Impedence rise question

[Matt A 10+ year member]

I have a 3500d.1 rated at 4300 rms at 1 ohm...it is currently wired to 1 ohm using 4 dual 2 woofers... after box install and months of break in I clamped the power and saw that on a burp at 47 hz (max frequency) i was only sending 1800watts to the subs with the car running and 1400 watts when the car is off. Should i wire the amp down to .25 daily? or should i get another of the same amp and do each at .5? also is box rise added or multiplied to the nominal ohm load? thank you

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[ahole-ic]

I have a 3500d.1 rated at 4300 rms at 1 ohm...it is currently wired to 1 ohm using 4 dual 2 woofers... after box install and months of break in I clamped the power and saw that on a burp at 47 hz (max frequency) i was only sending 1800watts to the subs with the car running and 1400 watts when the car is off. Should i wire the amp down to .25 daily? or should i get another of the same amp and do each at .5? also is box rise added or multiplied to the nominal ohm load? thank you

You should do none of those things. Your rise varies with frequency, so at other frequencies your impedence will actually drop, causing you to blow your amp. I'd suggest just getting a single amp that is stronger at 1 ohm.

 

[Matt A 10+ year member]

Ic... This is mainly a dB drag street c vehicle so what amp would you recommend?

 

[psychoacoustics 10+ year member]

You should do none of those things. Your rise varies with frequency, so at other frequencies your impedence will actually drop, causing you to blow your amp. I'd suggest just getting a single amp that is stronger at 1 ohm.

impedance will NEVER be lower than the 1 ohm he has it wired to it will however rise to its highest point at tuning

 

[sacsking916 5,000+ posts]

Ic... This is mainly a dB drag street c vehicle so what amp would you recommend?

Sd12k

 

[Matt A 10+ year member]

Sd12k

Will it be able to bass race 139.9 all day and give demos without frying at 1 ohm?

 

[LosIsATool 5,000+ posts]

Not on a single 250 amp

 

[Matt A 10+ year member]

Thats why street c makes it hard to gain for daily //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[Matt A 10+ year member]

Do you add the box rise or do you multiply it to the nominal load at the amp?

 

[psychoacoustics 10+ year member]

it adds

 

[pimpnyou204 10+ year member]

I had a 3500 and it was terrible with imp rise.

 

[sacsking916 5,000+ posts]

Will it be able to bass race 139.9 all day and give demos without frying at 1 ohm?

my teammate does in his street c rex. iirc he was bassracing 149.9 for a little bit. but after his runs he gives demos for quite awhile