Question 1

I have a gibson ed335 and when i run  it into my fender deluxe amp i always hear a hum. is it customary to run this between a guitar and an amp all th

Accepted Answer

Did you mean es335? That Gibson has humbucking pickups so shouldn’t be very hummy.
It’s customary to run a bass though a DI that way, but not guitars unless you are using pedals only to create your tone. If you rely on your amp and speaker for your sound it would be better for the sound person to put a microphone in front of your speaker. Try comparing your amp to another at the same location to see if the hum is as loud. Fluorescent and neon lights an motors can radiate hum which can be picked up by a bad cable or a problem inside your amp or guitar. 
The main purpose of a direct box is to convert a single-ended high impedance signal to balanced line low impedance that can be sent over long distances, cancelling hum that is picked up in the cable going to the mixer. If there’s hum before the DI there will be hum after it.

Question 2

I got a general question. If I am getting a direct box... does it matter if the cables are balanced or unbalanced?

Accepted Answer

Most DI boxes convert an unbalanced high impedance signal to a low impedance balanced signal. So, you can use unbalanced in and balanced out. A balanced cable has more noise rejection and is better for longer cable runs. The Radial ProD2 takes 2 unbalanced 1/4 inch TS connectors in and converts then to 2 XLR balanced outputs.

Question 3

Looking to pass a stereo out from MacBook pro, through a volume pedal, to the di, and out stereo to the board. I play live through logic + mainstage.

Accepted Answer

Hello Brandyn,If you are using an audio interface with the MacBook Pro, the ProD2 would be perfect. If you are using the built-in sound card of the MacBook Pro, you will want something like the Radial StageBug SB-5 Sidewinder Laptop DI (as it is outfitted with a stereo 3.5mm connector, so you don't need any adapter). The Pro D2 will work with a laptop's built-in card, but will require (1/4" to 1/8") adapters - which is not recommended (minimal "patch points" is always the best route). Let us know if we can help with anything else. We at Front End Audio are happy to do what we can.Thank you!

Question 4

I require 5 Passive stereo DI boxes - From 8 bucks to 300 bucks?  Is there a reasonable quality and reasonable price you would reccomend for me ie a stereo Yamaha S90 Keyboard?  I have one ProD2

Accepted Answer

I would actually recommend the Radial Pro D2. It's the most reliable DI box we sell. If your using it for the Yamaha S90,  you really don't want to buy anything cheaper. Thanks.

Item Weight	544 g
Product Dimensions	16.26 x 10.92 x 7.87 cm; 544.31 g
Item model number	R8001102
Color Name	Green

Radial Engineering ProD2 Passive Channel Direct Box

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