Broken Tinsel Lead

[NDMstang65 403]

.5ohm is hard on everything (its really .375) amps, subs both...

Your amps are attempting to put out more current and less voltage...just how ohms law works....in turn gobs of current = broke subs and life of amps diminished by a long shot. 2kw for the subs would be fine, as that would be what we recommend.

[Fi Car Audio 64]

OK.... in looking at the pic and reading through the whole post, I think Nicks assesment is right on.

High current becomes the problem in more and more applications. As previously stated, when you are running things below 1 Ohm, you are running more current than voltage, which for a given lead wire size, becomes a problem. We really first ran into this issue with the JBL Crown amps and peoples tendency to run them in high current mode vs high voltage. You get the same power out of these, but with the philosophy that the lower the Ohm load the better... people were popping coils and leadwires like fuses. Trying to get 8000W out of a Crown in high current simply became a nightmare... but pulling 8000W in high voltage was simple and the coils and wires didnt care. Watts is watts... and most of your Watts electrical being applied to your sub simply gets scrubbed off as waste heat. So there isnt a change in the Watts electrical to Watts acoustic equation... but there is between current and voltage to achieve the same results.

1900W at .5 Ohms comes down to about 62 amps and 31 Volts... thats a far cry from 43.6 Amps and 43.6 volts at 1 Ohm or 31 Amps and 62 Volts at 2 Ohms. Given the same wire, it is much happier with the higher voltage and lower current. Now if people could build cheap high power amps that made max power into 8 Ohms... we would all be happier. Thinner lighter coils, tighter gaps, smaller motors, all to do the same job and make speakers cost less. 15.4 Amps and 123 V... really easy current load but 8 Ohms simply doesnt sound as cool as .5

In my honest opinion the sub was run with too much current, and may or may not have been clipped... I wont argue that one. I really never thought Id see the day when I would have to rate my products in terms of current handling capability. Many years ago I did run hi-pot tests on different types of coils to see what issues I would have. Most would take over 1000V without issue. At that much voltage and 1900W, you would only be running 1.4 amps... but that could give you one heck of a shock if you were inclined to touch the terminals or lick them

I know none of this solves your problems... if you are up to it, I can send you out a tinsel lead and new dustcap to replace things with. By far the easiest and least expensive swap to do (vs shipping it back).

Thanks,

Scott

[the727kid 1]

Cool, I think have an understanding of things a lil better now. How much it would it cost for a new dustcap and lead, and how hard is it to do?

[Fi Car Audio 64]

Not too difficult. Go ahead and send me an email to [email protected] and Ill get your shipping info and phone number.

Thanks,

Scott

[the727kid 1]

Alright you have e-mail.

[the727kid 1]

How much would it be to recone to 15s?

[the727kid 1]

Bump, Scott did you get the tinsel leads out?

[Fi Car Audio 64]

Yes I did. But I didnt get them out until a couple days later as I saw your email stating that you wanted the extra heavy leads as well (so I sent both). You should have them Tues or Weds.

Thanks and have a good weekend,

Scott

[the727kid 1]

Alright appreciate it very much!!

After examing the subs a lil more I think the issue may have been the felt padding wrapping around tinsel lead.

I can't wait to have these babies back in, didn't really start missing them until I put the old TIs in lol.

[dopey 0]

Alright appreciate it very much!!

After examing the subs a lil more I think the issue may have been the felt padding wrapping around tinsel lead.

I can't wait to have these babies back in, didn't really start missing them until I put the old TIs in lol.

The felt didn't "wrap around" the tinsel. The tinsel beat the felt to fluff. You are running your subs too hard.

[vladd 26]

I'd guess red hot tinsels probably caused the felt to stick to the tinsels like glue