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Brian Steele

So, I spend about 4 hours day before yesterday retuning my car, using my ECM8000 mike, my USB i/f, my laptop and TrueRTA. I must have experimented with every different x-over setting and every different EQ setting and a good set of TA setting as well. I finally settle on something I could live with ...

Brian Steele

welll my deck goes almost all the way up and i actually burnt the tweeters at abt 3/4 volume. I dont remember the brand on the tweeters but they are the small round ones i believe rated at about 100 watts max and i know they were kind of cheap. Hmm...post a picture. If they are what I think they ar...

Brian Steele

nello-sello , ok, so I will take some pics and maybe a vid once I get my camera back from the gf You can check them out here: http://www.bassworx.com/subs.html The one's I got are the BW10.3 T/S params look pretty decent. Whether or not the published specs match the actual ones is another issue. Oh...

Brian Steele

Nice review.

Good God - 58Lbs...

Brian Steele

Hey how do u install tweeters without them blowing when connected to an amplifier? I installed 2 small ones recently and they fried instantly wen i turned up the volume :D What size / type tweeter? You need to use a high-pass filter to protect the tweeter, but the specs of the filter will depend on...

Brian Steele

sundownz wrote:About 6" or so from the back.

Ok, that explains it. I thought it was a LOT closer

Brian Steele

sundownz wrote:We moved it around quite a bit and it stays within a few tenths.

Cool - how far was it actually from the rear of the vehicle when you took the measurement? Perhaps the photo is a little misleading...

Brian Steele

We plugged up one port hole in a box I had laying around the shop and dropped an NS 15 in there to see what would happen. Good times :) I think we've had too much fun this weekend. Very interesting results there. Looks like the vent exit is quite close to the rear of the car, and this might be load...

Brian Steele

slacker_jack , it's a new car from DM so it has the original Mitsubishi deck with 6 cd changer... bought a pair of MB Quart 2-way coaxials today (Formula FKA 116), just put them in. even with 150W peak power rating, they're distorting badly on max volume. original Mitsu speakers playin much better....

Brian Steele

smaharaj wrote:p3 1,other subs 0,

Hmm... RF P3 - isn't that the sub with a big cover concealing a tiny magnet...? I think a picture of one with the cover removed was posted to diymobileaudio some time ago.

Brian Steele

JL audio HD900/5 channel amp new $6000 Not a bad price... My dream system would be two of these, giving 8 channels for 3-way use with bridged output into the midbass speakers, and using the two sub channels to drive two subs. The lower output rating for 1.5-3 ohms is interesting though. sorry to sa...

Brian Steele

smaharaj wrote:no it dont,but d bac seat not there,so is not dat

A picture of your install might help...

Brian Steele

I can see Jeff and Nigel packing up to head over to Singapore now... :lol: and just incase anyone didn't realise, those amps are located in the front of the car! i.e. it has no rear trunk.. http://i948.photobucket.com/albums/ad324/teamshok/Ferrari/7.jpg If he could found a way to place the sub in t...

Brian Steele

http://i948.photobucket.com/albums/ad324/teamshok/Ferrari/11.jpg Whoa, is that an Earthquake 12" SWS I'm seeing there? How do those things perform? Ever measured its t/s specs? I'm curious to see if the measured specs matched the published ones, and if this driver can actually deliver as much ...

Brian Steele

X_Factor wrote:^ link eh working

...fixed, thanks

Brian Steele

Extracting the important specs from what you've posted: Alpine type r 12" Subwoofer, with crazy power, and the best sound quality Dual 2 Ohm Voice Coil Version Pioneer TS-W308D4 12" Subwoofer Impedance: Dual voice coil 4 ohms Xmax (millimeters) 9.4mm They're not directly comparable - one's a dual-2 ...

Brian Steele

If you want to try something completely different - http://www.parts-express.com/pe/showdetl.cfm?Partnumber=264-833. For car use, vented would work, though I'd be tempted to go EBS or even 6th order BP.

Brian Steele

has anyone done something like this before? either ported or sealed and i mean SUBwoofer not woofer especially Low q ones ive very interested in the output of these things if anyone has to demo let me know How much space do you have to work with? An 8" tapped-horn might be an interesting project to...

Brian Steele

so any 4 ohm resistor will work huh, no particular values and will this one still work as my sub is a 3 ohm sub. Any that can handle a reasonable amount of power should work. Remember, you are going to play the tones at LOW volume. Once the resistor is one of those that looks like it's housed in a ...

Brian Steele

carfreak1024 wrote:^^^^is using a 4ohm speaker the same as a resistor and if not where can i buy one. and what is the usual cost.

No, it's not the same.

If you've got an old x-over handy, you may be able to find one in the tweeter section. Otherwise check the nearest electronics repair shop.

Brian Steele

hmm but i am feeling like a rell ass now boi, because now i know my box not tuned to 21hz, but more like 33hz, yuh guys think it make sense to tune any lower than this like at my FS which is 29hz. maybe i can get more lows. LOL. I think you should be fine at that tuning. It will improve the power h...

Brian Steele

Ok my box wasn't built to specs and my audio system was, is tuned poorly but the question remains about the DC Voltage These are the voltages across the speaker terminals in my various amps PPI PC4100. 0.04V PPI DCX600.4. 0.05V Atomic 3000.1. 0.9V Is the dc voltage across the atomic amp enough to d...

Brian Steele

also in bassbox pro 6 when using multiple ports and they give you a port length are you supposed to divide that portlength among the 3 ports or make each port that lenght. i know its kinda off topic but this could help me fix some. You are supposed to use that port length for each port, not divide ...

Brian Steele

remember tline is an entirely different concept and the driver is what makes the box, incorrect selection will end up in wasted time very few people have mastered that design here in trinidad, but there's alot more to it than whats available on the net for reading, and it's going to take u a great ...

Brian Steele

I also ran the numbers through WinISD and it calculated that the optimal sealed enclosure size for this sub is 1.093 cubic feet and gave the optimal box size as follows: 13.95" wide 21.46" high 8.93" deep use this spec 1.1 cubs, stuffing is not necessary, maybe a piece behind the speaker in the enc...

Brian Steele

i have a few questions to the experts. 1) I had an install done PPI D2000/1 , Zeus 6410 , clarion eq746 some alphas for mids and alpine9886 re sx 12 inch. Give some more details about the subwoofer box: 1. Size (internal volume, not including vent (if any)) 2. External dimensions 3. Location in the...

Brian Steele

good point Brian i never thought of it from that perspective , but i read this article here a while back (no author credit given) and they seemed to attribute it to the wavelength ... good topic to research http://www.crutchfield.com/S-TsOnMxHtWA ... kb332.html That article more addresses the effec...

Brian Steele

http://www.glasswolf.net/papers/cabinvolume.html ...... :wink: As in the vast majority of case cases Vcabin>>>Vbox, that hypothesis is likely incorrect. However, it would be easy to confirm its validity by simply measuring the sub's impedance response with the windows down and up and comparing the ...

Brian Steele

what you are experiencing has to do with the wavelength of the sound being reflected in the vehicle Hmm... probably not. It's a curious effect, never the less. The best hypothesis I've seen for the effect of "more bass when the windows are down" (and in fact more bass when the doors are open too, L...

Brian Steele

New driver measured specs : Fs : 18.8 Hz Qms :6.26 Qes : 0.49 Qts : 0.457 I should clarify something here. I took those measurements after I did my usual "excursion testing" to see how much noise was generated by the motor, among other things. It's entirely possible that this constituted "break-in"...