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Owner’s Manual
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IMPORTANT SAFETY INSTRUCTIONS
Liquifier Analog Chorus
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation
openings. Install in accordance
with the manufacturer’s instructions.
8. Do not install near any heat sources
such as radiators, heat registers, stoves,
or other apparatus (including amplifiers)
that produce heat.
9. Do not defeat the safety purpose
of the polarized or grounding-type plug.
A polarized plug has two blades with one
wider than the other. A grounding-type
plug has two blades and a third grounding
prong. The wide blade or the third prong
are provided for your safety. If the provided
plug does not fit into your outlet, consult
an electrician for replacement of the
obsolete outlet.
10. Protect the power cord from being
walked on or pinched particularly at plugs,
convenience receptacles, and the point
where they exit from the apparatus.
11. Only use attachments/accessories
specified by the manufacturer.
12. Use only with a cart,
stand, tripod, bracket, or table
PORTABLE CART
WARNING
specified by the manufacturer,
or sold with the apparatus.
When a cart is used, use
caution when moving the cart/
apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning
storms or when unused for long periods
of time.
14. Refer all servicing to qualified service
personnel. Servicing is required when the
apparatus has been damaged in any way,
such as power-supply cord or plug is
damaged, liquid has been spilled or
objects have fallen into the apparatus,
the apparatus has been exposed to rain
or moisture, does not operate normally,
or has been dropped.
15. This apparatus shall not be exposed
to dripping or splashing, and no object
filled with liquids, such as vases or beer
glasses, shall be placed on the apparatus.
16. Do not overload wall outlets and
extension cords as this can result in
a risk of fire or electric shock.
17. The MAINS plug or an appliance
coupler is used as the disconnect device,
so the disconnect device shall remain
readily operable.
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 the 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.
CAUTION: Changes or modifications to this
device not expressly approved by Yamaha
Guitar Group, Inc. could void the user’s
authority to operate the equipment under
FCC rules.
This apparatus does not exceed the Class
A/Class B (whichever is applicable) limits
for radio noise emissions from digital
apparatus as set out in the radio
interference regulations of the Canadian
Department of Communications.
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Liquifier Analog Chorus
Exposure to extremely high noise levels
may cause permanent hearing loss.
Individuals vary considerably in
susceptibility to noise-induced hearing
loss, but nearly everyone will lose some
hearing if exposed to sufficiently intense
noise for a period of time. The U.S.
Government’s Occupational Safety and
Health Administration (OSHA) has specified
the permissible noise level exposures shown
in the following chart.
According to OSHA, any exposure in excess
of these permissible limits could result
in some hearing loss. To ensure against
potentially dangerous exposure to high
sound pressure levels, it is recommended
that all persons exposed to equipment
capable of producing high sound pressure
levels use hearing protectors while
the equipment is in operation. Ear plugs
or protectors in the ear canals or over
the ears must be worn when operating
the equipment in order to prevent
permanent hearing loss if exposure
is in excess of the limits set forth here:
Duration, per
day in hours
8 90 Duo in small club
6 92
4 95 Subway Train
3 97
2 100 Very loud classical music
1.5 102
1 105 Ryan screaming at Troy about deadlines
0.5 110
0.25 or less 115 Loudest parts at a rock concert
Sound Level
dBA, Slow
Response
Typical Example
RISK OF ELECTRIC SHOCK! DO NOT OPEN!
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.
The lightning flash with arrowhead symbol within
an equilateral triangle means “electric shock hazard”.
It is intended to alert the user to the presence of
uninsulated “dangerous” voltage within the product
enclosure, that may be of significant magnitude to
constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle means
“Warning/Caution!”. It is intended to alert the user of the
presence of important operating and maintaining (servicing)
instructions in the literature accompanying the appliance.
WARNING — To reduce the risk of fire or electric shock,
do not expose this apparatus to rain or moisture.
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan.
Apparatet må tilkoples jordet stikkontakt.
Apparaten skall anslutas till jordat uttag.
CAUTION
Correct disposal of this product: This symbol indicates that this product should not be disposed of with your household
waste, according to the WEEE directive (2012/19/EU) and your national law. This product should be handed over to an authorized
collection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type of waste could
have a possible negative impact on the environment and human health due to potentially hazardous substances that are generally
associated with EEE. At the same time, your cooperation in the correct disposal of this product will contribute to the effective
usage of natural resources. For more information about where you can drop off your waste equipment for recycling, please contact
your local city office, waste authority, or your household waste disposal service.
