User Guide - Radial Engineering
Contents
1. Radial engineering a ge OD a PRO DI DIRECT Box PRO D2 STEREO DIRECT Box maas te Comme 3 g He PASSIVE DIRECT BOX mets B GRagior USER GUIDE cu ma A B j J LS 8 Radial Engineering 1638 Kebet Way Port Coquitlam BC V3C 5W9 tel 604 942 1001 fax 604 942 1010 email info radialeng com web www radialeng com PRO DI AND PRO D2 USER GUIDE TABLE OF CONTENTS PAGE Introduction AE TE i ae ern ee De Ed eas 1 Features Making Connections snein eaa aaie Re amping with the PRO DI Frequently asked questions ie ee ee RR RA ee ee Block diagram and specifications ees Re ee 5 Warranty is EE a ee Dee Se SE Ge EEU ee de Ge Back cover This manual covers the single channel PRO DI and the stereo two channel PRO D2 As both devices are virtually identical this manual will discuss the PRO DI WELCOME Congratulations on your purchase of the Radial PRO DI or PRO D2 direct box one of the most versatile and useful pieces of equipment you will likely ever own Why do we say this Simple a good passive direct box can often find its way into all kinds of applications and be a real problem solver for both live PA systems and studio recording For example the PRO DI can be used to eliminate noise split signals convert unbalanced lines to balanced and can be used backwards to send pre recorded signals to a guitar amp for an effect called re amping As with all Radial products ev2. IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF THREE YEARS RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FORANY SPECIAL OR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF LOSS ARISING FROM THE USE OF THIS PRODUCT THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE OR PROVINCE TO PROVINCE Radial Radial Engineering 1638 Kebet Way Port Coquitlam BC V3C 5W9 tel 604 942 1001 fax 604 942 1010 email info radialeng com web www radialeng com PRO DI and PRO D2 Manual V1 1 part R870 1095 00
3. are connecting electronic instruments like guitar bass keyboard and drum machines directly to a PA or recording system Because the output of the PRO DI matches that of a typical microphone the PRO DI is perfectly suited for use in live sound and recording stu dio systems where microphone signals are put through long cable systems to a mixing console and where all signals are balanced to keep noise down The cool thing about transformers is that they not only stop noise caused by ground loops they can be connected to work in both directions In other words your PRO DI can convert a hi Z unbalancea input to a low Z balanced microphone signal typical use or it can do it in reverse and convert a low Z balanced microphone signal to a hi Z unbalanced output Connecting the PRO DI in reverse you could for instance take the balanced output from a mixer and send it to a DVD recorder for proper impedance and level matching or take a pre recorded track from a digital workstation and send it to a guitar effect pedal for re amping effects A good passive DI can be used to inter face all kinds of audio equipment and can solve many impedance and noise problems Radial Engineering 1 PRO DI User Guide Radial FEATURE SET The Radial PRO DI is a very simple yet effective device It features a 4 input connector that connects to the source or instrument a thru put connector that connects the instrument to the amplifier and fin
4. using a high quality direct box is lower noise and proper impedance matching This will result in better sound especially when connecting to professional audio equipment that accepts balanced signals and or when the instru ment signal must travel through cables longer than 20 feet to a mixing console heard active direct boxes can be better than passive Is this true Both active Dis and passive Dis have their place in professional audio just like condenser and dynamic mics do Active Dis Radial Engineering 4 PRO DI User Guide Radial can have more reach and enhance the sound of some instruments Passive DIs tend to sound more down to earth and less colored than active Dls The real advantage of passive Dls over active ones is that they eliminate hum amp buzz caused by ground loops by using a transformer to isolate the input signal from the output Can I use a piezo pickup with the PRO DI If your piezo equipped instrument has it s own pre amp and battery you can use the PRO DI with excellent results If your piezo equipped instrument does not have a pre amp then you really need to have a higher input impedance to get the most out of a piezo without a pre amp The Radial JDV has a 4 meg ohm input impedance that is perfectly suited for these types of pickups BLOCK DIAGRAM AND SPECIFICATIONS PRO DI PRO D2 PRO DI and PRO D2 Specifications 20Hz to 20kHz 2 5dB 0 01 from 20Hz to 20kHz 140K ohms with 1kH
5. ally a low impedance balanced XLR output connector that provides a direct and transformer isolated signal to the mixer A 15dB input PAD switch and output ground lift switch are also available to process the signal 1 4 hi Z Instrument input Ground lift connection for instruments lifts ground from pin 1 like guitar and bass on the XLR output XLR output balanced low Z mic level output Rugged packaging 14 gauge steel enclosure double sided PC board and a full bottom foam pad 15dB PAD Instrument thru put reduces input level to prevent distortion connect to on stage from ultra high output devices amplifier Radial Engineering 2 PRO DI User Guide Radial MAKING CONNECTIONS Using the Radial PRO DI is easy Before connecting start by making sure all volume levels are set to zero and the audio system is turned off This will avoid any loud pops in your sound system that could cause system damage The PRO DI does not require any power and it will ignore the phantom power from your mixer if it is turned on Begin by connecting the instrument or source device to the INPUT connector on the PRO DI The THRU connector would be used to connect the signal from the instrument to the musician s stage amplifier For line level sources the THRU con nector may be used to feed a second mixer recorder or monitor speaker Finally connect the PRO DI s LOW Z OUT to the microphone input of a mixing console or other suitable de
