2100MKII
STEREO POWER
AMPLIFIER
IA
Stereo Power Amplifier 2100MKII
H.O.M.E. AUTOMATION SERIES
POWER
INSTALLATION NOTES
Your AMC amplifier is supplied set to
work on your local mains supply voltage.
Check that your local mains supply
voltage agrees with the voltage setting
indicated on the back panel of the
amplifier. If not, please contact your
dealer or national distributor for details on
how to proceed further.
The cores of the mains lead are coloured
in accordance with the following code:
Blue
-Neutral
Brown -Live
Note: Export units for certain markets
have moulded mains plugs fitted as
standard.
As the colours in the mains lead may not
correspond with the coloured markings
identifying the terminals in your plug,
proceed as follows:
The wire which is coloured blue must be
connected to the terminal which is
marked by the letter N, or coloured black
or blue. The wire which is coloured brown
must be connected to the terminal which
is marked by the letter L, or coloured red
or brown.
Since the AMC 2100MKII generates
modest amounts of heat, adequate
ventilation is required. Do not place the
amplifier on a soft surface such as a
carpeted surface that may block the
ventilation holes of the bottom cover.
Also, avoid obstructing the ventilation
holes in the top cover.
CAUTION: To prevent the risk of fire or
shock, do not allow any liquid or moisture
to enter into the internal parts of this
product. If any liquid accidentally enters
this product, shut off the power and
remove the AC power cord immediately. If
the liquid is anything other than clean
water or pure alcohol, have the product
examined by a service technician.
Servicing of this product should be
referred to a qualified service technician.
2
REAR PANEL CONNECTIONS/FRONT PANEL CONTROLS
REAR PANEL
5
4
4
SPEAKER
R
SPEAKER
+
+
+
L
Stereo Power Amplifier 2100MKII
BRIDGING
LONDON/L.A.
UNSWITCHED 1A MAX
SERIAL NUMBER
2 CH
INPUT LEVEL
ADJ.
11R- 8328- 4
WELTRONICS CORP.
INPUT LEVEL
ADJ.
POWER RATING
INPUT LEVEL
230V
50Hz
2A
ADJ.
INPUT
INPUT
LINE
INPUT
LINE
OUTPUT
DESIGNED AND ENGINEERED IN LONDON/LOS ANGELES
PRODUCED TO AMC INT'L QUALITY STD IN TAIWAN
LINE
OUTPUT
OUTPUT
MAINS
3
1.
2.
3.
4.
2
1
3
2
1
3
2
1
6
INPUT LEVEL CONTROL
LINE OUTPUT
LINE INPUT
LOUDSPEAKER TERMINALS
5. BRIDGING/2CH "MODE" SWITCH
6. AC RECEPTACLE
7. AC OUTLET
FRONT PANEL
Stereo Power Amplifier 2100MKII
H.O.M.E. AUTOMATION SERIES
POWER
1
1. POWER SWITCH
3
7
1. INPUT LEVEL CONTROLS
Each channel of the 2100MKII has its
own independent level control. Before
turning on the 2100MKII for the first time,
make sure that all level controls are set to
their fully clockwise position. These
controls can be used for various
functions. For example, they can be used
to match the levels of loudspeakers in a
multi-room installation, or to lower the
sensitivity of the power amplifier, so that
the volume control on pre-amplifier is at a
more convenient and usable position.
They can also be used to optimize the
balance in a stereo system.
recommended specially if low
impedance loudspeakers are used.
The following describes the connections
for BRIDGING and 2 channel operation;BRIDGING MODE : When the MODE
SWITCH is set to BRIDGING operation,
only the red terminals on the 2100MKII
are used. For this mode of operation,
connect the red terminal of the speaker to
the red terminal of R CH and the black
speaker terminal to the red terminal of L
CH.
2 CH MODE: When the MODE SWITCH
of the 2100MKII is set to 2 channel
operation, simply connect the wires from
the right speaker to the terminals (marked
+ and -) of R CH, the left speaker to L CH
and so on. Make sure that the red
terminal on each loudspeaker is
connected to the corresponding red
terminal on the amplifier and likewise for
the black terminals.
2. LINE OUTPUTS
Each input has an accompanying line
output which will pass the signal onto
another amplifier input or other line-level
device.
