Author Topic: Speaker DIY'ers (Read 307315 times)

Handyman · « **on:** May 29, 2004 at 11:22 AM »

Those who want to share..Post your DIY speakers here...

rmpmla · « **Reply #1 on:** May 29, 2004 at 07:38 PM »

have posted this in the Gain Clone Amp thread.

here's my DIY 15" powered sub using a bridge +parallell gainclone amp

isang pares itong 15" sub, kaya meron pang susunod na post

homer · « **Reply #2 on:** May 30, 2004 at 11:01 AM »

pwede ba kahit luma?

rmpmla · « **Reply #3 on:** Jun 17, 2004 at 01:05 PM »

my second DIY sub

av_phile1 · « **Reply #4 on:** Jun 17, 2004 at 01:55 PM »

Nice DIY sub. Much better and more able electronic internals than what's i've seen in some commercial subs. What's the power rating?

jerix · « **Reply #5 on:** Jun 17, 2004 at 03:39 PM »

rmpmla, thats a very impressive project--- how much bro did it cost you for that amp? thnkx

s2kov · « **Reply #6 on:** Jun 17, 2004 at 03:43 PM »

Dalawa na!!!! Galing!!!!

Quote from: rmpmla on Jun 17, 2004 at 01:05 PM

my second DIY sub

rmpmla · « **Reply #7 on:** Jun 17, 2004 at 06:17 PM »

Quote from: av_phile1 on Jun 17, 2004 at 01:55 PM

Nice DIY sub. Much better and more able electronic internals than what's i've seen in some commercial subs. What's the power rating?

thanks av phile

.

the low pass filter used was based on rod elliott's EAS subwoofer. ito ginamit ko kasi ito ang pinakasimpleng (less parts) low pass filter circuit.

the amp uses 4 - OPA 549 chip amp. datasheet only indicates max output current of 10 amperes for an OPA549. i've seen somewhere in the net that OPA 549 can deliver 70 watts rms for 8 ohm load. so, that would have a total output of 280 watts.

rmpmla · « **Reply #8 on:** Jun 17, 2004 at 06:24 PM »

Quote from: jerix on Jun 17, 2004 at 03:39 PM

rmpmla, thats a very impressive project--- how much bro did it cost you for that amp? thnkx

thanks jerix

bro estimate ko sa amp, around 2k. mura kasi libre yung OPA549

rmpmla · « **Reply #9 on:** Jun 17, 2004 at 06:42 PM »

Quote from: s2kov on Jun 17, 2004 at 03:43 PM

Dalawa na!!!! Galing!!!!

s2kov salamat.

puro kopya lang yan

yung enclosure ginaya ko dun sa 12" MK powered sub ko. binuksan ko loob para malaman ko kung paano install yung electronics at bracing nung loob.
- used a connector between the amp and the power supply/speaker
- install a cross-brace inside the enclosure (para wag mag-resonate yung cabinet).

yung low pass filter - http://sound.westhost.com/project48.htm

ito ginamit ko kasi simple lang

hanapin ko yung link para sa amp section.

JojoD818 · « **Reply #10 on:** Jun 17, 2004 at 06:53 PM »

rmpmla,

nice projects bro!

my self-made MTM speakers

JojoD818 · « **Reply #11 on:** Jun 17, 2004 at 06:55 PM »

My ported 12" Targa sub powered by bridged-paralleled gainclones, with adjustable crossover frequency, satellite outputs, high and low level inputs also.

JojoD818 · « **Reply #12 on:** Jun 17, 2004 at 06:57 PM »

My 12" bandpass sub project that I use for HT purposes. Same with ported, powered by gainclones and with full featured crossovers, box-eq, subsonic filters, etc. Sayang at wala akong pic nun mga electronics inside. Kakatamad mag baklas, ang daming screws eh, maybe next time pag tweaking time.

rmpmla · « **Reply #13 on:** Jun 17, 2004 at 07:15 PM »

jojo thanks

nice subs you got there, too. ALL the works

mine is just fixed frequency and low signal input. di ko na kaya yung ibang features

rmpmla · « **Reply #14 on:** Jun 17, 2004 at 08:47 PM »

s2kov,

sent you a PM

JojoD818 · « **Reply #15 on:** Jun 17, 2004 at 09:51 PM »

