Pwk???!!!???

[rival904 10+ year member]

Well what I said applies to both design and building. It's not too hard to design boxes. I actually find it fun. I created my own excel sheet with formulas to take all my dimensions, wood thickness, sub displacement, etc. If you can do basic algebra, you can design a box. Idk how to design 4th or 6th order bandpass boxes, but I'm working on it. Ah, good times.
//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

I agree, simple ported boxes are easy. Can you veiw collision charts at the headrest? Can you make the box work the best where your cabin sucks the worst?

Alot of the stuff he does, no one else has access or know how to do.

 

[PV Audio 5,000+ posts]

I agree, simple ported boxes are easy. Can you veiw collision charts at the headrest? Can you make the box work the best where your cabin sucks the worst?
Alot of the stuff he does, no one else has access or know how to do.

Again, that's wonderful and everything, but for 99.5% of people, it isn't necessary for what they want. It's like buying a new car with all the options that it has. Do those options make the car so much better that if you didn't have them you wouldn't buy it? For most people, no. It's just nice to say that you have air conditioned seats and triaxial headrest restraints.

 

[galacticmonkey 5,000+ posts]

Meh. Nowhere near $50 when someone on here will design you one just as good for free.

Ive heard quite a few of his designs and none were very impressive, most didnt even really work too well.

 

[rival904 10+ year member]

If your talking about having him build the boxes, then I agree, the prices for building the boxes are outragous, for the bluerpints, I think the $50 bucks is more than fair. He is currently working on a blueprint for me, 6 HCCA 15s in a blowthrough using the back window instead of cutting the truck up.

For a large build like that, Ill spend the 50 bucks, and know itll work the 1st time around. On a build of that size, I risk about 300 bucks in wood, countless hours of labor, fiberglass resin and matt, etc etc

 

[edzy 10+ year member]

Meh. Nowhere near $50 when someone on here will design you one just as good for free.
Ive heard quite a few of his designs and none were very impressive, most didnt even really work too well.

Ive heard about someone paying for a custom box for a specific car, but the plan was a generic one that was sold to a few as "custom" just for thier car.

IDK, maybe they all had the same car type or acoustic simalarities.

Ive also heard he got "lucky" with a few boxes and made a name for himself, but for the most part are just a quality built box, nothing magic.

He does do nice work, and probably puts more into it then some other box builders...but $50 clams is kinda high for plans imo, unless it was some crazy angled tline loaded monster.

 

[rival904 10+ year member]

Yea, if the enclosure was in a diff car and diff subs than what was plotted for, then all bets are off IMO.

Thats like buying a lambo and putting honda civic tires on it and saying it doesnt handle well

 

[soundstreamer 10+ year member]

A local car audio shop has one of his designs (a small transmission line designed for DD 1508s I think) they are currently using to demo 2x Rockford Fosgate P1 8" subs. They have it in the back of a CRX at the shop and it sounds awesome for a couple of the lowest line subs they carry.

It only hits 138.x on the TL...in a CRX

 

[S.B.C. 10+ year member]

If its for a reg ported box - no $50 isnt worth it

for a 4th or 6th order- then yea

 

[galacticmonkey 5,000+ posts]

But who says its a sure thing? Only one the boxes I have heard of his was decent. All others werent loud.

 

[JimJ 5,000+ posts]

If you want to see the Mecca of speaker construction, head over to DIYaudio.com. Some of the things people can do with wood are simply unbelievable until you see it for yourself.

And the DIY guys don't charge $50 for designs //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

While the guy has a right to charge whatever he wants for his time, it's nothing someone with a little determination to read and build can't learn.

Alot of the stuff he does, no one else has access or know how to do.

Like what? The list of what hasn't been tried in acoustics is extremely short - people were trying backloaded horns in the 1920s //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Like I said, I have no problem with someone charging for designs, but when the claims of totally brand-new ideas start coming up, it gets iffy...

 

[T3mpest 10+ year member]

And the DIY guys don't charge $50 for designs //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
While the guy has a right to charge whatever he wants for his time, it's nothing someone with a little determination to read and build can't learn.

