Donner EMO-AMP Controller

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Are you still worrying about your

neighbors’ complaints when you’re

rocking loud at home? Try this EMO-

AMP Controller! This tiny passive

attenuator is designed for connecting to

your amp’s FX Loop jacks: get

connected, set a level and done.

Introduction

Overview

Owner’s Manual

Precautions

READ CAREFULLY BEFORE

PROCEEDING

Please keep this manual in a convenient

place for future reference.

Power Supply

Always use a DC 9V center negative AC

adapter. Use of an adapter other than

that speciﬁed could damage the unit or

cause malfunction and pose a safety

hazard.

Always connect the AC adapter to an

AC outlet that supplies the rated voltage

required by the adapter.

Disconnect the AC adapter from the AC

outlet when during lightning storms or

not using the unit for an extended

period.

Connections

Always turn off the power before

connecting or disconnecting. Make sure

to disconnect all cables and AC adapter

before moving the unit. This will help

prevent malfunction and damages.

Environment Considerations

Avoid using the unit in any of the

following conditions that could cause

malfunction:

●Extremely hot or cold places

●Under direct sunlight

●Magnetic ﬁelds

●Near heaters and other heat sources

●Sandy or dusty places

●Places that are extremely humid or

exposed to splashing water

●Places with lots of vibrations

Electrical Interference

Devices that are very susceptible to

interference or that emits powerful

electromagnetic waves (e.g. radios and

TVs) should not be placed near this unit,

as interference could occur.

Electromagnetic interference could

cause malfunction and could corrupt or

destroy data.

Always operate this unit at a suitable

distance from these devices.

Handling

Do not apply excessive force to the

switches and other controls, exposing

the unit to strong impacts, which could

cause it to break.

Do not put foreign objects or liquids into

the unit.

Never open the case or attempt to

modify the product in any way since this

can result in damage to the unit.

Clean only with a soft, dry cloth.

●Rock Out At Low Volume

The EMO-AMP Controller is a passive

attenuator designed for using with your

amp’s FX Loop jacks (better settle it in a

serial FX loop). When you need to rock

out at low volume, this will be a great

help. But remember: do not set it

between your amp and cabinet.

Need help?

Do you have a question about the Donner EMO-AMP Controller and is the answer not in the manual?

Summary

Precautions

Power Supply

Use a DC 9V center negative AC adapter. Incorrect adapter can cause damage or hazard.

Connections

Turn off power before connecting/disconnecting. Disconnect all cables before moving the unit to prevent damage.

Environment Considerations

Avoid extreme hot/cold, direct sun, magnetic fields, heat sources, dust, humidity, or vibrations.

Electrical Interference

Keep unit away from devices emitting strong electromagnetic waves to prevent interference.

Handling

Avoid excessive force, impacts, foreign objects, liquids, or opening the case. Clean with a dry cloth.

Overview

Rock Out At Low Volume

Passive attenuator for low-volume playing via amp's FX Loop. Do not place between amp and cabinet.

Connections & Controls

DC IN POWER JACK

Supplies power to the LED only. Requires 9-volt DC regulated AC adapter.

LEVEL KNOB

Controls the output level of the EMO-AMP Controller.

RETURN JACK

1/4" mono audio jack for connecting to amp's FX loop send.

MINIMUM FOOTSWITCH AND LED

Tapping sets output to minimum; LED indicates status. Recommended for serial FX loops.

SEND JACK

1/4" mono audio jack for connecting to amp's FX loop return.

The Donner EMO-AMP Controller is a compact, passive attenuator designed to help guitarists achieve low-volume rock sounds without disturbing others. It connects to an amplifier's FX Loop jacks, ideally a serial FX loop, to control the output level.

Function Description:

The primary function of the EMO-AMP Controller is to attenuate the signal in an amplifier's FX loop, allowing the user to "rock out at low volume." It acts as a passive attenuator, meaning it does not require an external power supply for its core function of signal attenuation. The device features true bypass design, which ensures that the original sound quality remains pristine when the attenuator is not actively engaged or when bypassed. A key feature is the "MINIMUM" footswitch, which, when tapped, immediately sets the amplifier's output to its minimum level. An LED indicator illuminates when this minimum level is active, providing visual feedback to the user. The unit is explicitly designed for use within an amp's FX loop and should not be placed between an amp and its cabinet.

Important Technical Specifications:

Power Requirement: 9V DC center negative (for LED only)
Current Consumption: 10mA (for LED only)
Dimensions: 42x93.5x52mm
Weight: 220g
Input/Output Jacks: 1/4" mono audio jacks for "Send" and "Return" connections.
Power Jack: DC 9V center negative (for LED only, 500mA recommended for AC adapter).

Usage Features:

Easy-to-Use: The device is designed for straightforward operation. Users connect it to their amp's FX Loop jacks, set the desired level using the "LEVEL" knob, or tap the "MINIMUM" footswitch for immediate minimum output.
Passive Attenuation: The core attenuation function does not require an external power supply, making it convenient and reducing cable clutter.
True Bypass: Ensures that the signal path remains unaltered when the attenuator is bypassed, preserving the amplifier's original tone.
MINIMUM Footswitch with LED: Provides a quick and easy way to drop the volume to its lowest setting, with a visual LED indicator for confirmation.
Compact Size: Its small dimensions make it easy to integrate into any pedalboard or setup.
Durable Construction: Built with a solid Aluminum-alloy chassis and carefully selected components to ensure reliability and sound quality.

Maintenance Features:

Cleaning: The unit should only be cleaned with a soft, dry cloth.
No User Serviceable Parts: Users are explicitly warned not to open the case or attempt to modify the product, as this can lead to damage and void any potential warranty.
Environmental Considerations: To prevent malfunction, the device should be kept away from extreme temperatures (hot or cold), direct sunlight, magnetic fields, heaters, sandy or dusty places, areas with high humidity or splashing water, and places with excessive vibrations.
Power Supply Handling: If using the optional DC 9V adapter for the LED, always use the specified center negative type. Disconnect the adapter during lightning storms or when the unit is not in use for extended periods.
Connection Protocol: Always turn off the power of connected equipment before making or breaking connections. Disconnect all cables and the AC adapter before moving the unit to prevent malfunction and damage.
Handling Precautions: Avoid applying excessive force to switches and controls, exposing the unit to strong impacts, or introducing foreign objects or liquids into the unit.

The Donner EMO-AMP Controller is a practical solution for guitarists who want to enjoy their amplifier's tone at lower volumes without compromising sound quality, offering a simple yet effective way to manage output levels in home or studio environments.