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Radial Engineering J+4 Stereo Line Driver -10dB to +4dB Interface
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      Radial Engineering J+4 Stereo Line Driver -10dB to +4dB Interface (712959)
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Safely connects a -10dB player to +4dB mixer, eliminates noise, and cleans up playback with
high-pass/low-cut filter.

The Radial Engineering J+4 Stereo Line Driver accepts consumer level -10dB unbalanced high impedance signals and converts them to +4dB balanced low impedance signals. If your needs involve pro audio, whether in broadcast, recording studios, or live touring, you'll find the Line Driver box invaluable.

Radial paid careful attention to noise elimination by combining the advantages of active signal buffering with transformer isolation. The J+4 delivers better than 95dB signal-to-noise. It also keeps hum and buzz caused by ground loops and spurious clocking noise from polluting the signal path.

For reliability and ease-of-operation, Radial kept controls on the J+4 to a minimum. Input connectors include a stacked set of 1/4" jacks for DJ mixers or keyboards, RCA's for CD players and a mini 3.5mm for I-pods.

High Pass Filter
The Radial stereo J+4 is equipped with a handy high-pass filter that is used to cut low frequencies below 100Hz. This provides several important benefits. First and foremost, when playing back audio tracks through a PA system, excessive bottom end can produce low frequency resonance which in turn can cause runaway feedback. It is also important to note that bass frequencies contain significantly more energy than higher frequencies. Reducing bass content can dramatically increase your system's dynamic range. Finally, by reducing unneeded low frequencies, it really helps clean up the mix.

Built tough
As with all Radial products, the Radial J+4 is built tough to handle the extreme rigors of professional touring. A unique 14-gauge steel I-beam inner frame ensures the sensitive PC board will not be subjected to outside stress which could potentially cause solder joints to fail. An innovative book-end outer shell creates protective zones around the sensitive controls, switches and connectors to further improve dependability while a full bottom no-slip pad provides both mechanical and electrical isolation.

The Radial J+4 balanced line driver delivers exceptional sonic performance, plenty of headroom and ultra-low noise making it the ideal companion in today's more demanding professional audio systems.

Radial Engineering J+4 Stereo Line Driver -10dB to +4dB Interface Features:

  • Stereo -10dB to +4dB interface
    Transformer isolated to eliminate noise
    Onboard hi-pass/low-cut filter
    Greater than 100dB of dynamic range
    Plug and play design makes it easy-to-use




Radial Engineering J+4 Stereo Line Driver -10dB to +4dB Interface

90 day warranty on footswitch and tubes. One year warranty on all other products.

Get your gear covered!

Now you can get added warranty protection for your new gear. Pro Coverage steps in where the manufacturer's "normal wear and tear" ends. Our PRO COVERAGE program offers you UPGRADED COVERAGE if your product ever fails!

Pro Coverage includes:

  • Accidental damage protection (new gear only)
  • Expedited Repair
  • Free Shipping (for returns or repairs)
  • 100% Coverage for Commercial Use
  • Extended Return Period
  • Extended Price Protection
  • No Lemon Guarantee
  • Free Transfer of Coverage to a new owner
  • Repair Costs Covered for up to 3 years from date of purchase
  • Repairs Can Be Authorized Toll-Free by Phone or the via the web
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Questions about the J+4 Stereo Line Driver -10dB to +4dB Interface (712959)


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