---
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: "432 Ft"
currency: HUF
in_stock: false
reviews_count: 6
url: https://www.desertcart.hu/products/386643037-helm-audio-bolt-dac-amp-usb-c-portable-high-end
store_origin: HU
region: Hungary
---

# +6dB amplified output boost 384kHz PCM & 5.6MHz DSD playback USB-C to 3.5mm seamless plug 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:** 432 Ft
**Availability:** ❌ Out of Stock

## Summary

> 🎧 Unlock Master-Level Audio Anywhere — Because Your Ears Deserve the Best

## 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?** 432 Ft with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/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

- • **Plug & Play Simplicity:** Instantly upgrade your mobile audio with a compact USB-C DAC/AMP—no bulky gear, just pure sound clarity.
- • **Universal Compatibility:** Works flawlessly with Android, iOS, and PC devices—your all-in-one portable studio sound solution.
- • **Studio-Grade Sound On The Go:** Experience pristine, high-res audio anywhere with MQA decoding that unlocks every detail of master recordings.
- • **Adaptive Headphone Level Matching:** Automatically adjusts output voltage for headphones under or over 150Ω, ensuring perfect volume and fidelity.
- • **THX Certified Ultra-Low Distortion:** Enjoy crystal-clear sound with minimal harmonic and crosstalk interference thanks to advanced EMI isolation and triple oscillator design.

## Overview

The HELM Audio Bolt DAC/AMP is a compact, USB-C portable high-end digital-to-analog converter and headphone amplifier designed for audiophiles on the move. Supporting MQA playback and high-resolution PCM (up to 384kHz) and DSD (up to 5.6MHz) files, it delivers studio-quality sound with amplified output and automatic headphone impedance matching. THX certification ensures ultra-low distortion and EMI isolation, making it compatible with Android, iOS, and PC devices for a premium mobile listening experience.

## 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 | #120,899 in Electronics ( See Top 100 in Electronics ) #189 in Headphone Amps |
| Brand Name | HELM |
| Compatible Devices | Amplifier, Personal Computer, Smartphone |
| Customer Reviews | 4.0 4.0 out of 5 stars (411) |
| Global Trade Identification Number | 00840020800071 |
| Included Components | USB Adapter & Carrying Case |
| Interface | USB-C, 3.5mm |
| Item Dimensions L x W | 10.2L x 0.6W centimeters |
| Item Weight | 1 Ounces |
| Manufacturer | HELM |
| Material Type | Aluminum |
| Maximum Supply Voltage | 2 Volts |
| Minimum Supply Voltage | 5 Volts |
| Model | HMQA-100B |
| Mounting Type | Cable Mount |
| Number of Channels | 2 |
| Number of Pins | 24 |
| Part Number | HMQA-100B |
| UPC | 840020800071 |
| Unit Count | 1.0 Count |

## 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 E***R on 7 July 2022*

I was happy to find it worked directly with the USB C input on my iPad Pro without a docking station. Very good sound. So far as I can tell there is no or little amplification stage. The sound level is the same as when I plug in my headphones through a USB C to headphone adapter. I believe Helm Audio makes a separate headphone amplifier. This DAC drives my HiFiMan HE 400i headphones adequately, albeit at close to full volume. But the same is not true when I connect this to my MacBook Air. There the volume is inadequate. Reminder that to enable hi res on an iPad you have to go into the Music Settings. Otherwise you just get lossless. Edit, after 2 months this stopped working completely.

## 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 Hungary*
*Store origin: HU*
*Last updated: 2026-07-07*