moh.vze.com

My subs are now firing towards the rear. A basketball is keeping the box from sliding to the right and into the spare tire well area ~_~

Thanks for the nice informative video and data. I do have a question though, What were the strand counts for the CCA and OFC wire tested and what brand of wire were they?

Happy new year!

Nice video but I was sad when Santa's slay didn't move across the room

I bought this oscope years ago after reading all of the hype from this thread http://www.stevemeadedesigns.com/board/topic/39644-my-new-oscope-edit-its-here-pics-inside/ Is this oscope no good?

How do I know which AC Voltage reading is correct? There seems to be a ~3Volt difference between the Oscope and the DMM reading. I'll probably do another run on all of those different frequencies again tomorrow once someone confirms if it's ok to be somewhat clipping when doing this just for the sake of results -.- I will also use the DMM for DC Current readings. When I ran these tests, I think the lowest voltage I saw was 11.5V. Average was more around 12V though.

Well I originally used the oscope for setting the gain without the speaker wires hooked in and it had a clean curve. But when I hook up the speaker wires to the amp and play the tone at that exact same volume, I'm getting dirty power. That's where I'm a bit confused. People say to set the gains without the subs hooked up. Maybe someone can chime in on this. By the way, I don't bump my music with the voltage going below 12.5V.

I couldn't post all of the media links in the first post so here's Clamp run 5 http://youtu.be/liMOocFPjF8 Here is a video of the resistance reading for the subs nominal load: http://youtu.be/R_N1AOg5JC8 40 Hz @0dB test tone was used on all of the tests. I would like to note that my box is tuned to 30hz and I have the SSF set to 25Hz. Was I suppose to burp at different frequencies? (Ie: Burp at 30hz, 35hz, 40hz, 45hz, and 50hz)

Can you guys lock this thread please? I've created a new one here: http://www.stevemeadedesigns.com/board/topic/158663-dc5k-clamp-test-second-try-with-oscope-hooked-up/ I created a new thread because the results in this video were not accurate due to a faulty function on the clamp meter. A new thread will help keep everything clear and organized. Thanks!

Alright. I've recorded 5 different clamp tests. The second video uses the Pmax function on the clamp meter and the rest doesn't use that function for more accurate results. 40Hz test tone @ 0dB was used. Here is a video showing you guys the setup. What I've done differently this time was plugged my leads into the amplifier speaker terminals. The final ohm resistance actually read 1.1ohms (not 0.7 ohms like I had thought). http://youtu.be/9zBBChAqD3Y DC5k Clamp Test - Run 1: http://youtu.be/1pkedpaSrJU Clamp Meter Max AC Current: 61.4A Oscope Max AC Voltage: 66.8V DMM Max AC Voltage: 63.6V Results: Equation: AC Current * Ac Voltage: Using Oscope Voltage: 61.4A*66.8V = ~4101Watts Using DMM Voltage: 61.4A*63.6V = ~3905Watts DC5k Clamp Test - Run 2 - Used Pmax Function: http://youtu.be/dKB2PyIQEow Note: Using Pmax function on Clamp Meter Clamp Meter Max AC Current: 76.6A Oscope Max AC Voltage: 69.3V DMM Max AC Voltage: 65.8V Results: Power = Current * Voltage Power = 76.6A* 69.3V = 5308 Watts (Using the oscope voltage reading) Power = 76.6A * 65.8V = 5040 Watts (Using DMM Voltage Reading) DC5K Amplifier Clamp Test - Run3 http://youtu.be/cCEVvoxOSoU Note: I rolled the volume up and down a bit. Might have skewed the results. Clamp Meter Max AC Current: 60.6A Oscope Max AC Voltage: 66.8V DMM Max AC Voltage: 63.3V Results: POwer = 60.6A * 66.8V = 4048 Watts (Using oscope volt reading) Power = 60.6A * 63.3V = 3836 Watts (Using DMM volt reading) DC5K Amplifier Clamp Test - Run4 http://youtu.be/AkLs6PmTjCo Clamp Meter Max AC Current: 53.6A Oscope Max AC Voltage: 69.3V DMM Max AC Voltage: N/A Results: Power = 53.6A * 69.3V = 3714 Watts DC5K Amplifier Clamp Test - Run5 Video: See Post #3 Note: This was my final Clamp Run Clamp Meter Max AC Current: 59.3A Oscope Max AC Voltage: 68.1V DMM Max AC Voltage: 64.2V Results: Power = 59.3A * 68.1V = 3741 Watts Power = 59.3A * 64.2V = 3809 Watts Any thoughts? I was hoping it would be more power than this. Would it make a difference if I go back and reset my gains to the point of clipping and go down a little? I left a pretty big gap when I was setting my gains.

I've recorded new videos. I'm going to post them here after I've uploaded. Apparently the Pmax function on my clamp meter is indeed not working correctly; as a result, I will be driving to Sears today to exchange it for a different one.

So when I clamp the amp do I want my DC Voltage to be above 12.5V? Someone above was asking if I clipped it during the clamp. Would it affect the results if the DC Voltage drops below 12V?

Thanks. I will check this out tomorrow.

Ah power factors and phase angels. I remember solving homework problems like those in my electronic classes but never understood what those numbers ment until now. Multiplying by that power factor number gives the rms? Anyways, back to using the oscope, I don't think my Velleman can give me a current graph and the voltage graph like that lunchbox scope. So should I just clamp it to the point of clipping even if I have to stop the volume knob 2 volume notches before my max tuned?

Thanks.

I have a Velleman Oscope HSP10. I'll hook that up on my next test tomorrow after I charge the batteries over night.

Interesting. How can we figure out what is going wrong? My DC voltage does go from ~14.3V to ~11.4V is this bad for clamp testing? I am wondering if my AC Current Pmax on the clamp meter is messed up.

How can I do this properly?