Douk Audio Nobsound G2 Subwoofer Amplifier 100W Mono

The Nobsound G2 is designed for users who want a small-footprint amplifier that can serve either as a dedicated subwoofer amp or as a mono channel driver. With a dedicated mode switch, selectable gain levels, low-pass filtering and speaker protection, it aims to add low-frequency authority to a home theater or drive one channel cleanly in bridged configurations. The unit ships with a 19V 4.74A external supply and uses TI and NE op-amp components for stable performance.

How do I use the G2 as a subwoofer amplifier?

Switch the G2 into SUB mode to enable its low-pass filter and bass controls, then connect a passive subwoofer to the speaker terminals. The onboard cutoff knob tailors the crossover point so the sub receives only low frequencies, while gain settings match the sub’s sensitivity.

• Set mode switch to SUB to enable bass filtering.
• Adjust cutoff frequency knob to blend with main speakers.
• Choose gain (20/26/32/36 dB) to align output with your system.
• Use the 19V/4.74A supply for stable 100W peak output.

Can the G2 drive a single full-range speaker or be bridged for more power?

Yes — in PBTL/BTL mode the amplifier operates as a mono bridge, suitable for driving a single channel with higher voltage swing compared with standard stereo units. Two G2 units can be paired to handle left and right channels independently, eliminating cross-talk between channels.

• Flip to PBTL/BTL mode for bridged mono operation.
• Pair two units for separate left and right channels with no interference.
• Built-in speaker protection reduces risk of damage under load.

What controls and settings are available to tune the sound?

The G2 offers a four-position gain switch and a continuous bass cutoff control so you can match signal level and crossover to your speakers and room acoustics. These controls help preserve signal clarity while avoiding unnecessary attenuation from inline resistors.

• Gain selector with 20, 26, 32 and 36 dB options for level matching.
• Variable low-pass cutoff knob for precise bass integration.
• NE5532 op-amp and TI TPA3116 stage for noise reduction and stable output.

How reliable is the G2 for home theater use?

The G2 includes speaker protection circuitry, a low-pass filter tailored for sub use, and an external high-quality power supply to maintain steady performance. Its compact chassis makes it easy to fit into AV racks or tight cabinet spaces while minimizing audible background noise.

• Speaker protection circuit helps safeguard connected drivers.
• Optimized PCB layout reduces hum and background noise.
• External 19V/4.74A adapter ensures consistent power delivery.

Who is this for: The Douk Audio Nobsound G2 is aimed at home theater enthusiasts, DIY audio builders and small-room listeners who need a compact, flexible mono amplifier. It suits owners of passive subwoofers who want a dedicated sub amp, or anyone seeking a bridged mono solution for a single high-power channel. If you want simple controls for crossover and gain, a small form factor, and the option to scale to stereo by adding a second unit, the G2 is a practical choice.