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Everything in Music Since 1958

Radial Engineering JDX48 Reactor Guitar Amp Direct Box

Sold out
Original price $125 - Original price $125
Original price
$125
Default Title: $125
Current price $125
About Inventory Status


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In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 4229 Howard Ave UNIT B. Kensington, MD 20895.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions


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Call or text us at 570-973-5291.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

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Pick Up The The Most Natural Sounding Amp Direct Box Ever - The Radial Engineering JDX48 Reactor Guitar Amp Direct Box

The Radial Engineering JDX 48 Reactor Guitar Amp Direct Box is a direct box designed to capture the explosive dynamics and warmth of an electric guitar amplifier by connecting between the guitar amp head and speaker cabinet. This delivers a sound that is similar to a well-placed microphone while eliminating the frustrating inconsistencies.

The design begins with 100% discrete class-A circuitry and a transformer-coupled 'reactive load' that captures both the sound from the amp head along with the back electromagnetic impulse from the loudspeaker. This produces a more realistic rendering than the usual resistive pad offered by other manufacturers. The signal is then processed via a carefully designed multi-stage filter to emulate the tone of a 4x12 half stack cabinet.

In use, the JDX 48 delivers greater consistency over a typical microphone as irregularities such as mic placement and varying acoustics no longer play the dominant role on stage. This is most appreciated when using in-ear monitors as the tone remains consistent from one show to the next, resulting in shorter setup times and a more comfortable audio feed for the artist.

Although originally designed for guitar, the JDX has also become a favorite on bass. The clarity and punch in the lower midrange delivers a tone that is reminiscent of an Ampeg SVT connected to an 8x10 cabinet. On guitar it sounds as if you have a Shure SM57 in front of a Marshall half-stack. This new version also offers greater power handling for 300 watt amps and extended low end for deep bass frequencies.



  • Captures sound of both the head and the cabinet
  • Delivers consistent tone - show after show
  • Works equally well on electric guitar and bass
  • Can be used with 48V phantom power or DC supply
  • XLR configuration: AES standard (pin-2 hot)
  • 300W AMP select for use with higher wattage amps.
  • FROM AMP connection for amplifier output.
  • TO SPEAKER connects your amp to the speaker through the JDX 48. Connection to a loudspeaker or a load box is mandatory. Please read the safety disclosure statement before connecting the JDX 48.
  • GROUND LIFT switch eliminates hum and buzz caused by ground loops.
  • PSU JACK optional connection for the included 15 volt DC power supply.
  • BASS EXT Boosts bottom end frequencies for bass.
  • XLR OUTPUT mic-level, 600Ω balanced XLR output connects to your mixing console.
  • 180° POLARITY Reverses pin-2 and pin-3 at the XLR output to phase align the
  • JDX 48 with a mic.
  • BOOKEND DESIGN creates a protective zone around the jacks switches.
  • CABLE CLAMP Secures cable in place.
  • FULL BOTTOM PAD keeps it from sliding around and provides isolation from electrified amplifier frames and handles.


  • Audio circuit type: Discrete Class-A - Transformer Isolated
  • Frequency response: Shaped for guitar use
  • Dynamic range: 114dB
  • Noise floor: -100dBu below 0dBu
  • Maximum input: 120W @ 8Ω
  • Maximum output: +14dBu (clip level)
  • Thermal input limit: +49 VAC (from amplifier)
  • Total harmonic distortion: <0.015% (+10dBu input @ 1KHz)
  • Inter-modulation distortion: 0.03% (+10dBu input @ 1KHz)
  • Input impedance: 15kΩ
  • Output impedance: 2kΩ (XLR out)

General  

  • Power: 48V phantom or +15VDC/400mA adapter Included 
  • Construction: 14 gauge steel chassis and outer shell
  • Finish: Durable powder coat


Manufacturer: Radial Engineering
Model: JDX-48
SKU: I376652-N-0-WHXA
UPC: 676101041374


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