Before you listen
Make sure you plug your headphones in to the BOLT DAC before plugging the USB in to your playback device.
BOLT DAC/AMP SETUP GUIDES
| Platform | PDF Guide Download | Video Guide |
|---|---|---|
| IOS | BOLT GUIDE IOS TIDAL | BOLT VIDEO GUIDE IOS TIDAL |
| Android | BOLT GUIDE ANDROID TIDAL | BOLT VIDEO GUIDE ANDROID TIDAL |
| Windows | BOLT GUIDE WINDOWS | BOLT VIDEO GUIDE WINDOWS |
| BOLT GUIDE WINDOWS AUDIRVANA | ||
| BOLT GUIDE WINDOWS FOOBAR 2000 | ||
| MacOS | BOLT GUIDE MACOS TIDAL | BOLT VIDEO GUIDE MACOS |
| BOLT GUIDE MACOS ROON | ||
| BOLT GUIDE MACOS AUDIRVANA |
How to listen to lossless audio on your Iphone or ipad:
You can listen to lossless audio on an iPhone or iPad updated to iOS or iPadOS 14.6 you need an external digital-to-analog converter, the HELM Audio BOLT USB DAC/AMP.
How to turn lossless on or off on your iOS device
1. Go to Settings > Music. Tap Audio Quality. 2. Tap Lossless to turn it on or off. From here, you can choose the audio quality for streaming and downloading audio. *Select Lossless for a maximum resolution of 24-bit/48kHz, or select Hi-Res Lossless for a maximum resolution of 24-bit/192 kHz
Final step is to connect your headphones to the BOLT. Connect the BOLT to the included USB-C to USB-A adapter, and connect the USB adapter to Apple’s Lightning to USB Camera adapter, and connect it to your iOS device.
How to listen to lossless audio on your Mac:
You can listen to lossless audio on a Mac updated to macOS 11.4 you need an external digital-to-analog converter, the HELM Audio BOLT USB DAC/AMP.
How to turn lossless on or off
Open the Apple Music app. 1. In the menu bar, choose Music > Preferences. 2. Click the Playback tab. Under Audio Quality, select or unselect Lossless to turn it on or off. From here, you can also change the settings for streaming and downloading lossless. *Select lossless for a maximum resolution of 24-bit/48 kHz, or select Hi-Res lossless for a maximum resolution of 24-bit/192 kHz
Final step is to connect your headphones to the BOLT and then connect the BOLT to a USB port on your Mac.
BOLT DAC/AMP SPECIFICATIONS
| Specifications | |
|---|---|
| Product Name | HELM BOLT USB DAC |
| Output Level | 1.1 Vrms at <150 Ohms, 2 Vrms at >150 Ohms |
| Compatible Formats | PCM, MQA, DSD DoP |
| Connectivity | USB-C INPUT, 3.5MM OUTPUT |
| SNR | 120 dB |
| THD+N% | 0.0008 at <150 Ohms, 0.0013 at >150 Ohms |
| Frequency Response 20Hz-20kHz | +/- 0.06 dB |
| Dimensions | Length 112 mm (4.4”) |
| Width | 12.8mm (0.5") |
| Weight | 7.09 grams (0.25 oz) |
| Physical | USB Type-C Interface |
| Connection | USB 2.0 High Speed |
| PCM Sample Rates | 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz |
