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  • Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
  • 24/7 support when you need it.
  • Quick, easy, and frustration-free claims.
Cover this product:
$279.99
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FREE delivery Friday, May 17. Order within 8 hrs 13 mins
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$$279.99 () Includes selected options. Includes initial monthly payment and selected options. Details
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30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
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Returns
30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
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Support
Product support included
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country. Learn more
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3 Year Musical Instrument Accident Protection Plan

from Asurion, LLC
(153)
  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. If portable, drops, spills and cracked screens due to normal use are covered from day one. Malfunctions covered after the manufacturer's warranty.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.
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4 Year Musical Instrument Accident Protection Plan

from Asurion, LLC
(1401)
  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. If portable, drops, spills and cracked screens due to normal use are covered from day one. Malfunctions covered after the manufacturer's warranty.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.
Learn more

Asurion Complete Protect: One plan covers all eligible past and future purchases on Amazon

from Asurion, LLC
(692)
  • Buy a lot of stuff on Amazon? Tons of items eligible for coverage, from the latest tech like laptops, game consoles, and TVs, to major appliances, sporting goods, tools, toys, mattresses, personal care, furniture, and more.
  • Accidents happen. That’s why for your portable products we cover accidental damage from handling such as drops, spills and cracked screens. We also cover electrical and mechanical malfunctions, power surges, and wear and tear.
  • Past and future purchases covered. 30 days after you are enrolled, all eligible past purchases (up to 1 year prior to enrollment) and future eligible purchases made on Amazon will be covered by your plan as long as you are enrolled.
  • Fast, easy claims. Frustration-free claims, with most filed in minutes. We will fix it, replace it, or reimburse you with an Amazon e-gift card for the purchase price of your product (excluding tax). File at Asurion.com/amazon.
  • No hidden fees. For just $16.99 a month + tax you’re covered for up to $5,000 in claims per 12-month period. *THIS PROGRAM IS MONTH-TO-MONTH AND WILL CONTINUE UNTIL CANCELED* Coverage for all products ends 30 days after the plan is canceled. Cancel any time.
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Radial Engineering J+4 Stereo Line Driver -10dB to +4dB Interface

4.3 4.3 out of 5 stars 10 ratings
$279.99
FREE Returns
30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
| Product support included
What's Product Support?
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country.
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Purchase options and add-ons

Brand Radial Engineering
Compatible Devices Personal Computer
Number of Channels 2
Item Weight 0.01 Ounces
Operating System Windows

About this item

  • 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
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Radial Engineering J+4 Stereo Line Driver -10dB to +4dB Interface
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Sold by AVLGEAR and ships from Amazon Fulfillment.
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Radial Engineering J+4 Stereo Line Driver -10dB to +4dB Interface

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

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Product Description

The Radial J+4 Stereo Line driver lets you safely connect 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 fur...

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Customer reviews

4.3 out of 5 stars
4.3 out of 5
10 global ratings

Top reviews from the United States

Lester L. Bundrage
5.0 out of 5 stars Powerful tool for Keyboards
Reviewed in the United States on December 25, 2021
Verified Purchase
I like this product because it does a very good job of boosting the output gain on my Yamaha keyboard BEFORE it reaches the mixer. Plenty of gain. No more getting drowned out by other VERY LOUD instruments on stage.
Helpful
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Amazon Customer
5.0 out of 5 stars I am very pleased with the Radial Engineering products
Reviewed in the United States on February 14, 2017
Verified Purchase
I use the Radial Engineering J +4 line driver to control the volume of my turntable system. Pioneer PLX100 DJ turntable into the Radial Engineering J33 turntable DI that feeds the Radial Engineering J+4 to control the Dynaudio bm5mkIII speakers. I am very pleased with the Radial Engineering products.
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Wen Tan
5.0 out of 5 stars Well built
Reviewed in the United States on February 14, 2021
Verified Purchase
It looks very sturdy. The sound is great.
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Carl Frost
5.0 out of 5 stars Not cheap but road worthy
Reviewed in the United States on February 5, 2017
Verified Purchase
You could drive a truck over this box. Sounds fine, it's quiet and performs as advertised.
Helpful
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