---
product_id: 386643037
title: "HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio"
brand: "helm"
price: "3009 kr"
currency: DKK
in_stock: true
reviews_count: 6
category: "Helm"
url: https://www.desertcart.dk/products/386643037-helm-audio-bolt-dac-amp-usb-c-portable-high-end
store_origin: DK
region: Denmark
---

# +6 dB amplified output boost Auto headphone impedance matching 384 kHz PCM & 5.6 MHz DSD playback HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio

**Brand:** helm
**Price:** 3009 kr
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your mobile soundscape—because your ears deserve the studio experience everywhere.

## Quick Answers

- **What is this?** HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio by helm
- **How much does it cost?** 3009 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/386643037-helm-audio-bolt-dac-amp-usb-c-portable-high-end)

## Best For

- helm enthusiasts

## Why This Product

- Trusted helm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Future-Proof Streaming Ready:** Unlock master-quality streaming from Tidal, nugs.net, and more—turn your mobile device into a portable audiophile rig.
- • **Studio-Grade Sound On The Go:** Experience pristine, high-res audio anywhere with MQA decoding that unlocks every detail of your favorite tracks.
- • **Plug & Play USB-C Convenience:** Seamlessly connect to Android, iOS, and PC devices with a compact USB-C to 3.5mm adapter—no bulky gear required.
- • **THX Certified Audio Excellence:** Ultra-low distortion and EMI isolation deliver crystal-clear, immersive sound that outperforms typical mobile DACs.
- • **Tailored Volume for Your Headphones:** Smart impedance detection automatically adjusts output levels for flawless sound with any wired headphones.

## Overview

The HELM Audio Bolt DAC/AMP is a compact, USB-C portable digital-to-analog converter and headphone amplifier designed for audiophiles on the move. Supporting high-resolution PCM up to 384 kHz and DSD up to 5.6 MHz, it delivers studio-quality sound with MQA playback compatibility across Android, iOS, and PC platforms. Featuring THX certification, automatic headphone impedance matching, and a +6 dB output boost, it transforms any mobile device into a high-fidelity audio powerhouse in a sleek, pocket-sized form factor.

## Description

Portable Hi-Res DAC delivering no compromise MQA audio decoding Studio Grade Quality Sound anywhere you go with true audiophile digital audio conversion in the smallest USB-C to 3.5mm TRRS adapter available. MQA supported for the ultimate high fidelity listening experience possible for Android, iOS and computers. No-Excuses Audio Quality for On-The-Go Mobile Experiences with total portability and the convenience of streaming audio via your phone that now easily compete with your home audio audiophile gear. The HELM BOLT DAC/AMP delivers studio quality sound with a big soundstage, increased volume and the highest fidelity for mobile devices in a miniature package. Plug-and-play, you can connect to your phone and wired headphones to enjoy high definition audio as a DAC from PCM 384 kHz to DSD 5.6M. For the ultimate experience in streaming audio, listen to Master Quality Authenticated (MQA) content from providers like Tidal Masters, Nugs, or Xiami to unfold every detail of the original recording. **Free Customer support and how to videos on the HELM website. Android and Google Phone operating systems can be challenging to set up for HiFi streaming due to their firmware updates.. Please contact us we can assist.

Review: Best Audiophile Dongle Dac! - Amazing Dac Dongle I tried have many including all the Astel & kern dongles, hands down this is better in every way more detail in all areas and volume output, also its tiny, I have had this for a very long time, I should have reviewed this sooner! dont thing buy it you wont regret it!
Review: I liked the simplicity and size of this unit which I wanted to use with an Android phone - it is perfect in that respect. In addition, I found that the device was indeed every bit as good as the reviews claimed - the sound is open and spacious, clear and smooth and has a very good sound stage and an overall neutral sound. I wanted to try DSF files via Android from my home server which I was successfully able to achieve. Full marks to the combination of the Helm and USB Audio Player PRO in achieving this objective. On a further note, my first Helm device very intermittently exhibited a cracking sound (tricky to pinpoint for a while) and the Helm service was excellent in sending a replacement - the replacement is perfect so I do highly commend not just the product but also the aftersales service! First class all round.