Quote from: rmpmla on Jun 17, 2004 at 07:15 PM

jojo thanks

nice subs you got there, too. ALL the works

mine is just fixed frequency and low signal input. di ko na kaya yung ibang features

Di ko kasi kayang bumili ng buo na sub kaya diy na lang, customized pa lahat. Next upgrade ko dyan sa mga sub na yan eh auto power on/off para naman di na ako pindot ng pindot ng power switch.

rmpmla · « **Reply #16 on:** Jun 18, 2004 at 06:46 AM »

Quote from: JojoD818 on Jun 17, 2004 at 09:51 PM

Di ko kasi kayang bumili ng buo na sub kaya diy na lang, customized pa lahat. Next upgrade ko dyan sa mga sub na yan eh auto power on/off para naman di na ako pindot ng pindot ng power switch.

magandang feature yan for a powered sub

. please post naman details once you have done this upgrade

rmpmla · « **Reply #17 on:** Jun 18, 2004 at 06:48 AM »

Quote from: rmpmla on Jun 17, 2004 at 06:42 PM

s2kov salamat.

puro kopya lang yan

yung enclosure ginaya ko dun sa 12" MK powered sub ko. binuksan ko loob para malaman ko kung paano install yung electronics at bracing nung loob.
- used a connector between the amp and the power supply/speaker
- install a t- brace inside the enclosure (para wag mag-resonate yung cabinet.

yung low pass filter - http://sound.westhost.com/project48.htm

ito ginamit ko kasi simple lang

hanapin ko yung link para sa amp section.

for the amp section - http://www.freewebs.com/matttcatttweb/audio.htm

JojoD818 · « **Reply #18 on:** Jun 18, 2004 at 11:24 AM »

Quote from: rmpmla on Jun 18, 2004 at 06:46 AM

magandang feature yan for a powered sub . please post naman details once you have done this upgrade

most of the hi-end subs daw ay meron nito, naisip ko naman maganda meron nito kasi matipid sa koryente pag hindi ginagamit.

av_phile1 · « **Reply #19 on:** Jun 18, 2004 at 12:50 PM »

Quote from: JojoD818 on Jun 18, 2004 at 11:24 AM

most of the hi-end subs daw ay meron nito, naisip ko naman maganda meron nito kasi matipid sa koryente pag hindi ginagamit.

Even the DTX and USAudio subs have this auto shut-off feature after a few minutes without any signal.

For DIYers, I would suggest you incorporate a notch filter variable from 20Hz to 200hz. This would obviate the need for a parametric equalizer that can tame resonant bass peaking and standing waves in any room. You have at least one frequency peak you can tame. No room not meant to be an auditorium is immune to bass peaking and cancellation. Not even the most expensive subs can overcome peaking, unless it has a built-in EQ or notch filter.

cousin skeeter · « **Reply #20 on:** Jun 18, 2004 at 01:43 PM »

Quote from: rmpmla on Jun 18, 2004 at 06:46 AM

magandang feature yan for a powered sub . please post naman details once you have done this upgrade

bro, i noticed you had two trafos in your sub. whats the smaller one for? is it for the bridge? i used only one trafo and used regulator ICs to supply the bridge.

rmpmla · « **Reply #21 on:** Jun 18, 2004 at 10:10 PM »

Quote from: av_phile1 on Jun 18, 2004 at 12:50 PM

Even the DTX and USAudio subs have this auto shut-off feature after a few minutes without any signal.