3. LINE INPUTS
There are three (one for the BRIDGING
mode) RCA phono connectors on the
back panel that connect to the inputs of
each of the power amplifiers.
Connections to these inputs are made
with reference to the MODE SWITCH
settings described above;BRIDGING MODE: Connection the input
into the RCA jack of LINE INPUT below
"BRIDGING" at the rear panel.
2CH MODE: In this mode, the 2100MKII
operates as a 2 channel amplifier.
Connections to the inputs of these
amplifiers are made the RCA jacks of L
and R.
5. BRIDGING/2 CH "MODE" SWITCH
This switch allows the 2100MKII to
operate in several modes depending on
the
number of loudspeakers to be
connected. This mode of operation is
defined as follows;BRIDGING MODE: With this switch in the
BRIDGING position, the 2100MKII
becomes a one channel amplifier capable
of driving one 8 ohm loudspeaker at 200
watts. In this mode, the 2100MKII can be
used as a high power, audiophile quality
power amplifier.
CAUTION: In the BRIDGING mode, the
speaker terminals should be directly
wired to the loudspeaker and not to any
accessory device like headphones'
adapters etc. That may share a common
ground with other channels.
2CH MODE: With this switch in the 2CH
position, the 2100MKII becomes a two
channel (stereo) amplifier capable of
driving two 8 ohm loudspeakers at
greater than 100 watts per channel or.
4. LOUDSPEAKER TERMINALS
The 2100MKII is equipped with binding
post type speaker terminals that are
designed to handle the extremely high
peak currents that this amplifier is
capable of giving. Connections from
these terminals to the loudspeakers
should be of heavy-duty wire. Standard
wire of 16 gauge or thicker is
4
driving two 4 ohm loudspeakers at
greater than 200 watts per channel.
that other components can be powered
when your amplifier is switched on.
6. AC RECEPTACLE
Plug the AC line cord into a nearby wall
outlet that provides the correct AC power
line voltage, or into an unswitched
convenience outlet on any AMC product.
UNDER NO CIRCUMSTANCES SHOULD
THE CASE OF THE AMPLIFIER BE
OPENED BY ANYONE OTHER THAN A
QUALIFIED ENGINEER, AS DANGEROUS
VOLTAGES ARE PRESENT INSIDE. ANY
UNAUTHORIZED REPAIR MAY INVALIDATE
YOUR WARRANTY.
7. A/C OUTLET
The A/C convenience outlet is fitted so
1. POWER SWITCH
The press button switch marked power
can be used to switch the 2100MKII on or
off. When the 2100MKII is switched on,
the small indicator above the power
switch will glow blue.
5
SPECIFICATIONS
BRIDGING MODE
Rated power into 8 ohm (IHF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 W
Rated T.H.D. 20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03 %
Clipping power into 8 ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >300W
Dynamic power into 8 ohm (IHF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500W
2CH MODE
Rated power into 8 ohm (IHF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W
Rated power into 4 ohm (IHF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 W
Rated T.H.D. 20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03%
Clipping power into 8 ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115W
Clipping power into 4 ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230W
Dynamic power into 8 ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150W
Dynamic power into 4 ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300W
Current limit into 0.1 ohm and 1 ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Amps
Damping factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >200
Input sensitivity for 1W/ Rated power into 8 ohm . . . . . . . . . . . . . . . . . . 100mV/1Vrms
Input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Kohm//150pF
Frequency response 20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/-0.2dB
-3dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Hz/110KHz
Signal to noise ratio "A" WTD (ref. 1W/8 ohm) . . . . . . . . . . . . . . . . . . . . . . . . . . 100 dB
Separation 20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >70dB
OTHERS
Dimensions (WxHxD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 430x112x288 mm
Net weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.4 Kg
Shipping weight (2 pieces) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.5 Kg
Weltronics Corp. reserved the right to improve its products at any time.
Specifications are subject to change without notice.
6
SAFETY INSTRUCTION
1. READ INSTRUCTIONS
16. DAMAGE REQUIRING SERVICE
All the safety and operating instructions should be read
before the appliance is operated.
2. RETAIN INSTRUCTIONS
The safety and operating instructions should be retained for
future reference.