Like what? The list of what hasn't been tried in acoustics is extremely short - people were trying backloaded horns in the 1920s //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Like I said, I have no problem with someone charging for designs, but when the claims of totally brand-new ideas start coming up, it gets iffy...

Exactly. Getting a decent mic and measuring your transfer function isn't hard or terribly expensive if that's where his extra charge comes from.

 

[TnT_Sounds 10+ year member]

All 6 of my previous ones were plain loud. I don't care for SQ, as I find it odd for someone to want prestine SQ while being as loud to the ear as possible. But nonetheless it was worth it for me.

My current one I'm working on is a 4th order wall and there's no second guessing it won't do everything I want it to. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[PV Audio 5,000+ posts]

If your talking about having him build the boxes, then I agree, the prices for building the boxes are outragous, for the bluerpints, I think the $50 bucks is more than fair. He is currently working on a blueprint for me, 6 HCCA 15s in a blowthrough using the back window instead of cutting the truck up.
For a large build like that, Ill spend the 50 bucks, and know itll work the 1st time around. On a build of that size, I risk about 300 bucks in wood, countless hours of labor, fiberglass resin and matt, etc etc

That was the one exception I mentioned. When you have something completely custom to the point that if it goes wrong, you'll be ****ed, then spending more than a fiver is a good idea.

And the DIY guys don't charge $50 for designs //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
While the guy has a right to charge whatever he wants for his time, it's nothing someone with a little determination to read and build can't learn.

Like what? The list of what hasn't been tried in acoustics is extremely short - people were trying backloaded horns in the 1920s //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Like I said, I have no problem with someone charging for designs, but when the claims of totally brand-new ideas start coming up, it gets iffy...

Again as I said, unless he's inventing new physics, I cannot see how his prices are worth it especially when he spouts jargon:

Advanced time / frequency domain modeling techniques developed at PWK Designs are used to perform in-depth analysis of the listening environment. By modeling the internal geometry of the listener's room (or vehicle cabin,) establishing precise speaker placement, direction, and a target listening point, these analysis offer precision beyond any commonly-available design suite.
The end result is an alignment in every way custom-tailored to the listener's needs, accurately aligned to a desired response along the target listening point, peak transfer of acoustic energy, as well as optimized piston control derived by fine-tuning the system acoustic and resonant impedance to the listener's target input power.

Shit like this really bugs me because I know most people going to his website haven't the faintest idea what time and frequency domain analysis is or that peak transfer of acoustic energy with optimized piston control simply mean good linear output //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

If he's using anything other than LEAP5, which is the single greatest speaker enclosure design suite ever created by man, then he really has no business talking about "modeling the environment's internal geometry".

Exactly. Getting a decent mic and measuring your transfer function isn't hard or terribly expensive if that's where his extra charge comes from.

Or just be like me and borrow one of your school's spectrum analyzers and oscilloscopes whenever you need to test your circuit //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[rival904 10+ year member]

That was the one exception I mentioned. When you have something completely custom to the point that if it goes wrong, you'll be ****ed, then spending more than a fiver is a good idea.

Again as I said, unless he's inventing new physics, I cannot see how his prices are worth it especially when he spouts jargon:

Shit like this really bugs me because I know most people going to his website haven't the faintest idea what time and frequency domain analysis is or that peak transfer of acoustic energy with optimized piston control simply mean good linear output //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

If he's using anything other than LEAP5, which is the single greatest speaker enclosure design suite ever created by man, then he really has no business talking about "modeling the environment's internal geometry".

Or just be like me and borrow one of your school's spectrum analyzers and oscilloscopes whenever you need to test your circuit //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

He did say LEAP was a great program, but not something that he uses.

Alot of the software he uses was developed by him.

 

[PV Audio 5,000+ posts]

I'm sorry, but LEAP is the best enclosure design software on the market. Period. There is a reason why in any paper or text on enclosure or speaker design that all plots are always on LEAP 4 or 5.