Nobsound G2 PRO Hi-Fi 300W Subwoofer Audio Mono Channel Class D Power Amplifier-Complete Features/User Guide

Nobsound G2 PRO Hi-Fi 300W Subwoofer Audio Mono Channel Class D Power

Amplifier

Specifications

• DIMENSIONS: L257W215H65MM
• WEIGHT: 5kG
• POWER: 300W
• FREQUENCY: 20Hz-20kHz
• IMPEDANCE: 4 – 8 ohm
• WORKING VOLTAGE: DC 24-35V
• SNR : >= 106Db
• INPUT SENSITIVITY: 775 V
• BASS CUTOFF FREQUENCY RANGE ADJUSTMENT: 40-300Hz
• SLOPE OF BASS ATTENUATION: -12 dB

Introduction

The Nobsound G2 pro is a powerful and hi-fi 300W subwoofer audio mono channel class D power amplifier.  It comes with a PBTL/SUB switch. It is convenient to be used as a full frequency amplifier or subwoofer amplifier. This amplifier has the ability to connect to both passive and active subwoofers. Two of these amplifiers can be used to drive left and right channels independently such as to avoid mutual interference.

The Nobsound G2 Pro amplifier has the ability to provide a maximum output power of 300W. It uses a TPA3255D2 chip and is equipped with a large power supply having a rating of 32V/5A. Such large power is enough to drive passive speakers or subwoofers of power 320W. This power amplifier can also work with outdoor bookshelf, computer, desktop, ceiling, and floor standing speakers.

It features a gain switch which allows 2 levels of output setting and also SUB frequency adjustment. It also features a built-in speaker protection circuit as well as low-pass filter which makes sure that there is no audible noise even at high power.

What’s in the Box

Nobsound G2 Pro Connections
You will find the connection ports at the backside of the amplifier.

Audio In
 You can connect your phone, MP3, TV/Blue-ray, CD-Media players, PC, Mac, computer, etc. at this port.

Sub-out
 Connect the Active subwoofer to this port.

Speaker Out
 This port is to connect the Passive speaker and passive subwoofer.

DC24V-35V
 This port is to connect the provided power supply.

FREQUENTLY ASKED QUESTIONS

• The amplifier comes with a 32v/5a power supply (160w) yet you claim a max power output of 300w; how do you produce more power out than is supplied?
  120 watts to an 8-ohm load, 150 watts to a 2-ohm load, or 200 watts RMS into a 4-ohm load (assuming you have a beefy enough power supply feeding the unit – up to 48V power supply can be used). Not RMS, but max power, is 300 watts. These power values cannot be attained with the included 32V power supply; however, the amplifier may sound better and survive longer.

• It works for a 12″ 450rms car subwoofer with dual 4 Ohms?
  Yes, it works with a 12” 450 RMS car subwoofer with dual 4 ohms.

• Do I need a crossover for the passive subwoofer if I connect it to the amp’s speaker output? is the sub-cut-off of amp only pertain to sub output only?
  Either full range (PBTL) or low pass mode is available on the G2. Low pass mode includes an adjustable high-frequency cutoff with a 12 dB/octave slope and is used for passive subwoofers. The highest cutoff frequency point does not appear to be specified; however, it seems to me that it falls between 40 and 200 Hz.

• Will this work with ULF Frequencies <20hz? i need this for bass shakers that respond as low as 5hz.
  No, this will not work with ULF frequencies lower than 20 Hz.

• If I connect a passive subwoofer (without crossover) to the amp’s speaker output, do I set it to PBTL? Will I be able to use sub cut off knob?
  If the passive subwoofer is used, choose the sub-mode.

• I have a FOSI 2.1-amp 50 x 2 + 100w sub. My passive sub is 300w. Do I need this sub amp?
  This 300W Sub Amp will drive your passive subwoofer better.

• What is the size of the DC barrel connector on the included power supply?
  The size of the DC barrel connector of the included power supply is a standard 5.5 mm barrel which is 10mm long.

• Can this device be used to connect a bass shaker?
  Yes, it can be used to connect a bass shaker.

• Can I use a 48V 10A power supply without damaging the unit?
  The power port has a rating of 24-35V. 48V is really high for it and will burn the device.

• Does the power switch automatically?
  No, the power will not switch automatically.

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