THE HELM BOLT - MOBILE STUDIO-QUALITY USB DAC/AMP WITH MQA
- The HELM BOLT - Mobile Studio-Quality USB DAC/AMP with MQA
- Raising the Bar in Your Audio Quality. Now Accessible on Your SmartPhone.
- Plug & Play on Your Favorite Mobile Device for Incredible Studio Quality Audio
- THX Certified - Plays All Music Files: MP3 to MQA and Hi-Res
- MQA Stream Unfolding and HD Support on the Top Hi-Rez Streaming Services
- Industry Acclaimed Design & Technology Delivers the Purist Audio Signal
- Works with Android, iOS, MacOS and Windows 10 *iOS requires a Lightning to USB Camera Adapter
- Ultra-Low Harmonic Crosstalk & Reduced Crossover Distortion
- Exclusive 3 Oscillator Design & Impedance Matching
- USB-C Input and 3.5mm Headphone Output
- LED: Blue SD Audio <= 48kHz - Red HD Audio > 48kHz - Magenta For MQA
STUDIO QUALITY AUDIO
The HELM BOLT DAC/AMP - the High Definition Digital Analog Converter with MQA rendering technology to bring studio quality audio to your phone. Compatible with Android, iOS, MacOS & Windows 10. **iOS requires a Lightning to USB Camera Adapte
THE NEXT STEP IN AUDIO DEFINITION
Remember Standard Definition video? It had a monopoly on bad visual quality. Video evolved, Standard gave way to HD, and 4k video made you hate the way HD looked. Video quality moved forward, but audio quality moved sideways. Lossy data compression kept bandwidths low, but everyone now listens to the audio equivalent to Standard Definition or worse.
MASTER QUALITY AUTHENTICATED
Imagine 4k video for your ears. Master Quality Authenticated (MQA) is an award-winning technology that unlocks every detail of the original master recording with the convenience of streaming audio. MP3 and similar streaming technologies deliver 10% of the original recording quality, but the HELM BOLT can stream and unfold MQA music at over 8 times the sampling rate of CD. Stream MQA content from Tidal, Nugs and Xiami. (For more info on how MQA works, go to mqa.co.uk.)
CRYSTAL CLEAR DETANGLING
How does MQA sound? Vocals have presence and clarity, drums and percussion are sharp and impactful, strings have tactile nuance, and mixes that are muddy with conventional streaming become detangled and multidimensional when heard in MQA.
The HELM BOLT is an amazing sounding High-End Digital Analog Converter for your high-res FLAC or WAV files, and it will improve audio quality while streaming Apple Music, Spotify, Amazon, and others. supporting playback of PCM files with sampling rates up to 384 kHz, or DSD files with sampling frequencies up to 5.6MHz.
The HELM BOLT is THX Certified for 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 performance, and uses a three oscillator design for superior frequency lock with dramatic improvements over single oscillator DACs.
PLUG & PLAY
For Android*, iOS*, MacOS, and Windows 10. Featuring a USB-C input and a 3.5mm audio output to connect to your wired headphones or speaker system. Headphone output level automatically detects headphone impedance and sets level accordingly: (1V for < 150 ohms, 2V for >= 150 ohms.) A simple LED indicates MQA rendering or sample rate playback, Blue for idle or SD audio <= 48kHz, Red for HD audio > 48kHz, Magenta for MQA content.
⚡️ Power Output Wise AMP & DAC Guide
|Brand Name||Model No||32ohm 3.5mm||32ohm 2.5mm||32ohm 4.4mm||300ohm 600ohm 6.35mm|
|FiiO||K9 Pro||≥ 2000mW||≥ 2000mW|
|Q1 Mark II||75mW||220mW|
|7HZ||71 DAC & AMP||70mW|
|Tempotec||Sonata HD V||95mW|
|Sonata HD PRO||60mW|
|Sonata HD Ⅱ||70mw|
|Luxury & Precision||W2||125mW||230mW|
|9038S Gen 3||340mW|
|Venture Electronics||AVANI ALC5686||30mW|
It serves the purpose of being a portable USB DAC, and work with majority of apps (on android). It does become hot at times, especially if you're driving them at higher volumes. The bit-rate/sampling-rate LED indicator is ornamental, since Android by design, tries to keep a uniform bit-rate and sampling-rate. Very few apps like Neutron, support bit-rate based mode switching, however that is not a smooth experience.
On the physical side, the product image doesn't agree completely with the actual product, with the edge of the product being sharp compared to the rounded corners on the product page. Not sure if that is a different version of the same product.
I was using ASUS AI noise cancelling USB adapter, and it had a tendency to roll off the higher frequencies. Compared to that, the sound separation is better with better frequency response.
Excellent sound quality and fidelity when paired with my Marantz PM-35 amplifier and Wharfdales diamond 9.1 bookshelf. Supports high quality audio streaming.
