Detail 01
Hi-Z to Lo-Z transformer
Drops signal to mic level and balances it, so long cable runs stay quiet and hum-free.
Product detailSKU #1274034477506
Rapco HorizonDBBLOX Hi to Lo Z Transformer Direct Box
Independent shopping perspective
The Korena take
A passive transformer DI that converts a high-impedance instrument or line signal to balanced low-Z XLR. For plugging guitar, bass, or keys into a mixer.
Strong match
Who this is for
- Running a bass or acoustic pickup straight to a stage snake
- Sending a keyboard or laptop output to a mixer 100 ft away
- House-of-worship or club stages needing a cheap spare DI
Consider the trade-offs
When to look elsewhere
- Players wanting tone shaping or a tube/active preamp voice
- Active pickups or line-level sources needing a pad and headroom margin
- Studios chasing a specific boutique transformer character
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Passive design
No battery and no phantom power needed. Fewer failure points on a stage.
Detail 03
XLR output
Plugs straight into any mixer or snake mic input, no adapter.
Detail 04
Transformer isolation
Breaks the ground path between amp and PA, which is what usually kills buzz.
Detail 05
Under $30
Cheap enough to keep two in the gig bag as spares.
Final check
Know before you order
- 01No cables included. You supply the instrument cable and the XLR run.
- 02Passive DIs lose a little level; expect to add gain at the mixer.
- 03Passive boxes can sound thin with weak, high-impedance piezo pickups.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does it need phantom power or a battery?
No. It is a passive transformer box, so it works with no power at all. Phantom on the channel will not harm it.
02Can I use it for a keyboard or laptop?
Yes. It takes a line or instrument level source and converts it to balanced mic level for the mixer.
03Will it fix hum from my amp?
Often. The transformer isolates the grounds between your rig and the PA, which is the usual cause of buzz.
04Is it stereo?
No. It is a single-channel box. Two are needed for a stereo keyboard rig.
