Class D and solid-state stereo amplifiers, many with Bluetooth, compared by chip, power, inputs and the power supply they need.
Ampapa D1 TPA3255 Amplifier with VU Meters — read reviewA TPA3255 amplifier built for 2.1 systems: an adjustable 30-200Hz high-pass keeps bass out of the main speakers, while a full-range PRE-OUT feeds a subwoofer — plus Bluetooth 5.2 and an OLED with 7 VU styles.
Douk Audio G7 2.0/4.0 Channel Digital Amplifier — read reviewA dual-TPA3255 power amplifier delivering up to 300W x 2 or 150W x 4, with two sets of speaker outputs for A/B testing or dual zones, XLR/TRS combo and RCA inputs, and retro blue VU meters.
Douk Audio A100 TPA3255 Power Amplifier 300W — read reviewA TPA3255 power amp with four working modes - stereo or bridged mono, bass or full-range - for driving speakers and subwoofers. Up to 315W in mono from the included 48V/5A supply, with Super Bass and SW-FREQ knobs.
Douk Audio NS-14G PRO TPA3255 Amplifier — read reviewA 2.1-channel amp with two TI TPA3255 chips delivering up to 300W each for left, right and subwoofer, plus QCC304X Bluetooth with aptX/aptX-HD. Dual power sockets and three-sided ventilation keep it running through demanding sessions.
Nobsound NS-13G 2.0 Channel Amplifier 100W+100W — read reviewA straightforward wired mini amp: dual TPA3116D2 chips rated at 100W+100W, stereo RCA input, treble and bass knobs with bypass, and a 19V supply in the box driving 4-8 ohm speakers.
Nobsound NS-20G Bluetooth Headphone Amp 100W+100W — read reviewA two-in-one mini amp: two TPA3116 chips drive 100W x 2 into speakers while a 3.5mm jack handles 15-32 ohm headphones, with Bluetooth 5.0 + DSP reaching 15m and a dynamic volume LED display.
Nobsound M5.1 5.1 Channel Home Theatre Amp — read reviewFront, surround, center and subwoofer channels in one compact box, with Bluetooth 5.0, optical, coaxial, USB and 5.1 RCA inputs for a mini home cinema rig.
Nobsound M10 TPA3255 Bluetooth Amplifier — read reviewA palm-sized TPA3255 amplifier rated up to 300W x 2 for 4-8 ohm speakers, with Bluetooth 5.4 (aptX-HD, aptX-Lossless, LDAC), USB-C and AUX inputs, plus treble and bass knobs.
Nobsound NS-02G PRO Class A Amplifier — read reviewA solid-state single-ended Class A stereo amp Nobsound rates at 30Wx2 (8 ohm) or 42Wx2 (4 ohm), on universal 100-240V power.
Douk Audio A5 PRO TPA3255 Bluetooth Amplifier — read reviewA compact class-D power amp on TI's TPA3255 chip with Bluetooth 5.1, bass and treble knobs and a 500mW headphone output, rated up to 300W x 2 into 4 ohms. A tempered glass panel makes op-amp swaps a quick, tool-light job.
Douk Audio A5 TPA3255 Stereo Amplifier — read reviewA compact class-D power amp with a TPA3255 chip and a tunable 30-200Hz high-pass filter that keeps low-frequency clutter away from small speakers. Rated 300W x 2 at 4 ohms, with a tempered glass panel for quick op-amp rolling.
Douk Audio M1 MAX TPA3255 Power Amplifier — read reviewDouk's $109.99 M1 MAX runs TI's TPA3255 chip with Bluetooth, RCA, and USB-drive input; the datasheet and independent tests show its real power limits.
Douk Audio M1FM TPA3116 Digital Amplifier — read reviewA stereo receiver combining a TPA3116D2 amp (50W x 2 at 4 ohms), Bluetooth 5.1, an FM tuner spanning 76-108MHz and RCA/AUX inputs - all controllable by the included remote. Four pluggable NE5532 op-amps add upgrade potential.
Douk Audio NS-13G MAX Amplifier with Phono — read reviewA compact TPA3255 power amp with a built-in MM phono stage, so a turntable can plug straight in. It ships with a 48V/5A adapter for up to 300W x 2 into 4 ohms, and adds tone/bypass switching plus a swappable op-amp.
