Nobsound NS-14G - User Manual

1. Before turning on the amp, please make sure the volume knob
at the leftmost end, avoid high volume ( high output power )
damaging your speakers.
2. Default OPTIONAL 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 power supply(4Ω load), the actual
output power can reach 100W per channel.
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
further determination;
5) if no noise, please use other audio cables or audio sources
for further determination.
NS-14G / NS-14G BT5.0 / NS-14G PRO
2.1 Channel Stereo DigitalPower Amplifier 100W+100W
NOTICE
1 2
PARAMETERS
Model
Audio input
Audio output
Number of channel
Max output power
Power amp chip
Op amp
Bluetooth chip
Decoding chip
Speaker impedance
Matched L/R Speakers
Matched subwoofer
SNR
THD
Frequency response
Input sensitivity
Default power supply (optional)
Working voltage
Dimensions(W*D*H)
Net weight
Package weight
Banana speaker jacks
2.1
50W*2(L/R channel)+100W(subwoofer)
TPA3116×2
4Ω-8Ω
3-10 inch 10-200W
5-10 inch 30-150W
≥ 118dB
≤ 0.01% (1KHz)
20Hz-20kHz (±1dB)
≤ 280mV
19V
DC 12V-25V (5.5mm / 2.5mm)
100*185*36mm / 3.94*7.28*1.42in
500g / 1.10lb
700g / 1.54lb
L/R RCA
NS-14G
TL072×3 TL072×4TL072×4
NS-14G BT5.0
NS-14G PRO
BT / L/R RCABT / L/R RCA
QCC30345.0 Version
ES9018K2M

Summary

Product Overview and Specifications

Essential Operation and Safety Guidelines

Crucial notices on volume control, power supply selection, and initial setup to prevent damage.

Troubleshooting Audio Noise

A systematic approach to diagnose and resolve audio noise issues by checking cables, connections, and components.

Detailed Technical Parameters

Comprehensive specifications including model, audio inputs/outputs, power ratings, impedance, SNR, THD, and dimensions.

Usage Instructions and Support

Connecting and Initial Setup Guide

Step-by-step instructions for connecting power adapters, speakers, and audio sources for wired and wireless inputs.

Input Mode Switching and Audio Adjustment

Guidance on switching between RCA and Bluetooth inputs and adjusting volume, bass, and treble for optimal sound.

Contact and Company Information

Physical address, contact person, telephone number, and email for customer support and inquiries.

Overview

1. Function Description
2. Usage Features
3. Initial Setup and Power
4. Connecting Speakers and Subwoofers
5. Wired Input (L/R RCA)
6. Wireless Input (Bluetooth - for NS-14G BT5.0 / NS-14G PRO Versions)
7. Input Switching (for NS-14G BT5.0 / NS-14G PRO Versions)
8. Audio Control and Customization
9. Power Supply Considerations
10. Maintenance Features
11. Addressing Noise Issues
12. General Care

The Nobsound NS-14G, NS-14G BT5.0, and NS-14G PRO are versatile 2.1 channel stereo digital power amplifiers designed to enhance your audio experience. These amplifiers are capable of delivering a robust output, making them suitable for driving a variety of home speakers and subwoofers. With their compact design and user-friendly interface, they offer a convenient solution for both wired and wireless audio setups.

Function Description

At its core, this device functions as a power amplifier, taking audio signals from various sources and amplifying them to drive passive speakers and subwoofers. It supports a 2.1 channel configuration, meaning it can power two main (left and right) speakers and one subwoofer, providing a full-range audio experience with enhanced bass.

The amplifier offers multiple input options to accommodate different audio sources. For wired connections, it features L/R RCA inputs, allowing you to connect devices such as TVs, CD players, PCs, Macs, Echo Dots, or turntables. This ensures compatibility with a wide array of existing audio equipment.

For those who prefer a wireless setup, the NS-14G BT5.0 and NS-14G PRO versions incorporate Bluetooth connectivity. This feature enables seamless streaming of audio from Bluetooth-enabled devices like smartphones and tablets, offering flexibility and convenience by eliminating the need for physical cables between your source device and the amplifier. The Bluetooth chip used in these versions ensures a stable and high-quality wireless connection.

The amplifier's output is designed to connect to passive speakers and subwoofers via banana speaker jacks, a common and reliable connection method in audio systems. This allows users to pair the amplifier with their preferred speakers, offering customization in their sound system.

Usage Features

Operating the Nobsound amplifier is straightforward, with a focus on user convenience and sound customization.

Initial Setup and Power:

Before powering on the amplifier, it is crucial to ensure the volume knob is set to its leftmost (minimum) position. This precaution helps prevent potential damage to your speakers from sudden high-volume output. Once the volume is set, connect the power adapter to the amplifier first, and then plug the power cord into a wall socket. This sequence ensures a safe and proper power-up.

