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Vocal and instrument processors

Radial J+4 - Active -10dB to +4dB stereo line driver with transformer isolated inputs

Product Code: RA-J+4

Brand
Radial Engineering
RRP $529.00
*Recommended Retail Price may not be a true representation of the market price
 
Unit of Measure
EACH

 
3 Year
Features
UPC 6 761010 3969 2 Radial Part No. R800 8015

Technical Specifications
Brands Radial Engineering
Product type Splitters
  • Details
  • Downloads
  • Ordering

Balanced -10dB to +4dB Signal Driver

The J+4™ is a stereo interface designed to accept unbalanced low output devices such as instruments, computers or mobile devices and boost their signal to a balanced +4dB level for connection to professional audio recording and playback equipment.

  • Stereo preamp boost signals to +4dB balanced line level
  • Increases gain for low output instruments & music players
  • Transformer isolated 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 boost nearly any stereo signal up to a +4dB balanced line level output, which can be sent over long distances without signal loss and connected directly to pro audio equipment such as mixers or recording interfaces. Multiple input connectors are available for integration with a variety of devices, including a stacked set of ¼" jacks for DJ mixers or keyboards, RCAs for CD players and a mini 3.5mm jack for smartphones and tablets. The J+4 delivers exceptional sonic performance, and is able to provide clean gain and eliminate noise by combining the advantages of active signal buffering with transformer isolation.

J+4 Applications

Using the J+4 to boost a stereo signal

Increasing the output from a CD player to a +4dB balanced signal is easy. Just plug into the RCA inputs, adjust the volume level and the J+4 does all the work. Transformer isolation eliminates ground loops for quiet performance every time.

Using the J+4 with your computer

Today, computers and laptops are being used in all types of audio-visual systems. The J+4 makes it easy to interface with a built-in 3.5mm (1/8") TRS jack. Plug in and the J+4 will boost and balance the signal and deliver a professional line level signal.

Using the J+4 with a keyboard

Many keyboards and synthesizers do not have enough output to effectively drive the line level input on a mixer. This is particularly troublesome on older keyboards such as a Rhodes piano. The J+4 makes it easy with built-in ¼" inputs and balanced XLR outs.

Videos

  • Peter Janis explains the J+4 Signal Driver

Artists

Jimmy Douglass

Justin Timberlake, Rolling Stones, Jay-Z, Led Zeppelin, Foreigner, AC/DC

"The Radial J+4 sounds great, is well built and practical. It seems like somebody actually thought about making a good product and then actually did... Great stuff!"

James Finnerty

City & Colour, Arkells, Lights

"I’ve been using Radial products for over ten years because they sound fantastic and the build quality is top notch. There are very few times during a recording/mix session or a live show when I don’t have a piece of Radial gear in the chain."



Product Documents

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ORDER PROCESSING

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We ship using Mainfreight & Bascik for Screens and NZ Post for all other orders. We deliver New Zealand-wide to residential, business but do not ship to PO box addresses.

FREIGHT CHARGES

Standard Orders:

    • Orders valued over $250 ex GST: Freight-Free (excluding bulky or palletised items)
    • Orders valued under $250 ex GST: Flat shipping fee of $20.00 ex GST applies

Dropship Orders:

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Bulky Items, Fragile Freight & Palletised Orders:

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Note: For all bulky, fragile & palletised orders, please include the following information when placing your order, failure to do so may result in a redelivery fee:

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ESTIMATED SHIPPING TIMES

    • Auckland (Metro): Next-day delivery (excluding rural areas)
    • North Island: 2-3 business days (excluding rural areas)
    • South Island: 3-5 business days (excluding rural areas)
    • Special Requests/Priority Services: Additional $50 surcharge (excluding GST)

Bulky Items & Palletised Orders: (Screens, Primacoustic, Bulk Shipping)

    • Auckland (Metro): Next-day delivery (allow up to 2 days)
    • North Island: 2-3 business days
    • South Island: 3-5 business days (depending on location)

Displays & Sensitive Freight: (Newline panels & large fragile items)

    • Auckland (Metro): 2 business days (allow up to 5 days)
    • North Island: 4-5 business days
    • South Island: 3-5 business days (depending on location)

IMPORTANT NOTES

    • Delivery times are estimates and may vary depending on courier schedules, remote locations, and public holidays
    • Rural areas may experience longer delivery times
    • Special requests, priority handling, or additional services will incur an extra $50 ex GST surcharge
    • Amber Technology reserves the right to alter freight charges at any time in response to changing market conditions or circumstances Amber deems to be exceptional

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WARRANTY

Our goods come with guarantees that cannot be excluded under the New Zealand Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. All items purchased from Amber Technology will be covered under warranty. The duration and terms of this warranty are specified by the manufacturer unless otherwise stated. Warranty information is available on the individual product listings on this site. Refurbished items will include a 12-month warranty unless otherwise stated. For warranty repairs for all brands, please download our Service Form and email to service@amber.co.nz. An RMA number will be issued for the repairs to commence. Do not send stock before receiving an RMA number. Further instructions will be emailed to you following receipt of the form.

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TECHNICAL SUPPORT

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RETURNS

Please Contact Us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us.