I plan on adding a Passive Radiator

Mr. Sharpe

So I plan on adding either a pair of 5.25" passive radiators or one 8" passive radiator to my tower speakers I built. I'm not sure which I'd rather have. If I use the 2 smaller ones I'd put them on the front and they'd look good cosmetically and if I used an 8" it'd have to be on the opposite side from the active woofer which then it wouldn't be visible. the woofer that's in the cabinet already is on my signature thing. If this is a good idea then could you please maybe tell me which option would be better and if it's a bad idea and the woofer is good enough then say so:o

this will be for a 2 channel stereo setup FYI

Toolfan66

How come I get the feeling the number in your sig is SPAM? The one next to where it says peerless. If it is you put a lot of thought into this one.

None the less I will report it if I'm wrong then sobeit, and I will say I'm sorry. If I'm right then your not so sharp. LOL


Peace.

Mr. Sharpe

I have no clue how to post spam! here are the links to PARTSEXPRESS.COM from which I bought the 8" woofer and tweeter.

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=279-179

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-366

I just put too much thought into it.

Mr. Sharpe

this answer is also irrelevant, thanks.

Mr. Sharpe

and that wasn't funny.

Toolfan66

It just looked like spam like I said I would apologize. I'm not sure what would be best to work for you but I'm sure some of the DIYers will chime in.

Again sorry,

Peace.

Mr. Sharpe

ok. i Don't know what spam looks like so I guess I'm gonna take the model numbers off, all they do is take up room.

thanks.

Toolfan66

Mr. Sharpe wrote: »

ok. i Don't know what spam looks like so I guess I'm gonna take the model numbers off, all they do is take up room.

thanks.

I don't think you need to do that, just when I hit the number it was not going where I thought it would go so I clicked off it. Kinda like a phone number.

F1nut

You should study some books on speaker designs.

Mr. Sharpe

TOOLFORLIFEFAN wrote: »

I don't think you need to do that, just when I hit the number it was not going where I thought it would go so I clicked off it. Kinda like a phone number.

huh? you clicked the model number and it went somewhere?

Mr. Sharpe

F1nut wrote: »

You should study some books on speaker designs.

I lost my book:( I tried reading it a long time ago and it didn't make any sense... I may end up buying another one or something.

Face

http://techtalk.parts-express.com/forumdisplay.php?f=2

Mr. Sharpe

Face wrote: »

http://techtalk.parts-express.com/forumdisplay.php?f=2

much better answer than last.

Face

Don't do it.

F1nut

Mr. Sharpe wrote: »

much better answer than last.

I'm not sure why you would post such a stupid comment as both Face's suggestion and mine require YOU to read and learn.

Don't bother responding as you just joined my Bozo list.

Mr. Sharpe

I never said I may end up buying another one did I? oh darn, yes I did. it's not really that hard to give advice is it? well it is. oh well.

sawatzky

The problem with speaker design is that you can't just build a box, throw some speakers on it, and call it a speaker. Maybe that works for the garage, but unless you are extremely lucky they will not be audiophile quality Home Theater speakers.

You are on a quality Home Theater forum, so we can only assume that you want to build quality speakers. Once a box is designed with specific speakers as part of the equation... you cannot alter the speaker design. You can't throw passive radiators in a speaker box that was designed not to have them. You can't throw a port into a box and expect it to sound better. These features have to be included at design time.

For example, I wanted to build my own sub-woofer. I bought a sub speaker, and got someone to plug the numbers into the equation to find out how much volume I needed inside the box for the speaker I bought. The first question he asked me was "ported or non-ported?". That is the time to decide. You don't buy a speaker, and a box, then decide if you want to port it or not. The formula for a non-ported box then worked out to 4002 square inches. I built the box, and it sounded great. It would have been a different size if I said I wanted it to be ported. But now I can't port a 4002 sq inch box and expect it to work, and I can't add a passive radiator. everything would have to change.

I suspect that you are just hacking around with speakers and want to experiment with speakers and sound... and that's great. But you will not find serious help on a speaker forum if you ignore the laws of physics, and do stuff that everybody knows will not work.

wz2p7j

Mr. Sharpe wrote: »

So I plan on adding either a pair of 5.25" passive radiators or one 8" passive radiator to my tower speakers I built. I'm not sure which I'd rather have. If I use the 2 smaller ones I'd put them on the front and they'd look good cosmetically and if I used an 8" it'd have to be on the opposite side from the active woofer which then it wouldn't be visible. the woofer that's in the cabinet already is on my signature thing. If this is a good idea then could you please maybe tell me which option would be better and if it's a bad idea and the woofer is good enough then say so:o

this will be for a 2 channel stereo setup FYI

Good advice so far? First guy accuses you of spam. The second guy tells you to read a book. The third guy tells you your project won't work. Betcha glad you joined the forum, eh?? Welcome to Club Polk. :p

Chris

Mr. Sharpe

@sawatzky: thank you so much sir, I was happy reading your post. I pretty was hacking around with speakers for a while, I basically stuck the Radioshacks in a box that was pretty big with a tweeter and they did sound really good! then I decided to add an 8" woofer onto the side and that really extended the bass and they still sounded really good:) the other day I just got done sticking some 10" passive radiators on the side of them and they sounded even better, but the roll off is extremely steep, nothing below 30hz at all. I haven't got a chance to try 30hz-40hz, but 40 is very strong and they were driven by an adcom gfa 1a too so I'm sure that helped. I've joined partsexpress techtalk a while back and they've already helped on my redesign too which I've been planning since. I'm ordering my 12" passive and new mids tonight! I made sure that the cabinet size (same as Polk RTA 12C) would be good and they said it'd be perfect with the 12" radiator and the woofer. I do thank you for your time sir.

@wz2p7j: I actually am glad I joined the forum, although I wasn't the night I did because I got all that right after I posted this thread lol. but I love Polk Audio speakers, I am inheriting my dad's rta's and his adcom stuff, and NAD cd player;) I do appreciate all positive feedback more than you know and I truly am thankful!!