3. HEED WARNINGS
All warnings on the appliance and in the operating instructions
should be adhered to.
4. FOLLOW INSTRUCTIONS
All operating and use instructions should be followed.
The appliance should not be used near water - for example,
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet
basement, or near a swimming pool, etc.
6. CARTS AND STANDS
The appliance should be used only with a cart or stand that is
recommended by the manufacturer.
7. WALL OR CEILING MOUNTING
17. POWER LINES
(APPLIES TO TUNER AND RECEIVERS ONLY)
An outdoor antenna should be located away from power lines.
5. WATER AND MOISTURE
6A. An appliance and cart combination should be
moved with care. Quick stops, excessive force,
and uneven surfaces may cause the appliance
and cart combination to overturn.
The appliance should be serviced by qualified service
personnel when:
a) The power-supply cord or the plug has been damaged; or
b) Objects have fallen, or liquid has been spilled into the
appliance; or
c) The appliance has been exposed to rain; or
d) The appliance does not appear to operate normally or
exhibits a marked change in performance; or
e) The appliance has been dropped, or the enclosure is
damaged.
PORTABLE CART WARNING
S3125A
This equipment is not designed for use mounted on a wall or a
ceiling.
8. VENTILATION
The appliance should be situated so that its location or position
does not interfere with its proper ventilation. For example, the
appliance should not be situated on a bed, sofa, rug, or similar
surface that may block the ventilation openings, or placed in a
built-in installation, such as bookcase or cabinet that may
impede the flow of air through the ventilation openings.
9. HEAT
The appliance should be situated away from heat sources
such as radiators, heat registers, stoves, or other appliances
(including amplifiers) that produce heat.
18. OUTDOOR ANTENNA GROUNDING
(APPLIES TO TUNER AND RECEIVERS ONLY)
If an outside antenna is connected to the receiver, be sure the
antenna system is grounded so as to provide some protection
against voltage surges and built up static charges.
Section 810 of the National Electrical Code, ANSI/NFPA No.
70-1984, provides information with respect to proper
grounding of the mast and supporting structure, grounding of
the lead-in wire to an antenna discharge unit, size of grounding
conductors, location of antenna-discharge unit, connection to
grounding electrodes, and requirements for the grounding
electrode. See Figure.
a) Use No. 10 AWG (5.3 mm2) copper, No. 8 AWG (8.4 mm2)
aluminum, No. 17 AWG (1.0 mm2) copper-clad steel or
bronze wire, or larger, as a ground wire.
b) Secure antenna lead-in and ground wires to house with
stand-off insulators spaced from 4-6 feet (1.22-1.83 m)
apart.
c) Mount antenna discharge unit as close as possible to where
lead-in enters house.
d) Use jumper wire not smaller than No.6 AWG (13.3 mm2)
copper, or the equivalent, when a separate antennagrounding electrode is used. See NEC Section 810-21(j).
Antenna Grounding According to
the National Electrical Code
10. POWER SOURCES
The appliance should be connected to a power supply only of
the type described in the operating instructions or as marked
on the appliance.
Antenna Lead
In Wire
11. POWER-CORD PROTECTION
Power-supply cords should be routed so that they are not likely
to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs,
convenience receptacles, and the point where they exit from
the appliance
12. CLEANING
The appliance should be cleaned only as recommended by
the manufacturer.
Ground
Clamp
Electric
Service
Equipment
The power cord of the appliance should be unplugged from the
outlet when left unused for a long period of time.
Power Service Grounding
Electrode System
(NEC Art 250 Part H)
14. OBJECT AND LIQUID ENTRY
15. SERVICING
The user should not attempt to service the appliance beyond
that described in the operating instructions. All other servicing
should be referred to qualified service personnel.
Grounding Conductors
(NEC Section 810.21)
Ground Clamps
13. NON USE PERIODS
Care should be taken so that objects do not fall and liquids are
not spilled into the enclosure through openings.
Antenna
Discharge
Unit (NEC
Section 810.20)
National Electrical Code
Available from Library, book
stores, or National Fire Protection
Association (Batterymarch Park,
Quincy. MA 02269).
AMC 21-3004
21R- 4250
PN: 21R-4250