J-Rak 4 - Audio accessory Radial Engineering - Free user manual and instructions

Product Type	Rack Mount Audio Accessory
Brand	Radial Engineering
Model	J-Rak 4
Rack Size	1U
Width	19 inches (standard rack width)
Depth	6.5 inches (165 mm)
Height	1.75 inches (44.5 mm)
Weight	2.2 lbs (1.0 kg)
Material	Steel chassis with black powder coat finish
Compatibility	Accepts up to 4 Radial single-slot modules (e.g., JDI, J48, JDV)
Mounting Hardware	Includes rack screws and module securing screws
Power Supply	Passive (no external power required)
Warranty	3 years limited warranty
Intended Use	Organize and mount Radial DI boxes or other compatible modules in a standard 19-inch rack
Installation	Simple drop-in installation; no soldering or special tools required
Cleaning	Wipe with dry cloth; avoid solvents
Repairability	Replaceable screws and parts; contact Radial for service
Compliance	RoHS compliant

Frequently Asked Questions - J-Rak 4 Radial Engineering

What modules are compatible with the J-Rak 4?

The J-Rak 4 accepts any Radial single-slot module, such as the JDI, J48, JDV, and similar products. It holds up to four modules.

Does the J-Rak 4 require power?

No, the J-Rak 4 is a passive rack mount tray and does not require any external power supply.

What is the rack size of the J-Rak 4?

It occupies 1U (1 rack unit) in a standard 19-inch rack.

How do I install modules in the J-Rak 4?

Simply slide each module into the allocated slot and secure it with the provided screws. The tray itself is mounted with standard rack screws.

Is the J-Rak 4 shielded or does it provide isolation?

The steel chassis provides basic RF and magnetic shielding, but individual modules handle hum and noise rejection.

Can I mix different Radial modules in one J-Rak 4?

Yes, you can mix and match any single-slot modules as long as they fit the standard size.

Does the J-Rak 4 come with cables or connectors?

No, the J-Rak 4 only includes mounting hardware. Cables and connectors must be purchased separately.

What is the weight capacity of the J-Rak 4?

It can safely hold up to 4 standard modules (approximately 2-3 lbs total weight).

Can I mount the J-Rak 4 in a slant rack or desktop rack?

Yes, it is compatible with any standard 19-inch rack including flat, slant, or desktop configurations.

How do I clean the J-Rak 4?

Use a dry soft cloth to remove dust. Avoid using any moisture or chemical cleaners to prevent damage to the finish.

USER MANUAL J-Rak 4 Radial Engineering

Front view of a black industrial rack unit with metal grating and mounting holes (no visible text or symbols)

Order No. R800 1018

Exterior view of a black industrial rack unit with mounting holes and a visible brand logo (RAK4, Radial)

Order No. R800 1016

User Guide

Rackmount for Radial Direct Boxes

JRAK ^TM 8

Congratulations and thank you for purchasing the Radial J•Rak 8. The J•Rak 8 is a 19" rack adapter that has been designed to work with products like the Radial JDI, Radial J48 and the many other Radial products that employ the same bookend designed enclosure.

Although the J-Rak 8 is a straightforward device, we invite you to take a few moments to read through this manual and familiarize yourself with this versatile product. Should you have any questions or comments, please feel free to contact us by sending an email to [e-mail] or browse our web site at www.radialeng.com for the latest updates and applications.

Enjoy!

PRODUCT DESCRIPTION

The Radial J·Rak 8 requires two rack spaces (3 ½") and allows up to eight Radial products to be rack-mounted in a standard 19" rack.

The J•Rak 8 is designed to allow touring companies to make better use of their DI box inventory by allowing stand-alone units to be converted to rackmounted DIs for applications like keyboards. A wide range of Radial interface and mic-splitter products are compatible with the J•Rak 8 making it possible to quickly create a custom rack.

A strong advantage for the J-Rak 8 is that you get to choose what connectors face front. Before you start loading up DIs take a minute to consider how you will connect to them. Depending on your situation you may prefer to have the inputs face front. This would be best for studio applications where instruments are often connected and disconnected during a session.

GUITARS AND BASS The 1/4" inputs face front allowing easy connection for instruments.

