Radial JDI Duplex mk4 Stereo Direct Box

Le doy 4 estrellas porque el producto llego un poco maltratado (Caja), pero es un buen producto, tardo un poco en llegar. Pero el producto en general es de lo mejor que he tenido

I use this product every week, sometimes several times a week. It is probably the most used DI box I have. Often I use if for keyboardists onstage to connect keyboards to the audio snake onstage, or my digital stage box. One thing I really like about this particular D.I. is that I can actually connect two stereo keyboards to it with the first stereo keyboard into the 1/4" inputs pair and the second stereo keyboard into the 1/4" thru inputs pair and then I engage the recessed SUM/MONO switch on each channel of the the Radial Duplex to combine the two stereo inputs (lefts are combined and rights are combined) which at the board gives me It saves me from having to have a submixer onstage. Another thing I like about this DI box, I had one gig where the keyboardist asked me if I minded playing his songs from his iPhone. I said OK, just connect this 1/8" TRS cable to the Radial JDI Duplex DI at your keyboard. And we had pre-show and post show music then. There are so many other ways you can use this D.I. box it is extremely flexible. I have found the sound quality to be excellent. It is pricey, but the build quality and the sound quality are worth it especially if your income depends on that. I don't think there's another DI box out there like this one.

The product was exactly what they said it was, and works great.It is built like a tank.Delivery was quick and painless.Highly recommend both product and supplier

DI de très bonne qualité avec un boitier d'une solidité impeccable . Grande versatilité sur le plan de la connectivité.

Excellent product! Just wish I could get a stereo monitor mix out of Duplex while sending MONO SUM to FOH. Am I missing something here?

Typical Radial - every iteration improves on their last model Superb.

What a swiss army knife of break out boxes. Does it all and they some. Great electronics and clean sound! Highly recommend!

I have numerous pedals, synths and even iPads that I run through this to record balanced. It gives you a balanced mic level output perfect to record through my UA 4-710d. A must for quiet, noiseless unbalanced recording.

In my opinion and experience this is the best direct interface box I have ever used. I cannot detect any coloration of sound. Highly recommended.

Cleans up sound like nobody's business. Excellent unit and the fact that it has multiple input options makes it even better.

Great DI-Box! You will not be disappointed if you purchase it. The "Duplex" doesn't color the sound like many other boxes. It's worth every penny!! I use a PSA-1 -> Duplex ->PA and it sounds great!

There are better boxes out there, but they come with that tradition "better price" which could easily push you over $1000. This is Radial's top of the line stage class passive DI. It's the JDI (Jenson Direct box) Duplex (for stereo applications.What is it?If your not familiar with DI's (aka Direct Boxes) they are a device that electricaly isolates an unbalanced line level input and transforms it to a balanced line level output. It does this thru a transformer and (without getting into the physics) as such protects both lines from one another while at the same time elemintaing the possibility for problematic ground loops. Also it protects equipment from mismatched levels and signals that could damage with the device or the mic preamp.Why do you need one?If you were to just "plug" an instrument such as a guitar (which uses unbalanced line level) into a mic line (which is a balanced AND in many cases POWERED line) the best thing that can happen is you'll get signal dropout, noise, hum, distorsion, ect. The worst that could happen is a potentially powered line could cook your output on your instrument. This often the case where people plug iPods or laptops into powered stage mixers or PA lines. The small voltage of a small electronic device becomes overwhelmed and shorts out due to the MUCH higher voltage and current of the PA's Phantom Powered lines. Even if the PA your wiring into is a traditional PA (lacking powered mic lines) with a pre-amp to boost the passive signals there's actually a risk to the PA with unbalanced sources. The DI converts the signal to be safely compatible and protects all equipment from the issues at either end. Also transforming a signal to a "balanced line level" creates a stable signal that can be sent long distances and can be easily boosted at the end while at the same time removing line noise caused by cabling acting as an antenna.This box is part of Radial's JDI line that uses genuine Jensen transformers for soft and subtle sound curves. Radial makes more affordable models that also sound terrific. However I wanted an "Any Situation" type box. This box is a stereo box which fits that bill nicely. It is acutally two seperate mono JDI's, each with their own transformer, in a single case. You could run two individual mono inputs and outputs if you wanted. But by pluging the individual right and left channels of a stereo device into each half of this box then running two output lines to the PA you preserve the stereo signal.I/OOn the rear of the box each channel has a 1/4" input jack and a 1/4" thruput jack (for running a thru line to stage monitors). There's a "mix button" that will allow the thruput line to become a second input line for mixing stereo signals to mono. Each channel also two RCA inputs for mixing auido out of digital devices line CD/DVD, ipod, laptop, ect. The pairs for each channel are mixed to mono at output. Being a stereo box you might wonder why you would mix back to mono. Perhaps you only wish to run one line back to to PA mixer. The front of the unit has one XLR output and one XLR input for each channel. So as I said this can work as two standalone mono boxes. What if you want stereo? One the L channel to an input on channel 1 (1/4" in or RCA doesn't matter) then R channel to channel 2. Then run two XLR outputs to your PA mixer or console.Other nice featuresThis unit features all metal construction which creates an electromanetic cage to shield it from outside interference. NICE if you standing next to HUGE stage moniters driving enormous magnets with tons of power. Each cannel has a high pass filter switch and a pad switch for devices. The pad is nice for digital devices like CD, ipod, ect. It also has a polarity flip switch for each output to eleminate hum caused by import sound devices. And lastly a ground lift switch to further isolate ground loops.As I said this unit is about as good as it gets for passiv DI's. There are such things as Active DIs but that's a whole different animal. For most users, a passive is going to be the best choice. And as I said there are other models that aren't quite so pricey. I'll recommend a few. If your application like mine is primarily AV presentation then this box is actually a bit overkill. But like I said I wanted that "super utility" aka swiss army knife ablity coupled with true stereo and mono options. For just mono AV work I can recommend the Radial ProAV1. That line also contains several inexpensive stage type boxes. A step between this model and those I just mensioned is the Radial JDI. (Again this is the JDI duplex) It's the same technology and construction but at th same time is a mono box. It still has the stereo to mono mix feature as well. All will suit you well and sound great on systems big and small.