NUX AC-80 Stageman II Acoustic Amplifier Owner’s Manual

June 6, 2024
NUX

NUX AC-80 Stageman II Acoustic Amplifier
Owner’s Manual

NUX AC 80 Stageman II Acoustic Amplifier

WARNING
To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture.
FCC ID: 2A0AA-AC-80
CAUTION
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. Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate 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. The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure conditions without restriction.

The lightning symbol within a triangle means, “Electrical AZ caution!” It indicates the presence of information about operating voltage and potential risks of electrical shock.
The exclamation point within a triangle means, “Caution!”
Please read the information next to all caution signs.

Introduction

NUX Stageman ll(AC-80) is an upgrade version from Stageman(AC-50) acoustic guitar amplifier. The feature is an analog preamp with nice Core-Image post- effects. For Stageman II, we design specific EQ scenes for fingerstyle and strum style in channel 1. NUX also has a very intelligent acoustic IR application for channel 1, you can engage Acoustic IR by APP. Acoustic IR is the new trend to make your acoustic sound as micing. Stageman II keeps Drum & loop, you can control the function by the original NMP-2 foot controller.

Features

  • 80 watts rich warm sound acoustic amp with 6.5″ premium speaker and 1″ tweeter.
  • 2 independent channels with routing adjustable post-effects.
  • Acoustic impulse response.
  • Battery power for busking application.
  • Drum & Loop(60s phrase loop).
  • Bluetooth audio stream.
  • Free App controller.
  • USB firmware update.

Control Panel

NUX AC 80 Stageman II Acoustic Amplifier - Control
Panel

Rear Panel

NUX AC 80 Stageman II Acoustic Amplifier - Rear Panel

Operation

POWER SWITCH & INDICATOR
­

Toggle the switch to turn on the amp, the indicator will also turn on.
­MASTER knob

Controls the overall level to power amp section.
CHANNEL1
INPUT jack

Connect electric-acoustic guitar with a cable to the 1/4″ INPUT jack.
Ch1 3-WAY TOGGLE SWITCH

You can choose 3 different EQ scenes for channel 1 input.
NOR= Normal means flat EQ
FINGER= Finger Style means a little bit bright
STRUM= Strum Style means strong mid-low end response.
GAIN knob
Controls the input level.
BASS / MIDDLE / TREBLE knobs

NUX AC 80 Stageman II Acoustic Amplifier -BASS 1

These 3 knobs control-related low/ mid / high-end response.

REVERB knob

Controls Reverb MIX level.
EFX knob

Controls related effect MIX, you can choose the effect model through APP.

NUX AC 80 Stageman II Acoustic Amplifier - EFX knob 1

CHANNEL 2

COMBO INPUT jack

You can connect with electric-acoustic guitar or dynamic microphone.

2-WAY TOGGLE SWITCH

You can switch to phase to avoid feedback issues while you use a dual output system.

GAIN knob

Controls the input level.

BASS / MIDDLE / TREBLE knobs

NUX AC 80 Stageman II Acoustic Amplifier -BASS 1

These 3 knobs control-related low/ mid/high-end response.

EFX knob
Controls related effect MIX, you can choose the effect model through APP.
EFX knob

While the amp connects with the mobile device (Bluetooth Audio Stream), the indicator will turn on, and you can hear “bi” from the amp. If there is no connection, the indicator will flash.
For APP connection, please open the STAGE APP, and go to “Settings” to choose “Current Amp” as “Stageman II”. Then click to scan devices, and you will find Stageman II. Click it, it will connect automatically. Since connected, you can tweak all the parameters from your mobile phone.

LOOP INDICATOR

CHARGING & LOW BATTERY INDICATOR

While you connect with the adaptor to charge, the CHARGING indicator will turn on. While it’s full of battery, the CHARGING indicator will turn off. While you use battery power, and the battery runs out of power, the amplifier will turn off. In the meantime, the LOW BATTERY indicator will turn on to remind you low battery status.

DC POWER jack
Please connect with the original power adaptor to power the amp
USB PORT

You can do firmware update through the USB port. Please visit the product page to check firmware update instructions, and download the newest firmware.
AUXIN jack

Connect MP3 player to play backing tracks.
SEND / RETURN jacks
You can connect other effect pedals through send/return jacks.
LINE OUT jack

Connect to mixer or recording interface as you want.
DRUM & LOOP FOOT SWITCH jack

Connecting with NUX NMP-2, you can trigger the TIP(B foot switch) for the LOOP function and trigger the RING(A foot switch) for the DRUM function.
Loop Footswitch
NUX AC 80 Stageman II Acoustic Amplifier - Loop
Footswitch CHANNEL 1 FOOT SWITCH jack

Connecting with NUX NMP-2, you can trigger the TIP(B foot switch) for EFX and trigger the RING(A foot switch) for the REVERB effect.
Note: For the EFX model, you can choose through APP.
DI OUT jack

You can use DI OUT for the balanced signal to interface or PA system.

Signal Diagram

NUX AC 80 Stageman II Acoustic Amplifier - Signal
Diagram

  • Impedance:
    CHANNEL 1: 4.7MQ
    CHANNEL 2: 100kQ
    SEND: .1kQ2
    RETURN: 1MQ2
    AUX-In: 33kQ2

  • Speaker:
    Size: 6.5″ Woofer x 1, 1″ Tweeter
    Frequency Response Range: 50Hz -20kHz(-3dB)

  • Power:
    80 Watt: Power Supply(included: 4A at 28V DC)
    40 Watt: Rechargeable Battery(Built-in)

  • Battery:
    Capacity: 5000mAh
    Battery Charging Time: 6 hours(approx. @current: 1A)

  • Dimensions: 310mm(L) x 280mm(W) x 328mm(H)

  • Weight: 7.5kg
    NOTE: To avoid the built-in Li-battery pseudo-fault, please charge the amplifier once per 3 months.

Accessories: User manual, Power Adapter x 1, Patch Cable x1,
NMP-2 dual footswitch.
Specifications and appearance are subject to change without notice.
©2020 Cherub Technology-All rights reserved. No part of this publication may be reproduced in any form without prior written permission of Cherub Technology.

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