Radial J+4, Active -10dB to +4dB stereo line driver with transformer isolated inputs

The J+4™ is a stereo interface designed to accept unbalanced low output devices such as instruments computers or mobile devices and boost their signal to a balanced +4dB level for connection to professional audio recording and playback equipment.

• Stereo preamp boost signals to +4dB balanced line level
• Increases gain for low output instruments & music players
• Transformer isolated to eliminate noise caused by ground loops
• Multiple input connector options to interface with any device

Boost & balance any stereo signal

The J+4 allows you to boost nearly any stereo signal up to a +4dB balanced line level output which can be sent over long distances without signal loss and connected directly to pro audio equipment such as mixers or recording interfaces. Multiple input connectors are available for integration with a variety of devices including a stacked set of ¼" jacks for DJ mixers or keyboards RCAs for CD players and a mini 3.5mm jack for smartphones and tablets. The J+4 delivers exceptional sonic performance and is able to provide clean gain and eliminate noise by combining the advantages of active signal buffering with transformer isolation.

The Radial J+4 is a stereo preamplifier designed to boost unbalanced instruments and consumer level signals and bring them up to a professional +4dB balanced line level. Careful attention has been paid to delivering quality audio while incorporating transformer isolation for added noise suppression. The J+4 delivers a performance that is as good or better than devices costing many times more.