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 Post subject: DI box questions
PostPosted: Tue Sep 08, 2009 7:05 pm 
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A couple of questions. Our band is relatively new to the live performances routine. We are getting new equipment and want to make sure our sound is the best it can be with what we have.

Currently we have 5 singers on mics, 3 acoustic guitars, and one electric. We also have a drummer and potentially a keyboard in the near future. We are looking for a mixer. However, while reading the instruction manual to a mixer we are considering, it states not to plug guitars directly into the mixer, to go thru a DI box. Something else I read said that DI boxes are required only if you are using non-preamp'ed signals/outputs. I'm not exactly sure when a DI box is needed. I understand that if we go thru an amp then out to the mixer (thru the XLR output) then we don't need DI boxes since the amp should balance the signal and lower the impedance. However, if just going from the guitar to the mixer, we do.

Is this true? Since the acoustics we play are all Taks, and they all have the preamps, do we still need DI boxes, or do the preamps in the Taks count?

Secondly, and bonus points if you answer this, is that we have a Nady RMX6. This will convert the 1/4 inch plug into an XLR plug. The manual and website from Nady and Musician's friend list this as a microphone mixer. It doesn't state that it functions as a DI box. However, I thought this was what a DI box was doing, converting the unbalanced 1/4 inch plug down to the balanced XLR plug. Can the conversion from 1/4 to XLR happen without balancing the signal and decreasing the impedance? Nady has a multiple DI/mixer in the RDI-8 that states it has 8 individual DI circuits.

Link to RMX-6: http://www.nady.com/rmx6.html.
Link to RDI-8: http://www.nady.com/rdi8.html

I don't know what I need. Anyone?

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Tom
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Tak TF340BGS
Adamas Custom U681T (cootie, SOLD)
Adamas Millenium
Ibanez 755SR
Ibanez SZ720FM


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 Post subject: Re: DI box questions
PostPosted: Tue Sep 08, 2009 7:12 pm 
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Joined: Sat Oct 13, 2007 2:24 am
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a di changes hi to low signal
so when using a mixing board you want to use the DI box to use the balanced low z input.
this gives you more control over the overall signal.
You can use the hi z and it will work but sometimes mixing low and hi z stuff will give you a nightmare on getting good levels and eq on the board.
yup you can use the nady mixer as a di

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 Post subject: Re: DI box questions
PostPosted: Tue Sep 08, 2009 7:34 pm 
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So, I DO need to use DI boxes on all the acoustics as well?

Are all XLR cables lowZ?

_________________
Tom
---------------------
Tak TF340BGS
Adamas Custom U681T (cootie, SOLD)
Adamas Millenium
Ibanez 755SR
Ibanez SZ720FM


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 Post subject: Re: DI box questions
PostPosted: Wed Sep 09, 2009 4:12 am 
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Joined: Sat Oct 13, 2007 2:24 am
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Location: NJ
yes all xlr are lo z
TRS (tip ring sleave) 1/4 are lo z

If I was running sound I would prefer it all to be lo z

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