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BP-1 Plus microphone pre-amplifier
Item no. 30 15 94
1.
Intended use
The BP-1 Plus microphone pre-amplifier is used for amplifying and processing microphone signals, but can also
be used for other sound signals, such as from electric guitars. It also provides phantom power for condenser
microphones. The device is only permitted for use with the power unit provided. Do not use any other source of
energy. The power unit has only been approved for connection to 230 V/AC, 50 Hz. Contact with humidity, e.g.
in bathrooms or similar rooms, must be avoided at all times.
For safety and approval purposes (CE), you must not rebuild and/or modify this product. If you use the product
for purposes other than those described above, the product may be damaged. In addition, improper use can
cause hazards such as short circuiting, fire, electric shock etc. Read the instructions carefully and keep them.
Make this product available to third parties only together with its operating instructions.
2.
Delivery content
•
Pre-amplifier
•
Power unit
•
Operating instructions
3.
Features
•
A high-quality tube microphone amplifier, which can be used to avoid the microphone inputs from mixing
desks and multi-trackers which are often very simple, and which produce white noise
•
Direct connection possible between microphones and devices, without microphone inputs
•
Can be used as a DI box for the direct connection of electric guitars to mixing desk inputs
•
Symmetrically switched XLR and cinch connections
•
Drive regulator for distorting electric guitar signals
•
Phantom power supply for condenser microphones
•
Installed limiter (can be switched off)
•
Phase switch
•
Level display with 6 LEDs
•
Two active outputs for use as signal splitters
•
Power supplied via the power unit
•
Stable and robust metal housing
4.
Safety instructions
Read the operating instructions carefully and especially observe the safety information.
If you do not follow the safety instructions and information on proper handling in this
manual, we assume no liability for any resulting personal injury or damage to property.
Such cases will invalidate the warranty/guarantee.
Persons / Product
•
The device is not a toy. Keep it out of the reach of children and pets.
•
The power unit has been constructed according to protection class II and may only be operated on a public
power supply outlet.
•
Never pour out liquids above electrical devices and never leave objects filled with liquids (e.g. vases) on
them or in their vicinity. There is a very high risk of fire or of a fatal electric shock. If fluid does get into the
device, immediately disconnect the power plug from the mains socket and consult an expert.
•
Do not expose the device to high temperatures, dripping or sprayed water, strong vibration or heavy
mechanical loads.
•
The power unit may never be plugged in or out with wet hands.
•
Never replace a damaged connecting cable of the power unit. If the connecting cable is damaged, the
power unit is unusable and must be disposed of. A repair is not permitted.
•
Do not place open sources of fire such as burning candles on or near the device or the power unit.
•
Never operate the device without supervision.
•
Do not use the device in a tropical climate.
•
Check the device and the power unit from time to time for damage.
•
Do not leave the packaging material lying around carelessly since this may become a dangerous toy for
children.
•
On commercial premises, the accident prevention regulations of the Employer's Liability Insurance
Association for Electrical Systems and Operating Materials are to be observed.
Miscellaneous
•
Consult an expert when in doubt about operation, safety or connection of the device.
•
Maintenance, modifications and repairs are to be performed exclusively by an expert or at a qualified shop.
•
If you have questions which remain unanswered by these operating instructions, contact our technical
support service or other technical personnel.
5.
Set-up
When setting up the device, make sure that it is on a stable footing and that you find a
correspondingly stable set-up surface.
Set up the device on a level surface close to a wall socket.
Never cover the device or the power unit when it is switched on. Do not obstruct the air
circulation with objects such as magazines, table cloths or curtains.
6.
Connection
For all connection work, the microphone pre-amplifier must be disconnected from the
power supply (pull the power unit out of the socket!).
Always use suitable shielded XLR or cinch cables for connecting inputs and outputs. Use
of other, unsuitable cables may lead to malfunctioning.
To avoid distortions or false adjustments that may damage the device, only devices with
the same connections may be connected to the XLR or cinch connections.
1.
Connect your microphone or electric guitar to the INPUT.
2.
Connect the mixing desk input to the OUTPUT.
3.
A second OUTPUT can be used to connect headphones or another device (e.g. a guitar amplifier on
stage).
4.
Connect the low-voltage plug of the supplied power unit to the AC 9 V connection.
5.
Do not lay the cables in such a manner that they could be tripped over.
Version 03/11
6.
Plug the power unit into a wall socket.
7.
The operating display POWER lights up as soon as the device is supplied with voltage.
8.
In order to switch the device back off, simply pull the power unit from the wall socket.
7.
Operation
Always deactivate the phantom power supply when no condenser microphone is
connected to the input (PHANTOM POWER switch may not be pressed).
•
Plug the power unit into a wall socket after a connection has been made.
•
Press the PHANTOM POWER switch when using a condenser microphone.
•
Adapt the input sensitivity to your signal source using the GAIN switch and the GAIN INPUT control.
Observe the OUTPUT LEVEL display. The PEAK LED should only light up briefly when signal peaks are
reached.
•
With the LIMIT switch, you can activate the installed limiter.
•
The PHASE switch can be used to rotate the phase position of the output signal by 180°.
•
The DRIVE control is used to regulate the degree of distortion (when electric guitars are used).
8.
Maintenance and care
Always pull the power unit out of the mains socket before cleaning the device.
Be sure to prevent penetration of wetness or dampness into the device.
•
This microphone pre-amplifier is maintenance-free.
•
The outside of the device should be cleaned with a soft, dry cloth only.
•
Never use aggressive cleaning agents or chemical solutions as the surface of the housing could be
damaged.
9.
Disposal
In order to preserve, protect and improve the quality of environment, protect human health and
utilise natural resources prudently and rationally, the user should return unserviceable product to
relevant facilities in accordance with statutory regulations.
The crossed-out wheeled bin indicates the product needs to be disposed separately and not as
municipal waste.
10.
Technical data
Operating voltage:
Power consumption:
Phantom voltage:
Tube:
Frequency response:
Distortion factor:
Dynamic range:
Input impedance:
Output impedance:
Max. input level:
Max. output level:
Dimensions:
Weight:
© 2011 by Conrad Electronic SE.
230 V/AC, 50 Hz (power unit)
9 V/AC (microphone pre-amplifier)
12 W
48 V/DC (±2 V)
Double triode 12 AX 7 (ECC 83)
10 – 20000 Hz
0.3 – 0.7 %
75 – 78 dB
2 / 840 kOhm (XLR / cinch)
600 / 300 Ohm (XLR / cinch)
14 / 22 dBu (XLR / cinch)
28 / 22 dBu (XLR / cinch)
131 x 55 x 154 mm
650 g (without power unit)
These operating instructions are published by Conrad Electronic SE,
Klaus-Conrad-Straße 1, D-92240 Hirschau/Germany.
All rights including translation reserved. Reproduction by any method, e.g.
photocopy, microfilming, or the capture in electronic data processing systems
require the prior written approval by the editor. Reprinting, also in part, is prohibited.
The operating instructions reflect the current technical specifications at time of print.
We reserve the right to change the technical or physical specifications.
V2_0311_02-SB
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