-
Posts
2279 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Media Demo
Store
Collections
Videos
Everything posted by STEvil
-
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.
-
Dc audio level 3 10 huge hole in surround
STEvil replied to disprovable's topic in DC Sound Lab - Big Bass on ANOTHER LEVEL!
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. -
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.
-
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)
-
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.
-
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.
-
The only problem with that is the inductance of the voice coil. Voice coils present a reactive load to the output of an audio amplifier. This is actually the premise of the design of the AudioGraph Power Cube, which is an instrumental tool in the design of an amplifier. There really just isn't any way that one can "clamp" and get meaningful results. Again, this "baseline" was established incorrectly. There's just no way around this. The car audio industry is currently inundated with non-truths. Isn't it about time that we gather a collective that will challenge these fallacies with fact? It would be interesting to take a voice coil and put it in a bucket of water (no motor or anything else) to keep it from cooking then test the inductance. On note of earlier topic about capacitors, yes the dynamic nature of music means changes in milliseconds, but the peaks of sine waves only take milliseconds to happen. So if you get 3400w dymanic out of a 3000w amp then you might only get 3400w for the first two cycles of the sine wave producing the sound, which means if you have 5 seconds of 35hz in a song all at once you're not getting peak reliable power which could make or break your bass race score (well not really but we're trying to be accurate about true potentials of the power circuit, right?).. so testing what size of battery bank it would take to "keep" producing full power vs the dynamic capability of the cap, and what adding the cap does when you reach that peak battery bank supply ability.
-
Car drives through crowd of protesters - oh the irony
STEvil replied to meade916's topic in Vehicles In Motion
So.. any bets on how long until someone makes a carmageddon protesters mod? -
That was due to emissivity, not dissipation. His intercooler is mounted out in the open which means it would increase heatload from sunlight. edit Should have read page 2 before trying to nuke you I guess. EDIT 2 Steve, maybe put a sock over the filter to reduce dust/sand building up in the element?