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impendence rise?
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<blockquote data-quote="Crown_amps" data-source="post: 1693829" data-attributes="member: 562002"><p>speakerman525 (1:54:23 PM): <a href="http:////forum/showthread.php?t=154563&amp;highlight=impedence+rise" target="_blank">http://www.caraudio.com/forum/showthread.php?t=154563&amp;highlight=impedence+rise</a></p><p></p><p>speakerman525 (1:54:28 PM): Re -</p><p></p><p>This is just the DC resistance measurement of the coil. It's always a bit less than the "nominal impedence", and really doesn't tell you too much, other than "this is the lowest the impedence will ever dip to, on the impedence curve". (at some frequencies, impedence may rise up very high - a 4 ohm speaker might hit 50 ohms at Fs!)</p><p></p><p>speakerman525 (1:55:27 PM): wont let me post</p><p></p><p>DimmuBorgir932 (1:55:41 PM): well i posted a thread on it feel free to add to it</p><p></p><p>speakerman525 (1:55:45 PM): where?</p><p></p><p>DimmuBorgir932 (1:55:47 PM): <a href="http:////forum/showthread.php?p=1733789#post1733789" target="_blank">http://www.caraudio.com/forum/showthread.php?p=1733789#post1733789</a></p><p></p><p>speakerman525 (1:55:49 PM): wtf</p><p></p><p>speakerman525 (1:55:51 PM): u can post i cant</p><p></p><p>speakerman525 (1:55:52 PM): lol</p><p></p><p>DimmuBorgir932 (1:55:52 PM): click the link</p><p></p><p>DimmuBorgir932 (1:56:05 PM): well im the car audio pimp of all pimps you must see</p><p></p><p>DimmuBorgir932 (1:56:09 PM): jk</p><p></p><p>DimmuBorgir932 (1:56:56 PM): hey everyone</p><p></p><p>with factoring in impendence rise can i run my 4 ohm amp to power a single dual 4 ohm type S which will pull 2 ohms.</p><p></p><p>oh ya the amp is not 2 ohm stable and everyone i asked called me a moron and said dont do it</p><p></p><p>should i run my poor lil parts express 240 watts rms @ 4 ohms into the danger zone of 2 ohms?</p><p></p><p>SPKRMAN thinks i should</p><p></p><p>DimmuBorgir932 (1:57:12 PM): there i just cut and pasted what it said</p><p></p><p>speakerman525 (1:58:06 PM): replied</p><p></p><p>DimmuBorgir932 (1:59:08 PM): this part made me laugh&gt;&gt;technics reciever (oh teh pwnage</p><p></p><p>speakerman525 (1:59:23 PM): man i pwnt that thing so bad</p><p></p><p>speakerman525 (1:59:28 PM): i was a noob back then</p><p></p><p>speakerman525 (1:59:33 PM): which btw</p><p></p><p>DimmuBorgir932 (1:59:34 PM): i got a technics su8600</p><p></p><p>speakerman525 (1:59:37 PM): its downstairs doing HT duty</p><p></p><p>DimmuBorgir932 (1:59:38 PM): 4 channel</p><p></p><p>speakerman525 (1:59:48 PM): and its something like 12 years old</p><p></p><p>DimmuBorgir932 (1:59:49 PM): broken tho</p><p></p><p>DimmuBorgir932 (1:59:55 PM): mine is older than me</p><p></p><p>DimmuBorgir932 (2:00:01 PM): 40 odd pounds</p><p></p><p>speakerman525 (2:00:04 PM): at one point i had 6 12's, all in parralel running off 1 channel</p><p></p><p>speakerman525 (2:00:05 PM): lol</p><p></p><p>DimmuBorgir932 (2:00:09 PM): very very rare now and days</p><p></p><p>speakerman525 (2:00:09 PM): and it ran fine</p><p></p><p>speakerman525 (2:00:15 PM): yea</p><p></p><p>speakerman525 (2:00:31 PM): i had a passive sub xover</p><p></p><p>DimmuBorgir932 (2:00:35 PM): holy shit thats a lot of subs running off one amp</p><p></p><p>speakerman525 (2:00:37 PM): so i used that on one chanel</p><p></p><p>speakerman525 (2:00:41 PM): yea, it ran fine</p><p></p><p>speakerman525 (2:00:53 PM): i didnt know what load it was at</p><p></p><p>DimmuBorgir932 (2:00:53 PM): i like the variable xover on the parts express amp</p><p></p><p>speakerman525 (2:00:56 PM): i just wired it together</p><p></p><p>speakerman525 (2:01:09 PM): but it was... lets see...