Topic: Speaker DIY'ers

[Gino]

From the HT or car amp, pareho lang ac signal iyan. No converters. What you need to check is matching impedance of speakers to amp. Also look into power handling of the amp kung kaya speakers mo. Looks lilke you need a dedicated power amp for those. Pilyo? But you need a receiver to lowpass the rca.

[totnakz_007]

@Gino tjanks sir for the inputs... basa basa pa din po ako sa net....

[Gino]

Importante sa DIY is you love making it. You know what you want. You know what you are doing.

Hindi pagtitipid ang motivation ng DIY. The R&D and revisions are actually expensive. Put your labor, transpo, and materials together and mas mura pang bumili ng proven retail active subwoofer.

[tony]

Hindi pagtitipid ang motivation ng DIY.

agreed....actually mas mura yung commercial units even if the tag price appears higher...

[totnakz_007]

Yes mga bossing MDF pa lang po wagi na presho.... 

[JojoD818]

You know what you are doing.

Sadly, not all speaker builders do.

I'll be honest, during elementary I salvaged every speaker I can find and put them in a box and powered it with my walkman frying the poor thing.

I lost a week's allowance as punishment for salvaging speakers from working radios in the house.

[John E.]

Sadly, not all speaker builders do.

I'll be honest, during elementary I salvaged every speaker I can find and put them in a box and powered it with my walkman frying the poor thing.

I lost a week's allowance as punishment for salvaging speakers from working radios in the house.

hehehe ganyan din ako nung elementary master jojo! aiwa naman yung portable/walkman ko!

[Gino]

Ha ha ha. I can relate. Anything that could be opened with a screwdriver, was opened. The creations worthless. The thrill was priceless.

[JojoD818]

hehehe ganyan din ako nung elementary master jojo! aiwa naman yung portable/walkman ko!

hay salamat, akala ko weird ang pagkabata ko eh.

the worst thing (and relative punishment) I did was dismantle the disc mechanism from the back of talking dolls in the hopes of making my very own battery operated TT.




diyan ako nayare ng husto tsk tsk tsk... 

[JojoD818]

Ha ha ha. I can relate. Anything that could be opened with a screwdriver, was opened. The creations worthless. The thrill was priceless.

Kaya siguro yun SAE receiver ng daddy ko under lock and key... tuwang tuwa pa naman ako dun ang daming pindutan!

[Gino]

Ha ha ha. A very wise move by your daddy.

[JojoD818]

Ha ha ha. A very wise move by your daddy.

Actually it was him who made the subscription to Electronics Enthusiast magazine and pointed me to Alemar's (that's like a National Bookstore for those not in the know) and buy this cheap book about loudspeakers. Dami ko natutunan dun sa book na yun, puro kalyo daliri ko sa pag wind ng coil para sa dividing network.

He had an electrician install a separate electrical line to my room with it's own fuse (wala pa breakers noon ) and at about grade 5 got my very first fire extinguisher as a birthday gift hahaha.

Speaker building was fun and tedious back in those days, wala pa power tools but mura pa mga drivers na magaganda.

[Gino]

Alemars, ha ha. Throwback ah. Alala ko iyan. Tuwing last weekend of summer depressed ako pagshopping ng school gear sa Alemars ha ha. Sa Cubao ata yung amin. Tapos bili sapatos sa Greg's sa Horseshoe Village.

[JojoD818]

Alemars, ha ha. Throwback ah. Alala ko iyan. Tuwing last weekend of summer depressed ako pagshopping ng school gear sa Alemars ha ha. Sa Cubao ata yung amin. Tapos bili sapatos sa Greg's sa Horseshoe Village.

Langya throwback Thrusday nga pala ngayon!

[Ilovemusic]

Oh my! Just the right thread for me. Guys may problema ako. Im planning my first build and in the planning stages I am taken aback by one particular issue that is pretty much a dilemna.

I have a pair of tweeters, one of which sounds dull and the other one sounds bright(er). How would you know who is sounding properly? There is a treble peak at around 8khz on one of the tweeters. I guess my question is, is it possible for a bad tweeter to be more 'sibilant' or by default do bad tweeters go dull sounding?

[markcrenz]

Oh my! Just the right thread for me. Guys may problema ako. Im planning my first build and in the planning stages I am taken aback by one particular issue that is pretty much a dilemna.

