Electro-Harmonix XO OCTAVE MULTIPLEXER User manual

FCC 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 CC 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 CC rules.
OCTAVE MULTIPLEXER
Sub-Octave Generator
The Electro-Harmonix OCTAVE MULTIPLEXER is the result of many years of
engineering research. To get the best results from it please put aside an
hour or two for practice in a quiet room…just you, your guitar and amp, and
the OCTAVE MULTIPLEXER.
The OCTAVE MULTIPLEXER produces a sub-octave note one octave below
the note you play. With two filter controls and a SUB switch, the OCTAVE
MULTIPLEXER allows you to shape the tone of the sub-octave from deep
bass to fuzzy sub-octaves.
-CONTROLS-
HIGH FILTER nob – Adjusts a filter that will shape the tone of the sub-
octave’s higher order harmonics. Turning the HIGH ILTER knob clockwise
will make the sub-octave sound more gnarly and fuzzy.
BASS FILTER nob – Adjusts a filter that will shape the tone of the sub-
octave’s fundamental and lower order harmonics. Turning the BASS ILTER
knob counter-clockwise will make the sub-octave sound deeper and bassier.
PLEASE NOTE: the BASS ILTER knob is only active when the SUB switch is
set to ON.
SUB Switch – Switches the Bass ilter in and out. When SUB is set to ON
the Bass ilter and its corresponding knob are activated. When the SUB
switch is set to O , only the High ilter is active. Turning the SUB switch on
gives the sub-octave a deeper, bassier sound.
BLEND nob – This is a wet/dry knob. Counter-clockwise is 100% dry.
Clockwise is 100% wet.
STATUS LED – When the LED is lit; the Octave Multiplexer effect is active.
When the LED is off, the Octave Multiplexer is in True Bypass Mode. The
footswitch engages/disengages the effect.
INPUT Jack – Connect your instrument to the input jack. The input
impedance presented at the input jack is 1Mohm.

EFFECT OUT Jack – Connect this jack to your amplifier. This is the Octave
Multiplexer’s output.
DRY OUT Jack – This jack is connected directly to the Input Jack. The DRY
OUT jack gives the musician the ability to separately amplify the original
instrument and the sub-octave created by the Octave Multiplexer.
9V Power Jack – The Octave Multiplexer can run off of a 9V battery or you
can connect a 9VDC battery eliminator capable of delivering at least 100mA
to the 9V power jack. The optional 9V power supply from Electro-Harmonix
is US9.6DC-200BI (same as used by Boss™ & Ibanez™) 9.6 volts/DC
200mA. The battery eliminator must have a barrel connector with center
negative. The battery may be left in or taken out when using an eliminator.
-OPERATING INSTRUCTIONS and HINTS-
The Bass ilter emphasizes the lowest fundamental note, and should be used
for bottom string playing. The knob should be set counter-clockwise to get
the deepest sound and the SUB switch turned on. or higher strings the
High ilter is used and the SUB switch is turned off.
The SUB switch should normally be ON when the MULTIPLEXER is used with
a guitar to produce a deep bass sound. When it is O , the unit accepts
much higher notes and inputs from other instruments. Some guitars may
work better with the switch set to O .
Playing technique, The OCTAVE MULTIPLEXER is really a one note device. It
will not operate on chords unless the lowest string is hit much harder than
the others. or this reason, you should keep the silent strings dampened,
particularly when playing rising runs.
Clean triggering, some guitars have body resonance that can over emphasize
certain frequencies. When these coincide with the first overtone of a note
played (an octave above the fundamental), the OCTAVE MULTIPLEXER can
be fooled into triggering the overtone. The result is a yodeling effect. On
most guitars, the rhythm pick-up (nearest to the fingerboard) gives the
strongest fundamental. The tone filter controls should be set to mellow. It
also helps if the strings are played well away from the bridge.
One other cause of dirty triggering is easily remedied – that is the
replacement of worn or dirty strings. Worn strings develop small kinks
where they cannot contact the frets. Those cause the overtones to go
sharp, and results in the sub-octave sound glitching in the middle of a
sustained note.
- POWER -
Power from the internal 9-volt battery is activated by plugging into the
INPUT jack. The input cable should be removed when the unit is not in use
to avoid running down the battery. If a battery eliminator is used, the Octave
Multiplexer will be powered as long as a wall-wart is plugged into the wall.
To change the 9-volt battery, you must remove the 4 screws on the bottom
of the Octave Multiplexer. Once the screws are removed, you can take off
the bottom plate and change the battery. Please do not touch the circuit
board while the bottom plate is off or you risk damaging a component.
- 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]m 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 States & Canada
EHX CUSTOMER SERVICE
ELECTRO-HARMONIX
c/o NEW SENSOR CORP.
55-01 2ND STREET
LONG ISLAND CITY, NY 11101
Tel: [phone]
Email: [e-mail]
Europe
JOHN WILLIAMS
ELECTRO-HARMONIX UK
13 CWMDONKIN TERRACE
SWANSEA SA2 0RQ
UNITED KINGDOM
Tel: [phone]
Email: [e-mail]
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 i[email protected]