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Post subject: Passport 500+ questions
Posted: Mon Jun 22, 2015 1:07 pm
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Hobbyist
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Location: Central Ohio
I heard while watching a Youtube video . . . "You can connect to any 500 to 1000wt
powered sub via a 1/4" cable."

1). It has to be 500 to 1000wts? Please explain. I have a Mackie DLM12s 2000wt powered sub.

2). The sub has XLR connects. Can I use a cable with 1/4" on one end/XLR on the other?

3). Can I run into powered cabs from the monitor out?

TIA! Wayne

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Post subject: Re: Passport 500+ questions
Posted: Mon Jun 29, 2015 6:02 am
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1. The output from the "Sub out" port on the Passport 500 is a line level signal. It requires a powered (aka "active") subwoofer (or a power amplifier, which then goes to a passive subwoofer). There is no specific power requirement for the active subwoofer. Your subwoofer is 2,000 watts PEAK power. The number that counts is RMS. Your subwoofer is 1,000 watts RMS. That's more power than you need to balance against a Passport 500, but you can turn the sub down and be okay.
2. Your sub probably has female XLR ports on it. You need 1/4" to male XLR. That's an uncommon cable. You may have to order it somewhere, but it should work fine. Keep the cable short (probably best 20' or shorter), since the sub port on the Passport is unbalanced.
3. You can run powered cabinets from the Stereo Out, but be sure to deal with splitting out the stereo signals from the 1/8" TRS output port either to two mono inputs, or plug it into a unit that expects a stereo signal. The three wires in TRS can be used two different ways in sound systems and they are not especially compatible. One way is stereo (two signal wires and a ground). The other is "balanced" (one signal wire, one ground wire, and one shield mesh that protects the other wires from external magnetic noise). You don't want to plug a stereo output into a balanced mono input.
I hope this helps.


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Post subject: Re: Passport 500+ questions
Posted: Mon Jun 29, 2015 8:35 am
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Location: Central Ohio
Thanks for the detailed reply!

RE: #3 . . . What I want to be able to do, for larger gigs, is to also
use my Mackie DLM12 powered cabs, along with the Passport.

Ultimately I'd like to run 2 additional cabs. We're a backing trax band.
My tracks are stereo MP3s. Bass guitar and drums are on the left track.
The other instruments are on the right track.

So if I ran out of the 1/8" stereo out, into one DLM, and daisy chain into
another one, that's what you're saying?

Or is there a better way to run the DLMs out of the Passport? Seems like
beefing up a 1/8" to an XLR is a big step.

We don't use monitors.

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Post subject: Re: Passport 500+ questions
Posted: Wed Jul 01, 2015 7:50 am
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Aspiring Musician
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If you play stereo tracks through the Passport, you already have bass guitar and drums coming out of one speaker and everything else coming out of the other, so you apparently don't mind that.

What I recommend is that you get an adapter that goes from 1/8" TRS stereo to two male XLR mono and run one of those to each of your DLM12 powered cabs. This is a common adapter for plugging the headphone jack of an iPod into a sound system that can handle XLR at line level. It will give you the same bass & drums coming out of one cab and everything else coming out of the other.

If you wanted everything to be mono, mixed together, you probably should rework your MP3 files accordingly, or instead of using the built-in USB port with a FLASH drive that preserves the unusual stereo split your MP3 files have, get a second 1/8" TRS stereo to two mono male XLR cable and play your MP3 files through an iPod or similar device, running them into two mono input tracks on the Passport, using the mixer to balance between the two tracks. This will give all the speakers one common mono mix, which is probably what you want.


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