MBL 9007 Manuale utente
ENGLISH
DEUTSCH
mbl 9011 | mbl 9008 A | mbl 9007
1
Important Information!
Attention: The unit must be protected against humidity, vibration and excessive dust and should not be exposed to
direct sunlight or intense sources of heat (radiators). Do not operate the unit in the immediate vicinity of sources
of electrical interference (e.g. fluorescent lamps or electric motors). The permitted operating temperature is 10°C
up to 40°C (50°F up to 104°F). Avoid extreme variations in temperature.
Do not operate the unit under condensation! After exposure to low temperatures allow the unit to warm up for
at least three hours.
Do not open the unit and do not make any alterations to it.
If you wish to place the unit on a rack, you must ensure sucient ventilation. Minimum clearances of 10 cm (4 inch)
above the unit and 2 cm (0,8 inch) on all sides must be observed. The ventilation openings of the unit must not
be covered with tablecloths, magazines, curtains and the like in order not to interfere with the heat dissipation.
Make sure that no fluid-filled vessels (glasses, vases…) are put on the device to prevent water from ingressing the
device, and the device is never exposed to splash water.
NEVER switch power amplifier on when no speaker is connected!
KETI, CE-Marking
This product conforms to the requirements of the EMC directive and low-voltage directive. Your MBL component
complies with the household power and safety requirements in your area.
Warranty
Please pay attention to the details given in the warranty card which accompanies the unit. Warranty is only issued,
if you send back the warranty card.
mbl 9011 | mbl 9008 A | mbl 9007
2
Page
3 1. Placement
3 2. Connecting Power Amplifier(s) to Speakers and Preamplifier
4 2.1 General Information Wiring
5 2.2 a) Connecting to speakers in stereo mode, single wiring
6 2.2 b) Connecting to speakers in stereo mode, bi-wiring
7 2.2 c) Connecting to preamplifier in stereo mode
8 2.3 a) Connecting to speakers in mono mode, single wiring
9 2.3 b) Connecting to speakers in mono mode, bi-wiring
10 2.3 c) Connecting to preamplifier in mono mode
11 2.4 a) Connecting to speakers in stereo mode, bi-amping (2 power amps)
12 2.4 b) Connecting to preamplifier in stereo mode, bi-amping (2 power amps)
13 2.5 a) Connecting to speakers in mono mode, bi-amping (4 power amps)
14 2.5 b) Connecting to preamplifier in mono mode, bi-amping (4 power amps)
15 3. Installation
15 3.1 Power Switches
16 3.2 Mains Voltage
16 3.3 Fuses
16 3.4 First Operation
16 3.5 Standby Mode and Sleep Mode
17 3.6 Remote switching-on
17 4. Maintenance
18 5. Troubleshooting
19 6. Views
19 6.1 mbl 9011 Views
20 6.2 mbl 9008 A Views
21 6.3 mbl 9007 Views
22 7. Specifications
mbl 9011 | mbl 9008 A | mbl 9007
3
1. Placement
Please ensure that there is sucient ventilation and flow of air on all sides of the amplifier. There must be a minimum space of
10 cm (approx. 4”) above the amplifier so that the heat can escape.
Note: Never completely cover or operate the amplifier in a place with insucient flow of air. If you do, the amplifier may over-
heat.
In case you wish to operate two or more amplifiers never stack them. You may place them on shelves or fit them under a cabinet.
Remember to keep the minimum space of 10 cm (approx. 4”) above the amplifier.
Keep the amplifier away from humidity, vibration, excessive dust and direct sunlight. Do not operate the amplifier near other
electric appliances (for instance neon lights and motors).
2. Connecting Power Amplifier(s) to Speakers and Preamplifier
To connect your power amplifier(s) properly to your loudspeakers and your preamplifier please refer to the following descrip-
tions and diagrams.
Attention! The power amplifier works fully balanced, if operated as mono block. The minus-terminals are not connected to
ground. Therefore, never connect any ground-related potentials, as is common with active and semi-active speaker systems
(including active subwoofers).
Advice: Remove all cables from inputs that are not in use. Pin assignment of XLR plug
1 = ground
2 = + in phase
3 = - o phase
mbl 9011 | mbl 9008 A | mbl 9007
4
2.1 General Information Wiring
Please note when wiring your amps mbl 9008 A and mbl 9011:
In the planning of high quality music systems, the cabling plays an important role. Users should pay particular attention to the
selection of the proper cable and cabling structure. This is especially true when the music system works with high-quality ampli-
fiers with high bandwidths, such as the mbl 9011 or mbl 9008 A.
