The Radial J48 has been designed from the ground up to deliver the most natural tone. As a direct box manufacturer, we do not believe it is our task to alter the sound of your prized '1962 Fender Jazz Bass', but retain and transfer the true character of the instrument to the mixing console without adding distortion or introducing artifact. This design philosophy has gained a tremendous following from many of the world's most demanding musicians.Using only 48V phantom power, the Radial J48 is an active direct box that produces an exceptionally linear response that extends from 20Hz up to well above 40kHz. Low distortion of all types is achieved via a unique digital switching power supply that raises the internal operating rail voltage for added headroom and improved signal handling. The results are truly amazing. The J48 delivers an ideal even-order harmonic cascade and a sonic performance that outperforms DIs costing several hundreds more.And like all Radial products, the J48 is both feature-rich for studio and made tough to handle the road. This includes a -15dB input pad to tame extra loud signals, 180-¦ polarity reverse for feedback control on stage and a ground lift to help reduce hum & buzz caused by ground loops. Special features include a merge function that elegantly mixes left-right signals to mono without phase cancellation. To minimize resonant feedback with acoustic instruments, the J48 is also equipped with an 80Hz high-pass filter (low-cut). When engaged, this also increases headroom by eliminating unneeded bass frequencies.Radial's innovative book-end design protects switches and connectors from abuse while the internal I-beam construction eliminates stress on the PC board. This serves to reduce solder joints from going 'cold' and delivers trouble-free performance for years. A full-bottom no-slip pad provides mechanical and electrical isolation while providing plenty of 'stay-put' for rockin' stages!The Radial J48 is used by artists as diverse as acoustic guitarist Tommy Emmanuel; super-star engineer Joe Chiccarelli; and one of the most successful bands of all time Fleetwood Mack. The Radial J48... the world's finest 48V phantom powered active direct box.

GAK is one of the UK's Largest Independent Musical Instrument and Pro-Audio Retailers. Based in Brighton, one of the UK?s musical hotbeds, GAK caters to musicians, DJs, producers, and podcasters all over the world. With over three decades of service and an experienced team of specialists, GAK is well-equipped to help you find your next purchase.

Never heard of us? Here's what you need to know...

  • We have been proudly supporting the music scene for over 30 years, both online and through our famous Brighton store.
  • GAK?s Brighton megastore is open 7 days a week, with stock from hundreds of popular brands, as well as GAK-branded instruments and accessories, made for musicians of all abilities and interests.
  • Our expert team is always on hand to provide you with reliable advice and support.
  • Well-established and knowledgeable mail order team.
  • GAK?s education department supports schools, colleges, universities, and educational institutions across the UK.

Our eBay team can be contacted through the 'Ask a Question' button, which can be found on any of our product listings.

You can also email or call us using the information provided at the bottom of this page.

Our office is open 9:30 am - 5:30 pm, Monday to Friday.

We offer a 30-day return policy on all of our products. If you would like to return your purchase, please initiate a return via the eBay Orders tab.

If you believe your item is faulty, please don't hesitate to get in touch with us.

We aim to ship all orders placed before 1pm on the same working day and tracking information is always provided at the point of dispatch.

  • All UK orders will be shipped with our domestic couriers; DPD, FedEx, DHL (UK Mail) and the Royal Mail. Tracking information is provided for all orders.
  • All orders sent outside of the UK are shipped using eBay's Global Shipping Program. More information on this can be found here.