Radial JPC 2-Channel Active Stereo Direct Box for Laptop Computer Sound Cards

The JPC is an analog stereo interface designed to help solve the hum and buzz problems commonly associated with connecting a computer or consumer playback device to an audio system.

Hybrid circuit for low noise
The JPC is a stereo direct box that is easy to use with practically any consumer electronic device. It utilizes active buffers and transformer isolation to create a hybrid circuit that blocks ground loops and reduces system noise, along with AC blocking capacitors to prevent any audio system noise from bleeding back into the computer. The choice of ¼", RCA and 3.5mm input connectors make it easy to interface with all types of unbalanced audio sources such as computers, smartphones, and tablets, and the outputs are XLR balanced mic level to feed snake systems and PAs. Powering the JPC is accomplished via 48V phantom from a mixing console, allowing the JPC to be used in concert environments without requiring an external power supply.

Using the JPC with a computer
Computers are often the cause of noise in the PA system. The JPC's combination of transformer isolation with an active drive circuit helps reduce noise by eliminating stray currents.

Using the JPC with a DJ setup
The JPC is well suited to handle the type of audio generated by CDs and digital audio files. By isolating the the source with the PA system you also eliminate noisy ground loops.

Using the JPC with an Phone
The JPC's 3.5mm (1/8") TRS jack makes it easy to interface portable playback devices. This makes it easy to bring unbalanced audio tracks into the PA system via the balanced mic input of a console.

Key Features:

• Isolated XLR connectors to eliminate chassis ground potential.
• Active balanced circuit drives long cable runs without signal loss.
  
• Audio Transformers on both inputs provide 100% isolation to eliminate hum and noise causing ground loops.
• 14-Gauge steel welded I-beam construction makes it impossible to torque the PC board.
  
• High grade switches - long life, high cycle for reliable performance.
  
• Military spec PC board with full surface ground plane to reduce RF noise susceptibility.
  
• A -10dB pad reduces the level going into the JPC from loud sources that could overload the circuit and cause distortion.
  
• 48V Power on LEDs lets you know that phantom has been turned on and is powering the two channels.
  
• 1/4" TRS connector that will also work with 1/4" mono instrument signals!
  
• 1/8" TRS connector designed for PCs and laptops, makes connection easy with standard 1/8" to 1/8" cable.
  
• Twin RCA connectors are great for connecting DVD/CD players and video machines. RCA thru-puts for flexibility.
  
• Book-end design creates a protective zone around the switches & connectors - Indestructable 14-gauge steel construction.
  
• Twin balanced XLR male output connectors; AES standard with Pin-1 ground and Pin-2 hot.
  
• Full no-slip rubber bottom pad provides mechanical isolation, electrical insulation and 'stay-put-ability!'
  
• Heavy-duty baked enamel finish for excellent durability and great looks for years!