cable to connect ipod or mac to 1 PA

[bmast160]

i want to run an ipod or mac into one jbl prx612m but im not sure what kind of cable to do this with mini trs to 1/4 trs or mini trs to xlr???

 

this is the manual for the pa which shows the connections on the back:

 

http://www.jblpro.com/catalog/suppor...1672&doctype=3

[jwlussow]

Mini TRS to XLR.

[Coaster]

http://www.ccisolutions.com/StoreFront/product/rapco-ltiblox

[scarecrowbob]

 

http://www.ccisolutions.com/StoreFront/product/rapco-ltiblox

 

 

That's neat...

 

I was gonna suggest a stereo DI... does that box sum the L and R?

[Coaster]

it does. i have installed around 4 of them in the last couple years, they work very well for mono pa.

[RoadRanger]

Mono music to set up by = blech . Use a male-to-male 1/8" stereo cable with this:

http://audiopile.net/products/DI_Boxes/DBRC-2A/DBRC-2A_cutsheet.shtml

or a 1/8" stereo male to dual RCA male cable with this:

http://www.artproaudio.com/products.asp?type=90&cat=13&id=106

 

Of course, then you need a second JBL PRX612M .

[bmast160]

but i can just use mini trs to male xlr, right? the input on the jbl is a balanced female xlr and there is a gain knob and an "input sensitivity selector to permit the connection of many different sources, with or without the use of a mixer or external microphone preamplifier".

[RoadRanger]

but i can just use mini trs to male xlr, right?

If you are talking about a cheap cable - probably not. It will either give you only one channel or short the two channels together which has a high likelihood of distorting .

[Miko Man]

 

but i can just use mini trs to male xlr, right? the input on the jbl is a balanced female xlr and there is a gain knob and an "input sensitivity selector to permit the connection of many different sources, with or without the use of a mixer or external microphone preamplifier".

 

 

The mini TRS is getting a stereo unbalanced signal. You need something to sum the left and right channels AND convert to a balanced signal. Mark C.

[Rezrover]

Mono music to set up by = blech . Use a male-to-male 1/8" stereo cable with this: http://audiopile.net/products/DI_Boxes/DBRC-2A/DBRC-2A_cutsheet.shtml or a 1/8" stereo male to dual RCA male cable with this: http://www.artproaudio.com/products.asp?type=90&cat=13&id=106 Of course, then you need a second JBL PRX612M .

 

This is what I should've gotten in the first place.

[agedhorse]

Mini TRS to XLR.

 

Won't work.

 

This will feed a differential input with a left right signal giving you the DIFFERENCE between left and right. Bad idea. Also not phantom power protected for the time that somebody plugs it into a console thinking that's a good idea before realizing phantom power is on.

 

Either a summing interface like many of the AV DI's (you will need to use the mic input because most of them step the level down) or a custom cable with proper summing resistors. I sell a ton of them to pro users, or those who have blown up a few expensive personal electronics devices

[bmast160]

thanks!

 

what if i used a mixer like this?

http://www.amazon.com/Mackie-Onyx-1220-Premium-Small-Format/dp/B0002NPJ42

 

connect ipod to mixer with a mini trs to double rca cable

 

connect the mixer to jbl with a 1/4 trs to 1/4 trs connector

 

will this blend the two channels and convert to balanced signal?

 

if i did this i'd also be able to equalize

[RoadRanger]

what if i used a mixer like this? http://www.amazon.com/Mackie-Onyx-1220-Premium-Small-Format/dp/B0002NPJ42

Blech . get this:

http://www.musiciansfriend.com/pro-audio/soundcraft-notepad-124fx-mixer-with-effects/430567000000000

[Rezrover]

 

thanks! what if i used a mixer like this? http://www.amazon.com/Mackie-Onyx-1220-Premium-Small-Format/dp/B0002NPJ42 connect ipod to mixer with a mini trs to double rca cable connect the mixer to jbl with a 1/4 trs to 1/4 trs connector will this blend the two channels and convert to balanced signal? if i did this i'd also be able to equalize

 

 

Is this all stuff you have on hand? I'd just spent the $50 and do it right.