If you're using the J•Rak 8 in a concert touring situation then you may want the outputs to face front for quick connection to a microphone snake. The J•Rak 8 lets you choose the orientation for each slot so you may want to think about which arrangement is best for your setup.

graph TD
    A["SYNTH 1"] --> B["J-RAK"]
    C["SYNTH 2"] --> B
    D["..."] --> B
    E["..."] --> B
    F["..."] --> B
    G["..."] --> B
    H["..."] --> B
    I["..."] --> B
    J["..."] --> B
    K["..."] --> B
    L["..."] --> B
    M["..."] --> B
    N["..."] --> B
    O["..."] --> B
    P["..."] --> B
    Q["..."] --> B
    R["..."] --> B
    S["..."] --> B
    T["..."] --> B
    U["..."] --> B
    V["..."] --> B
    W["..."] --> B
    X["..."] --> B
    Y["..."] --> B
    Z["..."] --> B
    AA["..."] --> B
    AB["..."] --> B
    AC["..."] --> B
    AD["..."] --> B
    AE["..."] --> B
    AF["..."] --> B
    AG["..."] --> B
    AH["..."] --> B
    AI["..."] --> B
    AJ["..."] --> B
    AK["..."] --> B
    AL["..."] --> B
    AM["..."] --> B
    AN["..."] --> B
    AO["..."] --> B
    AP["..."] --> B
    AQ["..."] --> B
    AR["..."] --> B
    AS["..."] --> B
    AT["..."] --> B
    AU["..."] --> B
    AV["..."] --> B
    AW["..."] --> B
    AX["..."] --> B
    AY["SYNTH 1"] --> AZ["J-RAK"]
    CYN["SYNTH 2"] --> AZ
    BJ["J-RAK"] --> AZ

KEYBOARD RACKS The XLR outputs face front for connection to mic snakes and mixing consoles.

As with all Radial products, the J-Rak 8 features heavy-duty construction and a baked enamel ✉nish for years of trouble-free performance. The J-Rak is also supported by the Radial 3-year transferable warranty to protect against manufacturing defects.

SETTING UP THE J·RAK 8

Step One: Remove the Shell

To begin, remove the protective outer 'book-end' shell from the Radial product by unscrewing the four (4) hex #6/32 screws. A hex allen key is provided for these screws. Do not discard the screws or shells. Store them in a safe place in case you want to restore the product to its original con ^☒ guration.

Two electronic devices with visible internal components and a hand adjusting a component (no text or symbols)

Step Two: Load into Slot

With the outer shell removed, slide the enclosure into the front of the J•Rak 8 slot. Ensure the open side is facing up as pictured below.

Hand inserting a JRAK device into an electronic control box (no visible text or symbols)

Step Three: Rear Screws

Once the enclosure is seated in the J•Rak 8 locate the two screw holes for the slot on the top near the rear edge. Sixteen Philips head screws are provided to secure enclosures in place. Insert two screws per slot. Repeat the procedure for the other slots. The J•Rak 8 is now ready to mount in your 19" rack.

Hand using a screwdriver to adjust or install an electronic device rack (no visible text or symbols)

JRAK4

Congratulations and thank you for purchasing the Radial J•Rak 4. The J•Rak 4 is a 19" rack adapter that has been designed to work with products like the Radial JDI, Radial J48 and the many other Radial products that employ the same bookend designed enclosure.

Although the J-Rak 4 is a straightforward device, we invite you to take a few moments to read through this manual and familiarize yourself with this versatile product. Should you have any questions or comments, please feel free to contact us by sending an email to [e-mail] or browse our web site at www.radialeng.com for the latest updates and applications.

Enjoy!

PRODUCT DESCRIPTION

The Radial J·Rak 4 requires one rack space (1.75") and allows up to four Radial products to be rack-mounted in a standard 19" rack.

The J•Rak 4 is designed to allow touring companies to make better use of their DI box inventory by allowing stand-alone units to be converted to rackmounted DIs for applications like keyboards. A wide range of Radial interface and mic-splitter products are compatible with the J•Rak 4 making it possible to quickly create a custom rack.

A strong advantage for the J-Rak 4 is that you get to choose what connectors face front. Before you start loading up DIs take a minute to consider how you will connect to them. Depending on your situation you may prefer to have the input panel face front. This would be best for studio applications where instruments are often connected and disconnected during a session.

GUITARS AND BASS The 1/4" inputs face front allowing easy connection for instruments.

