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<blockquote data-quote="georobu" data-source="post: 1481323" data-attributes="member: 563522">I&#039;m using the polk momo c400.4 amps.&nbsp; These have been tested to do 109.3 x4 at 4 ohm with 14.1 v. I was guessing that in a 6 ohm they&#039;d be doing at least 75x4 rms. I&#039;m running one for my 4 tweeters: 2 front 2 rear. I&#039;m running a second amp bridged. It&#039;s been tested to do 260 x 2 at 4 ohm bridged with 13.75 v. so 250 per mid is underestimated. My ho alt holds the load at around 14.5-14.4v I wouldn&#039;t be surpridsed If I gave them amost 300 a piece. I&#039;m waiting on my third amp to run the rear woofers. Before I bridged the amp on my mids they would get far less midbass and output. I think you need at least 150 watts/woofer to get the most out of these, that&#039;s not to say that they are not efficient.I use 24 db slopes all over, mids are high passed at 80hz.&nbsp; I noticed that low xover points aren&#039;t any good like you said. Move it up to 100hz and you loose all the good midbass.&nbsp; I also bump it up about 5 db at 100hz through the eq.To be honest with you I wanted to get the morels so that my amp would still get a damping factor of 800 bridged.&nbsp; I should have kept the 7 inch seas excel I had before that were 8 ohms. Is going from a damping of 400 to 800 make a noticeable difference in sq?It sounds like you are running a 3 way with 8 inch woofers.&nbsp; How much are you feeding your mids? I tried a 3 way route but I couldn&#039;t get enough output out of the 5.5 excel to hold its own against my woofers, tweeters or subs.</blockquote>

[QUOTE="georobu, post: 1481323, member: 563522"] I'm using the polk momo c400.4 amps. These have been tested to do 109.3 x4 at 4 ohm with 14.1 v. I was guessing that in a 6 ohm they'd be doing at least 75x4 rms. I'm running one for my 4 tweeters: 2 front 2 rear. I'm running a second amp bridged. It's been tested to do 260 x 2 at 4 ohm bridged with 13.75 v. so 250 per mid is underestimated. My ho alt holds the load at around 14.5-14.4v I wouldn't be surpridsed If I gave them amost 300 a piece. I'm waiting on my third amp to run the rear woofers. Before I bridged the amp on my mids they would get far less midbass and output. I think you need at least 150 watts/woofer to get the most out of these, that's not to say that they are not efficient. I use 24 db slopes all over, mids are high passed at 80hz. I noticed that low xover points aren't any good like you said. Move it up to 100hz and you loose all the good midbass. I also bump it up about 5 db at 100hz through the eq. To be honest with you I wanted to get the morels so that my amp would still get a damping factor of 800 bridged. I should have kept the 7 inch seas excel I had before that were 8 ohms. Is going from a damping of 400 to 800 make a noticeable difference in sq? It sounds like you are running a 3 way with 8 inch woofers. How much are you feeding your mids? I tried a 3 way route but I couldn't get enough output out of the 5.5 excel to hold its own against my woofers, tweeters or subs. [/QUOTE]

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