Electro-Harmonix XO KNOCKOUT User manual

- FCC COMPLIANCE -
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: 1) This device may not cause harmful interference,
and 2) this device must accept any interference received, including interference
that may cause undesired operation. If the device is not installed and used in
accordance with the instructions, it may cause harmful interference to radio
communications and void the user's authority to guarantee the equipment.
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.
Modifications not expressly approved by the manufacturer could void the user's
authority to operate the equipment under FCC rules.
KNOCKOUT
Attack Equalizer
Congratulations on your purchase of the Electro-Harmonix KNOCKOUT
ATTACK EQUALIZER! The Knockout is one of the most specific and
powerful tonal adjustment systems that you will ever use. What does that
mean exactly? The KNOCKOUT consists of one Low-Pass filter, one High-
Pass filter and a direct dry signal… each with its own knob. When combined
they yield a very specific and focused tonal sculpture. Extreme and very
specific adjustments are not only simple to set up but also yield a very rich
and defined tone that cannot be obtained from an amplifier or much more
complex equalizing systems. The curves of the filters were specifically
selected for their musical value. They may be used independently to
reinforce a specific area but their real value can be heard when all three are
used together. Get ready for the professional sound that you have been
waiting for.
- CONTROL -
LOW Knob –The LOW knob is a volume control for the low or bass
frequencies. The further you turn the LOW knob clockwise, the louder the
low frequencies will be. The LOW knob controls the output volume from the
Knockout’s 7-Pole Low-Pass Filter. The low pass filter has a fixed cutoff
frequency of 85 Hz. The LOW knob is responsible for contouring the bottom
end in relation to the total sound.
DRY Knob – The DRY knob is a volume control for the signal present at the
Input Jack. The output volume of the dry signal will increase as this knob is
rotated clockwise. Use the DRY knob in conjunction with the LOW and HIGH
knobs to create your tone.
HIGH Knob – The HIGH Knob is a volume control for the high or treble
frequencies. The further you turn the HIGH knob clockwise, the louder the
treble frequencies will be. The HIGH knob controls the output volume from
the Knockout’s 6-Pole High-Pass Filter. The high pass filter has a fixed cutoff
frequency of 6.5kHz. The HIGH knob is responsible for contouring the high
end to the total sound.

TATU LED – This LED indicates the current state of the unit. When the
LED is lit up, the box is in effect mode. When the LED is off, the box is in
TRUE BYPASS mode.
INPUT Jack – This ¼” jack is the audio input to the KNOCKOUT. The input
impedance presented at the Input Jack is 390 kΩ.
OUTPUT Jack – This ¼” jack is the output signal that is sent to your
amplifier, another pedal or to your recording setup.
- OPERATION NOTE -
The KNOCKOUT was designed to work with any Instrument level signal from
any instrument or voice. The simplicity of the setup is brilliant. It is basically
a balancing act, which revolves around the Dry signal. Both the LOW and the
High knobs deal with radical amounts of gain. The Dry signal is like the
mediator between both filters. Each element is critical to the overall sound. It
pays to experiment in you search for the right setup for each situation. You
will come across many interesting textures that you may want to write down
and store for recall.
Remember that there is a value in each pot. The DRY, LOW and HIGH
elements may each be used independently or in any combination. With the
KNOCKOUT, a little adjustment goes a long way.
Power, from the internal 9-volt battery or external battery eliminator, is
activated by plugging into the input. The input cable should be removed
when the unit is not in use to avoid running down the battery.
The optional 9V power supply from Electro-Harmonix is U 96DC-200BI
same as used by Boss ™ & Ibanez™). 9.6 volts/DC 200ma. The barrel
connector on the front of the Knockout is for the 9-volt battery eliminator
capable of delivering a minimum of 50 mA of current at 9VDC. The inner ring
of the 9-volt battery eliminator must be negative, the outer ring positive. The
unit’s battery may be left in or taken out when the eliminator is in use.
- WARRANTY INFORMATION -
Please register online at http://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 office listed below. Customers outside the regions
listed below, please contact EHX Customer Service for information on warranty
repairs at [email protected] or [phone]. USA and Canadian customers:
please obtain a Return Authorization Number RA#) from EHX Customer
Service before returning your product. Include with your returned unit: a written
description of the problem as well as your name, address, telephone number, e-
mail address, and RA#; and a copy of your receipt clearly showing the purchase
date.
United tates & Canada
EHX CUSTOMER SERVICE
ELECTRO-HARMONIX
c/o NEW SENSOR CORP.
55-01 2ND STREET
LONG ISLAND CITY, NY 11101
Tel: [phone]
Email: [email protected]
Europe
JOHN WILLIAMS
ELECTRO-HARMONIX UK
13 CWMDONKIN TERRACE
SWANSEA SA2 0RQ
UNITED KINGDOM
Tel: [phone]
Email: [email protected]
This warranty gives a purchaser specific legal rights. A purchaser may have even
greater rights depending upon the laws of the jurisdiction within which the
product was purchased.
To hear demos on all EHX pedals visit us on the web at www.ehx.com
Email us at [email protected]