Nobsound NS-13G - User Manual

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NS-13G NS-15G

NS-15G PRO

1. Optional default 19V power supply enough to drive most home

speakers. If you buy the version without power supply or want

higher output, please prepare high-quality power supply by

yourself. Powered by 24V/8A power supply(4Ω load), the actual

output power can reach 100W per channel.

2. Before turning on the amp, please make sure the volume knob

at the leftmost end (power off) avoid high volume ( high output

power ) damaging your speakers.

3. Noise may be caused by poor audio cables, sound sources,

speakers, speaker cables, interference sources, poor contacts

and the device itself. How to determine the reason:

1) remove all input cables and make sure no interference

sources around such as routers;

2) connect the amp to speakers;

3) connect the amp to power supply correctly and turn on the

amp;

4) if noise exists, then problem may be the amp, power supply,

speakers or speaker cables. Please use another speaker,

speaker cables or power supply to check one by one for

Mini NS-13G/NS-15G/

NS-15G PRO Digital Amplifier

WARM TIPS

PARAMETERS

Paramerter/Model

Audio input

Audio output

Number of channel

Max output power

Power amp chip

Op amp

Bluetooth Chip

Decoding chip

Treble and bass range

Speaker impedance

Matched loudspeakers

SNR

THD

Input sensitivity

Frequency response

Working voltage

Default power supply (optoinal)

Color

Dimensions(L*W*H)

Net weight

Banana speaker jacks

2.0

100W+100W

TPA3116*2

TL072

±10dB

4-8Ω

3-10 inch 10-200W

≥98dB

<0.01%(1KHz)

1.1V

18Hz-25kHz

DC 12V-24V (5.5mm / 2.5mm)

19V/4.74A

Stereo L/R RCA

Bluetooth / Stereo L/R RCA

5.0 Version

QCC3034

- -

ES9018K2M

Red Black

Black / Blue

82*108*27mm

92*108*30mm

260g / 0.57lb

320g / 0.71lb

further determination;

5) if no noise, please use other audio cables or audio sources

for further determination.

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Summary

This document describes the Nobsound Mini NS-13G/NS-15G/NS-15G PRO Digital Amplifier, a compact audio amplifier designed for home use. It offers both wired and wireless input options, allowing users to connect various audio sources to passive speakers.

Function Description

The Nobsound Mini Digital Amplifier serves as a central hub for your home audio setup, amplifying audio signals from various sources to power passive speakers. It is designed to deliver clear and powerful sound, with specific models offering additional features like Bluetooth connectivity. The amplifier's core function is to take a low-level audio signal and increase its power sufficiently to drive loudspeakers, making it suitable for a wide range of home audio applications, from casual listening to more demanding setups.

Usage Features

Powering the Amplifier: The amplifier can be powered by a default 19V power supply, which is generally sufficient for most home speakers. For users seeking higher output, it is recommended to prepare a high-quality power supply, such as a 24V/8A supply, which can enable the amplifier to reach an actual output power of 100W per channel when driving a 4Ω load. This flexibility in power supply allows users to tailor the amplifier's performance to their specific speaker requirements and desired volume levels.

Initial Setup and Safety: Before powering on the amplifier, it is crucial to ensure that the volume knob is set to the leftmost end, effectively turning the power off. This precaution prevents high volume or high output power from potentially damaging your speakers upon startup. Once the power adapter is connected to the amp and then plugged into a socket, and passive speakers are properly connected to the amp's output, the device is ready for use.

Wired Input (RCA): For wired connections, the amplifier supports RCA input. Users can connect audio devices such as TVs, CD players, or other sources using a high-quality RCA cable. After connecting, rotating the power/volume knob clockwise will turn on the amplifier, and the power indicator will illuminate steadily in red, indicating that the device is operational.

Wireless Input (Bluetooth - NS-15G / NS-15G PRO versions only): The NS-15G and NS-15G PRO versions of the amplifier offer Bluetooth wireless input. To use this feature, rotate the power/volume knob clockwise to turn on the amplifier, and ensure the power indicator is steady red. Then, toggle the input switch to the "BT" position. Users can then search for the amplifier's Bluetooth signal on their phone or other Bluetooth-enabled device and click to connect. A successful connection will enable wireless audio streaming to the amplifier.

Volume and Tone Control: Once connected and powered on, users can rotate the volume knob to adjust the overall listening level. Additionally, the amplifier features treble and bass knobs, allowing for fine-tuning of the audio to suit personal preferences and the characteristics of the music being played. For those who prefer the original, uncolored sound, rotating the treble knob to its leftmost end will activate a bypass function, delivering the audio without any tone adjustments.

Maintenance Features

Troubleshooting Noise Issues: The manual provides a comprehensive guide for troubleshooting potential noise issues, which can arise from various sources such as poor audio cables, sound sources, speakers, speaker cables, interference sources, poor contacts, or even the device itself. The recommended troubleshooting steps are:

Isolate the amplifier: Begin by removing all input cables and ensuring there are no nearby interference sources, such as routers, which can emit electromagnetic interference.
Connect speakers: Connect only the amplifier to the speakers.
Connect power and turn on: Connect the amplifier to its power supply correctly and turn it on.
Check for noise: If noise persists at this stage, the problem may lie with the amplifier, power supply, speakers, or speaker cables. To further pinpoint the issue, users should systematically test with another speaker, speaker cables, or power supply, checking each component one by one.
Reintroduce audio sources: If no noise is present after the above steps, then the issue likely stems from the audio cables or audio sources. Users should then test with different audio cables or audio sources to identify the problematic component.

These systematic troubleshooting steps help users effectively diagnose and resolve common audio issues, ensuring optimal performance and longevity of the amplifier and connected components.