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Everything posted by STEvil

  1. Only thing i'd worry about is corrosion or vibration of the mounting panel, but really nice idea. I want a bunch so I can do up all our PA gear we have lol!
  2. Tuning to Fs requires a few other motor parameters to be met if you are tuning to a higher Fs than 35 and wish to still perform down to 30hz, in my opinion. I would rather just tune to 30hz and not worry about it not working in the specific environment its going in.
  3. They don't really lend themselves to that, maybe for dynamic power mode. You can't make power, only transform it, max RMS power will still be the same. This tech needs normal music (high crest factor) to shine. Yeah, thats why I suggested slaving to older 25x4 ish amps. Even off a HU if the RF amp has an internal crossover that sucks up the power that would have been wasted below ~120hz it might be making dynamic power more often.
  4. he could ship an oversized cut-out wit them to use as a guide to router the hole with, but drilling a couple corner holes and cutting between them isnt that hard...
  5. Awesome product steve, you're turning into a mad man with that CNC lol. Be careful, you'll be getting a new one with another axis on it if you keep this up lol
  6. So... would it work better if we put them on an old 25x4 amp to get a "100x4" amp... or maybe a pair per channel for a 100x8 amp? lol. Neat trick, good idea on RF's part!
  7. bike stolen in ...... Good project and good on you for doing it steve. Maybe a "stealth" system might be a better idea next time though? Could build a helmet with speakers and a sub on it (i'm already doing that actually lol, using 4 aura 3" drivers and digging around for the sub yet) or... I dunno.
  8. Use shims to lift the sub or make the mounting point deeper by design. It wont hurt anything tuning wise.
  9. thats the basic line which is ok to build and test with. You dont have to tune to Fs (in fact I never do).
  10. Over excursion and uneven loading due to port on one side. Turn up the low pass filter so you dont go below tuning so far or get surrounds that wont run out of travel.
  11. This infers one plays louder than the other, and that there is a specific reason (or reasons) why. I listed a few reasons why either may be the louder setup and Tony gave a reason as well and inferred that the topic needs further research as it is not a "simple" answer.. like number of subs or non-reactive impedance. The answer to the question is that it will depend on a list of real world factors that need to be tested and known and listed in the question if you're looking for a specific defined point and looking to maintain order. It could even be something like coil weight, field, or magnetic permeability being influenced from number of turns due to the different impedance each setup is attempting to run, or even that the coil is being influenced far futher than we think due to the nature of running a parallel or series (as mentioned in the youtube video). I think this belongs in the "fact and science have no place in car audio" thread to tell you the truth. I dont recall anyone saying anything about researching the topic further (here or other places, its not actually a new topic though it is not a popular one to discuss with intent to get anywhere for some reason) and I surely dont have the time or resources to.
  12. That wasnt what you originally asked, you inferred one is louder and asked why.
  13. ya... i dont get that..... Do you think dinosaurs are a creation of science as well? :I
  14. Possible causes of difference in loudness: - One amp can only produce 1k for burst periods - Distortion - Damping factor - Amplifier topology (A/B, D, G) - Coil and motor will react differently to different voltages - Back-EMF of driven circuit (coil configuration) - ESR (as a product of coil configuration or of amplifier based on driven frequency of supply fets and/or ouput)
  15. Here, Kyblack - http://en.wikipedia.org/wiki/Series_and_parallel_circuits specifically, voltage is constant across parallel loads, and divided by each load in a series load. Higher voltage means you can increase current flow which means more power. If voltage remains the same or is lessened then you lose current capacity.
  16. yes it does Let me expand on this. While it series parallel doesnt effect the output of the amplifier, since the amplifier produces wattage based on the load presented, the woofers due to teh way they are wired will process the wattage diffrently Which is why my statement didnt end with the comma.
  17. So much misinformation in this thread... ouch. Rise will not be consistent. It is dependent on factors not limited to the enclosure, damping factor for example (http://en.wikipedia.org/wiki/Damping_factor). Two amps which produce 1000w at different impedance will not necessarily produce the same decibel output. See damping factor again, lol. Wiring series-parallel/parallel-parallel makes no difference, voice coils should be calculated after the amplifier performance to find your optimal coil configuration for the amplifier.
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