Balanced signal driver -10dB to +4dB
The J+4(TM) is a stereo interface designed to accept low-output unbalanced devices such as instruments, computers or mobile devices and boost their signal to a balanced +4dB level for connection to professional audio devices. audio recording and playback.
Features
Stereo preamp signals at a balanced +4dB line level
Increases gain for low output instruments and music players
Isolated transformer to eliminate noise caused by ground loops
Multiple input connector options to interface with any device
Boost and balance any stereo signal
The J+4 allows you to amplify almost any stereo signal to a balanced +4 dB line level output, which can be sent over long distances without signal loss and connected directly to professional audio equipment such as a mixer or recording interface. Multiple input connectors are available for integration with a variety of devices, including a stacked set of 1/4" jacks for DJ mixers or keyboards, RCAs for CD players, and a mini jack 3.5mm for smartphones and tablets The J+4 delivers exceptional sound performance and is capable of providing clean gain and eliminating noise by combining the benefits of active signal buffering with isolation. of the transformer.
D+4 Applications
Using J+4 to amplify a stereo signal
Increasing the output of a CD player to a balanced +4dB signal is easy. Just plug in the RCA inputs, adjust the volume and the J+4 does all the work. Transformer isolation eliminates ground loops for quiet performance every time.
Using D+4 with your computer
Today, computers and laptops are used in all types of audio-visual systems. The J+4 easily interfaces with a built-in 3.5mm (1/8") TRS jack. Plug it in and the J+4 will amplify and balance the signal and deliver a professional line level signal.
Using D+4 with a keyboard
Many keyboards and synthesizers don't have enough output to effectively drive line-level input to a mixer. This is particularly annoying on older keyboards like a Rhodes piano. The J+4 is easy to use thanks to its integrated "inputs" and balanced XLR outputs.