Hobbs155 Posted August 19, 2011 Author Report Share Posted August 19, 2011 Does anyone think its my enclosure that is too big or small or port tuning? HU: Alpine CDA-9886 with Imprint Module Fronts: Alpine SPR-60C Rears: Alpine SPR-60 Amps: Alpine PDX4.150 and ICE Power 20000D Subs: 1 x 15" Rockford T2D215 Big 3 Upgrade 0/1 AWG 2 Farad Cap Wiring 2 AWG 120Amp ALT Link to comment Share on other sites More sharing options...
Hobbs155 Posted August 19, 2011 Author Report Share Posted August 19, 2011 So I connected another amp, this one is supposed to put out 1200W RMS at 1ohm and 700W RMS at 2ohm, i thought i had wired my subs correctly but i obviously hadn't because i connect my DMM to the terminals at the back of the box and the reading came out 2.3ohms, so i take it that the amp would see 2ohms and only put out around 700W RMS to both subs which is clearly going to be a problem, so i disconnected the one sub and still got a 2ohm reading, so now i thought i was making a bit of progress, but i turned it out and the sub sounds ok on some basses but the lows you can hardly hear or feel and they are moving a heap of air. I port in a make shift port which i worked out on 12volt.com that should give me a tuning frequency of 29hertz, My box specs in inches 16.62 (Width) x 14.1(Height) x 14.9 (Depth) 0.74 (Thicknes) = 1.68 cubic feet - 0.181 cubic feet sub displacment should give me a interal box volume of 1.499cbic feet per chamber. My port lenghts, i tried 3" x 3.5" (sounds terrible for low end bass) 2.36" x 7.62" (Sounds ok but still not loud) that should = 29Hz tuned. I want to feel the lows and make the door panels zing with the higher bass. I'm not sure what i should be doing from this point, the back of my subs are wired up + and + joined and - and - joined via a jumper and then + and - from the one set to the terminals at the back of the box, that gives me 2ohms for one sub, when i connect the other sub the same, they both go to the same terminal at the back of the box they still give me 2ohms. acording to diagrams it should give me 1ohm if i have both subs connected. I dunno .... HU: Alpine CDA-9886 with Imprint Module Fronts: Alpine SPR-60C Rears: Alpine SPR-60 Amps: Alpine PDX4.150 and ICE Power 20000D Subs: 1 x 15" Rockford T2D215 Big 3 Upgrade 0/1 AWG 2 Farad Cap Wiring 2 AWG 120Amp ALT Link to comment Share on other sites More sharing options...
bassrace Posted August 19, 2011 Report Share Posted August 19, 2011 I told you how to check if your speakers blown. Take one sub and it 2 voice coils so take the negative and positive from one coil and put -/- +/+ to the amp if the subs working then it works, do the same thing with the other coil on the same sub, then repeat with sub 2. Simple? Edit:didnt see second page.lol hook up the dmm to each coil individually before u do that test the dmm by taking the negative on dmm and holding against positive on dmm and whatever it reads subtract that from what ohm ur reading on the subs 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
sayhuh? Posted August 19, 2011 Report Share Posted August 19, 2011 Fist, I must see pics of this 10k watt amp or the fuse sizes. Next, check you sub sonic and low pass filter and make sure they are adjusted correctly. Blown Link to comment Share on other sites More sharing options...
Hobbs155 Posted August 19, 2011 Author Report Share Posted August 19, 2011 yea i did that and the subs are making sound, not scratching or anything like that, the ohms on the DMM are also stable and not jumping around, i read somewhere that if the subs are blown the ohm reading will also not be stable and depending no how its blown subs subs might make a scratching noise, i'm pretty confident now the subs are not blown. Thank you for you advice, never had to check a sub if its blown before. HU: Alpine CDA-9886 with Imprint Module Fronts: Alpine SPR-60C Rears: Alpine SPR-60 Amps: Alpine PDX4.150 and ICE Power 20000D Subs: 1 x 15" Rockford T2D215 Big 3 Upgrade 0/1 AWG 2 Farad Cap Wiring 2 AWG 120Amp ALT Link to comment Share on other sites More sharing options...
bassrace Posted August 19, 2011 Report Share Posted August 19, 2011 Youre checking the dmm with everything off right? 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
Hobbs155 Posted August 19, 2011 Author Report Share Posted August 19, 2011 @bassrace, i will check each coil individually and also subtract the difference from the DMM check. Didn't think about that. @sayhuh, unfortionalty there are no external fuses on the amp you can visually see.... when i get a momement i will go and take some pics for you to see. There is also a link on page one of this thread to the manufacturer. What would you guys recommend i set my subsonic and lpf to, at the moment i think its set at 25hz subsonic and 80hz lpf. HU: Alpine CDA-9886 with Imprint Module Fronts: Alpine SPR-60C Rears: Alpine SPR-60 Amps: Alpine PDX4.150 and ICE Power 20000D Subs: 1 x 15" Rockford T2D215 Big 3 Upgrade 0/1 AWG 2 Farad Cap Wiring 2 AWG 120Amp ALT Link to comment Share on other sites More sharing options...
bassrace Posted August 19, 2011 Report Share Posted August 19, 2011 Do you have around 16 sq in of port per cube? 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
Hobbs155 Posted August 19, 2011 Author Report Share Posted August 19, 2011 yes i removed the speaker cables from the box terminals and tested it at the box terminals, so no input power was going in. How do i calculate if i have 16sq inches of port per cube? HU: Alpine CDA-9886 with Imprint Module Fronts: Alpine SPR-60C Rears: Alpine SPR-60 Amps: Alpine PDX4.150 and ICE Power 20000D Subs: 1 x 15" Rockford T2D215 Big 3 Upgrade 0/1 AWG 2 Farad Cap Wiring 2 AWG 120Amp ALT Link to comment Share on other sites More sharing options...
bassrace Posted August 19, 2011 Report Share Posted August 19, 2011 Dont really know on the ssf setting b/c I would really have to be there to feel comfortable telling you where to set it. 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
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