Radial Engineering
Radial Engineering Highline Stereo
Best audio clarity solution for complex sound systems.
This passive line isolator is engineered for guitarists and bassists utilizing amp simulators. It employs premium Jensen 1:1 transformers to preserve full signal volume while effectively eliminating ground loops and safeguarding against phantom power. The device delivers balanced outputs, ensuring signal integrity over long cable runs for exceptional clarity and quality. It serves as an ideal solution for seamlessly integrating pedalboard amp simulations with PA systems, providing a clean and robust audio path.
$249.99
Owner Satisfaction
4.7
/ 5
Category Rank
34
/ 183
#34 in Direct Boxes
Price vs Category Average
-17%
Below average
DI Box Type
Passive
/ Passive
Who it's for
- Musicians and producers integrating various audio sources and destinations.
- DJs and home studio users needing quick, accurate volume adjustments.
Who should skip it
- Users with low-output sources needing signal amplification.
- Budget-conscious individuals seeking a basic, inexpensive ground loop fix.
- Beginners expecting a multi-purpose audio solution for recording or mixing.
Performance breakdown
Signal Integrity
Jensen transformers ensure the audio remains pristine and completely uncolored.
Noise Rejection
Effectively eliminates ground loops and hum for a silent signal path.
Build Durability
Rugged steel housing handles the rigors of touring and daily use.
Phantom Power Protection
Robust circuitry keeps sensitive gear safe from accidental voltage spikes.
Stereo Versatility
Dual-channel design perfectly preserves complex stereo pedalboard setups.
Ease of Integration
Simple passive design makes connecting amp simulators to PA systems effortless.
Key Specs
DI Box Type
Passive
Number of Channels
2 (Stereo)
Input Connectors
1/4" TS (x2), XLR (x2)
Output Connectors
XLR (x2)
Transformers
Jensen 1:1
Ground Lift Switch
Yes
Phantom Power Protection
Yes
Housing Material
Steel
Know before you buy
If you are running your pedalboard or amp modeler directly into a PA system, you are likely to encounter ground loops—that annoying hum or buzz. The Highline Stereo isolates your signal path to eliminate that noise while ensuring your stereo signal remains clean and balanced over long cable runs.
No, the Highline Stereo is a completely passive device. It does not require batteries or an external power supply, making it a reliable, 'set-it-and-forget-it' solution for your signal chain.
Not at all. Because it uses premium Jensen 1:1 transformers, it is designed to maintain full signal volume and preserve the integrity of your tone without adding coloration or loss.
Yes. The Highline Stereo is specifically designed to block phantom power, so you can safely connect your pedalboard or amp modeler to a mixing console without worrying about accidental damage from the PA system's 48V supply.
Absolutely. It works perfectly with any stereo line-level source, including guitar and bass amp modelers, synthesizers, or keyboards that need to be connected to a professional sound system.
Still have a question?
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