The SMSL DO300 ranks #5 out of 55 total DACs for sound quality. See all Headphone Amps and DACs rankings for every top pick.
Brand: SMSL
Prices on this page were last checked October 12, 2026 at 4:13 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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#5 SMSL DO300 Discontinued eBay
Pros: Audio Science Review measured a SINAD of 123 dB, so its noise and distortion are inaudible and it is fully transparent. Inputs cover USB, optical, coaxial, AES/EBU, I2S over HDMI and Bluetooth 5.0 with LDAC, aptX HD and AAC, with RCA and balanced XLR outputs for powered monitors or an amp.
Cons: It is no longer sold new, so the SMSL D400ES or Topping D70 Pro SABRE are the current picks at the same rating and SINAD. It is a DAC only, with no headphone output, and at 1.2 kg it is a full size desktop box.
| Released | 2023 (3 years ago) |
|---|---|
| Balanced Output | Yes (XLR line out) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC |
| DAC Chip | ESS ES9039MSPRO |
| Device Type | DAC |
| Dimensions | 8.3” x 1.7” x 7.3” (210 x 43 x 185 mm) |
| Inputs | USB-B, optical, coaxial, AES/EBU, I2S (HDMI), Bluetooth 5.0 |
| Outputs | RCA, XLR |
| SINAD | 123 dB (measured by Audio Science Review) |
| Weight | 2.6 lbs (1.2 kg) |
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