Douk Audio ST-01 PLUS TPA3255 Amplifier — read reviewA mini TPA3255 amp with Bluetooth 5.2, an MM phono input for turntables and a dancing analog VU meter. Rated 300W per channel at 4 ohms, with adjustable bass, treble and VU sensitivity in a slim aluminum shell.
Douk Audio M1 PRO Bluetooth Amplifier 160W — read reviewA 160W x 2 desktop amplifier with TDA7498E power, Bluetooth 5.0, RCA and U-disk inputs, tone controls and a low-frequency output for an active subwoofer.
Nobsound NS-10G Bluetooth Amplifier 50W+50W — read reviewA palm-sized TPA3116 amplifier rated 50W x 2 with Bluetooth 5.0, USB and AUX inputs, a dedicated bass boost button, and an aluminum case weighing just 105 grams.
Nobsound NS-15G TPA3116 Amplifier 100W+100W — read reviewA 320g mini amplifier with dual TPA3116D2 chips rated at 100W+100W, Bluetooth 5.0 input reaching 50ft, treble and bass knobs with a tone bypass, all in a CNC-machined aluminum case.
Douk Audio M4 Bluetooth 4-Channel Amp 50W — read reviewA four-channel class-D amp quoted at 50W per channel for multi-room or four-speaker setups, with Bluetooth 5.0, dual RCA and U-disk inputs and per-channel volume.
Nobsound NS-01G MAX Amplifier 100W+100W — read reviewA super-mini TPA3221 amplifier rated up to 100W+100W under a 24V/8A supply, with Bluetooth 5.0 and AUX inputs and a pre-out for subwoofers, active speakers or a second amp.
Nobsound NS-04G PRO Stereo Amplifier 100W x 2 — read reviewA bare-bones stereo power amp with a stereo RCA input and 100W + 100W of TPA3116D2 class-D power into 4-8Ω speakers for $46.99.
Nobsound NS-10G PRO Bluetooth Amplifier DSP — read reviewAn upgraded mini amp built around a TPA3221 chip rated at 100W x 2, with Bluetooth 5.0 + EDR + DSP reaching 15m, a deliberately volume-knob-free circuit path, and gold-plated binding posts.
Nobsound G3 Bluetooth Amplifier with Tone Control — read reviewA 55W x 2 mini amplifier with a TPA3116 chip, Bluetooth 5.0 and RCA inputs, a pre-out for 2.1 setups, and independent bass and treble controls.
Nobsound NS-01G PRO Amplifier 50W x 2 — read reviewA 50W x 2 mini amplifier on the TPA3116 chip with Bluetooth 5.0, USB and 3.5mm AUX inputs, sold in five colours with or without a power supply.
Nobsound NS-06G TPA3116 Class D Amplifier — read reviewA mini Class D amplifier with the TPA3116 chip delivering up to 60W x 2, standard RCA input and banana speaker outputs, and a DC 19V adapter included.
Nobsound NS-14G Bluetooth 2.1 Channel Amplifier — read reviewA compact 2.1-channel TPA3116 power amp with Bluetooth and RCA inputs, a dedicated subwoofer channel, and full tone/subwoofer level controls.
Nobsound Q10 Bluetooth Amplifier 100W — read reviewA palm-sized 116g Class D power amp with a TPA3221 chip rated at 100W per channel, Bluetooth 5.0 plus AUX and optical inputs, and all three cables included. One knob handles power, input switching and volume.
Nobsound TA-21 Bluetooth DSP Amplifier — read reviewA palm-size class-D amp on the TPA3221 chip, quoted at up to 100W per channel with Bluetooth 5.0 DSP, a 3.5mm AUX input and a digital volume display.
Nobsound TONE Mini Bluetooth Stereo Amplifier — read reviewA 50W x 2 mini power amp using the TPA3116 chip with Bluetooth and AUX inputs, an infinite-rotation encoder knob and a compact aluminum build with a DC 19V adapter included.
Douk Audio Amplifier Main Unit Only — read reviewA main-unit-only listing for eight Douk Audio and Nobsound amplifier models - A5, A5 PRO, ST-01 PRO, NS-13G MAX, M1 PRO, M4, NS-14G and NS-14G PRO - power supply not included.