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<blockquote data-quote="THATpurpleKUSH" data-source="post: 8739756" data-attributes="member: 615398">Generally you will clamp half power your amp is rated for at its lowest impedance level. Impedance rise at burp frequency is usually 2-4x the original load ( figure 1 ohm load rising to 3 ohms) Coil spec and box design are some of the variables that will affect that but it&#039;s always to be expected.Is there any way to switch to 2 10s? You could get by with a smaller box and maybe get into Street 1 which is 0-750. That would allow you to clamp up to 592w which is near the most you would see out of that amp.If you want to be competitive in that 1500 class then you need to increase cone area (multiple smaller subs that require less airspace) or double the power. The latter might get you a Phat 15 award at a show but I wouldn&#039;t expect it to be top of the class unless there aren&#039;t many other competitors.Low cone area on high power needs an efficient box design.Higher cone area is always inherently more efficient so box design isn&#039;t as crucial if you want to be placing near the top.Invest in a good clamp meter and dmm for your own clamp tests or a Term Lab Magnum which is the official measuring device that Meca uses.</blockquote>

[QUOTE="THATpurpleKUSH, post: 8739756, member: 615398"] Generally you will clamp half power your amp is rated for at its lowest impedance level. Impedance rise at burp frequency is usually 2-4x the original load ( figure 1 ohm load rising to 3 ohms) Coil spec and box design are some of the variables that will affect that but it's always to be expected. Is there any way to switch to 2 10s? You could get by with a smaller box and maybe get into Street 1 which is 0-750. That would allow you to clamp up to 592w which is near the most you would see out of that amp. If you want to be competitive in that 1500 class then you need to increase cone area (multiple smaller subs that require less airspace) or double the power. The latter might get you a Phat 15 award at a show but I wouldn't expect it to be top of the class unless there aren't many other competitors. Low cone area on high power needs an efficient box design. Higher cone area is always inherently more efficient so box design isn't as crucial if you want to be placing near the top. Invest in a good clamp meter and dmm for your own clamp tests or a Term Lab Magnum which is the official measuring device that Meca uses. [/QUOTE]

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