Electronics / Amplifiers Receivers
Schiit Midgard Halo Headphone Amp and Preamp User Guide
Quick guide for the Schiit Midgard Halo headphone amplifier and preamp, covering connections, operation, troubleshooting, and technical requirements.
Table of contents
Quick guide from the manual
The Midgard is a fully-discrete high-power headphone amplifier and preamp featuring Halo mixed-mode feedback technology. This guide provides essential information for installation, connection, and operation. Always ensure the device is used with the supplied AC power adapter (14-16VAC, 1-2A) and kept away from moisture.
Connections
The rear panel provides the following connectivity options:
- Balanced inputs: Connect balanced sources using XLR cables.
- Single-ended inputs: Connect SE sources using RCA cables.
- Balanced preamp outputs: Connect to powered monitors or external power amps with XLR inputs.
- Single-ended preamp outputs: Connect to powered monitors or external power amps with RCA cables.
- AC input: Connect the supplied 14-16VAC wall-wart power supply.
Note: Both balanced and SE preamp outputs remain active at all times and do not mute when headphones are connected.
Operation
The front panel controls allow for input selection and volume adjustment:
- Input switch: Selects between balanced XLR (out) and single-ended RCA (in).
- Gain switch: Toggles between high gain (out) and low gain (in).
- Volume knob: Adjusts the output level.
- SE headphone jack: Standard 1/4 inch output for most headphones.
- Halo headphone jack: 4-pin XLR balanced output utilizing the Halo mixed-mode feedback system.
Note: There is an 8-10 second delay for the headphone output after powering on the device, which is normal operation.
Troubleshooting
- Sound drops out/clicking: Usually indicates over-current protection. Check for shorts in headphone cables or incorrect TRRS adapters.
- Hum: Check the source or consider using a ground loop isolator like the EbTech HumX.
- No power: Ensure the unit is plugged into a working AC outlet.
Manufacturer information
Schiit Audio
Practical help
Common problems
Sound drops out and the amp clicks
The unit is in over-current protection. Check for shorts in your headphone cable or ensure you are not using an incompatible TRRS adapter.
Humming noise
Check your audio source for the cause or use a ground loop isolator (e.g., EbTech HumX).
No sound immediately after turning on
This is normal; the device has an 8-10 second startup delay for the headphone output.
Before use
- Ensure you have the correct 14-16VAC, 1-2A AC power supply (DC adapters will not work).
- Verify that your headphones use a standard 1/4 inch plug or a compatible 4-pin XLR connector.
- If using 1/8 inch TRRS headphones with microphones, obtain a specific adapter to avoid shorting the outputs.
- Ensure the device has adequate ventilation and is not placed near heat sources.
Specs in practice
- 14-16VAC, 1-2A
- Required power input. Must be AC, not DC.
- Halo mixed-mode feedback
- Proprietary feedback system utilized when using the 4-pin XLR headphone jack.
Images and diagrams
- Rear panel: 1 (Balanced Input), 2 (SE Input), 3 (Balanced Preamp Out), 4 (SE Preamp Out), 5 (Power Switch), 6 (AC Input).
- Front panel: 1 (Input Switch), 2 (Gain Switch), 3 (Volume Knob), 4 (SE Headphone Jack), 5 (Halo XLR Headphone Jack).
Model compatibility
- Both balanced and SE preamp outputs are always active and do not mute when headphones are plugged in.
- 1/8 inch TRRS headphones (with microphones) may require a specific adapter to prevent shorting.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.