The Boominator - another stab at the ultimate party machine

[whelibob]

Originally posted by Saturnus


Yup.

Allright. Do your Zomax HP100 piezos "rattle" like explained here when playing as loud as possible on your ghettoblaster? Since mine do and i find it disturbing. Otherwise the sound of the tweeters has become better or i've gotten used to their crappy sound.

[Saturnus]

Originally posted by whelibob

Allright. Do your Zomax HP100 piezos "rattle" like explained here when playing as loud as possible on your ghettoblaster? Since mine do and i find it disturbing. Otherwise the sound of the tweeters has become better or i've gotten used to their crappy sound.

Piezo need at least 24 hour, and even better 100 hours, before their sound settles in so they've probably gotten a lot better.

Anyways, I always dampen the plastic housing with blue tac, so I don't experience any problems. I also screw the piezo element of the horn, and glue it back on.

[whelibob]

Originally posted by Saturnus


Piezo need at least 24 hour, and even better 100 hours, before their sound settles in so they've probably gotten a lot better.

Anyways, I always dampen the plastic housing with blue tac, so I don't experience any problems. I also screw the piezo element of the horn, and glue it back on.

Yeah i tried also to dampen the piezo with blue tac but didn't help.
Is there any other good piezos then motorolas original piezos and zomax hp100? since zomax hp100 piezos would cost me 468 DKK(62euros) due shipping costs and its a bit too much for two piezos. Maybe ill send you money saturnus and you send them to me with cheaper shipping costs :P

[whelibob]

What would be a good value for a resistor for this piezo:
http://www.adelcom.net/MOTOROLA_ksn1005b.htm
3.5khz would be the crossover frequency.
Supposed to be a good piezo, just ordered two of them.
Tried to count piezo value myself, but i came out with crazy numbers.
Thanks alot in advance!

[Saturnus]

Originally posted by whelibob
What would be a good value for a resistor for this piezo:
http://www.adelcom.net/MOTOROLA_ksn1005b.htm
3.5khz would be the crossover frequency.

Thanks alot in advance!

"Appears as a 0.13 uF capacitor."

If that's correct then it's a 350 Ohms resistor from:

R=1//(2*Pi*C*f)

[whelibob]

Originally posted by Saturnus


"Appears as a 0.13 uF capacitor."

If that's correct then it's a 350 Ohms resistor from:

R=1//(2*Pi*C*f)

Allright thanks. When buying new resistors, does it matter what Watt value it has? My electronic shop has only 1W and 2W versions with several ohm values.

[Saturnus]

Originally posted by whelibob

Allright thanks. When buying new resistors, does it matter what Watt value it has? My electronic shop has only 1W and 2W versions with several ohm values.

2 watts is more than enough for your purpose.

[Der Alte]

Wow guys! You have done totally amazing and boomblasting audio systems! Cheers for that. I'm also considering what kind of boomblaster I'm going to do. The Boominator is awesome but it's propably a little bit too much for me.

Is there any sense to use car speakers for this project? I'm thinking about Blaupunkt GTx 803 -speakers but I can't find any Thiele/Small parameters for these. What kind of enclosure is suitable for these speakers is total mystery for me... Anyhow using these speakers it would be pretty easy to make my own version of DIY blaster.

Do you second this idea or should I consider again?

[Saturnus]

Originally posted by Der Alte
Wow guys! You have done totally amazing and boomblasting audio systems! Cheers for that. I'm also considering what kind of boomblaster I'm going to do. The Boominator is awesome but it's propably a little bit too much for me.

Is there any sense to use car speakers for this project? I'm thinking about Blaupunkt GTx 803 -speakers but I can't find any Thiele/Small parameters for these. What kind of enclosure is suitable for these speakers is total mystery for me... Anyhow using these speakers it would be pretty easy to make my own version of DIY blaster.

Do you second this idea or should I consider again?

Thanks

Depends. It won't play very loud with those. 89 dB/W/m in 4 Ohms is very very low. You need a hundred or several hundred watt amp to make it play as loud as the Boominator and that would require a battery pack the size of a car.

However, it might be loud enough for your purposes.

[Der Alte]

Oh, I didn't notice that sensitivity is so low in these Blaupunkt's. More suitable and propably better option will be either DLS Coaxial Series 428 or DLS Performance series 126. But again, I can't find any info what kind of enclosure is suitable for these speakers, douh!!!

What I'm looking for is an allrounder boombox that beats for example the JVC's boomblaster. After all it is possible that the boominator is the one and only -concept that I'm going to build eventhough it is a little bit to extreme for me.