Connecting Speakers and Subwoofers:

After powering up, connect your passive left and right speakers and your subwoofer to the amplifier's output terminals. The banana speaker jacks provide a secure connection for your audio components.

Wired Input (L/R RCA):

To use a wired audio source, rotate the main volume knob from the leftmost end. The power indicator will illuminate steadily, signaling that the amplifier is ready. Then, connect your audio device (e.g., TV, CD player) to the amplifier's L/R RCA input using a high-quality stereo RCA cable.

Wireless Input (Bluetooth - for NS-14G BT5.0 / NS-14G PRO Versions):

For wireless operation, ensure the main volume knob is at its leftmost position and the power indicator is steady. On your Bluetooth-enabled device (e.g., smartphone), search for the amplifier's Bluetooth signal and connect to it.

Input Switching (for NS-14G BT5.0 / NS-14G PRO Versions):

If you have one of the Bluetooth-enabled versions, you can easily switch between RCA input and Bluetooth input. A short press of the main volume knob will toggle between the two modes: a red indicator light signifies RCA input, while a blue indicator light indicates Bluetooth input.

Audio Control and Customization:

The amplifier provides comprehensive controls for fine-tuning your audio output:

• Main Volume Knob: This knob controls the overall output volume for all channels.
• Bass Volume Knob: Allows you to adjust the intensity of the bass output from the subwoofer.
• Bass Frequency Knob: This control lets you set the crossover frequency for the subwoofer, determining which low frequencies are sent to the subwoofer.
• Treble Knob: Adjusts the high-frequency response of the main speakers, allowing you to brighten or mellow the sound.
• Bass Knob (for L/R Channel): This control specifically adjusts the bass output for the left and right main speakers, separate from the subwoofer's bass control.

By utilizing these controls, you can tailor the sound to your personal preferences and optimize it for different types of music or media, ensuring a more delicate and enjoyable listening experience.

Power Supply Considerations:

The amplifier is designed to be flexible with its power supply. While a default 19V power supply is typically sufficient for most home speakers, users seeking higher output can opt for a 24V power supply. When powered by a 24V supply with a 4Ω load, the amplifier can achieve its maximum rated output power per channel. If you purchase the version without a power supply or desire enhanced performance, it is recommended to use a high-quality power supply to ensure optimal operation.

Maintenance Features

Maintaining the Nobsound amplifier involves understanding potential issues and implementing simple troubleshooting steps to ensure consistent performance and longevity.

Addressing Noise Issues:

Noise in an audio system can stem from various sources, including poor audio cables, sound sources, speakers, speaker cables, interference, poor contacts, or even the device itself. To diagnose and resolve noise:

1. Isolate the Amplifier: Begin by disconnecting all input cables from the amplifier. Ensure there are no potential interference sources nearby, such as Wi-Fi routers, which can emit electromagnetic interference.
2. Connect Speakers and Power: Connect the amplifier to your speakers and then correctly connect the power supply. Turn on the amplifier.
3. Check for Noise: If noise is present at this stage (with no input cables connected), the issue likely lies with the amplifier, its power supply, the speakers, or the speaker cables.
4. Systematic Troubleshooting: To pinpoint the exact cause, systematically swap out components:
   • Try a different set of speakers.
   • Use different speaker cables.
   • Test with an alternative power supply. By replacing one component at a time, you can identify which part is introducing the noise.
5. Test Input Cables and Sources: If no noise is detected after the above steps, the problem may be with your audio cables or audio sources. Connect different audio cables and test with various audio sources to determine if they are the cause of the noise. Using high-quality audio cables is always recommended to minimize interference and ensure clear sound transmission.

General Care:

• Ventilation: Ensure the amplifier is placed in a location with adequate ventilation to prevent overheating, which can affect performance and lifespan.
• Cleanliness: Keep the amplifier free from dust and debris. Use a soft, dry cloth for cleaning. Avoid using liquid cleaners directly on the device.
• Connection Integrity: Periodically check all cable connections (power, input, output) to ensure they are secure and free from corrosion. Loose or corroded connections can lead to signal degradation or intermittent issues.
• Power Down Safely: When not in use for extended periods, it is advisable to disconnect the amplifier from the power outlet.

By following these usage and maintenance guidelines, you can ensure your Nobsound NS-14G series amplifier provides a reliable and high-quality audio experience for years to come.

Nobsound NS-14G Specifications

General

Frequency Response	20Hz-20kHz
Output Impedance	4-8Ω
Power Supply	DC 24V
Chipset	TPA3116D2
SNR	≥ 98dB
Input Mode	RCA
Output Power	50W per channel
Input Impedance	47kΩ
Impedance	4-8Ω
THD	0.1%