[Rezrover]

 

what if i used a mixer like this? http://www.amazon.com/Mackie-Onyx-1220-Premium-Small-Format/dp/B0002NPJ42

 

 

Just noticed the built-in talk-back mic in the board.

[bmast160]

have everything but the mixer...but i was planning on getting one at some point anyway

[Miko Man]

Using a mixer will work if you put one source channel (L) into one mixer channel strip and the othe source channel ® into a different channel strip. The two mixer channels will be summed into what is now a mono signal for the mixer output. You can't plug the source inputs directly into a single channel strip ( one of the stereo channel strips with 2 RCA jacks) because that will not sum the l-r channels into mono. Mark C.

[bmast160]

ok. thank you!

[Miko Man]

If you are using an iPod or iPad as the source, you can get a 30 pin connector to dual RCA plug cord. That will give you a line level signal that is not affected by the earphone volume setting. Mark C.

[fdew]

As Mr Horse said, there are advantages to doing it with a proper summing cable and a DI box.

 

You get a true summed signal, not just a short between the two stereo outputs or the difference between the two outputs.

 

You protect the source from Phantom power.

 

You prevent ground issues (handy it the source is a laptop or other source with a line lump grounded power supply).

 

The circuit is just 3 resistors and you can find it here. http://www.rane.com/note109.html

 

It is the second one down. You can build it into the 1/4 in plug on a 1/8 TRS to 1/4 TS cord, To make it a little easier, you can buy the fat switchcraft plug such as the 187 series.

Then use your cord with any DI box. or plug into the line in of a mixer.

 

There are other safe good ways including a number of DI boxes that offer summing and some that offer it at a 1/8 in. stereo jack.

 

Here are two

http://whirlwindusa.com/catalog/black-boxes-effects-and-dis/direct-boxes/poddi

http://whirlwindusa.com/catalog/black-boxes-effects-and-dis/transformers-isolation-devices/isopod

 

I do not know how they sound

[agedhorse]

In the Rane note, the unbalanced summing circuit should have ring resistors so that when it is used for balanced sources it will work properly. Their explaination is not correct. (Or just use tip-sleeve connectors and don't use it on balanced signals).

 

Also, the shunt resistor is not necessary in most applications, this one included.

[DaBender]

Using a mixer will work if you put one source channel (L) into one mixer channel strip and the othe source channel ® into a different channel strip. The two mixer channels will be summed into what is now a mono signal for the mixer output. You can't plug the source inputs directly into a single channel strip ( one of the stereo channel strips with 2 RCA jacks) because that will not sum the l-r channels into mono. Mark C.

 

Also, if you have a cord that terminates in 2 RCA plugs and you have a couple of stereo channels on your mixer and you connect as above AND you are using your mixer in mono, be sure to plug both channels of the iPod into whichever channel you are taking out of the mixer. IOW, if you are using "left" as your main feed, plug the left and right channels from the iPod into two "left" RCA jacks on your stereo channels on the mixer.

[MarkGifford-1]

I built the "stereo-to-mono summing box" that's shown here:

 

http://www.rane.com/note109.html

 

It's simple enough to build into a speaker-sized 1/4" male plug.

 

Took about 15 minutes to make, works like a champ and cost about $5.

 

MG

[drumstix]

Good post. I run into this issue allot. Summing into one channel is the answer to my Mixwizards lack of a stereo channel and eating a extra channel panning hard L&R.

[RoadRanger]

Good post. I run into this issue allot. Summing into one channel is the answer to my Mixwizards lack of a stereo channel and eating a extra channel panning hard L&R.

Yours is an older one without the ST2 input most of us use for recorded music?