Increasingly, it should be noted that some cable manufacturers oer quite exotic cable types in addition to well-functioning
cable designs and recommend alternative cabling types and structures. However, this does not always lead to the desired opti-
mization of the sound, but on the contrary can lead to a deterioration of the sound quality or even cause damage to or destruc-
tion of individual components of your music system.
To prevent this, when using our amplifiers mbl 9008 A or mbl 9011, please consider the following points. We expressly point out
that non-observance can lead to sound degradation and malfunction or damage to portions of your music system:
1. The plus conductor and minus conductor of your speaker cable must run together in a common cable. A separate routing
of the lines would lead to the formation of a magnetic field, which would be greater, the greater the distance between the
lines. This would increasingly occur, particularly at higher frequencies, since the magnetic field is proportional to the square
root of the frequency.
2. All signal cables between the individual components of the music system must be shielded. Never use unshielded or “float-
ing shield” cables, even if they are currently highly touted by some cable manufacturers. Non-compliance leads to interfer-
ence of radio signals from mobile phones and mobile phone masts, Wi-Fi radio waves, DECT signals or other RF signals.
3. Input cable to the power amps should never be laid parallel to the speaker cables, since this would lead to interference of
the output signal in the input signal. If at all possible, please cross the input cable and the speaker cable at 90 degree angles
to minimize this potential.
Strict observance of the above points will ensure that no high frequency magnetic field is created which might intersperse in the
input signal and lead to the intensification of magnetic positive feedback and oscillation. Such eects could otherwise result in
damage to or destruction of the output stage, harm loudspeaker parts/drivers, etc.
mbl 9011 | mbl 9008 A | mbl 9007
5
2.2 a) Connecting power amplifier to speakers in stereo mode, single wiring
Note the imprint STEREO on the back of the power amplifier.
If you want to connect one power amplifier to your loudspeakers in single wiring mode, use the STEREO connectors on the back
of the power amplifier. Connect the right speaker to the terminal area marked with R and the left speaker to the terminal area
marked with L. Connect the minus terminal of each speaker with the respective ground connector ( ) of the power amplifier.
Connect the plus terminal of each speaker to the respective plus connector (STEREO) of the power amplifier.
power amplifier
stereo
right speakerleft speaker
Example with mbl 111 F Radialstrahler Hybrid
mbl 9011 | mbl 9008 A | mbl 9007
6
2.2 b) Connecting power amplifier to speakers in stereo mode, bi-wiring
Note the imprint STEREO on the back of the power amplifier.
If you want to connect one power amplifier to your loudspeakers in bi-wiring mode, use the STEREO connectors on the rear side
of the power amplifier. Connect the right speaker to the terminal area marked with R and the left speaker to the terminal area
marked with L.
Connect both minus terminals (WOOFER and SYSTEM) of each speaker with the respective ground connector ( ) of the power
amplifier. Connect the plus terminals of each speaker to the respective plus connectors (STEREO) of the power amplifier.
left speaker right speaker
power amplifier
stereo
WOOFER
terminals
SYSTEM
terminals
WOOFER
terminals
SYSTEM
terminals
Example with mbl 101 E MKII Radialstrahler
mbl 9011 | mbl 9008 A | mbl 9007
7
2.2 c) Connecting power amplifier to preamplifier in stereo mode (Unbalanced Stereo)
Connect the preamplifier‘s output to the power amplifier‘s input with RCA cable.
Note: Right channel „R“ (red) and left channel „L“ (white).
preamplifier
RCA cable left
RCA cable right
power amplifier
stereo
mbl 9011 | mbl 9008 A | mbl 9007
8
2.3 a) Connecting power amplifiers to speakers in mono mode, single wiring
Note the imprint MONO on the back of the power amplifier.
If you want to connect two power amplifiers to your loudspeakers in single wiring mode, use the MONO connectors of the power
amplifiers. Connect the plus terminal of each speaker to the respective plus connector of the power amplifier and the minus
terminal to the minus connector.
left speaker right speaker
mono power amp left mono power amp right
Example with mbl 111 F Radialstrahler Hybrid
mbl 9011 | mbl 9008 A | mbl 9007
9
2.3 b) Connecting power amplifiers to speakers in mono mode, bi-wiring
Note the imprint MONO on the back of the power amplifier.
If you want to connect two power amplifiers to your loudspeakers in bi-wiring mode, use the MONO connectors of the power
amplifiers. Connect each loudspeaker to one power amplifier. Connect the plus terminals (WOOFER and SYSTEM) to the respec-
tive plus connectors and the minus terminals to the minus connectors.
left speaker right speaker
mono power amplifier
left
mono power amplifier
right
WOOFER
terminals
SYSTEM
terminals
WOOFER
terminals
SYSTEM
terminals
Example with mbl 101 E MKII Radialstrahler
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