I have a pair of tweeters, one of which sounds dull and the other one sounds bright(er). How would you know who is sounding properly? There is a treble peak at around 8khz on one of the tweeters. I guess my question is, is it possible for a bad tweeter to be more 'sibilant' or by default do bad tweeters go dull sounding?

Whatever the answer is, there is nothing you can do to make them sound the same again. And if ever you determine which is bad and somehow manage to make it sound like the other one, you probably wouldn't want to use a pair of dull tweeters or a pair that rings at 8khz.

Simplify things by replacing the tweeter with a different pair.

[Ilovemusic]

yep! thing is im trying to get an answer for educational purposes. you know, to make sense of it all? your answer makes full sense in a DIY kind of way, so you are in context being this is a DIY thread. im just really curious, i guess.

of course, i ended up getting a new pair of tweeters. hopefully i can amass the effort to start the cabinet build.

the question stands. do some tweeters go brighter when they go bad?

[Gino]

If it doesn't sound good, it has gone bad. I don't really see the point of your inquiry.

[tony]

yep! thing is im trying to get an answer for educational purposes. you know, to make sense of it all? your answer makes full sense in a DIY kind of way, so you are in context being this is a DIY thread. im just really curious, i guess.

of course, i ended up getting a new pair of tweeters. hopefully i can amass the effort to start the cabinet build.

the question stands. do some tweeters go brighter when they go bad?

dun sa tabi ng pasig city hall merong speaker repair shop, you can hove your tweeters checked there...

[Ilovemusic]

If it doesn't sound good, it has gone bad. I don't really see the point of your inquiry.

this is like saying f*ck education.

im sorry if you dont understand the question. simple lang yung tanong.

posible bang may mga tweeter na pag nasira/degrade eh nagiging bright ang tunog? the more i look at the answers the more i am thinking na mali ako ng pinagtanungan. anyway forget it. i rest my case.

Addendum: On a humbler note, i guess there's just no specific answer for this. its a case to case basis, therefore might be a unique issue. Perhaps too insignificant to be considered a topic.

[tony]

if you say naging bright ang tunog, then who am i to doubt you?
it is just that our experience is different from yours, yon lang yon...
anong tweeters ba yan?

[markcrenz]

the question stands. do some tweeters go brighter when they go bad?

they often don't. during overloads those with plastic domes may either burn slightly and stiffen decreasing its sensitivity, or simply burn up and die. cone tweeters may also stiffen over time and again lose sensitivity. most tweeter failures are open circuits.

[JojoD818]

Oh my! Just the right thread for me. Guys may problema ako. Im planning my first build and in the planning stages I am taken aback by one particular issue that is pretty much a dilemna.

I have a pair of tweeters, one of which sounds dull and the other one sounds bright(er). How would you know who is sounding properly? There is a treble peak at around 8khz on one of the tweeters. I guess my question is, is it possible for a bad tweeter to be more 'sibilant' or by default do bad tweeters go dull sounding?

Have you checked the caps on the crossover? You may want to switch the two tweeters and deduce the answer from there.

[remington]

horn tweeter... raw finish...5.5"x11"x8" using vifa xt25sc90-04

[JojoD818]

nice, very nice...

[remington]

nice, very nice...

thanks sir!!!

[JojoD818]

thanks sir!!!

What are your plans for finishing?

[camoteque]

horn tweeter... raw finish...5.5"x11"x8" using vifa xt25sc90-04

First time I've seen a design like this. What are you trying to achieve with placing your tweeter in a horn like this? Nice woodwork, btw.

[tony]

sabi ko na nga ba.....Larry will chime in....

caotecue, kailangan bang my throat yung horn?

madali namang lagyan yan kung sakali....

[camoteque]

I'm no expert but I just noticed two unconventional things being done here. But maybe remington has special considerations here. One is, as Tony had noticed, is the absence of a throat (or is that the throat immediately after the tweeter) so no smooth transition here from tweeter to the horn itself. I doubt if there will be efficiency gained here without proper horn expansion. Two, I don't know why the stepped expansion. Maybe part of the design. But the stepped expansion will create distortion for the tweeter rather than reduce it. Sound will bounce at the insides of the horn and may cause delays. Btw, what is the frequency cut-off of this horn? Have you compared the tweeter's performance with/without the horn?