8UWITH6 Posted February 4, 2012 Report Share Posted February 4, 2012 Alright fellas. I recently bought some T1's that came in a vented box that somebody had modified, poorly. I am trying to rebuild the port and back of this enclosure to make it usable. It is a rectangle shaped box. INSIDE measurements are 31.5" L, 18.25" D, 11" H. By my calculations total air space is around 3.66 cuft. Material is 3/4" MDF all around the enclosure and for some reason they used 1" MDF on the top and bottom. The slot port opening is 11" H by 5.5" Wide. (pretty big I thought) I need help reconstructing the port. Im open to opinions on tuning frequency in relation to port length. I am trying to leave the most mount of air space for the dual 12" subs. More than likely I will put my old school Rockford Fosgate Punch HX2's in this and put it in my wifes SUV. It looks like I can get close to 3 cubes for the subs, and the rest of the enclosure will be taken up by port area. I am actually okay with lengthening the slot port outside of the enclosures measurements if need be. I can take pictures if needed. Thanks for helping out in advance. 1986 Buick Regal Grand National(1) RFD2210 1.25 CUFT @ 38hz Slot PortRFX-9420, Punch 4080dsm, Power 250m22003 Mercury Marauder - Dark Blue PearlDDX-419, T600-4, T2652-S, HPC2205 (Currently Working on Designing an Enclosure) Link to comment Share on other sites More sharing options...
alaskanzx5 Posted February 4, 2012 Report Share Posted February 4, 2012 well not any help for you but how does that 220 amp alt hold up agiant the 600.4 and 1500.1? ive got a 1500.1 and im gonna be getting a 400.4 and a 220 amp mechman alt just wondering how it might handle. t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz. Link to comment Share on other sites More sharing options...
Joe X Posted February 4, 2012 Report Share Posted February 4, 2012 That enclosure as you suspect is way small, according to RF the enclosure should be: 3.5cuft@40Hz. Partly to blame is the gigantic 0.308 driver displacement of the T1 12"s. Unless you mount the subs backwards and/or use completely external ports you won't be able to meet the RF's spec. I would make a new enclosure if I had the space for simplicity and better aesthetics. Link to comment Share on other sites More sharing options...
8UWITH6 Posted February 5, 2012 Author Report Share Posted February 5, 2012 well not any help for you but how does that 220 amp alt hold up agiant the 600.4 and 1500.1? ive got a 1500.1 and im gonna be getting a 400.4 and a 220 amp mechman alt just wondering how it might handle. At idle its marginal, need another battery. At 1200-1500rpms it is great. I bang my system 10 miles to work, and 10 miles home. Battery is always charged, etc. So it seems to be keeping up just fine. 1986 Buick Regal Grand National(1) RFD2210 1.25 CUFT @ 38hz Slot PortRFX-9420, Punch 4080dsm, Power 250m22003 Mercury Marauder - Dark Blue PearlDDX-419, T600-4, T2652-S, HPC2205 (Currently Working on Designing an Enclosure) Link to comment Share on other sites More sharing options...
8UWITH6 Posted February 5, 2012 Author Report Share Posted February 5, 2012 That enclosure as you suspect is way small, according to RF the enclosure should be: 3.5cuft@40Hz. Partly to blame is the gigantic 0.308 driver displacement of the T1 12"s. Unless you mount the subs backwards and/or use completely external ports you won't be able to meet the RF's spec. I would make a new enclosure if I had the space for simplicity and better aesthetics. Yes it was small for the T1's. I have the T1's in another enclosure. The enclosure I am "rebuilding" will be used for some old HX2's or Punch DVC's. So 3 cubes should be okay. I am just trying to salvage the enclosure into something useful for a pair of 12s. Any help on the port length would be great. Ill take a pic in a few minutes so everyone can see what Im working with. Thanks 1986 Buick Regal Grand National(1) RFD2210 1.25 CUFT @ 38hz Slot PortRFX-9420, Punch 4080dsm, Power 250m22003 Mercury Marauder - Dark Blue PearlDDX-419, T600-4, T2652-S, HPC2205 (Currently Working on Designing an Enclosure) Link to comment Share on other sites More sharing options...
8UWITH6 Posted February 5, 2012 Author Report Share Posted February 5, 2012 Here is what it is. 1986 Buick Regal Grand National(1) RFD2210 1.25 CUFT @ 38hz Slot PortRFX-9420, Punch 4080dsm, Power 250m22003 Mercury Marauder - Dark Blue PearlDDX-419, T600-4, T2652-S, HPC2205 (Currently Working on Designing an Enclosure) Link to comment Share on other sites More sharing options...
Joe X Posted February 6, 2012 Report Share Posted February 6, 2012 The dual HX2 will barely fit, using two 4" aero ports, here is the spec: Enclosure Specifications: Fb = 35,982 Hz Vb = 3 ft^3 Internal Height = 11 in Internal Width = 31,5 in Internal Depth = 18,25 in Port Quantity and Dimensions: Number of Ports = 2 Aero Port Diameter = 4 Aero Port Length = 14 1/2 Bear in mind that they won't sound best on that spec. Link to comment Share on other sites More sharing options...
8UWITH6 Posted February 7, 2012 Author Report Share Posted February 7, 2012 I am not using aeroports. I am trying to salvage the enclosure you see in the pictures. I am looking to repair the slot port that is already constructed. The air space in the box is not going to change. I am just simply wanted some input on how and what length to make the slot port. Whether I can cut it at say 12" length or if it needs to be 18" total or so and bend around the back wall of the enclosure. KEEP IN MIND I planned on using my 12s. I also have a pair of HX2 10's. That may be a better option. Thanks 1986 Buick Regal Grand National(1) RFD2210 1.25 CUFT @ 38hz Slot PortRFX-9420, Punch 4080dsm, Power 250m22003 Mercury Marauder - Dark Blue PearlDDX-419, T600-4, T2652-S, HPC2205 (Currently Working on Designing an Enclosure) Link to comment Share on other sites More sharing options...
8UWITH6 Posted February 9, 2012 Author Report Share Posted February 9, 2012 Anybody, please. Any input is appreciated. Just trying to reconstruct this port "properly" 1986 Buick Regal Grand National(1) RFD2210 1.25 CUFT @ 38hz Slot PortRFX-9420, Punch 4080dsm, Power 250m22003 Mercury Marauder - Dark Blue PearlDDX-419, T600-4, T2652-S, HPC2205 (Currently Working on Designing an Enclosure) Link to comment Share on other sites More sharing options...
Joe X Posted February 9, 2012 Report Share Posted February 9, 2012 The box is way big for 2 HX2 10" be aware that the follwing suggestion is not a proper design has excessive port area, this was done to take up the also excessive net internal volume which should be 2 cubic feet according to RF for 2 HX2 10" drivers: Enclosure Specifications: Fb = 35.2 Hz Vb = 2.321 ft^3 Subwoofer Mounting = Front Mounted Internal Height = 11 in Internal Width = 31.5 in Internal Depth = 18.25 in Port Width = 4 1/4 in L Port Internal Assembly Parts: Front to Back = 14 x 11 Extension = 16 1/4 x 11 Let me know any questions. Link to comment Share on other sites More sharing options...
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