Radial SB-5

Laptop DI with link lead – Stereo, Passive

Our price:$209.00 GST
Order Code: SB-5

IN STOCK 2 (more can be backordered)

Stage Bug SB-5 has the same design and function attitude as the rest of the Radial Stage Bug range – including the essential (non-negotiable) elements for a squeaky clean signal path, and gets it crammed into a super-compact housing, so there’s no excuse for traveling to a gig without one.

Small enough to stick in the pocket of a laptop case, SB-5 is designed especially for the AV presenter – allowing laptop computers, tablets and other consumer audio products when amplifying the signal through a PA system.

Even simpler than finding a cable and a suitable stereo DI box, SB-5 has an integrated input cable that connects from the headphone out via a flexible 1.5m cable, terminated with a standard 3.5mm stereo connector. The cable is secured via a clamping strain relief and is wrapped using the sidewinder cleat for easy storage.

..more below…


  • Stereo direct box for laptop computer
  • Integral 1.5m cable with sidewinder cleat
  • Transformer isolation eliminates noise
  • Plug & play easy to use – no power required

Check the entire Radial Stage Bug range here.

Inside the stiletto-proof 14 guage steel casin is where the real action happens though. The signal is sent to a pair of custom wound transformers where the impedance is lowered and the signal is balanced for long cable runs – upwards to 100 metres. Transformers further benefit by isolating the computer from the PA system to help eliminate hum and buzz caused by ground loops. Of course, there is a ground lift switch to further reduce ground contamination.

A choice of output connectors is available including a stereo set of ¼” balanced TRS jacks for full stereo operation or an XLR out that automatically sums the left-right program material to mono. This can save valuable channels on the PA system and makes setup easier in situations where full stereo reproduction is not required.

A switchable -15dB input pad is handy to reduce sensitivity and enable extra high output sources to be connected without distortion.


Audio circuit type: Passive, transformer based
Number of channels: Two channels, mono or stereo outputs
Frequency response: 20Hz ~ 20KHz (± 1dB)
Dynamic range: 100dB
Maximum input: +20dB
Total harmonic distortion: 0.01% @ 1kHz
Phase deviation: 2° @ 100Hz; 5° @ 50Hz
Input impedance: 40k Ohms, unbalanced
Output impedance: 2.8k Ohms, balanced


Transformer: Custom design
Input pad: -10dB
Auto Merge: Sums left & right sources to mono at XLR
Ground lift: Disconnects pin-1 at 1/4″ TRS outputs
XLR configuration: AES standard (pin-2 hot)
Input connector: 3.5mm integrated 1.5m cable
Output connectors: 1/4″ TRS stereo / XLR-M mono merge


Construction: 14 gauge steel chassis & outer shell
Finish: Durable powder coat
Size: (L x W x D) 114mm x 47mm x 34mm
Weight: 0.55 lbs (250 grams)
Shipping Size: (L x W x D): 203mm x 127mm x 76mm
Shipping Weight: 365 grams
Power: Passive, no power required
Conditions: For use in dry locations only between 5°C and 40°C