The Helm Bolt has been the best recommendation that has been made as real portability and pairs very well with the USB Audio Pro app. Strongly recommend it for anyone who is looking for quality on the go.
I never thought It's going to deliver fantastic sound and pair with beyerdynamic it's simply superb
Received in a couple of days post ordering- super quick. The DAC itself works flawlessly, I have connected using the iPad, laptop and phones. The sound quality improvement is distinct and substantial. Have tried with stored FLACS, online lossless streaming from Apple music and MQA format from nuggs. Worked brilliantly well all the time (and, the LED indicator changed colour 🙂).
The device will survive some rough handling and comes with a nifty pouch.
PS: if you are planning on using with a Windows based laptop, please do change the default sound output stream in settings to high-res.
I use this types of product first time. After 12days using I'm very much happy. I recommend this product for enhanced quality of sound.
If You Like The Helm BOLT DAC/AMP - MQA & THX Certified You Will Also Like
Trusted By Over 15K+ Music Enthusiast
When i am use this dac in my iem, sound quality much better and improve. Nice product.
Fitting is OK. But earpads could be much softer. Other than that go for it.
This converter is excellent, recommended. I have tried this with even a locally made earphones and also branded. It really made lot of difference in quality. Price tag is also reasonable, worth buying recommended.
I have piston fit. Later I bought edx pro(just a curious bug in head to try iem), then I wanted to buy 1more single driver. But unfortunately it's not available on sites these days. Then I stumbled upon demo section. I saw these earphones. I bought them. They came in excellent condition. Sound is really a big upgrade over piston fit. Music listening is more fun. Guitars felt a little low. I listened to the long after you've gone. Guitar strums were not that joy giving (compared to edx pro). Mahaganapatim by the priyarang project . Initial sounds I don't know what they are called;felt so good. I could feel the sounds coming from different positions. Thank you.
Those who are looking for 2.5mm male to 3.5mm female convertion adapter please don't go for this. This adapter may be only used with the particular sennhizer Headphone only.
Good quality convertion cable from 2.5mm male to 3.5mm female, served the purpose very well.
They are very good performing in all genres of music although not bass heavy. Although would like to see how they test against time with build quality and all.
Excellent Cable worth for price
Nice and sturdy case ideal for storing IEMS/earbuds & cables on the go.
This is my first IEM purchase. To be honest the sound quality is way more than I expected. For beginners like it's ideal choice to test & experince.Hearing good quality music for past three months. Looking forward to develop and upgrade my audiophile experience. Eyeing on the next one. Will snatch the right one soon
Value for money, great iem for this price, as others have said in their reviews, these are good and leaves nothing much to be said.
first time ordering from the audio store, the packaging was nice, they included additional 2 pairs of black silicone eartips, which i appreciate very much!
I asked for replacement once I recieve the replacement product i will review again
Bass is very leaky , wanted a balanced tight bass like that of cx180 but not even close to that.
Fitting could have been better.
Can get equivalent tws /neckband for under 3000.
Very good product
TL;DR: EarAudio adapter is great, if you need balanced, go for it, its worth a shot.
Wanted to use my sennheiser HD660S with the balanced port of fiio btr5. I do use senns with ifi hip dac as my main driver, so just wanted to try the fiio balanced option. So, needed a converter which could convert 4.5mm male end of senns cable to 2.5mm male end (fiio has 2.5mm female input end for balanced connection).
Senns do come with 3.5mm regular cable so I had already used the fiio btr5 with senns (on 3.5mm) and was quite impressed with the output, but was still curious about balanced connection, so got the earaudio converter to give balanced a try and it was worth it.
The connector / converter (EarAudio 2.5mm male to 4.4mm female Adapter Cable) is of great quality, I don't think there's any loss in quality at all, at least while using with stock senns cable (which are already quite good). Serves the purpose well, build is great as well.
So, for someone who'd want a couple words about balanced connection, it's a hobby guys. For me, balanced (on fiio) sounded way better than single ended because fiio btr5 provides more power output in its balanced output than its single ended connection and secondly, btr5 balanced output is just way better in every way than its 3.5mm counterpart.
I used the adapter with senns hd660s, fiio fh3 (4.4mm balanced cable). For iems, its not that exciting to go balanced route as iem (in general) don't need that much power but if you have a full size headphone lying around which could use balanced, its worth a shot to try balanced (with something like btr5).
Caution: ifi hip dac also has balanced, but its balanced is useless for iem as it hisses a lot with iem, so before going balanced, make sure to read some reviews.
As for my iem, FH3 (with btr5), I'm using them with a balanced 4.4m cable which just changed the way it sounded originally. Fh3 with 4.4mm connection is a different beast, punches above its weight and in this particular case, the balanced connection was super worth it.
Are You Struggling To Pick The Right Product For Your Individual Needs?
We're here to help.
- Opens in a new window.