</p><p></p><p>DimmuBorgir932 (2:01:10 PM): my 8 ohm technics amp will go down to 4</p><p></p><p>speakerman525 (2:01:15 PM): 6 single 4 ohm</p><p></p><p>DimmuBorgir932 (2:01:25 PM): yikes</p><p></p><p>speakerman525 (2:01:25 PM): thats .7</p><p></p><p>speakerman525 (2:01:26 PM): lol</p><p></p><p>speakerman525 (2:01:29 PM): and its an 8 ohm amp</p><p></p><p>DimmuBorgir932 (2:01:36 PM): big heat sink?</p><p></p><p>speakerman525 (2:01:38 PM): no</p><p></p><p>DimmuBorgir932 (2:01:41 PM): crazy</p><p></p><p>speakerman525 (2:01:41 PM): not at all</p><p></p><p>speakerman525 (2:01:51 PM): its just a regular reciever</p><p></p><p>speakerman525 (2:01:54 PM): from 12 yeras ago</p><p></p><p>DimmuBorgir932 (2:01:54 PM): my heatsink gets pretty warm</p><p></p><p>speakerman525 (2:01:58 PM): pro-logic</p><p></p><p>speakerman525 (2:02:03 PM): it gets warm, that means it works</p><p></p><p>DimmuBorgir932 (2:02:08 PM): on the parts express</p><p></p><p>DimmuBorgir932 (2:02:11 PM): lol i know</p><p></p><p>speakerman525 (2:02:21 PM): fosgate amps run smokin hot, because they have a great heatsink design</p><p></p><p>DimmuBorgir932 (2:02:25 PM): but warmer than my buddies kicker 600.1</p><p></p><p>speakerman525 (2:02:32 PM): well thats a kicker ap</p><p></p><p>speakerman525 (2:02:33 PM): amp</p><p></p><p>speakerman525 (2:02:37 PM): they dont even get warm</p><p></p><p>DimmuBorgir932 (2:02:45 PM): i got a old rockford 100z.2</p><p></p><p>DimmuBorgir932 (2:03:07 PM): ya i know i put my hand on it and they subs were wanging it was mental</p><p></p><p>DimmuBorgir932 (2:03:12 PM): wired at 2 ohms</p><p></p><p>speakerman525 (2:03:19 PM):</p><p></p><p>DimmuBorgir932 (2:03:27 PM): but thats 2 ohm stable lol</p><p></p><p>speakerman525 (2:03:37 PM): P</p><p></p><p>DimmuBorgir932 (2:04:06 PM): ok enough winking at me if you were here and winked at me i would punch ya</p><p></p><p>speakerman525 (2:04:07 PM): IMO the most convincing statement is... If nothing else... you can just bring it to the power point it would have been at otherwise without any issues, if that makes you feel better. Although you can probably crank it up anyway.</p><p></p><p>DimmuBorgir932 (2:04:50 PM): and the power point where it would have been other wise is where?</p><p></p><p>speakerman525 (2:04:57 PM): you can set it with a DMM</p><p></p><p>DimmuBorgir932 (2:05:08 PM): my alpine type e's will start to fib at a lil past half volume in a sealed box</p><p></p><p>DimmuBorgir932 (2:05:13 PM): dont have one</p><p></p><p>speakerman525 (2:05:16 PM): <a href="http:////forum/showthread.php?t=63933" target="_blank">http://www.caraudio.com/forum/showthread.php?t=63933</a></p><p></p><p>speakerman525 (2:05:25 PM): they are cheap</p><p></p><p>speakerman525 (2:05:34 PM): and u can just return it after your done</p><p></p><p>speakerman525 (2:05:44 PM): very useful though</p><p></p><p>DimmuBorgir932 (2:05:47 PM): well with my amp the gain is the volume right you saw the pic</p><p></p><p>speakerman525 (2:05:56 PM): yea</p><p></p><p>speakerman525 (2:05:58 PM): same thing</p><p></p><p>DimmuBorgir932 (2:06:15 PM): thats what i asked squeak since i was like...gain half way oh no!