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mothra

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About mothra

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    140db
  • Birthday 07/03/1981

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    NOLA
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    Cars, Sports, Science, just about anything.

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  1. even if your amp did create a dirty signal at .5 ohms compared to 1 ohm, you can't get rid of that. that's an amp issue. the DD1 is helping you get the gain matched to the signal output from your source with overlap if desired.
  2. considering all things equal, I'd go with more cone area especially in this case. while you're considering depth, I tend to lean toward large subs. I just find that larger subs tend to have a more appealing sound when it comes to low end extension. is their a reason you're not considering 12s?
  3. Audiocontrol's Three.2 and Four.1 have a parametric sweep of 40-80.
  4. try grounding the RCAs before you go removing a bunch of stuff and rewiring a new head unit.
  5. what track are you using? measure after the amp.
  6. the correct way is the run a full range left and right signal into the epicenter. outside of that I would not install it. it's not going to do much for you since you have a radio that has subwoofer controls already.
  7. mothra

    port question

    explain how low port area is not desirable? large ports are just cosmetic. in a ported enclosure the port takes over musical playing when the sub/speaker can no longer do so, when they overlap that's where the db gain comes into play. so if you tune low, it's the port that's playing those notes. complementing that with a higher port velocity allows that port to move similar air as a large speaker. having a low port velocity will cause the port to not play notes through, it'll have air settling in the port especially when you have a large port area. since we are in his forum, I guess that Steve has too little port area and too high of a velocity too. he didn't rip that phone book to shreads b/c he has a low port velocity. he ripped it b/c it has a high port velocity.
  8. mothra

    port question

    I have a couple simple rules, port shouldn't be longer than 20" and velocity shouldn't be lower than 20m/s. port area shouldn't be a target when designing an enclosure. keeping port length under 20" will prevent having port resonance and port wall flexing. having a velocity of 20m/s minimum allows to tune lower and still keep a really responsive system.
  9. mothra

    port question

    with 4 6" ports in a 7.5 cube enclosure, I'd love to know how that's going to get tuning in the 30s? also for the "too much port area", that is just a fact. you can easily have too much port area. you get to a point that the subs just act as free air, it can also get extremely peaky b/c the tuning is so high.
  10. working in the industry and having some sort of association in the industry several years back, you have to actually understand and look at things from a production and physical stand point. let's just take a look at a small output 5 channel amp, say 50x4 @ 4 ohms and 200x1 @ 4 ohms. rough size of an amp like that back in the late 90s was relatively large b/c the parts that made it up were relatively large too. theses were assembly line produced with very little automation. so QC was constant as there were human eyes on almost every stage of production. now take a similar amp in today's time. it has a very small foot print in comparison to the 90s amps. very little of the assembly is done by human hands so QC will not be as prevalent. too add the components are significantly smaller and harder to see flaws. were products back in the late 90s great, hell yeah they were. Are products today built great, hell yeah they are. when people say "they just don't make 'em like they use to" for anything, that's based more on emotional association than on actual facts. if a product is so well built, then the company will continue to make it similarly with very little change.
  11. so you telling me you feel safe eating ass after she's ate Taco Bell? I feel safe getting my face stuffed in her tits at almost anytime of any day. she's got to shower to eat some ass unless she's like Alice Eve hot and Sheryl Sandberg money.
  12. prefer tits, b/c if she's actually trying to talk to you, you can still check out her tits. also if you get a nice set in your face, it's called a motor boat which are always fun. if you get an ass in your face it's called a stink face, we'll that's not fun plus you can get pink eye.
  13. mothra

    amp wiring question

    no problem.
  14. mothra

    Muting front stage

    set the HPF on the fronts to a really high frequency
  15. mothra

    Bracing More Important than Thickness?

    just from my perspective over the years I feel that one is not better than the other, it's all application dependent. I feel that one is not better than the other as long as the purpose is achieved. when I build for larger subs I want a good solid mounting baffle for the subs so I'll at least double baffle then use parallel wall bracing every X number of inches. when I build for smaller subs I'll usually use triangle bracing points and maybe a parallel wall bracing. for larger subs you'll have a longer baffle with very little continuous structure so I feel that you do need to add more structure from adding another layer but I also want to have something help support it so I'll add a parallel wall bracing.
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