HELM BOLT DAC/AMP
Best portable upgrade for audiophiles seeking studio-quality sound on the go.
This pocket-sized adapter turns your phone into a legitimate high-fidelity source, delivering the kind of clean, studio-grade power usually reserved for desktop rigs. You sacrifice a bit of bulk for a dongle, but the trade-off is an uncompromising, lossless listening experience that finally does justice to your demanding wired headphones.
$89.99
In stock
at
Helm Audio
Owner Satisfaction
4.6
/
5
Category Rank
335
/
1072
#335 in Headphone Amplifiers
Price vs Category Average
-94%
Below average
Input
USB-C
/
USB-C
Who it's for
- Audiophiles seeking high-fidelity streaming and studio-quality resolution
- Commuters needing lightweight, pocket-friendly audio upgrades
- Users wanting seamless, driver-free connectivity across multiple platforms
Who should skip it
- Owners of demanding, high-impedance studio headphones
- Mobile users concerned about smartphone battery longevity
- Careless users worried about long-term cable durability
Performance breakdown
Audio Fidelity
THX certification ensures studio-grade clarity for even the most demanding listeners.
Portability
Compact form factor makes high-fidelity audio effortless to carry anywhere.
Ease of Use
Plug-and-play functionality removes the headache of complex driver installations.
Signal Integrity
Advanced oscillator design effectively minimizes interference for a pristine soundstage.
Format Support
Native MQA rendering delivers lossless quality for modern high-resolution streaming.
Drive Capability
Robust power output handles power-hungry wired headphones with impressive authority.
Key Specs
Input
USB-C
Output
3.5mm headphone jack
Certifications
THX, MQA
Output Resolutions
Up to 96 kHz for MQA content
Compatibility
Android, iOS (with adapter), Windows, MacOS, Linux
Frequency Response
Flat (THX Certified standard)
Total Harmonic Distortion
0.0001%
Form Factor
Portable
Know before you buy
Still have a question?
Ask Metto anything about the HELM BOLT DAC/AMP before you decide.