Radial J+4 Active Stereo Line Driver, -10dB to +4dB

Bring low-output audio up to professional line level

The Radial J+4 is an active stereo line driver that boosts unbalanced, low-output signals to balanced +4dB line level for professional recording and playback equipment. Transformer-isolated inputs help eliminate noise caused by ground loops, while active signal buffering provides clean gain.

Connect a laptop for presentation playback, bring a music player into a PA system or give a low-output keyboard the level it needs to drive a mixer's line input. With several input connector options and balanced XLR outputs, the J+4 makes it straightforward to bridge consumer audio sources and professional equipment.

Key features

• Stereo level conversion: Boosts low-level unbalanced signals from -10dB to professional +4dB balanced line level.
• Transformer-isolated inputs: Help eliminate hum and buzz caused by ground loops.
• Versatile input connections: Dual 1/4-inch inputs, RCA inputs and a stereo 3.5mm input accommodate keyboards, DJ mixers, computers and music players.
• Balanced XLR outputs: Connect directly to professional mixers and recording interfaces.
• Level adjustment: Adjust the signal level to suit the receiving equipment.
• Active buffering: Provides clean gain for low-output sources.
• Included power supply: External power supply supplied with the unit.

Product details

• Brand: Radial
• Model: J+4
• Type: Active stereo line driver
• Channels: Two (stereo)
• Signal conversion: Unbalanced -10dB to balanced +4dB
• Inputs: 1/4-inch, RCA and 3.5mm
• Outputs: Balanced XLR
• Isolation: Transformer-isolated inputs
• Manufacturer part number: R800 8015 00