The HELM Bolt ranks #18 out of 26 total USB-C Dongle DACs for sound quality. See all Headphone Amps and DACs rankings for every top pick.
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#18 HELM Bolt: $89.99 HELM Audio $89.99 eBay
Pros: Audio Science Review measured a SINAD of 100 dB, clean for nearly all listening with most headphones. It is a very light 7 g USB-C dongle with a 3.5 mm jack that works with phones and laptops.
Cons: HELM doesn’t publish a power figure into 32 ohms, and it has no balanced output. The Fosi Audio DS1 rates higher and measures cleaner at 104 dB for less, while sensitive in ear monitors may still reveal a little noise.
| Released | Nov 2020 (5 years ago) |
|---|---|
| Balanced Output | No |
| DAC Chip | ESS ES9281A Pro |
| Device Type | USB-C dongle |
| Dimensions | 0.5” x 4.4” (12.8 x 112 mm) (width x length) |
| Headphone Outputs | 3.5 mm |
| Inputs | USB-C |
| SINAD | 100 dB (measured by Audio Science Review) |
| Weight | 0 lbs (7.09 g) |
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