Limiting question

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ChrisMcCune
Posts: 64
Joined: Sun Nov 03, 2013 7:37 pm
Location: San Diego, CA

Re: Limiting question

#31 Post by ChrisMcCune »

Plugged into the wall of my house is reading 120...

Im unsure about Ohms. How do I know Im measuring 4Ohms as opposed to 8?

Bruce Weldy
Posts: 8539
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Limiting question

#32 Post by Bruce Weldy »

ChrisMcCune wrote:Yes the clip lights are coming on the amp forsure. Just tried multiple channels and multiple cords nothing seems to give me a reading other than 90v :wall:
I think it's time to try another meter. That amp is NOT too much......but, something is definitely wrong.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 8539
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Limiting question

#33 Post by Bruce Weldy »

ChrisMcCune wrote:Plugged into the wall of my house is reading 120...

Im unsure about Ohms. How do I know Im measuring 4Ohms as opposed to 8?

You are measuring voltage, so the impedance doesn't matter.

There really is no such thing as wattage until voltage meets resistance (ohms). So, if the amp puts out 60 volts - that will be 450 watts at 8ohms and 900 watts at 4 ohms. It will take a while to wrap your head around that, but when you do - the clouds will open and the sun will shine through, grasshopper.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

NukePooch
Posts: 371
Joined: Mon Jun 30, 2014 8:07 pm
Location: Berea, Kentucky

Re: Limiting question

#34 Post by NukePooch »

Have you tried a different test tone? It's not a square wave or something is it?

Try turning down at the board until the amp output is at 60-65v... where are the board output meters registering? Are the amp clip lights still on?
Built:
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF

Bruce Weldy
Posts: 8539
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Limiting question

#35 Post by Bruce Weldy »

NukePooch wrote:Have you tried a different test tone? It's not a square wave or something is it?
this is certainly worth exploring. I dont' like the whole youtube idea of a test tone.

Download Audacity to your PC and use the tone generator there. I did that and then downloaded the tones to my iPad and phone - so I can run test tones anytime.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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