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Now I know this has a lot to do with individual preference so this will be very subjective. I was thinking today about where cassette tapes rank as far as audio mediums. I have never seen a real list broken down anywhere, just someone saying "Vinyl is better than CD's" or something of that nature. Let me know if I forgot anything, but this is what I could remember off of the top of my head (not in order obviously). How would most "audiophiles" arrange these from best sounding to worst? DVD-A/SACD (possibly separate?) Cassette Tape Vinyl Digital Storage (Flash/Hard Drive) 8-Track Reel Tape CD

I'm confused as to how a subwoofer can have a Resonant Frequency of say 18 hz, but a frequency response that only goes down to 25 hz. If the sub only responds to 25 hz, how can you know the fs is lower than that. The new Soundstream T5's are an example of this. I just don't understand. -C

Hey everyone, I posted a thread a while ago about trying to work out the ports for an enclosure for my sub. I've spent alot of time deciding whether or not to go with a ported or sealed enclosure. I've decided to go for a sealed enclosure instead. I've been using Bass Box Pro to try and design an enclosure and I'm getting a bit frustrated Here are the specs of the sub: 15” Electrical Q Value -Qes: 0.58 Mechanical Q Value -Qms: 3.62 Total Speaker Q Value -Qts: 0.501 Free Air Resonance -Fs: 19.10 Hz Equivalent Compliance -Vas: 207.0 liters One-Way, Linear Excursion -Xmax: 54 mm Efficiency -SPL 1W/1m: 85.81 dB SPL Effective Piston Area -Sd: 810 cm^2 DC Resistance -Re: 4.2 o…

i have a 1997 mercury mountaineer (ford explorer). does anyone know what the resonant frequency is of my truck. when i find the resonant frequency what will that acomplish? do i need to catch my 1/4 wave at the dash at the frequency? im not quite catching this theory.thanks for any and all help

this might be on another thread, someone direct me if it is please. im very interested in building a t line for a 12 i will be getting. what are the pros and cons of a t line and how do you figure out exactly how to build it for a specific subwoofer. thank you

I have been building boxes for sometime and I notice that a lot of boxes have the same concept but are built a little different. When I build a ported box for two subs I normally direct the air out of the front (depending on the application) of the enclosure with a divider between both chambers. I have seen some enclosures with no divider coming out of the front, just a big hole. Does adding or taking away a divider give off a different sound? I also add one in the middle just to make the box more rigid. I am building two ported boxes for a van. Would it be better to port it in the front like I have been doing or to go another way. I would think that by porting it out the…

Okay, now everything has a resonant frequency. At this point, the most energy will be on the object correct? If this is the case, wouldn't it be wise to find the resonant freqency of a particular meter in your intended application and mounting location, measure it, and then design for your peak to be at that point? Wouldn't that produce the highest reading? I'm sure this has been thought of, but I'd like some input. Sean, Neil. . .

Im trying to get the TEST SPL tuning for a box in a 01 Grand Am, 2 door. The box is going to be 4 cu ft for a SSA Icon . I'm trying to design a SPL box for a competition coming up on July 8th so any info anyone can help me with would be awesome. I was told that the best SPL tuning would be 5 hz below the resonance frequency of the vehicle, not sure how to spell resonance, but hopefully nooe gets too confused. Thanks Dustin

What exactly is the F3 of a speaker, and what should that number be relative to a ported box's tuning frequency, if at all? -C

Just curious why no speaker manufacturer uses dual tweeter setups? I see multiple mids on a single speaker all the time, but I have never seen dual tweeters on a single speaker. What would be the cons and pros of using two tweeters per speaker (four total for stereo)?

if i build a box for a lower tunning, will the music not sound as good as a higher tuned box, or will it just sound better on low frequencies? Thanks Dustin

I am looking for some rough plans on how to make a ported pacman box for 4 15" subs. Anyone with any links or resources would be great.