## Features

- Serious Sound Quality in the Smallest Package - Plug in and immediately hear the sound quality dramatically improve from any mobile device across all listening formats. Bolt delivers studio sound on the go and supports MQA files for a new level of portable audio. Works with Android, iOS and PC's. May require extra adapters or third party apps for MQA support. *Scan the QR code in the manual for the latest set up videos for each platform. Questions, please reach out to our support team.
- Like 4k Video for Your Ears Master Quality Authenticated (MQA) unlocks every detail of the original master recording with the convenience of streaming audio. MP3 and similar audio streams deliver 10% of the original recording quality, but the HELM BOLT can stream and unfold MQA content to stunning better-than-CD audio resolutions. Stream MQA content from Tidal, nugs.net, and Xiami.
- Plug-In and Hear the difference: USB-C input to a 3.5mm Headphone Output supporting playback of PCM files with sampling rates up to 384 kHz, or DSD files with sampling frequencies up to 5.6MHz. The 3.5mm audio jack seamlessly connects to your wired headphones or speaker system.
- Amplified Audio Output and Headphone Output Level Matching An average increase of +6 dB in devices with combined USB-audio output (where a dedicated headphone audio output isn't available.) Headphone output level automatically detects headphone impedance and sets level accordingly: (1V for  150 ohms.). Note: Increased dB levels vary based on each type of set up. Email our support team with any questions, we are here to assist.
- Exclusive Design with THX Certification: Ultra-low harmonic, crosstalk, and crossover distortion. Unlike other mobile MQA-DAC designs, the HELM BOLT physically isolates the DAC from the USB connector for improved EMI isolation, and uses a three oscillator design for superior frequency lock with dramatic improvements over other DAC designs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B086GK94X2 |
| Best Sellers Rank | #117,714 in Electronics ( See Top 100 in Electronics ) #173 in Headphone Amps |
| Department | womens |
| Item model number | HMQA-100B |
| Manufacturer | HELM |
| Product Dimensions | 10.16 x 0.64 x 0.25 cm; 28.35 g |

## Product Details

- **Brand:** HELM
- **Maximum supply voltage:** 2 Volts
- **Minimum supply voltage:** 5 Volts
- **Mounting type:** Cable Mount
- **Number of pins:** 24

## Images

![HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio - Image 1](https://m.media-amazon.com/images/I/718jJZBLnCL.jpg)
![HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio - Image 2](https://m.media-amazon.com/images/I/71o6eOyDwHL.jpg)
![HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio - Image 3](https://m.media-amazon.com/images/I/714mxcacvsL.jpg)
![HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio - Image 4](https://m.media-amazon.com/images/I/71c4Bto0aRL.jpg)
![HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio - Image 5](https://m.media-amazon.com/images/I/81kCnmW++pL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best Audiophile Dongle Dac!
*by F***T on 25 February 2025*

Amazing Dac Dongle I tried have many including all the Astel & kern dongles, hands down this is better in every way more detail in all areas and volume output, also its tiny, I have had this for a very long time, I should have reviewed this sooner! dont thing buy it you wont regret it!

### ⭐⭐⭐⭐⭐ Review
*by C***D on 1 August 2022*

I liked the simplicity and size of this unit which I wanted to use with an Android phone - it is perfect in that respect. In addition, I found that the device was indeed every bit as good as the reviews claimed - the sound is open and spacious, clear and smooth and has a very good sound stage and an overall neutral sound. I wanted to try DSF files via Android from my home server which I was successfully able to achieve. Full marks to the combination of the Helm and USB Audio Player PRO in achieving this objective. On a further note, my first Helm device very intermittently exhibited a cracking sound (tricky to pinpoint for a while) and the Helm service was excellent in sending a replacement - the replacement is perfect so I do highly commend not just the product but also the aftersales service! First class all round.

### ⭐⭐⭐⭐⭐ Review
*by D***G on 9 July 2024*

I plan on getting an external DAC for my mobile device since I subscribed to Tidal. I've also tried Amazon HD, but I chose Tidal way back when they first started getting attention for personal reasons. Of course, you can only stream their higher quality tracks (higher bit rate) with a device that can utilize HD formats. This was near impossible for mobile devices then, but fast forward to the present, by chance, I encountered some DACs on Amazon that were made for this. After looking around I decided on the Helm Audio Bolt DAC, USB C because of it's small size and good reviews. Long story short, I love it, and it improves the sound quality of my Pixel 8. I use it in my car with headphones, Final E5000, and Audio-Technica ATH-M20X. The E5000 pairs very well with the Bolt, the AT not so well yet, but I'm hoping after some tuning I can get it to run well. If you're looking for a DAC for your mobile device, I highly recommend the HELM Audio Bolt. There's a lot to choose from, so I would do research, but this product has my backing.

## Frequently Bought Together

- Helm Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio
- F2 Planar Magnetic Dual Driver Wired HiFi in-Ear Headphones - Earbuds, Pro-Sound Quality with 2 High-End Drivers, Total Clarity & Deep Bass, Sound Isolating Secure Fit, Controls, Mic, 3.5mm

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-06*