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Posted

is the rise all the time or only fluctuates with the lows?

Rise changes with every Freq.

so in a daily setup, you really shouldnt worry about rise

2014 Chevy Silverado Crewcab

1994 Chevy Full Size blazer

Posted

rise can also be fought with port efficiency and more power. If you have inefficient port then most likely you'll see higher rise. my nominal load is 1.2 the highest I've seen my rise is 1.6. But for the most part the few times I clamped my old amp rise was from 1.2 to 1.5 this was from 40hz to 55, going 40, 45, 50, 55. 55hz is where I saw 1.6 but also everything was hot and my voltage had dropped.

I've read on a few threads where people kept adding power to their subs which was the only thing they changed and their rise kept dropping

Posted

:popcorn: the way people make it out to be is what ever ohm load you wire down to,just think your actually a ohm load higher. example I'm wired to 2ohms but my amp only putting out 4ohm load. bummer :ehh:

At the frequency you tested (or frequency you equipment measured at).

At some frequencies, you may be higher, at others you may be closer to DCR.

Impedance varies with frequency. Only was to know what you have is to test all frequencies and plot the results.

Current system:

1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s

Previous systems:

2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz.

1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz.

Posted

You get less rise as you shrink the box not make it bigger. Look at spl fart boxes small with a lot of port right? And I think rise counts for daily listening and comps. For example myself. I wire at .7 strapped which gives me .35 per amp. I clamped close to 12k out of my amps on a 37hz burp with my rise to 1 ohm. So that's .65 ohms of rise.my setup sounds great on music I can play in the 153s all day now if I was to wire up to 1.4 strapped my final impediance would be around 1.4 or higher. Which in turn would be less power out of my amps to my subs. Would it play music in the 153s I doubt it. Would I try to make it yes lol. And how do I do that? By trying to turn it up and clip my amps. So if you want a average loud system for daily wire it up. If you want it as loud as possible then try to wire it to get the most out of your amp

TEAM DC AUDIO

VEHICLE:98 chevy tahoe 2wd 3-4 drop

HEADUNIT:alpine 9886

PREAMP:arcaudio

FRONT STAGE:4-6 1/2s selinium,DD component set and 4-selinium tweeters in each door

KICKPANELS:jl audio 5 1/4

REAR DOORS: dd components 6 1/2s

HIGHS AMPS:zapco 750.2 on front doors,zapco an another 750.2 on kicks and rear doors

SUBS:4-ascendant audio 18s with 5 spiders in a custom box built by KINGSUV

SUB AMP: 2-dc7.5s

ALTERNATORS: 3-mechmans 1- 425comp, 1-smd spec350, 1-270 with adj voltage harness on custom dc bracket

WIRE:10-runs 0g front to back

BATTERIES:6-d1400s

TL results:157.1 at 38hz and 156.8 at headrest score @37hz. STATE AND NATIONAL RECORD IN MECA S5.

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