6. e tracks Now take the clean recorded track and send it back through the PRO DI in reverse To do this you will have to get a female to female XLR turn around adaptor as you will be connecting the output of your mixer to the XLR OUTPUT of the PRO DI Keep the mixers output level low to avoid saturating the PRO Dl s transformer which would cause distortion Now simply connect the INPUT remember we re connecting this in reverse on your PRO DI to your guitar amplifier and or effect pedals inputs Using your PRO DI in reverse to re amplify your sound can be great fun and adds tons of creative options to a recording This now lets you listen to various distorted sounds and create new tones while you are sitting in front of your studio monitors FAQ Why is the PRO DIs output not as loud as the output from a keyboard or active preamp The PRO DI is a passive direct box and is designed to output a microphone level This allows the PRO DI to be used along side other microphones in a snake system and connect to the microphone input on a mixing console Will phantom power hurt my PRO DI or devices connected to it No Phantom power will simply be ignored by the PRO DI as well as blocked from reaching any device connected to it Do I really need a DI Can I not simply connect my instruments directly into the mixer Of course you can Instruments can connect directly to a mixer using a hi Z unbalanced guitar cable up to 20 feet long The advantage of
7. ery attempt has been made to make the PRO DI plug amp play easy to use However it is still a good idea to read this manual thoroughly to ensure you take full advantage of all the features that are built in so that the results you get are the very best possible Should you have any questions on your new PRO DI please consult the Radial website FAQ section as this is where we publish questions and answers from users after a product has been released If you do not find the answer you are looking for please feel free to send us an email at info radialeng com and we will do our very best to get back to you promptly Now plug in the ol Martin turn it up way up and enjoy Radial Engineering Ltd 1638 Kebet Way Port Coquitlam BC V3C 5W9 tel 604 942 1001 fax 604 942 1010 email info radialeng com web www radialeng com Radial INTRODUCTION The Radial PRO DI is a passive direct box This means that unlike active direct boxes that either require a battery or power of some sort to make them work your PRO DI does not need any power at all It is plug amp play easy to use A direct box is primarily used to convert a high impedance instrument signals to a low impedance balanced mic level signal which can then be processed like a microphone and driven through long cables without introducing noise The PRO DI employs a high quality impedance matching transformer to do the conversion Typical applications for the PRO DI
8. vice Often the PRO DI s output will connect through a microphone snake system to a mixing console Once your cables are connected you can turn your system on and turn the volume up Start at a low volume to make sure everything is working properly If you encounter any buzz or hum try lifting the ground switch on the PRO DI If you hear any distortion check the input at your mixer first and then if your input controls appear normal try depressing the input PAD switch on the PRO DI This will reduce the input level by 15dB and eliminate distortion caused by ultra high output sources After depressing the PAD switch the mixer input controls may have to be readjusted Typical DI box setup Radial Engineering 3 PRO DI User Guide Radial RE AMPING WITH YOU RADIAL PRO DI The term re amping comes from taking a pre recorded guitar track and sending it back through a guitar amplifier to re amplify it and then re record it again This trick has been used since the 1950s with artists as diverse as Les Paul the Beatles and Steely Dan It s simple to do plug your electric guitar into the PRO DI and send the thru put to your guitar amplifier Connect the bal anced output on the PRO DI directly to your recording system and record a clean guitar track this way Put a mic in front of your guitar amp as usual and record it to another track at the same time You will now have both the amplified sound and the direct clean sound recorded on separat
9. z input 600 ohms 60dB mic level pin 2 hot 15dB Radial Engineering 5 PRO DI User Guide LIMITED THREE YEAR TRANSFERABLE WARRANTY RADIAL ENGINEERING Ltd Radial warrants this product to be free from defects in material and workmanship and will remedy any such defects free of charge according to the terms of this warranty Radial will repair or replace at its option any defective component s of this product excluding batteries finish and wear and tear on components under normal use for a period of three 3 years from the original date of purchase In the event that a particular product is no longer available Radial reserves the right to replace the product with a similar product of equal or greater value To make a request or claim under this limited warranty the product must be returned prepaid in the original shipping container or equivalent to Radial or to an authorized Radial repair center and you must assume the risk of loss or damage A copy of the original invoice showing date of purchase and the dealer name must accompany any request for work to be performed under this limited warranty This limited warranty shall not apply if the product has been damaged due to abuse misuse misapplication accident or as a result of service or modification by any other than an authorized Radial repair center THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DESCRIBED ABOVE NO WARRANTIES WHETHER EXPRESSED OR
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