</p><p></p><p>speakerman525 (2:06:30 PM): heh</p><p></p><p>DimmuBorgir932 (2:06:46 PM): so wait a sec im lost here</p><p></p><p>speakerman525 (2:07:08 PM): the tutorial doesnt factor in rise</p><p></p><p>speakerman525 (2:07:09 PM): btw</p><p></p><p>DimmuBorgir932 (2:07:21 PM): ahhh ok</p><p></p><p>speakerman525 (2:07:31 PM): but if you set it per the tutorial your well within the safe zone</p><p></p><p>speakerman525 (2:07:35 PM): IMO too low</p><p></p><p>speakerman525 (2:07:40 PM): but like i said, if it makes you feel better</p><p></p><p>DimmuBorgir932 (2:07:53 PM): what do you cross it over at</p><p></p><p>DimmuBorgir932 (2:08:19 PM): i put it near 60 and it sucked balls too mid bassy</p><p></p><p>DimmuBorgir932 (2:08:25 PM): 60 hz</p><p></p><p>speakerman525 went away at 2:11:50 PM.</p></blockquote><p></p>
[QUOTE="Crown_amps, post: 1693829, member: 562002"] speakerman525 (1:54:23 PM): [URL="http:////forum/showthread.php?t=154563&highlight=impedence+rise"]http://www.caraudio.com/forum/showthread.php?t=154563&highlight=impedence+rise[/URL] speakerman525 (1:54:28 PM): Re - This is just the DC resistance measurement of the coil. It's always a bit less than the "nominal impedence", and really doesn't tell you too much, other than "this is the lowest the impedence will ever dip to, on the impedence curve". (at some frequencies, impedence may rise up very high - a 4 ohm speaker might hit 50 ohms at Fs!) speakerman525 (1:55:27 PM): wont let me post DimmuBorgir932 (1:55:41 PM): well i posted a thread on it feel free to add to it speakerman525 (1:55:45 PM): where? DimmuBorgir932 (1:55:47 PM): [URL="http:////forum/showthread.php?p=1733789#post1733789"]http://www.caraudio.com/forum/showthread.php?p=1733789#post1733789[/URL] speakerman525 (1:55:49 PM): wtf speakerman525 (1:55:51 PM): u can post i cant speakerman525 (1:55:52 PM): lol DimmuBorgir932 (1:55:52 PM): click the link DimmuBorgir932 (1:56:05 PM): well im the car audio pimp of all pimps you must see DimmuBorgir932 (1:56:09 PM): jk DimmuBorgir932 (1:56:56 PM): hey everyone with factoring in impendence rise can i run my 4 ohm amp to power a single dual 4 ohm type S which will pull 2 ohms. oh ya the amp is not 2 ohm stable and everyone i asked called me a moron and said dont do it should i run my poor lil parts express 240 watts rms @ 4 ohms into the danger zone of 2 ohms? SPKRMAN thinks i should DimmuBorgir932 (1:57:12 PM): there i just cut and pasted what it said speakerman525 (1:58:06 PM): replied DimmuBorgir932 (1:59:08 PM): this part made me laugh>>technics reciever (oh teh pwnage speakerman525 (1:59:23 PM): man i pwnt that thing so bad speakerman525 (1:59:28 PM): i was a noob back then speakerman525 (1:59:33 PM): which btw DimmuBorgir932 (1:59:34 PM): i got a technics su8600 speakerman525 (1:59:37 PM): its downstairs doing HT duty DimmuBorgir932 (1:59:38 PM): 4 channel speakerman525 (1:59:48 PM): and its something like 12 years old DimmuBorgir932 (1:59:49 PM): broken tho DimmuBorgir932 (1:59:55 PM): mine is older than me DimmuBorgir932 (2:00:01 PM): 40 odd pounds speakerman525 (2:00:04 PM): at one point i had 6 12's, all in parralel running off 1 channel speakerman525 (2:00:05 PM): lol DimmuBorgir932 (2:00:09 PM): very very rare now and days speakerman525 (2:00:09 PM): and it ran fine speakerman525 (2:00:15 PM): yea speakerman525 (2:00:31 PM): i had a passive sub xover DimmuBorgir932 (2:00:35 PM): holy shit thats a lot of subs running off one amp speakerman525 (2:00:37 PM): so i used that on one chanel speakerman525 (2:00:41 PM): yea, it ran fine speakerman525 (2:00:53 PM): i