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Liquifier Analog Chorus
Table of Contents
Important Safety Instructions .................................................. 2-3
Table Of Contents ..................................................................... 4
Introduction.............................................................................. 4
Features ................................................................................... 4
Liquifier Analog Chorus Top Panel Features ................................ 5
Liquifier Analog Chorus Top and Rear Panel Features .................. 6
Liquifier Analog Chorus Bottom Panel Features ........................... 7
Liquifier Analog Chorus Suggested Settings ................................. 8
Liquifier Analog Chorus Block Diagram ..................................... 10
Technical Specifications / Service Information ........................... 11
Introduction
The Ampeg Liquifier Analog Chorus pedal delivers incredibly rich tones thanks
to its dual chorus circuit design.
Experience classic dreamy chorus or turn it all the way up to transport your tone
to a new dimension. Featuring a roadworthy all-metal chassis and true bypass switching,
the Liquifier Analog Chorus delivers all the lush sounds you’ve been dreaming of and
more.
Like all Ampeg products, your Liquifier Analog Chorus pedal is designed
by musicians and built using only the best of components. Each pedal is tested
to confirm that it meets our specifications, and we believe that this pedal is the
absolute best that it can be.
In order to get the most out of your new pedal, please read this manual before
you begin playing. Best of luck in all of your musical endeavors!
And thank you for choosing Ampeg.
Features:
• Dual chorus circuit design delivers incredibly rich chorus tones for both bass & guitar.
• Dial in the perfect sound with Rate, Depth and Effect Level controls.
• True bypass, analog design with incredible signal-to-noise ratio.
• Roadworthy all-metal chassis construction.
• 9V DC supply or battery capable (not included).
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Liquifier Analog Chorus Top Panel Features
LIQUIFIER ANALOG CHORUS:
A chorus effect essentially
copies the original signal, slightly
alters the timing using delay
and combines it with the original
signal.
By adjusting various parameters,
a wide range of effects may
be produced. Just like a chorus
of singers, the combination of
multiple, slightly differing sources
creates blurriness of both pitch
and rhythm that makes the sound
feel “wider” than the original
alone.
When used tastefully, chorus
can add a very melodic presence
to a bass line. It provides a soft,
ethereal sweeping effect that
is useful for thickening and for
making a particular sound pop
out of the mix. It can also be
abused for all kinds of great,
specialized effects!
But here’s what makes the Ampeg
Liquifier Analog Chorus pedal
unique:
Instead of just a single delayed
copy of the original signal,
the Liquifier makes two copies...
and one of those copies is a
polarity-inverted mirror image.
What happens next is that two
separate triangle waves vibrate
the pitch of the copies. These
waves are linked so that as one
copy rises sharply in pitch, the
other wave falls flat by the same
amount. As the pitches crisscross
each other, some high frequencies
cancel each other out in a
“comb-filtering” effect that rises.
When the two copies are matched
exactly in their pitch-shift, they
briefly disappear. This is also
known as “through-zero flanging,”
a rarity in true-analog effects
pedals.
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All three signals – dry + delay
+ polarity-inverted mirror image
– are blended together via the
Effect Level knob. The result is
signal movement that swirls in a
3-dimensional manner.
Now go impress your friends with
this new-found knowledge!
1. INPUT: The signal output from an
instrument (active or passive) may
be connected to this 1/4" input by
means of an unbalanced shielded
instrument cable.
NOTE: Unplug the input cable when
not in use, as the 9V battery will
drain (and eventually die). Details
on replacing the battery may be
found on page 7.
2. LIQUIFIER CHORUS ON/OFF SWITCH:
Engage this switch to activate
the Liquifier Analog Chorus pedal.
This pedal is true bypass meaning
the signal will pass through from
input to output with no circuitry
in between when the switch is
disengaged.
3. ON/OFF LED: This LED illuminates
purple when the pedal is engaged.
Liquifier Analog Chorus
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Liquifier Analog Chorus
Liquifier Analog Chorus Top and Rear Panel Features
8. OUTPUT: Typically, this 1/4" output
jack connects to the input of
an external power amplifier – or
powered loudspeakers, as long as
they have their own input controls
to adjust the volume level – by
means of an unbalanced shielded
instrument cable.
However, it may be connected
to an external mixer, recorder,
or interface. In this way, you
do not have to mic the speaker
cabinet in order to add it to the
main mix, or to record.
9. POWER CONNECTOR: This is where
to connect the optional power
supply.
Before plugging in the power
supply, make sure that you are
using the correct one for your
country (see below).
NOTE: A power supply may be
purchased through your favorite Ampeg
Dealer. Be sure to ask for part number:
2045758-00: United States
2045758-01: Europe
2045758-02: Japan
2045758-03: United Kingdom
2045758-04: Australia
2045758-05: China
2045758-06: Brazil
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4. RATE: Rotate this knob to adjust
the speed of the low-frequency
oscillator (LFO) from minimum
(fully counter-clockwise) to
maximum (fully clockwise).
