Unlock the true potential of your audio setup with the Radial Engineering J+4. This versatile stereo line driver is your go-to solution for seamlessly integrating consumer-level devices into professional audio environments. Whether you're in a recording studio, broadcasting booth, or on a live tour, the J+4 transforms low-level signals as feeble as -10dB into robust, balanced +4dB outputs, ensuring clean and powerful sound reproduction.

Engineered with precision, the J+4 boasts 100% discrete circuitry that guarantees optimal signal integrity. It employs active buffering and transformer isolation to eliminate noise, hum, and buzz, providing a pristine audio experience. The device is user-friendly with a straightforward control panel featuring a stereo gain knob, a high-pass filter to cut unnecessary low frequencies, and a ground lift switch to prevent ground loop issues.

Connectivity is key, and the J+4 delivers with dual 1/4" jacks, dual RCA inputs, and a 1/8" stereo TRS input. Its compact yet rugged design includes a 14-gauge steel I-beam inner frame and a protective book-end outer shell, making it a durable companion for any demanding audio setup. With its non-slip pad, the J+4 is stable and secure, ready to tackle any audio challenge.

Key Features:

• Boosts low-output devices (-10dB) to professional +4dB line level
• Transformer isolation for noise elimination
• Onboard stereo preamp with high-pass filter and ground lift
• Versatile inputs: 2 x 1/4" jacks, 2 x RCA jacks, 1/8" stereo TRS
• Durable 14-gauge steel construction
• Signal-to-noise ratio > 95dB
  
• Includes power supply

Owner's manual

Product specs

FAQs

What is the primary function of the Radial Engineering J+4?

The Radial Engineering J+4 is designed to convert unbalanced consumer-level signals to balanced professional line-level signals, making it ideal for integrating consumer audio devices with professional audio equipment.

What types of inputs does the Radial J+4 support?

The Radial J+4 supports a variety of inputs, including 2 x 1/4" jacks, 2 x RCA connectors, and a 1 x 1/8" mini-jack, offering flexibility for connecting different audio sources.

Does the Radial J+4 require an external power supply?

Yes, the Radial J+4 requires a 15V DC power supply, which is included with the unit.

Can the Radial J+4 help eliminate ground loop hum?

Yes, the Radial J+4 features a ground lift switch that can help eliminate ground loop hum when connecting different audio equipment.

How does the Radial J+4 handle signal level conversion?

The Radial J+4 effectively boosts low-level -10dB consumer signals to +4dB professional line levels, ensuring optimal signal integrity and compatibility with professional audio gear.