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Valued Contributor
RoadRanger
Posts: 9,726
Registered: ‎02-12-2009

Re: Considering amp duty reassignment, thoughts?


oldschooler wrote:

Please do not mention the good old days. When I started bands weren't even asking for monitors, only the singers got them or everyone shared one mix. You were using 150 watts amps because that was all we had at the time. Weren't you drooling for bigger amps? I know I was.

Our board had only one monitor mix. No, never wanted more than the 150 watts into three monitors.

Give your monitor to a drummer who hits hard, I bet your 75 or 250 watts isn't going to work for him.


Well yah - drummers who can't play at a volume appropriate for the venue suck and ruin the gig. How does louder monitors fix that 

"We Have Met the Enemy and He is Us" - Walt Kelly

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Valued Contributor
RoadRanger
Posts: 9,726
Registered: ‎02-12-2009

Re: Considering amp duty reassignment, thoughts?


oldschooler wrote:

Having headroom also means you don't have to run your gear as hard. 


So, you're saying a given cab is run less hard if you supply more power to it 

"We Have Met the Enemy and He is Us" - Walt Kelly

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Super Contributor
oldschooler
Posts: 613
Registered: ‎05-14-2004

Re: Considering amp duty reassignment, thoughts?


Roadrunner wrote:

oldschooler wrote:

Having headroom also means you don't have to run your gear as hard. 


So, you're saying a given cab is run less hard if you supply more power to it 


No, I meant the other way around, I prefer not to run my amps hard at all. I rather limit an amp to a lower RMS, then run a small amp near clipping or clipped all night long. 

Powering speakers depends on the SPL you want to achieve. If you're not clipping you amps at all, and the SPL works for you. But for my systems, I prefer to have higher power amps. There usually isn't a huge price difference moving up to the higher power model, an example is the QSC GX5 vs a GX7. For $100, you almost get double the power, but the ROI is when it's time to sell, the GX5 might be easier sell. Five hundred watts can power most speakers and subs where as a GX3 might be stuck at monitor world only. 

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Valued Contributor
RoadRanger
Posts: 9,726
Registered: ‎02-12-2009

Re: Considering amp duty reassignment, thoughts?

Unless I'm running minimum impedance on an amp I don't worry at all with running it up to the rails. If I was pounding the crap out of a pair of double 18's on both channels (2 ohm loads) I'd want to get another amp so I could drop that to one per channel (4 ohm loads). In this case his proposed "improvement" is to go from a moderately loaded sub amp to a pair of heavily loaded bridged amps. Which do you think would be more reliable?

"We Have Met the Enemy and He is Us" - Walt Kelly

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Super Contributor
oldschooler
Posts: 613
Registered: ‎05-14-2004

Re: Considering amp duty reassignment, thoughts?

On this case, moving to the bridge PLX 1602 only moves him into the RMS rating of his subwoofers. They are rated at 3200 watts program at 4 ohms. So the PLX 1602 powers each sub fine.
Moving the PLX 2404 up isn't a big issue either. It will power his speakers fine.
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Super Contributor
abzurd
Posts: 6,964
Registered: ‎12-17-2001

Re: Considering amp duty reassignment, thoughts?


oldschooler wrote:
On this case, moving to the bridge PLX 1602 only moves him into the RMS rating of his subwoofers. They are rated at 3200 watts program at 4 ohms. So the PLX 1602 powers each sub fine.
Moving the PLX 2404 up isn't a big issue either. It will power his speakers fine.

Right.... which is what I said 2 pages ago. Then I bailed out of the discussion when the nonsense started :smileywink:

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Valued Contributor
agedhorse
Posts: 42,868
Registered: ‎12-25-2001

Re: Considering amp duty reassignment, thoughts?

On today's modern power amps, the limiters prevent the amps from hitting the rails and clipping (for practical purposes) which allows for more latitude.
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Super Contributor
oldschooler
Posts: 613
Registered: ‎05-14-2004

Re: Considering amp duty reassignment, thoughts?


abzurd wrote:

oldschooler wrote:
On this case, moving to the bridge PLX 1602 only moves him into the RMS rating of his subwoofers. They are rated at 3200 watts program at 4 ohms. So the PLX 1602 powers each sub fine.
Moving the PLX 2404 up isn't a big issue either. It will power his speakers fine.

Right.... which is what I said 2 pages ago. Then I bailed out of the discussion when the nonsense started :smileywink:


Well, I don't know what to say anymore. So I'll just keep my mouth shut.

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