MBL 9007, 9008 A, 9011 Owner's Manual

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 sucient 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 sucient 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 insucient flow of air. If you do, the amplifier may over­heat.

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 descrip­tions 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 ampli­fiers with high bandwidths, such as the mbl 9011 or mbl 9008 A.

Increasingly, it should be noted that some cable manufacturers oer 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 opti­mization of the sound, but on the contrary can lead to a deterioration of the sound quality or even cause damage to or destruc­tion 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 “float­ing shield” cables, even if they are currently highly touted by some cable manufacturers. Non-compliance leads to interfer­ence 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 eects 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

mbl 9011 | mbl 9008 A | mbl 9007

10

2.3 c) Connecting power amplifiers to preamplifier in mono mode (Balanced Mono)

Connect the preamplifier’s output to the power amplifier’s input with balanced cable. Connect the right channel “R” of the pre­amplifier to the input of the power amplifier for the right speaker. Connect the left channel “L” of the preamplifier to the input

of the power amplifier for the left speaker.

power amplifier 1

(right speaker)

power amplifier 2

(left speaker)

preamplifier

Balanced cable left

Balanced cable right

mbl 9011 | mbl 9008 A | mbl 9007

11

2.4 a) Connecting power amplifiers to speakers in stereo mode, bi-amping (2 power amplifiers)

Note the imprint STEREO on the back of the power amplifier.

If you want to connect two power amplifiers to your loudspeakers in stereo mode, use the STEREO 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 ground connectors ( ).

left speaker right speaker

stereo power amplifier

left

stereo power amplifier

right

WOOFER
terminals

SYSTEM
terminals

WOOFER
terminals

SYSTEM
terminals

Example with mbl 101 E MKII Radialstrahler

mbl 9011 | mbl 9008 A | mbl 9007

12

2.4 b) Connecting power amplifiers to preamplifier in stereo mode, bi-amping (2 power amps)

This mode requires that the respective preamplifier has 2 outputs of completely the same quality (e.g. mbl 6010 D or mbl 5011).
Use RCA cables for the connection of preamplifier and power amplifier.

Right amplifier: Connect one right stereo channel “R” of the preamplifier to the stereo input “L” of the power amplifier and the
second stereo channel “R” of the same output group of the preamplifier to the stereo input “R” of the power amplifier (right
speaker).

Left amplifier: Connect one left stereo channel “L” of the preamplifier to the stereo input “L” of the power amplifier and the sec-

ond left stereo channel “L”of the same output group of the preamplifier to the stereo input “R” of the power amplifier.

preamplifier

power amplifier left

power amplifier right

RCA cable

RCA cable

RCA cable

RCA cable

mbl 9011 | mbl 9008 A | mbl 9007

13

2.5 a) Connecting power amplifiers to speakers in mono mode, bi-amping (4 power amps)

Note the imprint MONO on the back of the power amplifier.

If you want to connect four power amplifiers to your loudspeakers, connect SYSTEM and WOOFER seperatly to each power
amplifier. Use the MONO connectors of the power amplifier. Connect the minus terminal to the respective minus connector and

the plus terminal to the respective plus connector.

left speaker right speaker

left power amplifier

WOOFER

left power amplifier

SYSTEM

right power amplifier

WOOFER

right power amplifier

SYSTEM

WOOFER
terminals

SYSTEM
terminals

WOOFER
terminals

SYSTEM
terminals

Example with mbl 101 E MKII Radialstrahler

mbl 9011 | mbl 9008 A | mbl 9007

14

2.5 b) Connecting power amplifiers to preamplifier in mono mode, bi-amping (4 power amps)

This mode requires that the respective preamplifier has 2 outputs of completely the same quality (mbl 6010 D or mbl 5011).
Balanced-cables are used for the connection of preamplifier and power amplifier.

Connect the preamplifier’s output-channel 1 (right) with the input “Mono” of the first power amplifier. Connect the preamplifier’s
output-channel 2 (right) with the input “Mono” of the second power amplifier (right speaker).

Connect the preamplifier’s output-channel 1 (left) with the input “Mono” of the third power amplifier. Connect the preamplifier’ s
output-channel 2 (left) with the input “Mono” of the fourth power amplifier (left speaker).

preamplifier

power amplifier left 2 power amplifier left 1

power amplifier right 1power amplifier right 2

Balanced cable left 2

Balanced cable left 1

Balanced cable right 2

Balanced cable right 1