This is an Apos Certified product. That means it's refurbished, like new, eligible for our 45-day return policy, carries an Apos Certified One-Year Warranty, and ships from our US facility. Currently, Apos Certified products are only available to customers with a US shipping address. We appreciate your understanding as we aspire to expand our offerings to a broader audience in the future.

16x less distortion than Monoprice*

There’s nothing better than coming home at the end of a long day, collapsing on the couch, and playing a favorite album on a home good home theater system. Unfortunately, subpar equipment can create more frustrations than they soothe. Unshielded circuitry can pick up electronic interference, and cheap components can create unwanted noises like hisses or pops. It’s important to spend money where it counts, and there’s almost nothing more important in a home theater system than an amp. 

Audiophile components 

There’s no shortcut to quality, and when it comes to circuitry SMSL didn’t spare a dime. They chose premium components like amplifier chips that provide massive power output without undue distortion, a dedicated inductor that fully shields the amplifier from electronic interference, and a power system that reduces noise. The specs speak for themselves: 0.003% THD+N and a signal to noise ratio of 96dB. 

Premium inputs 

Unlike other power amps that only provide RCA and 3.5mm inputs, the SA400 is equipped with premium-grade XLR balanced and Bluetooth 5.0 inputs. Run a balanced DAC or stream hi-res Bluetooth codecs to the SA400 without suffering fidelity loss. 

Bass you can feel

Bookshelf or floor speakers can create an enveloping field of sound, but the addition of a subwoofer lets you feel the music on your skin and in your chest. A power bass pre-amp output on the SA400 lets you connect a subwoofer and adjust it from -30 to +10dB. 

Clean power

Amplifiers are quick to brag about their output power, but that massive power means nothing if it brings noise and distortion with it. The SMSL SA400 offers clean, high-quality power at 230 Watts x 2 per channel (4Ω)--more than enough for home theater systems of any caliber. 

Product highlights

• Two digital power amplifier chips
• Massive power output: 230Wx2 (4Ω)
• Audiophile inputs: XLR and Bluetooth 5.0
• Get room-enveloping bass with subwoofer preamp out
• Built to last with aluminum alloy CNC chassis
• Full function remote control
• High-quality power supply
• Protection circuit
• Audiophile audio components

Specs

• Inputs: XLR, RCA, Bluetooth
• THD+N: 0.003%
• SNR: 96dB
• Channel separation: 94dB
• Output power: 230 Watts x 2 (4Ω)/ 110 Watts x 2 (8Ω)
• Power consumption: 50W (normal volume)
• Size: 4.7 x 1.8 x 9.25” (120 x 48 x 235mm)
• Weight: 4.3lbs (1.95kg)

What’s included

• SMSL SA400 Power Amplifier
• Bluetooth antenna
• Power cord
• Remote control

What pairs well 

• SMSL M400 MQA DAC

Featured reviews

"Fast, punchy and alive sounding in SDB mode...great dynamics." -SoundNews

"This is the best class-D I've heard out of any of the amps I've heard, even from the major companies." -Cheap Audio Man

*Monoprice 300-Watt Studio Audio Amplifier