Two sets of Speaks, One amp

[Mitch Noble]

Hi folks, I'm new to the forum and have a newbe question.

I have a pair of L100 century's on a Phase Linear 400 amp. An old friend gave me a pair of L46 (with bad surrounds that I replaced).

My question is this: Can I hook up both sets to my phase Linear? If I put them in series and get 16 ohm load or would parallel be the way to go?

I just want to see what they would sound like together, I don't think I will leave both sets hooked up to one amp.

Thanks in advance for any input.

[Zilch]

Parallel will work. It'll be a 4-Ohm load.

Be aware you'll be making a sonic mess.

You can't run multiple systems in the same room without significant phase cancellations from several drivers playing the same program material concurrently.

The cancellations will vary depending upon your location with respect to the drivers.

We usta play mono through stereo pairs.

ACK!!

[Mitch Noble]

Wow! You're right, that sounds like wired poop.

I think I'll find another home for the little L46's (maybe the start of a bedroom system).

Thanks for the response.

["Duke" Spinner]

NOOOOOOO ...!

your Phase doesn't really want a 4 ohm load, belive me....

if you do this, you MUST have matched output devices, which very few do at this age ...

you will find out where the "Flame Linear" reputation came from .....

[Mitch Noble]

Too late, I already tried it.

The Phase Linear did fine, but the sound really sucked. I will find something else to drive the L46's by themselves.

So much for that experiment.

Thanks for the input.

[Mike Caldwell]

Hello
Running the second pair of L100's from a different amp will not really help
that much other making life easier on your Phase Linear amp. It could be worse if the second amp has a vastly different phase response than the Phase Linear, it would just add to the phase cancellation you are already getting from multiple speakers placed around the room. Here's something to try, take the second pair of speakers and place them upside down on top of the bottom pair or try turning the bottom pair upside down with the top pair right side up or upside down. Another idea would be to lay them stacked on their sides with different combinations of top to bottom. What this can help with is the acustic coupling of the two speakers and their components to form (one or close to it) source of sound by getting the drivers as close together as possiable and working as one. In a very broad sense this is what line arrays do with the hanging columns of separate speakers.
As for the Phase Linear at 4 ohms, keeping the amp cool with a small fan and not driving it too the extreme will keep the flames from coming out of the amp.

Mike Caldwell

[Zilch]

Wow! You're right, that sounds like wired poop.

Yup. Lots of neophytes think more speakers is better.

Not in the same listening space, it ain't....

["Duke" Spinner]

more speakers is better.

....

You bet it is ...!

i just bought some K-Horns for the hell of it ........

[louped garouv]

Parallel will work. It'll be a 4-Ohm load.

Be aware you'll be making a sonic mess.

...
ACK!!

How do the clubs run multiple stereo stacks? (of course neglecting the multiple amp, cabinet, large room stuff....)

[Zilch]

Art, Science, and "Acousticomputer," apparently.

There's the JBL sound reinforcement engineering manual on the JBL Pro website for a taste of what's involved, and application manuals for the various product lines.

We have some club specialists here on the forum who can tell us....

[It ain't easy, I betcha....]

[Mike Caldwell]

Hello
The layout that is pictured would suffer from the same problems as four speakers in the corners of a living room. But....it appears the system is completly horn loaded, the speaker stacks may be time delayed from the stage to the back of the room (from the design I think it predates any DSP's for that though) If it was a typical large dance club you have no real point source to time align to anyway. It would sound good for that enviroment, lots of low end, the directivey of a horn loaded system and the tweeter arrays would give a even balance of high frequencies. It may not be true Hi Fi in the sense of what you would want in you living room but would be perfect for a large dance club.
There is always a give and take when it comes to sound and setting up a system large or small. As for the "Acousticomputer" ?????

Mike Caldwell

[duaneage]

The Garage showcased the first Richard Long soundsystem. A truly amazing system, it has never been duplicated since. The Ministry of Sound in London has the same crossover network , horns and tweets.


Amplifier and equipment rack from the garage
Check out the JBL tweeter array and the JBL double scoops under the mains