IMPORTANT SAFETY PRECAUTIONS
WARNING: When electrical products are used,
basic precautions should be followed, including:
• Read all instructions before using this product.
• Do not use this product near water, for example, near a bathtub, sink, in a wet
basement, near a swimming pool or the like. Prevent the unit from getting wet from
rain, snow, etc…
• Care should be taken so that objects do not fall, and liquids are not spilled into,
the enclosure through the openings.
• This product should be located so that its position or location does not interfere with its
proper ventilation. It is important that the vents on the top, bottom, and sides of the unit are
allowed “to breathe.”
• The iAMP® should be located away from heat sources such as radiators, heat
registers, or other products that produce heat.
• Do not leave the unit in an extremely hot environment (such as inside a car) for
extended periods of time.
• The product should be serviced by qualified personnel when:
-
The power supply cord or the plug has been damaged; or
-
Objects have fallen, or liquid has been spilled into the product; or
-
The product has been exposed to rain or moisture; or
-
The product does not appear to operate normally or exhibits a
marked change in performance; or
-
The product has been dropped, or the enclosure damaged.
WARRANTY SERVICE FORM
1. Complete this form.
2. Include a copy of your Bill of Sale
3.
Pack unit, this form and copy of original bill of sale and ship, insured to:
Euphonic Audio Inc.
10 Brampton Way
Hamilton Square NJ 08690
Name:
Address:
____________________________________________________
Telephone Number: Email:
Purchased at: Date of Purchase:
Model/Serial Number:
Brief Description of Problem:
• The product should be connected to a power supply of the type described in the operating
instructions or as marked.
Return Shipping: COD:
Prepaid Credit Card
• If you live in area prone to frequent lightning strikes (e.g., Florida), as a
precautionary measure, unplug the iAMP® from the AC power source, especially
during severe thunderstorms.
• Do not attempt to service the product yourself. All servicing should be referred to
qualified service personnel at Euphonic Audio, Inc.
• Use of the iAMP® may cause permanent hearing loss. Do not operate for long
periods of time at a high volume level or at a volume level that is uncomfortable,
particularly in a small, enclosed area. If you experience any ringing in the ears or any
suspected hearing loss you should consult an audiologist.
Credit Card Number:
Expiration Date:
If the billing address is not the same as the shipping address, please provide
billing address:
Billing Address: ____________________________________________________
____________________________________________________
IMPORTANT SAFETY PRECAUTIONS
WARRANTY SERVICE FORM
2
3
DOUBLER SPECIFIC FEATURES
The Doubler 2 provides some specific
features designed for the
upright/acoustic player.
Notch Filter:
To help with feedback, the
Doubler has a variable Notch Filter. The
Notch Filter attenuates the signal 15db from 50 to 600K at .05 octaves.
THE NOTCH
FILTER IS ONLY AVAILABE ON CHANNEL 2.
Microphone Input with Phantom Power:
The Doubler has a Low Impedance Micro-
phone input with a phantom power option. The phantom power ON/OFF option is
controlled by a slide switch on the back of the preamp board (see photo). The
phantom power is ON with the switch in the left position, and OFF with the switch
in the right position. This switch is intended to be a set and forget feature. The MIC
ON switch on the front panel will turn a microphone ON and OFF and tell the ISS
circuitry that a microphone is in use.
Phase Control:
The Doubler features an innovative 180 degree sweep able phase
control to adjust the phase between Channel 1 and Channel 2. This control only
works when BOTH Channel 1 and Channel2 inputs are being used.
PLEASE NOTE: If you want to use a single input and switch between 2 different EQ
settings (i.e. clean/solo) you MUST use Channel 2 as your
“Master”
channel
(DOUBLERONLY).
Unique Features of the iAMP® Doubler 2
The phase control can be useful when combining a pickup and a microphone or two
pickups. Anytime two different pickups or a pickup and a microphone are combined
there are phase interactions between the two. This can result with degrees of
cancellation at different frequencies. Typical phase controls can only reverse the
phase at one position. (180 degrees) The variable phase control on the Doubler offers
the flexibility to alter the phase from 0 degrees (fully counterclockwise) to 180 degrees
(fully clockwise). Experimentation is necessary to find the best sound. No two pickup
or microphone sources react the same when combined, but for the first time one is
able to fine tune the
“sweet
spot”.
Please note that changes in the eq settings can
alter the phase relationships also. Bottom-line
—
experiment with the eq and phase
settings to find the best sound.
The Doubler offers a high quality microphone input. This can accommodate any low
impedance dynamic microphone or a condenser microphone that requires phantom
power. (48 volts). The phantom power switch should be in the
“off”
position unless
using a microphone requiring phantom power.
The notch filter on channel 2 is useful in eliminating feedback, especially when using
a microphone. A notch filter attenuates a very narrow frequency range (typically not
wider than one note). To use it, raise the volume on channel 2 until feedback begins
to occur. Then turn on the notch switch and rotate the knob until the feedback is
eliminated
.
TONE SHAPING
The iAMP® Doubler 2 features a simple yet extremely musical, 3 Band EQ. The
elegant design and pristine sound of the 3 band tone shaping of the Doubler allows
for a totally neutral sound when set flat. Each band can add +/- 12dB of gain on each
channel. The low and high are shelving and the mid control is
centered around 600hz on Channel 1 and 800hz on Channel 2.
OUTPUT SECTION
Main Control: Adjusts the level going into the power amplifier section. The iAMP®
Doubler 2 was designed to be exceptionally clean, accurate and versatile. If you want
a
“dirtier”
overdriven-type sound, it is best to use an effects device through the
Effects loop.
Post/Pre EQ:The DI EQ can be set to send either a clean (PRE) or colored (POST)
signal created in the Tone Shaping section. See
“A Loo
k Inside
”
for specific jumper
settings.
Mute Switch: The Mute Switch can be configured to mute the DI and/or the
Effects/Tuner Send in addition to the speaker out. The Mute Switch can be accessed
via the front panel switch or with an optional footswitch.
The red mute LED will illuminate if the Doubler is muted. Please note the amp is muted
at power on.
DI Output Jack: Balanced DI output for sending a balanced signal directly to low
noise studio equipment. The DI can be configured to either Pre (default) or Post EQ.
DOUBLER 2 FEATURES
TONE SHAPING
OUTPUT SECTION
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