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On the Turning Away

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Paul G. OBrien:

--- Quote from: Dennis Wiggins on November 12, 2020, 06:57:14 am ---When I use this effect with powered subs (specifically, ZXA1 and ELX200-18SP ) their internal 'workings' filter out most of what try to add in.  This is not unlike 'getting the tone" from a guitar amp.  My old school EV X180B dual 18s and even the sB122s (both high passed at 45hz with my own EQ/Limiting)
--- End quote ---

DSP isn't the problem here, it's what is implemented with the DSP that is. Those powered speakers will have a very steep high pass filter whereas the roll-your-own setup you had with the old EV passives most likely had a very shallow filter... so more low frequency energy got though with the Kosmos boost. The solution is better powered subs.. something with real output down into the 30hz range.

Dennis Wiggins:

--- Quote from: Paul G. OBrien on November 13, 2020, 03:41:39 pm ---DSP isn't the problem here, it's what is implemented with the DSP that is. Those powered speakers will have a very steep high pass filter whereas the roll-your-own setup you had with the old EV passives most likely had a very shallow filter... so more low frequency energy got though with the Kosmos boost. The solution is better powered subs.. something with real output down into the 30hz range.

--- End quote ---

"Do try this at home" was always my motto.   "Have knob, will turn" is another.

X180Bs were high-passed BW24 @40hz EQ Freq 50 BW 0.4 +4.5

sB112s BW48 @48hz EQ  Freq 57 BW 0.4 +4.5. 

Output Limiters on both were +9 2.5:1 10/100ms. 

I created these settings by trial and ear-roar and could push the "haystack" hard to good effect. 

The new system is very easy and satisfying to run, but my ego says "I want more control!"

 I'll get over this :)

Paul G. OBrien:

--- Quote from: Dennis Wiggins on November 13, 2020, 03:58:45 pm ---X180Bs were high-passed BW24 @40hz EQ Freq 50 BW 0.4 +4.5
--- End quote ---

Well so much for that theory so maybe it was just a case of more subbage, how many of those dual 18s did you use and how were they powered, and how many powered subs do you use now? You would probably need 4 of those ELX subs to equal one X180B loaded dual 18s in SPL.

Chris Grimshaw:

--- Quote from: MikeHarris on November 13, 2020, 01:14:45 am ---
As good as Powersoft or Lab Gruppen sounds on paper...a bridge mono GTA will have a better*bass sound in any dance club.
Crown MA3600/5000 a joke on low end.
We would also choose amplifiers like Bryston or UREI for the horns and tweets as they were less harsh..


--- End quote ---

A brief search online didn't turn up anything about GTA amplifiers.

Which Powersoft or Lab amps did you try?

I suspect there are a lot of people around that would also disagree with your assessment of the Crown MA5000VZ. I have a good-condition MA5002VZ here and find it sounds remarkably HiFi when running full-range, and has plenty of power on tap. I also find that those amps often suffer from sub-par repair work (ie, replacing only some of the output transistors, rather than a full matched set), which would directly impact performance.

Chris

Milt Hathaway:

--- Quote from: Chris Grimshaw on November 14, 2020, 09:21:30 am ---A brief search online didn't turn up anything about GTA amplifiers.

--- End quote ---

I'll bet he's talking about BGW's 78 pound monster: https://www.dropbox.com/s/a3dhiq0l92fedy0/BGW-GTA.pdf?dl=0

I still have a few keeping my warehouse foundation from floating off into space.

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