stereo line input units. Here, all inputs can be evenly set to
an accurate nominal level by depressing the UNITY buttons.
DIRECT OUT(2.)
The Direct Out connections work as a sleeve out or “dry line out post
input amp”. You can connect a simple mono phone jack or a stereo
phone jack to the plugs. The unbalanced line signal will be transmitted
through the “tip” of the phone jacks.
LOW and HIGH Filters(6.)
Line signals do not usually need strong shaping. However, a little
correction of the higher and lower frequencies can be useful. The
stereo LOW and HI lter knobs affect both the left and right inputs
simultaneously.
2.
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