Michael Dean Posted January 18, 2017 Report Share Posted January 18, 2017 looking to upgrade my subs to two summo xl 10d4 @ 1 ohm on a Rockford fosgate t1500bdcp. Box is 3 cu-feet tuned at 38hz. How will these subs sound on this amp in this box? 1000 rms 2000peak 240oz double stack mag?? Any info on these would be great. Thanks Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted January 18, 2017 Report Share Posted January 18, 2017 What are the dimensions of the port? "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Michael Dean Posted January 19, 2017 Author Report Share Posted January 19, 2017 1 hour ago, Triticum Agricolam said: What are the dimensions of the port? The port on my box is 7x3x11.5 rectangle in my current box Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted January 19, 2017 Report Share Posted January 19, 2017 Your port is much too small. You will want at least 45 sq in of port area. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Michael Dean Posted January 19, 2017 Author Report Share Posted January 19, 2017 7 hours ago, Triticum Agricolam said: Your port is much too small. You will want at least 45 sq in of port area. So I found the specs for the 10d4 summo xl and it said for 2 10s ported 2.9 cu.ft and port area 26.25 and my current port is 21 (7x3) cu inches so super close but not 45. For their 15s it calls for 45 port not their tens. And for my port and can go longer and shorter but not w or h. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted January 19, 2017 Report Share Posted January 19, 2017 Unfortunately a lot manufactures really give terrible recommendations when it comes to port area and Massive Audio is one of them. 26.25 sq in of port area is really small for size of box, tuning, and input power you are going to be running. You will be throwing a lot of low frequency output away with that size of port. This may not be what you want to hear, but the best thing for you to do would be to build a new box to the proper specs. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Wehan Posted January 19, 2017 Report Share Posted January 19, 2017 Listen to Triticum Agricolam, he has build more boxes and speakers than you could imagine = he knows his shit. Link to comment Share on other sites More sharing options...
Michael Dean Posted January 19, 2017 Author Report Share Posted January 19, 2017 1 hour ago, Triticum Agricolam said: Unfortunately a lot manufactures really give terrible recommendations when it comes to port area and Massive Audio is one of them. 26.25 sq in of port area is really small for size of box, tuning, and input power you are going to be running. You will be throwing a lot of low frequency output away with that size of port. This may not be what you want to hear, but the best thing for you to do would be to build a new box to the proper specs. Thank you for that info. I may be able to modify the egsisting port to get more port area? I could go 7x6 to a 41 port area? Does this sound like a good idea? Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted January 19, 2017 Report Share Posted January 19, 2017 Yeah a 7"x6" port would be a lot better, and would probably be acceptable for what you want to do. Just keep in mind that as a port increases in area it has it increase in length to keep tuning the same. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
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