Help with DI/buzzing in FOH
After searching around for a bit I thought it would be best to put up a new thread for some help. I am having an issue with my Eden WT800 direct out giving both low volume and a lot of buzzing. For background information this is an older model, 1994 I believe, and was serviced this past summer for some cold solder points in the power amps. The amp is rock solid through my cabinets but I just have terrible tone going to the FOH. I just ordered a JDI MK3 to use for an upcoming show and my plan is to run the parallel speaker output to the DI so I have my amp eq and such going to the FOH.
I guess my questions are:
I will have both power amplifiers under load but will the DI effect the ohm rating coming out of the power amps?
Has anyone experienced this type of issue with their amps DI? If so, is it worth getting fixed or just getting a different box?
And lastly, does the JDI have wattage restrictions for using the speaker output? The eden pushes 400 watts at 4 ohms on both sides.
Thanks for any help you can give!
I'm not sure connecting your parallel speaker output to the DI is a good idea. Seems to me that's a different kind of signal, although other TBers could be more specific. Maybe the recording output, 1/4", would be a better choice?
In my experience, it's a rare onboard DI that doesn't have major noise issues. I gave up years ago and bought a Countryman DI; all the soundmen love it, and many have a half dozen of their own.
The JDI is wonderful, and I would STRONG recommend the OP just taking his bass direct through that, and then running the pass through to his amp. Wonderful warm, accurate tone.
The JDI does allow for 'power amp input' (to the OP READ THE MANUAL REGARDING THE RIGHT SETTINGS FOR THAT). I've never done it, and unless you are really overdriving a power tube section or whatever, I would see absolutely ZERO need to do this with the relatively neutral Eden profile.
It has been a while (well, decades!) since I gigged an Eden regularly. If I remember correctly, there should be a ground lift button on that DI. So, that is the first thing to try. If that doesn't work, plug your bass into the JDI, let the front of house guy do his job with EQ, and have a great gig:D
Edit: running a parallel out from a speaker to the 'power amp input setting' of the JDI will not impact impedance... no issue there as far as I know.
All of the buzzing issues that I have had, were caused by one, or more, of three things. Ground loop. Power cables crossing signal cables. Fluorescent lights. Most often, it has been cables.
Follow-up to the OP (it has been a while since I owned the JDI also). There is a 'speaker' button that inserts a -30db pad in the input signal chain for use with a parallel output from a speaker (i.e., direct power amp feed). However, they have 'speaker emulation circuitry' included in that pad, which usually means cutting top end to emulate a more classic one way sealed box. This is probably NOT what you want, and again, this is typically used with something like a classic SVT rig, where you are interested in capturing the overdrive of the power tubes, and also somewhat emulation the classic sealed multi 10 cab with tweeter.
So, again, assuming a ground lift does not fix your issue, try just running your bass into the JDI, then JDI to amp using the 'pass through' 1/4" output. I believe you and your sound person will be even more happy with that than the post EQ feed from your WT800, even when working correctly:)
Thanks for the quick responses! I am honestly leaning towards just running the bass direct to the JDI for the FOH. My only concern is at times sound guys are hit or miss around this area... let's hope for a hit on Friday! I know the issue with the amp direct out is internal after trouble shooting at practice last night. Looks like I will be rolling with my own DI from now on and maybe beg them to mic the cab before giving up and using the DI :)
I usually run my GL2500 active so it sounds like the JDI is the right fit... maybe I can leave my back up head at home from now on also.
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