caintrain

WOW, Lol sorry, internal volume before sub displacement and tuning.

LOL, FInally someone posted a pic....did u fabricate those frames yourself? Looks Great!!

doesnt really matter..im looking to design a few for various vehicles, im just looking for people to post some pics of theirs and show some ideas of what kind of stuff they have done

FI BTL 15" dual 2 ohm, wired to 1 Rockford t1500bd The birth sheet wattage is 1700, so after calculation the voltage output should be 41.23. I tested with a dmm to find the voltage and at this level the sub is not as loud as a btl should be. also the amp gets to this 41.23 volts with no punch eq, and very little gain. could anyone explain this because this sub should take all the power of this amp and then some but is not sounding like a btl right now. with twice the voltage output the sub still sounds good, is loud, but the amp gets extremely hot.

no the clip part broke and the wires were really short anyway

I have a pioneer deh 6000 ub that is missing the wires and wire clip, does anyone know where i can get a replacement set?

^^^that being said, when you play music, this resistance will rise a small amount and you will not get to a true 500 watts.

when you wire a sub to any "ohm value", you are changing the resistance that your amp will see. Thus, wiring to 2 ohms, your amp sees 2 ohms of resistance and can push the desired 500 watts.

sorry for so many questions, just wanna get everything right the 1st time! Being your first DIY build do not expect to get everything right the first time...that being said take your time on your install and maybe have someone with you that knows what they are doing to check you along the way and make sure you are doing the little things properly...are you building a box as well or getting one made for you?

Is that NET volume or gross volume? How much port areea, and to what is it tuned to? Because the BTL doesn't sounds loud enough to you doesn't means it's not getting the 1700 watts. Actually, as stated above by KU40 and myself, the sub will likely never reach it's full output potential. However, that is not an issue with the amp, it is simply how dynamic impedance functions in a loudspeaker system. The bottom line is, the amp is set with the DMM and is showing the proper voltage. This being the case, we can rest assured the amp is set up to deliver the proper power. Now he needs to focus on the real reason for it not being as loud as he thinks it should be... Install Right. You gotta tell us what boxes the BL and BTL are in, otherwise this whole comparison thing is worthless. And if you don't think the calculations are right for the BTL box, why don't you tell us so we can verify? You gotta give us something to work with here. It's impossible to solve a problem if you don't even know the variables. Don't get me wrong guys...I sense you are getting annoyed, and I really respect and need your opinions...I am just trying to understand everything and I am getting frustrated. Thank you for all of your input it has been a world of help. The external dimensions are: H: 16 W: 30 D: 20 Port width: 3 Port length:22 I think this is close to 3.6 cubes, at close to 32Hz

So a "fart Box" could be used to maximise spl for a competition if you knew a song that had long single frquency bass?

I realize this is somewhat subwoofer dependent, but what are the best tuning frequencies for different goals like spl or sq. Also what would be a good way to match a subwoofer to the goals, T/S parameters? Any help would be appreciated, thanks.

LOL, could you elaborate on "fart box"?

OK thanks for the input

I am starting to build boxes and I am getting the hang of it...my friends are asking for me to build them boxes, some with different system goals than others. I would like to know if there are different frequency ranges that will be better for SQ...daily spl...competition spl...etc Tell me what you think.

Is that NET volume or gross volume? How much port areea, and to what is it tuned to? Because the BTL doesn't sounds loud enough to you doesn't means it's not getting the 1700 watts. Actually, as stated above by KU40 and myself, the sub will likely never reach it's full output potential. However, that is not an issue with the amp, it is simply how dynamic impedance functions in a loudspeaker system. The bottom line is, the amp is set with the DMM and is showing the proper voltage. This being the case, we can rest assured the amp is set up to deliver the proper power. Now he needs to focus on the real reason for it not being as loud as he thinks it should be... Install I am trying to make sure the amp is not the problem...he bought it used from a kid that had the level turned ALL the way up, thats why I am trying to figure the amps so i can get the wattage...the reason i think it should be louder is because with everything the same except sub and amp, he had a BL with a hifonics 1600 and it was louder than this is now, that is where i am getting how loud i think a btl "should be"....i dont know how loud it should be but i know it should be louder than a BL

Is that NET volume or gross volume? How much port areea, and to what is it tuned to? Because the BTL doesn't sounds loud enough to you doesn't means it's not getting the 1700 watts. that is net and tuned to 32 hz...the problem is that i calculated on re calc so both of those numbers are way off im sure

Just read the noob proof tutorial pinned to this section of the forum.. It was pinned because it was useful.. so READ! I did read that but it leaves important small details out, also it does not tell you how to measure amps in a circuit so i can know the actual wattage being put out.

And the setting on the dmm should be on VAC right?

OK...i know this is going to annoy you but i am asking anyway...should i test the voltage with the sub hooked up to the terminals, or some other 1 ohm resister?

Like I said, I want to figure out what wattage its putting out. And i asked about other electrical upgrades and if it would help the amp put out more wattage at this volt level....what else would you reccommend i look into sandt38?

Thanks impious, OK. we changed out his 5 awg, to 4. This is still not helping. With this amp and tis sub I feel it should be way louder. The amp reaches its calculated output voltage with the punch eq set on zero and the gain on just below level 3. I dont feel like the amp is kicking out the 1700 watts it is supposed to, do u think with 0 awg and big three and another battery it will be able to kick out more wattage at this 41 volts. also i tried measuring the ampheres so i could see what wattage (voltsX amps) it was putting out but i am unsure how to do this, anyone have pics or vids with this. I am really stumped here. Thanks guys.

I absolutely cannot get away from it, and I was wondering what keeps everyone else coming back for more and more. For me its the undeniable feel of a subwoofer rattling your chest, and knowing you made it all happen.

Also when doing the gain setting calculation...=SQrt(RMS WATTAGE*IMPEDANCE) is the impedance the sub impedance or what it is wired to?

it is a trunk install and it is in a 3.5 cube box....calculated on RE calc. I know this is bad and since i have made a box calc and have gained substantial knowledge through this site. the box cant get any bigger and fit in the trunk tho.