The SMSL AD18 is a compact Class D stereo amplifier with a built-in DAC, rated 80W x 2 into 4Ω, with USB, two optical, coaxial, AUX and Bluetooth 4.2 (aptX) inputs, a 3.5mm headphone jack and a subwoofer output. It suits small desks and bookshelf-speaker setups that run a computer, TV and phone through one box.
Who the SMSL AD18 is for
Small desks: The aluminum case is 51mm wide and 85mm tall, and a TI TAS5508C + TAS5342A amplifier stage drives passive speakers at 80W x 2 into 4Ω.
Computer and TV audio: USB plays 24-bit audio up to 96kHz, and the two optical inputs and the coaxial input accept 44.1–192kHz.
Phone streaming: Bluetooth 4.2 supports aptX, and NFC lets an NFC-equipped phone pair with a tap.
Headphone listening: A separate headphone amp circuit drives the front 3.5mm jack with 53mW into 32Ω.
Skip it if: you use high-impedance headphones or want USB above 96kHz; the headphone output is rated 11mW into 150Ω and USB tops out at 24-bit/96kHz.
SMSL AD18 key specs
Amplifier: TI TAS5508C + TAS5342A, Class D
Output power: 80W x 2 (4Ω)
Inputs: USB, Toslink optical, 3.5mm combo jack (mini-optical or coaxial), AUX, Bluetooth 4.2 with aptX and NFC
Outputs: Speaker terminals; 3.5mm headphone jack (53mW at 32Ω, 26mW at 64Ω, 11mW at 150Ω); subwoofer out on the 3.5mm combo jack
Sample rates: USB 24-bit, 44.1–96kHz; optical and coaxial 44.1–192kHz
In the box: 24V power adapter, remote control, Bluetooth antenna, micro-USB cable
Size, weight and finish: 51 × 85 × 172mm (W × H × D); 572g; black
Genuine SMSL stock. Free shipping on every order, 45-day returns.
SMSL AD18 vs similar options
vs SMSL PA40: Adds a built-in power supply at the same price but takes only a line-level source; pick the AD18 for its built-in DAC with USB, optical, coaxial and aptX Bluetooth inputs.
vs SMSL A200: Moves up to Bluetooth 5.0 (the AD18 has 4.2) for $25 more; pick the AD18 to save money in a case just 51mm wide.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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