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Nope, efficiency would remain the same aswell. Sensitivity is based on the relationships between motor force, cone area and moving mass.

they are now 1db louder on the epic, and god they now dig low and make the roof flex more than ever. i won't change sub every three to six month now, these stay in my car for a long time

What part of Kansas are you from?

A story comes with this picture. I went on vacation with my family to Maine and it rained from the moment we landed to the moment we left EXCEPT for the 5 hours we went out on this old sail boat. While out there I shot this image of one of the other boat sailing. Enjoy. Andrew

Yea unfortunately and its gonna be 95* tomorrow with like 93% humidity, Its so hot I cant roll down my windows to smoke without sweatin my balls off. Easy solution, stop smoking

Ultimately you can't just arbitrarily adjust Cms without consequence even if it doesn't directly impact sensitivity. If you look at the BTL example I posted earlier, the Fs jumped by nearly a half octave when we halved Cms. So the engineer is going to have to balance Cms (and sensitivity) with the other performance goals for the driver.

Team SSA is not responsible for possible side effects of (and probable embarrassment resulting from) experiencing The Brown Note Team SSA is proud to be responsible for the 1st place trophy you just lost.

Clamping the DC side of the amp would tell you how much power the amplifier is drawing from the electrical system, not outputting to the speaker. When someone "clamps" an amp they are measuring the output side of the amp, which is AC. They normally keep a DMM on the power input side to monitor what the input voltage is dropping to, but that's not how they are deriving their power output figures. Anyways.....many people fall under this delusion that they are performing some meaningful act by "clamping" their amplifiers. As Crazy said, they connect their amplifier to a load (normally just a subwoofer in most cases) and play a test tone. They then use a DMM to measure the voltage output from the amplifier and a clamp meter to measure the current on the output side of the amplifier while playing the test tone. They then use basic ohms law to calculate power (Voltage * Amps = Power) and the impedance of the load (Voltage/Amps = Resistance). As I previously mentioned, most people will also use a DMM on the power input side of the amplifier to monitor the voltage drop the electrical supply is experiencing. The problem is, 99% of the time people are simply wasting their time. It's a mostly meaningless endeavor that has been perpetually (and incorrectly) promoted on the internet as having actual relevance. There are several problems with this method. Along with being able to question the accuracy of the measurements themselves for various reasons (accuracy of the devices, the type of measurement being conducted, the varying impedance of the load, the varying stability of the supply, etc), many people try to compare these "clamp test" results to the manufacturer rated power. The problem is, the manufacturer's rated power is specified at a certain distortion level. Nobody performing these clamp tests are measuring distortion. One could make any amplifier appear highly underrated very easily in one of these "clamp" tests as there is a total disregard of distortion.

New Eclipse HU courtesy of Mr. M5. I just had time to play with it today, and it's WAY better than my Pioneer 880 in my opinion. SOOO much easier to use. Welded the amp rack out of thin wall 3/4" square steel tube. Painted with an automotive grade PPG paint. I put the subwoofer box from my last set up in just for some bass. This is NOT how it's going to be finished, lol.

The funny thing to me is I'm lookin for those kind of numbers in a similar situation. I've only got a single 12" right now and I'm getting ready to test it out hard core to the max and see if I can come close to hitting a 145. I'm gettin clamped and metered again soon so I will make sure to take vids. If I double the cone area and power and come close to a 150 then why not?? It's very similar to what I'm lookin for. To say he didn't do it when he's the one with proof is shitty to me. He has the equipment and power to do it so it's questionable. To flame and say he should be banned for stupidity is not so. That is a discreditation to the site if you ask me.

I'll save Nick the trouble. Speakers are dumb, they do what you tell them to do. Sending it a clipped signal generates more heat in the coil than sending a little more than CLEAN rated power will. (open to debate I know, but I agree with it) You sent it a clipped signal, and you knew it, now it's blown. It sucks, I know, but if you get the signal problem fixed and get the sub reconed, you'll be better off than you were before.

first vid

Because doubling the suspension is changing it mechanically, not electrically like sensitivity is calculated? If you divided Cms by half, would that change efficiency?

djteks, Turner ... honestly, you need to hit a good number at a show, not in a garage/shop to have good braggin rights. Videos of people (other than your crew), car, termlab and a judge. Bickering is just useless. (I learned quickly) Gain enough points to be in a finals event, regionals, or something. This should settle everything. And may gain better respect. Best of luck sir. Just a suggestion ........