Would someone double check my numbers here? Not sure if tuning is correct.

[germanyt 10+ year member]

I have very carefully calculated the net volume at 1.609 cubic feet. My port is an octo with 2 inch internal sides so 19.3 sq inches of port with 1/2 inch roundovers on both ends. Length is 24.5 inches and part of the port has a common wall with the corner of the box so maybe a slight end correction factor.

I think my tuning is 34 hz. Customer contacted me the other day and tells me his frieds are saying it should be louder. He's using 2 CT tropo 8s with, i think a 500 watt amp. Ive seen a video of them playing and they look to move just fine and by his description the port velocity is okay. He asked me if the subs were 'unloading'. A term he must have picked up off of his friend. I explained to him what that meant and said i doubt it. Not only is is recommended volume but the back of the box is like 2 inches from the motor. Im thinking maybe my tuning is low, like really low. But maybe i did my math correctly. Can someone check for me? Thank you.

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[Papermaker85 5,000+ posts]

Pic of said port? 2"per side on the cuts?

 

[germanyt 10+ year member]

 

[Papermaker85 5,000+ posts]

Looks great. I'll do the math..

 

[Papermaker85 5,000+ posts]

Looks close to me 33-34hz

 

[dbjunior 10+ year member]

I'm not a fan of a lot of ct subs could be the subs are just not good for ported. Its also only 2 8's in an underseat box can't expect to much from it.

 

[germanyt 10+ year member]

I'm not a fan of a lot of ct subs could be the subs are just not good for ported. Its also only 2 8's in an underseat box can't expect to much from it.

This was my thinking as well. Not only is it a weak sub but its underpowered. Probably getting 200 rms at best to each sub. I just hate to have a customer contact me and say they arent happy.

 

---------- Post added at 06:48 AM ---------- Previous post was at 06:48 AM ----------

 

Looks close to me 33-34hz

Thanks man. I was pretty sure on it but wanted another opinion.

 

[Papermaker85 5,000+ posts]

This was my thinking as well. Not only is it a weak sub but its underpowered. Probably getting 200 rms at best to each sub. I just hate to have a customer contact me and say they arent happy. 

---------- Post added at 06:48 AM ---------- Previous post was at 06:48 AM ----------

 

Thanks man. I was pretty sure on it but wanted another opinion.

**** you in BR. we need to hookup..

 

[germanyt 10+ year member]

**** you in BR. we need to hookup..

Actually Ponchatoula over by Hammond. But hell yea.