FDP Forum / Why use a direct box?/ 21 messages in thread.

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shunka



Willoughby, OH , USA

I'm arrogant and a moron
Oct 11th, 2017 10:16 AM        

Assuming it's a low volume acoustic gig, can I run the bass through the PA without a direct box? I do it with my acoustic guitar all the time.<br /> two vocals ac guit. and bass would all be straight into the PA.



Juice Nichols

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Panama City, FL

I'm just a dude, playing a dude...
Oct 11th, 2017 10:39 AM        

Sure, you can run it straight into the board and it will work. If you have a direct box, I'd use it though. Same with your acoustic guitar, if you have one use it, unless your PA is like mine and has a couple Hi Z inputs in which case you don't need one.<br /> <br />



wborys

OldFartBassPlayerWalt

Robbinsville, NJ

what do you mean the bass is too loud?
Oct 11th, 2017 10:54 AM        

Question: should the extreme low frequencies be rolled off slightly to protect the speakers?



Juice Nichols

Contributing Member
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Panama City, FL

I'm just a dude, playing a dude...
Oct 11th, 2017 11:22 AM        

Walt, you shouldn't need to unless it sounds like crap. The speakers themselves should be capable of handling the frequencies they're designed to handle. <br /> <br /> Unless your board is equipped with a parametric EQ or you can insert a GEQ on the channel, you'll more than likely be cutting way more of the bass frequencies than you want to anyway. The "bass knob" on most small PA's cut a pretty wide swath (or Q) and you'll more than likely be cutting freq's that you still want.



Peegoo

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Oct 11th, 2017 12:03 PM        

A direct box is a transformer that converts high-impedance signals like guitar pickups to a low-impedance signal that a typical board likes to see. <br /> <br /> Sound quality is a whole lot better and induced noise in the signal is rejected when a direct box is in line. This is critical when recording. <br /> <br /> For playing live, it's a wash most of the time unless you have really noisy/dirty power, etc.



gdw3



LA-la-land, CA

Insert clever comment here
Oct 11th, 2017 02:09 PM        

Also, a good reason to use a DI is if you have a long cable run. You're going to get more signal loss (as well as noise, as mentioned above) from a long guitar cable going to the board compared to an equally long XLR cable coming from a DI.



rockstar_not



USA

Thank God for guitars!
Oct 15th, 2017 08:07 PM        

Peegoo and gdw3âs responses are primarily the same and the main reason to use a good DI.



Roly

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Whitehorse Canada

I don't get out much
Oct 16th, 2017 02:59 PM        

You can't lift the ground on an unbalanced source.



shunka



Willoughby, OH , USA

I'm arrogant and a moron
Oct 18th, 2017 11:08 AM        

WHAT IF I'm SUB MIXING all the guitars through a small mixer and an XLR into the board?



Juice Nichols

Contributing Member
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Panama City, FL

I'm just a dude, playing a dude...
Oct 18th, 2017 11:58 AM        

The point of the DI is to get a balanced signal into the mixer. What you do with the signal once it's in the mixer doesn't matter with regards to the DI.



Peegoo

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Oct 18th, 2017 02:10 PM        

Right. The DI is necessary prior to the first gain stage in an unbalanced mic or instrument's signal chain. <br /> <br /> The DI cancels induced noise before the noise can be amplified (along with desired signal) by a gain stage.



hushnel

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North Florida

A Friend of Bill W.
Oct 19th, 2017 03:34 PM        

I have a SABDDI, mostly it's for back up, but occasionally I use it to tweek my sound, if I can't get the amp or bass to do what I want it to. Or direct recording.



Tony Wright

Contributing Member
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Stillwater, OK

I never met a calorie I didn't like.
Oct 19th, 2017 09:21 PM        

CAN you? Of course.<br /> <br /> SHOULD you?<br /> <br /> Depends on how important the gig.<br /> <br /> In the end, it is your call. (Edit to add:) I would at least carry a DI in case I get to the gig and the wall circuits are junk or the motor is shot on the ice maker or blender or some other electric device is throwing junk in the wall current. Just common sense from my perspective.



Roly

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Whitehorse Canada

I don't get out much
Oct 20th, 2017 03:52 AM        

I think Tony just said the long version of<br /> "you can't lift the ground on an unbalanced signal"<br /> <br /> Long coaxial signals can add noise that is impossible to remove.<br /> It's unlikely that short (under 20 feet) coaxial cable will introduce noise into the system unless there are shielding issues with the source(in which case, a DI won't solve the problem) or the cable.<br /> <br /> Always use a DI...it's a no brainer.<br /> <br />



acplayer



MA

Earn while you learn
Oct 20th, 2017 06:25 AM        

When in doubt I use a DI.<br /> I have had noise added to the signal when using a (built-in)DI out from a bass amp. This has happened more times than not.<br /> <br /> I have never experienced noise added to the signal chain by using a passive DI....<br /> <br /> DI w/ ground lift switch = flexibility<br />



spacedawg

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Delco, PA

"I'll take a simple C to G
Oct 21st, 2017 11:15 AM        

Acoustic guitars just sound better with DI box IMHO. I assume a bass would benefit from all the circuit goodies as well.



Mick Reid

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Australia

American-made in Oz!!
Oct 21st, 2017 05:36 PM        

I'm pretty late to the party here (as usual) and I'll add that I am far from a "pro sound guy" like some others above.<br /> <br /> But in any situation where a high impedance source (guitar, bass) is going into a low impedance input (mixer, DAW) it is my first and natural instinct to use a DI.<br /> <br /> For 40 bucks each it's worth having a couple of Behringer DI-100's in your kit.<br /> Say what you want about Behringer, but I've seen plenty of their DI's in pro sound peoples gear boxes and are what I have had in mine for years. They use a 9v battery or phantom power. Cheap, simple, good.<br />



Roly

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Whitehorse Canada

I don't get out much
Oct 22nd, 2017 05:31 AM        

I have no issues with the noise level or tone of Behringer DIs.<br /> I do have an issue with the proximity of the pad switches to the 1/4" input.<br /> <br /> We were filming a live show and the artist comes out and plugs in....Roly takes the mute off of the acoustic guitar rail and it goes nuts.<br /> Turns out that the performer inadvertently disengaged one of the 20 dB pad switches while plugging in his guitar cable.<br /> After that, I started taping bottle caps over the pad switches.<br /> My current go to DIs are BSS AR-116.<br /> Not only do they have the usual pad switches, they have a polarity switch and a three position low pass filter....very handy for zingy acoustics and violins. <br />



gmanNJ

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Joisey

Oct 22nd, 2017 06:30 PM        

Behringer makes good stuff IMO but its delicate. The price point is good tho....good enough to carry a spare if/when the main unit takes a dump.<br /> <br /> I have a couple passive Whirlwind EDB-1<br /> solid extruded metal construction but its passive.<br /> <br /> My go to is this one.<br /> I use phantom power and beat the crap outta it<br /> Been using it for years now-it owes me nothing. BUT I do keep the passive ones in the gig bag just in case



Juice Nichols

Contributing Member
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Panama City, FL

I'm just a dude, playing a dude...
Oct 23rd, 2017 06:59 AM        

The only Behringer product I've had go bad (and I have numerous products) was an active DI. What I thought was a bad cable from a keyboard actually turned out to be the input jack on the DI. Other than that I don't have a negative thing to say about their products.



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