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Radial Engineering MKV Super Direct Box

 
  • Dale #:

    RADI-JDVMKV
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Description

The Radial JDV Mk5 is a high performance active direct box and preamp with two inputs that enables the user to seamlessly transition from one instrument to another while being able to optimize the signal chain no matter what the source. Extra features include fully variable high-pass filters on e... Read More

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Description

The Radial JDV Mk5 is a high performance active direct box and preamp with two inputs that enables the user to seamlessly transition from one instrument to another while being able to optimize the signal chain no matter what the source. Extra features include fully variable high-pass filters on each channel to eliminate excessive low frequency resonance, easy-read LED level meters, Jensen Transformer isolated outputs to eliminate hum and buzz caused by ground loops and a +4dB line level output for direct recording. Switching between channels may be done using a front panel switch or via the optional JR-2 remote control.

Features:

  • 100% discrete class-A active direct box
  • Feed forward design - no negative feedback
  • Drag control load correction for natural tone
  • Huge 30-Volt rails for exceptional headroom

The design begins with 100% discrete electronics and a unique class-A circuit with zero phase-cancelling negative feedback front-end. This is augmented with Drag control load correction that lets you optimize the impedance that is being applied to the pickup along with extra rail voltage for an abundance of headroom. The result is virtually zero harmonic, phase and cross-point distortion resulting in the most natural rendering without coloration or artifact of any type.

Central to the design is the JDV's ability to handle any type of instrument. Input-1 is equally well suited for magnetic pickups or active instruments and is equipped with a balanced mic input with 48V phantom to accept instrument-mounted condenser mics. Input-2 adds another dimension with a selectable 10 meg-ohm input to properly load piezo transducers. Both inputs may be active at one time and mixed together using the front panel controls. These can then be phase-aligned using the built-in Radial Phazer for what can only be deemed the most natural sounding reproduction of an acoustic instrument ever.

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Product Specs

Instrument input circuit:
Instrument clip level:
without negative feedback
+18dBu
Microphone input circuit:
Microphone clip level:
Low noise integrated circuit 
-11dBu
Frequency response 20Hz - 20KHz
Dynamic range: 107db
Equivalent input noise: -90dbu
Common mode rejection: -80dB
THD+N: 0.004%
Clip level - output: +17dBu
Gain - instrument input: +25db
Gain - line level boost : +20dB
Gain - microphone input: +25db
Input Impedance: Drag on: Variable from 22K Ω ~ 500K Ω
Drag off: 10M Ω
Output impedance at XLR: 400 Ω
Instrument inputs: 1/4" selectable A or B with front panel switch or remote
Blend: Mixes both A and B channels together
Drag Control: Load correction for 1/4" instrument inputs
High-pass filter: Variable from 5Hz ~ 500Hz @ -3dB
Remote footswitch: Optional JR-2 for mute and channel select
Mic input: 1/4" TRS on channel-A
Phantom power: 48V on mic input, side access switch
Phase adjustment: Phazer on channel-B, variable from 0° ~ 360°
Throughput: Buffered THRU with direct or isolated setting
XLR output: Balanced mic level with 20dB line booster switch
Isolation: Transformer isolation option for XLR output
180° Polarity: Reverses pin-2 and pin-3 on the XLR output
Ground lift: Disconnects pin-1 at XLR output
XLR configuration: AES standard pin-1 (ground), pin-2 (+), pin-3 (-)
Power: External 100V - 240V AC with 48V phantom
Construction: 14-gauge steel chassis and outer shell
Finish: Durable powder coat
Size: Size: 5" x 6.25" x 2" (127 x 159 x 51mm)
Weight: 2.80lbs (1.28 kg)
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable

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