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Line Array - Anyone have experience?

Posted: Mon Jul 09, 2018 11:53 am
by CeaSaR
Must be vacation time. :)

Anyone ever build a line array speaker where the main sets of drivers are singly (individually) amp'd?

I'm thinking of something similar, yet a bit more stylish and powerful than this: https://youtu.be/zPgm08xaDuA

"Thanks for your support."
(Who remembers THAT one?)
CeaSaR

Re: Line Array - Anyone have experience?

Posted: Mon Jul 09, 2018 1:28 pm
by Externet
Nice project.
Do you prefer individual amplification for each driver or a series-parallel array fed by a single amplifier ?
I would go with the single amplification; done it a few times that way. And no dedicated power supply to the speaker, less parts to give trouble.

The old Bose have a 3x3 array; how many transducers are in the plan ?

Re: Line Array - Anyone have experience?

Posted: Mon Jul 09, 2018 1:54 pm
by CeaSaR
Here's a little more of what semi-inspired me.

https://youtu.be/hy-ga4VolLA - a tiny little amp.
https://youtu.be/QTMqMbkL6bE - the eq circuit.
and the speaker in the OP.

While interesting, it seemed a bit ridiculous to use those little 1 watt amps, even though it gets 1 watt at 5 volts. So, I let it sit in my mind for a while.

Come forward about a year from those videos, and I see this one from a guy I have watched for a number of years, even on his old, long gone channel. What he is talking about, I had seen, but was a bit wary of. Here ya go: https://youtu.be/L08pd5l1aT0

These things actually work quite well. Okay, the amp does, but the supplied driver is crap. I have a pair wired up and slightly modified as a bench amp. With a 5 V supply and decent speakers, they're rather surprising. And the best thing is, you can get just about all you need in the same place. See? https://postimg.cc/image/5lr7vvccz/

So, with the low cost of these bits and how easy it is to modify them, the OP speaker came back to mind. I already have a 5 V preamp in mind and need to see what kind of EQ I'd need once I choose the drivers. We'll see.

Later Gators!
CeaSaR

Re: Line Array - Anyone have experience?

Posted: Tue Jul 10, 2018 3:11 pm
by haklesup
Interesting but I don't get why. Does it have a special sound quality? I can see if you drove each one separately with some kind of DSP you could probably do some interesting stuff but if all driven from the same source, in phase I wonder how it's sound differs from a typical enclosure with similar specs. Couldn't you do the same thing with an array of Bluetooth speakers (connected via the patch cable).

Re: Line Array - Anyone have experience?

Posted: Wed Jul 11, 2018 8:42 pm
by CeaSaR
You guys hit the nail straight on the head with your openings, "Nice project" and "Interesting."

It is... different. And I think that is what attracted me to it in the first place. I have always wanted to build a Line-Array speaker system, but at this point, there's not much room left for new projects, so a small version that would be self powered seems enticing, especially if they can be used on the bench. With the base components being basically plug and play, it's almost a no brainer.

As to why go the route of "more parts is more parts", well, where's the fun in just building a static box? Isn't the Electronics hobby supposed to be fun? And what's more fun than thinking "outside the box", especially when you can do so on a pittance of a budget? Currently, I have a prospective main driver and a prospective tweeter with associated 1st order crossover capacitor under consideration. I'm thinking of 5 of each per channel, so it would be about $23.50 for them plus shipping. Then I'd need 10 little amps and at least 6 of those power plugs, so $16 at the Dollar Tree. I have the parts for the preamps. I'd need wood, some miscellaneous wires and cords plus "time."

Once they would be built, I could then experiment with different input controls, either globally or individually. It opens up the door to further learning.

Ultimately I get something unique that I made. And THAT is extremely satisfying.

CeaSaR

Re: Line Array - Anyone have experience?

Posted: Thu Jul 12, 2018 9:40 am
by CeaSaR
Ha! After posting the above, this comes up on my YT feed: https://youtu.be/7RWkUoXOkR8
This guy is a mix between really knowing a lot about stuff and pushing the hype of audio-phoolery (almost the wire with gain crowd - yeah, I've busted on him when he gets his digital and analog mixed up), but here he is basically describing some of the thoughts I had in my mind with future experiments.
CeaSaR