User Manual for Radial Engineering JDI Duplex - Two Channel Professional Passive Direct Box with Jensen Transformers Click to enlarge the picture
Contents of the user manual for the Radial Engineering JDI Duplex - Two
- Product category: Direct Boxes Radial Engineering
- Brand: Radial Engineering
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Radial Engineering Direct Boxes
User manual for the Radial Engineering JDI Duplex - Two contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Radial Engineering product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Radial Engineering user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Radial Engineering product will considerably shorten its lifespan!
Product description The JDI Duplex from Radial Engineering is a two channel version of the JDI passive direct box that converts hi-impedance instrument signals to two balanced low-impedance outputs, allowing long cable runs without noise. The unit is ideally suited for all instruments including keyboards, bass guitar and acoustic guitars for use in studio, broadcast and live sound reinforcement. Because of the transformers, the JDI provides 100% isolation between the instrument input side and the balanced output, eliminating hum and buzz caused by ground loops. Passive DIs that use inexpensive iron or steel core transformers can degrade sound through phase shift at various frequencies, a phenomenon known as group delay. This has the effect of making bass sound indistinct, causing the mid-range to smear and lack punch. The JDI employs Jensen transformers with a nickel-laminated core which do not retain a memory or polarity. This reduces phase distortion, improves linearity and lowers harmonic distortion. Each channel provides a 15dB pad for high level instruments to avoid input distortion. Merge switches convert the thru outputs to a second input, allowing two signals, such as those from a stereo keyboard, to be summed to mono when input channel availability is limited. The unit is built to withstand the abuse of the road. The book-cover design features an internal 14-gauge steel skeleton that is corner welded to ensure the internal electronics will never be subjected to outside stress. The military grade PC board is mounted on steel pem nuts and the whole is then enclosed in a second steel casing. The passive design requires no power source.
- Dual channel, phase coherent professional direct box with 100% passive design and Jensen Transformer equipped
- Ultra linear performance from 10Hz to 40kHz
- Dual function inputs with two-channel merge
- Polarity reverse, ground lift and pad switches per channel
- Ultra-durable welded steel chassis with double sided printed circuit board
- No-slip bottom pad and protective channel for switches
UPC: 676101034093 In the Box Radial Engineering JDI Duplex - Two Channel Professional Passive Direct Box with Jensen Transformers Three (3) Year Transferable Warranty Table of Contents
- Ideal for acoustic guitars and basses, keyboards, modules and electronic drums
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Radial Engineering JDI Specs
| Input Connections || 2 x 1/4" TS phone |
| Output Connectors || 2 x XLR |
2 x 1/4" TS phone Thru
| Input Level || +19dB |
| Output Level || Not specified by manufacturer |
| Controls || -15dB pad |
Ground lift switch
Merge of Input and Thru
Parallel 12" speaker emulation switch
| Frequency Response || 10Hz to 40kHz |
| Noise || SNR: 119dB |
| Power || Passive |
| Dimensions (WxDxH) || 8 1/2" x 5 7/8" x 3 1/4" (shipping) |
| Weight || 3.15 lbs (shipping) |
| Specialties || Merge function converts the input and thru output jacks on each channel to left and right inputs and mixes them to mono at the XLR outputs |
| Package Weight || 2.78 lb |
| Box Dimensions (LxWxH) || 11.75 x 5.05 x 2.65" |
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