Electro Harmonix LPB-3 Linear Power Booster & EQ effectpedaal Electro Harmonix LPB-3 manual

Welcome to the Electro-Harmonix LPB-3, a compact booster pedal

capable of delivering up to 33dB of clean gain. Powerful Treble, Mid,
and Bass EQ controls allow for wide variation in tone shaping. Addition­ally, the LPB-3 boasts extended +/-15V power rails and switchable
true or buffered bypass modes. Whether your sound needs just a little

nudge, a boost to line level for DAW recording, or to send your
amplier into saturated bliss, the LPB-3 has you covered.

Operating Instructions

Insert the output plug from the supplied 9VDC AC Adapter into the power jack
at the top of the LPB-3. Connect an instrument cable from your instrument to
the Input jack of the LPB-3. Connect an instrument cable between the Output
jack and a suitable amplier or mixer. Press the footswitch to engage the

LPB-3 and light the LED.

A good starting point is to set the knobs to their 12 o'clock positions and the
MAX and Q toggle switches to their lower positions. Increase the BOOST knob

for a noticeable increase in volume compared to bypass mode. Play some of
your favorite licks then further tweak the knobs and switches to dial in your
perfect setting.

POWER SUPPY REQUIREMENTS:

Voltage: 9VDC Current: 120mA Polarity: Center-Negative

This device comes equipped with an Electro-Harmonix 9.6DC-200 power supply. Use of the wrong adapter
or a plug with the wrong polarity may damage the device and void the warranty. Do not exceed 12VDC on the
power plug. Power supplies rated for less than 150mA can cause the device to act unreliably.

Controls and Connections

1. PRE-GAIN Knob Adjusts clean input gain from 0dB (unity) to 20dB before
the signal hits the EQ circuitry. Use PRE-GAIN in conjunction with BOOST and
MAX to ne-tune the total output volume and gain through the LPB-3.

Pro Tip: If the EQ knobs are set in the boost half of their range, signal clipping
can be avoided by decreasing PRE-GAIN. If the EQ settings are set to cut, turn
up PRE-GAIN for more volume.

2. BOOST Knob Sets the output level of the LPB-3, basically working like a

volume control.

3. MAX Switch Boosts the gain at the output stage, and sets the maximum gain

of the LPB-3—from Input to Output—to either 33dB or 20dB. Set MAX to 20dB
for greater dynamics; set MAX to 33dB to drive the signal harder and poten-

tially send your amp into saturation.

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4. MID LVL Knob Boosts or cuts the MID EQ. Turn the MID LVL knob clockwise
from its noon position to boost the MID EQ frequency. Turn MID LVL counter­clockwise to cut MID EQ. Set MID LVL to its center position for a at MID EQ

response.

5. MID FREQ Knob Adjusts the MID EQ center frequency, which is boosted or cut
by the MID LVL knob. The frequency range of this knob is 240Hz to 3.3kHz.

Pro Tip: For a brighter sound, try cutting the low MIDs by setting MID FREQ to

10 o’clock and MID LVL to 11 o’clock.

6. Q Switch Sets the resonance or bandwidth of the MID EQ. Q set to LOW
mode yields an EQ that sounds broader or rounder and affects a larger
range of frequencies. In HIGH mode, the EQ sounds sharper or peakier, af-

fecting a narrow range of frequencies.

7. TREBLE Knob Boosts or cuts frequencies above 3.2kHz. Turn the TREBLE

knob clockwise from noon to boost the high end. Turn the knob counter-

clockwise to cut highs. Set TREBLE to its center position for a at treble

response.

8. BASS Knob Boosts or cuts frequencies below 240Hz. Turn BASS clockwise

from the noon position to boost the low end. Turn the knob counterclockwise

to cut. Leave BASS in its center position for a at bass response.

9. FOOTSWITCH and STATUS LED The footswitch engages or bypasses the effect.
The status LED lights when the effect is engaged and is off while in bypass.

10. BYPASS MODE SLIDE SWITCH Removing the bottom cover allows access

to the BYPASS Mode slide switch, located near the footswitch. The left position,
TRUE, sets the LPB-3 to True Bypass mode (factory default); the right position,

BUFFERED, sets the LPB-3 to Buffered Bypass mode. In True Bypass, the Input

jack is directly connected to the Output jack and is not connected to any

circuitry. In Buffered Bypass, the input signal goes through a high-quality

op-amp buffer, and then is connected to the Output jack.

11. INPUT Jack Audio input jack. Input impedance 1MΩ; Max In: +20dBu

12. OUTPUT Jack Audio output jack. Output impedance 660Ω; Max Out: +22dBu

13. 9VDC Power Jack Insert the output plug of the supplied AC Adapter

into the power jack. The LPB-3 requires 120mA at 9VDC on a center­negative plug. Do not exceed 12VDC at the power jack. The LPB-3 does

not take batteries.

Notes and Specications

Audio input impedance at INPUT jack: 1MΩ
Audio output impedance at AMP jack: 660Ω
Current draw: 120mA at 9VDC
Power Supply: 9VDC, Center-negative polarity

Buffered or True bypass switching available

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WARRANTY INFORMATION

Please register online at www.ehx.com/product-registration or complete and return
the enclosed warranty card within 10 days of purchase. Electro-Harmonix will repair
or replace, at its discretion, a product that fails to operate due to defects in materials
or workmanship for a period of one year from date of purchase. This applies only to
original purchasers who have bought their product from an authorized Electro-Har­monix retailer. Repaired or replaced units will then be warranted for the unexpired
portion of the original warranty term.

If you should need to return your unit for service within the warranty period, please

contact the appropriate ofce listed below. Customers outside the regions listed be­low, please contact EHX Customer Service for information on warranty repairs at
[e-mail] or [phone]. USA and Canadian customers: please obtain a
Return Authorization Number (RA#) from EHX Customer Service before returning your

product. With your returned unit, include a written description of the problem as well

as your name, address, telephone number, e-mail address, RA# and a copy of your

receipt clearly showing the purchase date.

United States & Canada

EHX Customer Service
Electro-Harmonix

co New Sensor Corp.
47-50 33rd Street
Long Island City, NY 11101

Tel: [phone]
Email: [e-mail]

This warranty gives a purchaser specic legal rights. A purchaser may have even greater rights depending

upon the laws of the jurisdiction within which the product was purchased.

UK

John Williams
Electro-Harmonix UK

13 Cwmdonkin Terrace
Swansea SA2 0RQ

United Kingdom

Tel: [phone]
Email: [e-mail]

Europe

Musik Elektronik
EHX Repair Center
Ötterichweg 7
D-90411 Nürnberg
Germany

Tel: [phone]
Email: [e-mail]

COMPLIANCE

Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that inter­ference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Modications not expressly approved by the manufacturer could void the user’s authority to oper­ate the equipment under FCC rules.

The CE logo indicates that this product has been tested and shown to conform with all applicable
European Conformity directives.

The WEEE or “trashcan” logo indicates that this product is made up of electronic components that should not
be trashed alongside household waste but instead should be recycled by a proper electrical waste facility.