Ah okay

hindi na kasi ako nag aa-audition ng sub mapa lo end o hi end man.
kaya di ko alam na common feature na pala ito sa powered sub. i am currently using two branded subs both have no auto-shut off. luma model na kasi

rmpmla · « **Reply #22 on:** Jun 18, 2004 at 10:27 PM »

Quote from: cousin skeeter on Jun 18, 2004 at 01:43 PM

bro, i noticed you had two trafos in your sub. whats the smaller one for? is it for the bridge? i used only one trafo and used regulator ICs to supply the bridge.

i used it to power the low pass filter and the line driver for the bridge+parallel amplifier.
mas ok yung ginawa mo using only one transformer supplying the GC amp and the line driver via regulator ICs.
hindi ako familiar sa regulator ICs kaya bumili na lang ako ng maliit na transformer

bro, PM naman shematic nung supply mo para dun sa bridge

. if not too complicated, will change my power supply to single transformer.

thanks

JojoD818 · « **Reply #23 on:** Jun 19, 2004 at 10:34 AM »

Quote from: rmpmla on Jun 18, 2004 at 10:27 PM

i used it to power the low pass filter and the line driver for the bridge+parallel amplifier.
mas ok yung ginawa mo using only one transformer supplying the GC amp and the line driver via regulator ICs.
hindi ako familiar sa regulator ICs kaya bumili na lang ako ng maliit na transformer

bro, PM naman shematic nung supply mo para dun sa bridge . if not too complicated, will change my power supply to single transformer.

thanks

You can use 3-terminal fixed regulators for that application. Look for National's LM78XX series positive voltage regulator and LM79XX series negative voltage regulator for reference.

Or even a resistor, a 100uf cap, and a zener will do!

As long as you only power opamps though.

rmpmla · « **Reply #24 on:** Jun 19, 2004 at 04:53 PM »

Quote from: JojoD818 on Jun 19, 2004 at 10:34 AM

You can use 3-terminal fixed regulators for that application. Look for National's LM78XX series positive voltage regulator and LM79XX series negative voltage regulator for reference.

Or even a resistor, a 100uf cap, and a zener will do! As long as you only power opamps though.

Jojo, thanks

check ko sa NS at TI website yang 3-terminal fixed regulators

JojoD818 · « **Reply #25 on:** Jun 19, 2004 at 11:23 PM »

Quote from: rmpmla on Jun 19, 2004 at 04:53 PM

Jojo, thanks

check ko sa NS at TI website yang 3-terminal fixed regulators

Your welcome bro, good luck.

Any other speaker diyers here?

cousin skeeter · « **Reply #26 on:** Jun 21, 2004 at 11:33 AM »

Quote from: JojoD818 on Jun 19, 2004 at 10:34 AM

You can use 3-terminal fixed regulators for that application. Look for National's LM78XX series positive voltage regulator and LM79XX series negative voltage regulator for reference.

Or even a resistor, a 100uf cap, and a zener will do! As long as you only power opamps though.

yah, those are what i used. be careful with the pin assigments. the 78xx and the 79xx pins for input, ground and output are not the same. i toasted my 1st 7915 because i assumed it had the same pin assignment as the 7815. Charge to experience na lang, hehehe.

JojoD818 · « **Reply #27 on:** Jun 21, 2004 at 12:06 PM »

Quote from: cousin skeeter on Jun 21, 2004 at 11:33 AM

yah, those are what i used. be careful with the pin assigments. the 78xx and the 79xx pins for input, ground and output are not the same. i toasted my 1st 7915 because i assumed it had the same pin assignment as the 7815. Charge to experience na lang, hehehe.

Huh? Dapat talaga we read the datasheet! Hahaha, Ayus cousin skeeter, charge one 7915 to experience, at least mura lang.

jerix · « **Reply #28 on:** Jun 22, 2004 at 10:24 AM »

hey bros kakainggit talaga kayo -- konting lecture nga -please -

can u please give me a tip on what kind and what is the value of the capacitor i should use to my speaker, to have better vocals ? thnks

JojoD818 · « **Reply #29 on:** Jun 22, 2004 at 06:15 PM »

Quote from: jerix on Jun 22, 2004 at 10:24 AM

hey bros kakainggit talaga kayo -- konting lecture nga -please -

can u please give me a tip on what kind and what is the value of the capacitor i should use to my speaker, to have better vocals ? thnks

tip is for waiters, vallet parking, etc. my friend.

What you need is to learn how a passive crossover circuit works and then you can apply that to your existing speaker system. Also the make of the capacitor has an adverse effect on the sound so be careful when you choose.