If you're using the J•Rak 4 in a concert touring situation then you may want the XLR outputs to face front for quick connection to a microphone snake. The J•Rak lets you choose the orientation for each slot so you may want to think about which arrangement is best for your setup.

graph LR
    A["SYNTH 1"] --> B["J-RAK"]
    C["SYNTH 2"] --> B
    D["..."] --> B
    E["..."] --> B
    F["..."] --> B
    G["..."] --> B
    H["..."] --> B
    I["..."] --> B
    J["..."] --> B
    K["..."] --> B
    L["..."] --> B
    M["..."] --> B
    N["..."] --> B
    O["..."] --> B
    P["..."] --> B
    Q["..."] --> B
    R["..."] --> B
    S["..."] --> B
    T["..."] --> B
    U["..."] --> B
    V["..."] --> B
    W["..."] --> B
    X["..."] --> B
    Y["..."] --> B
    Z["..."] --> B
    AA["..."] --> B
    AB["..."] --> B
    AC["..."] --> B
    AD["..."] --> B
    AE["..."] --> B
    AF["..."] --> B
    AG["..."] --> B
    AH["..."] --> B
    AI["..."] --> B
    AJ["..."] --> B
    AK["..."] --> B
    AL["..."] --> B
    AM["..."] --> B
    AN["..."] --> B
    AO["..."] --> B
    AP["..."] --> B
    AQ["..."] --> B
    AR["..."] --> B
    AS["..."] --> B
    AT["..."] --> B
    AU["..."] --> B
    AV["..."] --> B
    AW["..."] --> B
    AX["..."] --> B
    AY["SYNTH 1"] --> AZ["J-RAK"]

KEYBOARD RACKS The 1/4" inputs face toward the rear for connection to rackmounted modules.

As with all Radial products, the J•Rak 4 features heavy-duty construction and a baked enamel ☑nish for years of trouble-free performance. The J•Rak 4 is supported by the Radial 3-year transferable warranty to protect against manufacturing defects.

SETTING UP THE J·RAK 4

Step One: Remove the Shell

To begin, remove the protective outer 'book-end' shell from the Radial product by unscrewing the four (4) hex #6/32 screws. A hex allen key is provided for these screws. Do not discard the screws or shells. Store them in a safe place in case you want to restore the product to its original con ^® guration.

Two electronic devices with visible internal components and a hand adjusting their top component (no text or symbols)

Step Two: Load into Slot

With the outer shell removed, slide the enclosure into the rear of the J•Rak 4 slot.

Close-up of hands installing or adjusting a mechanical component with a connector (no visible text or symbols)

Step Three: Rear Screws

Once the enclosure is seated in the J•Rak 4 locate the two screw holes for the slot on the top. Sixteen Philips head screws are provided to secure enclosures in place. Insert two screws per slot. Repeat the procedure for the other slots. The J•Rak 4 is now ready to mount in your 19" rack.

Close-up of a hand using a screwdriver to adjust a component on an electronic device (no visible text or symbols)

THREE YEAR TRANSFERABLE LIMITED WARRANTY

RADIAL ENGINEERING LTD. ("Radial") warrants this product to be free from defects in material and workmanship and will remedy any such defects free of charge according to the terms of this warranty. Radial will repair or replace (at its option) any defective component(s) of this product (excluding ☑ish and wear and tear on components under normal use) for a period of three (3) years from the original date of purchase. In the event that a particular product is no longer available, Radial reserves the right to replace the product with a similar product of equal or greater value. In the unlikely event that a defect is uncovered, please call 604-942-1001 or email [e-mail] to obtain an RA number (Return Authorization number) before the 3 year warranty period expires. The product must be returned prepaid in the original shipping container (or equivalent) to Radial or to an authorized Radial repair center and you must assume the risk of loss or damage. A copy of the original invoice showing date of purchase and the dealer name must accompany any request for work to be performed under this limited and transferable warranty. This warranty shall not apply if the product has been damaged due to abuse, misuse, misapplication, accident or as a result of service or modification by any other than an authorized Radial repair center.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DESCRIBED ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF THREE YEARS. RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE OF THIS PRODUCT. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH MAY VARY DEPENDING ON WHERE YOU LIVE AND WHERE THE PRODUCT WAS PURCHASED.

For product compatibility information refer to www.radialeng.com