Electro-Harmonix LPB-2UBE User manual

LPB-2UBE
Stereo Tube Pre-Amp
Congratulations on your purchase of the LPB-2ube! The LPB-2ube is a full bandwidth
(20-20K), stereo pre-amp with an all-tube signal path using two premium 12AX7WB
vacuum tubes. Carefully reading these instructions will ensure you will get the most
out of your LPB 2ube.
- OPERATING INSTRUCTIONS -
Included with the LPB-2ube is a unique 12VAC/1000mA adapter. Use only the
adapter supplied. Using any other adapter can cause harm to you, the LPB-2ube and
the adapter. DO NOT LEAVE THE ADAPTER PLUGGED INTO A POWER OUTLET IF IT
IS NOT PLUGGED INTO THE LPB-2UBE.
- CONTROLS -
INPUT LEVEL Switch –Selects between LO and HI input level. The LO setting will
provide more overall gain through the LPB-2ube, the HI setting provides less gain. If
the input signal is from a low-level source such as a guitar or an instrument that uses
pickups, then the LPB-2ube will work best in the LO setting. If the input signal is
from a line level source such as a synthesizer, sampler, or mixer, the LPB-2ube will
work best in the HI-setting. This switch controls both the left and the right channels
simultaneously.
DRIVE R & DRIVE L Knobs –Adjusts the amount of gain or drive for each channel.
Drive R controls the right channel and DRIVE L adjusts the left channel.
VOLUME R & VOLUME L Knobs –Adjusts the overall output level or volume for each
channel. VOLUME R controls the right channel and VOLUME L adjusts the left
channel.
WARNING: There are extremely high voltages in the LPB-2ube even when it
is unplugged –DO NOT OPEN THE LPB-2UBE.

- INDICATORS -
POWER LED –Lights when the LPB-2ube is powered on.
STATUS LED –Lights when the LPB-2ube effect is engaged; Stays off when the LPB-
2ube is in true bypass mode.
- I/O ROUTING -
Mono-to-Stereo Signal Splitter –The LPB 2ube can be configured as a signal splitter.
Plug an instrument into the R (mono) Input and leave the Left Input unplugged. This
will allow the signal going through the Right Input to go into both the right and left
amplifier channels. Each amplifier section is processed independently, whether it is
two guitar amps, a series of Electro-Harmonix effects pedals, tape recorder inputs, or
two mixer channels.
Stereo-to-Stereo –To use the LPB-2ube as a stereo pre-amp, plug the left and right
outputs on your instrument into the Left and Right Inputs of the pedal respectively.
Each stereo channel is independently controlled. Connect the outputs to the inputs of
your tape recorder, mixer or power amp.
Mono –The LPB-2ube can be configured as a mono tube distortion pedal by putting
the two pre-amp channels in series. This provides 2 volumes and 2 drive controls,
which can be set for a wide variety of overdrives. Experiment with the four knobs and
you will see the many possibilities… from bluesy to total grunge and anywhere in
between. An additional patch cable will be needed, preferably one that is 1 ft. in
length or shorter. Plug your instrument into the R (mono) Input. Plug one end of
the short cable into the Left Input and the other end into the Right Output. The
output of the LPB-2ube will come from the Left Output, so plug the Left Output into
the guitar amp. Warning: This setup can be very loud; make sure the amp is off
when setting it up and the VOLUME L knob is turned down all the way before turning
the amp on.
Hard Disk Recording –Virtually all of today’s audio converters, in the home studio
market, which are related to hard disk recording not only need pre-amplification but
demand pre-amplification in order to get a clean high gain signal for optimum
recording. The LPB-2ube presents an all tube, analog circuitry to give a fat signal
with a warmth and calority that will not be lost when the signal enters the digital
domain. The LPB-2ube is your first step in the audio chain. It guarantees that what
is put on disk is the highest quality sound with the character and tightness that is
just unattainable from direct insertion.
- WARRANTY INFORMATION -
Please complete and return the enclosed warranty card within 10 days of purchase.
We will repair the unit for free within one year of date of purchase. If you should
need to return your unit for service within the warranty period, please include a brief
description of the problem as well as your name, address, telephone number, copy of
your receipt, and a check or money order for shipping and handling:
United States -$12
Canada - $15
Europe and other countries - $25
Ship to:
Electro-Harmonix
C/O New Sensor Corporation
47-50 33rd Street
Long Island City, NY 11101
Attn: Service Department
Please make checks/money orders payable to New Sensor Corporation.
To hear demos by rock stars on all EH pedals visit us on the web at www.ehx.com.
Email us at [e-mail]

- INDICATORS -
POWER LED –Lights when the LPB-2ube is powered on.
STATUS LED –Lights when the LPB-2ube effect is engaged; Stays off when the LPB-
2ube is in true bypass mode.
- I/O ROUTING -
Mono-to-Stereo Signal Splitter –The LPB 2ube can be configured as a signal splitter.
Plug an instrument into the R (mono) Input and leave the Left Input unplugged. This
will allow the signal going through the Right Input to go into both the right and left
amplifier channels. Each amplifier section is processed independently, whether it is
two guitar amps, a series of Electro-Harmonix effects pedals, tape recorder inputs, or
two mixer channels.
Stereo-to-Stereo –To use the LPB-2ube as a stereo pre-amp, plug the left and right
outputs on your instrument into the Left and Right Inputs of the pedal respectively.
Each stereo channel is independently controlled. Connect the outputs to the inputs of
your tape recorder, mixer or power amp.
Mono –The LPB-2ube can be configured as a mono tube distortion pedal by putting
the two pre-amp channels in series. This provides 2 volumes and 2 drive controls,
which can be set for a wide variety of overdrives. Experiment with the four knobs and
you will see the many possibilities… from bluesy to total grunge and anywhere in
between. An additional patch cable will be needed, preferably one that is 1 ft. in
length or shorter. Plug your instrument into the R (mono) Input. Plug one end of
the short cable into the Left Input and the other end into the Right Output. The
output of the LPB-2ube will come from the Left Output, so plug the Left Output into
the guitar amp. Warning: This setup can be very loud; make sure the amp is off
when setting it up and the VOLUME L knob is turned down all the way before turning
the amp on.
Hard Disk Recording –Virtually all of today’s audio converters, in the home studio
market, which are related to hard disk recording not only need pre-amplification but
demand pre-amplification in order to get a clean high gain signal for optimum
recording. The LPB-2ube presents an all tube, analog circuitry to give a fat signal
with a warmth and calority that will not be lost when the signal enters the digital
domain. The LPB-2ube is your first step in the audio chain. It guarantees that what
is put on disk is the highest quality sound with the character and tightness that is
just unattainable from direct insertion.
- WARRANTY INFORMATION -
Please complete and return the enclosed warranty card within 10 days of purchase.
We will repair the unit for free within one year of date of purchase. If you should
need to return your unit for service within the warranty period, please include a brief
description of the problem as well as your name, address, telephone number, copy of
your receipt, and a check or money order for shipping and handling:
United States -$12
Canada - $15
Europe and other countries - $25
Ship to:
Electro-Harmonix
C/O New Sensor Corporation
47-50 33rd Street
Long Island City, NY 11101
Attn: Service Department
Please make checks/money orders payable to New Sensor Corporation.
To hear demos by rock stars on all EH pedals visit us on the web at www.ehx.com.
Email us at [e-mail]