didnt know what load it was at DimmuBorgir932 (2:00:53 PM): i like the variable xover on the parts express amp speakerman525 (2:00:56 PM): i just wired it together speakerman525 (2:01:09 PM): but it was... lets see... DimmuBorgir932 (2:01:10 PM): my 8 ohm technics amp will go down to 4 speakerman525 (2:01:15 PM): 6 single 4 ohm DimmuBorgir932 (2:01:25 PM): yikes speakerman525 (2:01:25 PM): thats .7 speakerman525 (2:01:26 PM): lol speakerman525 (2:01:29 PM): and its an 8 ohm amp DimmuBorgir932 (2:01:36 PM): big heat sink? speakerman525 (2:01:38 PM): no DimmuBorgir932 (2:01:41 PM): crazy speakerman525 (2:01:41 PM): not at all speakerman525 (2:01:51 PM): its just a regular reciever speakerman525 (2:01:54 PM): from 12 yeras ago DimmuBorgir932 (2:01:54 PM): my heatsink gets pretty warm speakerman525 (2:01:58 PM): pro-logic speakerman525 (2:02:03 PM): it gets warm, that means it works DimmuBorgir932 (2:02:08 PM): on the parts express DimmuBorgir932 (2:02:11 PM): lol i know speakerman525 (2:02:21 PM): fosgate amps run smokin hot, because they have a great heatsink design DimmuBorgir932 (2:02:25 PM): but warmer than my buddies kicker 600.1 speakerman525 (2:02:32 PM): well thats a kicker ap speakerman525 (2:02:33 PM): amp speakerman525 (2:02:37 PM): they dont even get warm DimmuBorgir932 (2:02:45 PM): i got a old rockford 100z.2 DimmuBorgir932 (2:03:07 PM): ya i know i put my hand on it and they subs were wanging it was mental DimmuBorgir932 (2:03:12 PM): wired at 2 ohms speakerman525 (2:03:19 PM): DimmuBorgir932 (2:03:27 PM): but thats 2 ohm stable lol speakerman525 (2:03:37 PM): P DimmuBorgir932 (2:04:06 PM): ok enough winking at me if you were here and winked at me i would punch ya speakerman525 (2:04:07 PM): IMO the most convincing statement is... If nothing else... you can just bring it to the power point it would have been at otherwise without any issues, if that makes you feel better. Although you can probably crank it up anyway. DimmuBorgir932 (2:04:50 PM): and the power point where it would have been other wise is where? speakerman525 (2:04:57 PM): you can set it with a DMM DimmuBorgir932 (2:05:08 PM): my alpine type e's will start to fib at a lil past half volume in a sealed box DimmuBorgir932 (2:05:13 PM): dont have one speakerman525 (2:05:16 PM): [URL="http:////forum/showthread.php?t=63933"]http://www.caraudio.com/forum/showthread.php?t=63933[/URL] speakerman525 (2:05:25 PM): they are cheap speakerman525 (2:05:34 PM): and u can just return it after your done speakerman525 (2:05:44 PM): very useful though DimmuBorgir932 (2:05:47 PM): well with my amp the gain is the volume right you saw the pic speakerman525 (2:05:56 PM): yea speakerman525 (2:05:58 PM): same thing DimmuBorgir932 (2:06:15 PM): thats what i asked squeak since i was like...gain half way oh no! speakerman525 (2:06:30 PM): heh DimmuBorgir932 (2:06:46 PM): so wait a sec im lost here speakerman525 (2:07:08 PM): the tutorial doesnt factor in rise speakerman525 (2:07:09 PM): btw DimmuBorgir932 (2:07:21 PM): ahhh ok speakerman525 (2:07:31 PM): but if you set it per the tutorial your well within the safe zone speakerman525 (2:07:35 PM): IMO too low speakerman525 (2:07:40 PM): but like i said, if it makes you feel better DimmuBorgir932 (2:07:53 PM): what do you cross it over at DimmuBorgir932 (2:08:19 PM): i put it near 60 and it sucked balls too mid bassy DimmuBorgir932 (2:08:25 PM): 60 hz speakerman525 went away at 2:11:50 PM. 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