5. DEPTH: Rotate this knob to
adjust the amplitude of the rate
from minimum intensity (fully
counter-clockwise) to maximum
intensity (fully clockwise).
6. EFFECT LEVEL: Rotate this knob
to adjust the overall effect level
from Dry (no effect, fully
counter-clockwise) to Wet
(100% effect, fully clockwise).
Effect Level examples:
9:00 – The swirling takes a subtle
back seat to the dry signal.
12:00 – With the Effect Level
knob at noon, the signal becomes
a glorious 3-way psychedelic swirl.
5:00 (100% wet) – This results in
pure, through-zero flanging.
7. RATE INDICATION LED: This green
LED flashes to indicate the current
rate.
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BOTTOM PANEL ACCESS
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Liquifier Analog Chorus Bottom Panel Features
Liquifier Analog Chorus
This is where the 9V battery
is housed.
Removing the bottom is easy.
Simply start by placing the pedal
top down on a soft, dry cloth.
Remove each of the four screws
by turning them counter-clockwise.
Be sure to keep them in a safe
place as you will need them again!
10. 9V BATTERY
The Liquifier Analog Chorus pedal
may be powered by 9V battery
instead of using a power supply.
As seen in the illustration below,
it tucks in nicely inside a
compartment of the circuit board
next to the edge of the pedal.
NOTE: Unplug the input cable when
not in use, as the 9V battery will
drain (and eventually die).
10
NOTE: When replacing the
bottom of the pedal, line up
the rectangular foam piece over
the battery. Turn the screws
clockwise to affix to the bottom
to the pedal.
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Liquifier Analog Chorus Suggested Settings
Liquifier Analog Chorus
Believing (Don’t Stop)
Space Invaderz
Nice & Easy
Nice Tremolo
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Liquifier Analog Chorus
Liquifier Analog Chorus Suggested Settings Continued...
Hollow
Inverted
In & Out
Warbly
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Liquifier Analog Chorus Block Diagram
MIXER
CONTROL
EFFECT LEVEL
Liquifier Analog Chorus
OUTPUTINPUT
DRY AUDIO
WET AUDIO
10
DELAY
CLOCKS
DEPTH
CONTROL
RATE
CONTROL
LOW
FREQUENCY
OSCILLATOR
LINES
DELAY
ANALOG
INVERTER
BBD BBD
HI-Z
JFET
HEAVY-DUTY
TRUE-BYPASS SWITCHING PATH
BUFFER
FOOTSWITCH
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Liquifier Analog Chorus
LIQUIFIER ANALOG CHORUS TECHNICAL SPECIFICATIONS
Signal-to-Noise Ratio 82 dB (Effect Level 100% wet)
94 dB (Effect Level 100% dry)
Maximum Gain +0 dB (Unity)
Maximum Input Level 1.1 Vrms (3.0 V peak-peak) before
clipping (1.00% distortion), 100 Hz input
Frequency Response 100 Hz – 5 kHz, ±3.0 dB (100% Wet)
(Input Level 1.00 V peak-peak) 20 Hz – 20 kHz, ±0.5 dB (100% Dry)
Impedances 1 M (Input)
200 (Output)
Power Requirements Internal: 9 V Battery
External: 9 VDC, ≥60 mA
Maximum Current Draw 56 mA at 9VDC
Size (H x W x D) 2.2 in x 2.6 in x 4.5 in
56 mm x 66 mm x 114 mm
Weight 0.6 lb / 0.3 kg (approximately)
All specifications subject to change
Service Information
If you are having a problem with your Liquifier Analog Chorus, you can go to our website
(www.ampeg.com) and click on Support for service information, or call Technical Support
at 1-818-575-3600 Monday-Friday during normal business hours, Pacific Time, to receive
assistance. If you are outside of the U.S., contact your local distributor for technical
support and service.
The Liquifier Analog Chorus is housed in a corrosion resistant die-cast zinc chassis, so be sure
to clean it with a dry lint-free cloth. Never spray cleaning agents on the Liquifier Analog Chorus.
Avoid abrasive cleansers which would damage the finish.
Ampeg continually develops new products and improves upon existing ones. For this reason, the specifications
and information in this manual are subject to change without notice.
“Ampeg” is a registered trademark of Yamaha Guitar Group,inc . All other brand names mentioned are trademarks or
registered trademarks of their respective holders and are hereby acknowledged.
www.ampeg.com
©2018 Yamaha Guitar Group Inc.
26580 Agoura Road • Calabasas, CA 91302-1921
Part No. SW1231 Rev. B 07/18
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Owner’s Manual
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