Ok, I got this idea from looking at Decware's planar speaker design they have up, LINK and was wondering if this could be scaled up for a home subwoofer type setup. My thinking was with the large radiation area could make up for using a smaller driver due to the fact that the displacement of the airmovement is going to be pretty dang big. What I am wondering is if anyone knows of anything like this that has been done before. I think if it could be pulled off with reasonable degree of sucess it would look really cool with maggies, plus I think it'd be a challenge o build something like this too. Does anyone have an idea as to what size of panel area I would need for …

Does anybody have any good suggestions on Car Audio Books. More advanced stuff.

found this article via CYV forums!

Hey everyone, I'm having issues designing an all purpose (SQ while being loud) ported enclosure for my RE '06 XXX15 sub. I had a ported enclosure built. Its approx. 3.5ft^3. It has a rectangular L port with a port area of 60in^2. At the time when I designed the enclosure, I hadn't discovered WinISD or any other similar programs and just used the RE L Port calculator. This enclosure was supposed to be tuned to 35Hz. In short, its a mess. There is alot of port noise and it barely reporoduces anything under 35Hz. So I went back to the drawing board and learnt how to use WinISD. From what the program is telling me, it can't be tuned to 33Hz (which I want to achieve) unless th…

Ok I was watching Mythbusters last night and they were making a wind tunnel. They used a "honey cone"effect by using straws to help the air transition to the tunnel from the fan (or blower) better. I was wondering if this could be put to use in the car audo world??? Make a regular slot port and fill it with straw (like) tubes to the proper length. Very little surface area per straw and lots of straws. I was just wondering about that last night and figured I'd see if anyone here has ever tried or thought about it??? Your incite is appreciated... Jon

To raise it from 1ohm to 2ohm final load?

I need subwoofer box building software......I wanna start designs for my 2 15's NOW!!!1 Anyone got any help?? FREE is really helpful!!!! J

I was just thinking of this the other day and my general knowledge of physics dosnt lead me anywhere. Extreme DB levels seem to be in the mid 170's and slowly getting a little bit higher. Would it be phyically or humanly possible to make a subwoofer that moves air fast enough to create a sonic boom? It just moves faster and faster until the air it is displacing breaks the sound barrier! In which case I think that would be able to be higher than 170's, though im still not sure. What do you guys know about something like this? Im sure there is some sort of law of physics that would completely disregard this theory.

Ok I've been trying to do a lot of reading about the more technical side of audio. I was thinking about different styles of port and how they effect the output of the box. So on to my main question. What if you had a circular port that started off small and grew into a larger diameter. Say it begins as a 3" port and ends up say a 10" port (pulling numbers out of my butt) What advantages or disadvantages would this have?? If you think about it wouldn't it make it louder?? When you helling into a cone your louder, or when you cup your hands around you mouth your voice is louder then without. Wouldn't the same apply for car audio applications??? Any informative incite would …

Hoping someone like Scott @ Fi or some of the other manufacturers/designers on this forum will chime in here. When designing a driver how are small signal parameters and large signal peformance considered or correlated throughout the design and testing phase of the product? For example; Are the target (small signal) T/S parameters and design analyized via computer program and then large signal performance tested simply by "playing" with and testing the physical driver? Or are the large and small signal performance predicted via computer and then the physical driver tested? Do you have any sort of target large parameter shift when designing a driver compared to the sma…

I was thinking about speaker and amplifier resistence with all these RMS threads and Iron laws going around........I remember once checking the ohms of my driver which was a dual 2 ohm driver.......it was 2.12 ohm in the box and 1.97 out of the box...........when the sub was hooked up to the amp (amp shut off and no music) the resistence was like 2.75 or 3 ohms............why would this be? J

Thought maybe someone could take this one and explain why use a certain coil over another. Which material and what size fit what needs the best. etc.

Well since ascendant has slashed the price on the Assasin more than likely assasins will be in my GF's moms truck and my GF's car. For my GF's car if a wicked one just wont work the way i want it to this is my idea...Transmisison line in a false floor. I have a few questions though, Would it be a good idea to put the speakers (probably two assasin 10's) 1/3 down the line to eliminate harmonics from the transmission line? Ive read death stories about improperly designed transmission lines ending up sounding more like organs than SQ enclsoures because of harmonics . Also, Does anyone know of a formula for how much X ammount of stuffing will dampen the sound of speed X a…