Ahmad_tbp said:hi aaaaaaaallll 😉
i m busy w amp 🙂 ... i think i find a way to build the leach super amp w mj15015/16 for my subs 😀
any idea ???
do u have any idea , for protectin circuit , and sub filter and of course crosswover ... ? any good pcb or schematic ?
i m awaitin ur ideas ... 😉
( i just removed my photo !!! , i have no idea why i put that there .. do u know ? lol 😛 )
I have a circuit for a DC detector to protect your speaker if your amp fails. I'll find it and post it to you.
As far as the other stuff goes, if this box and amp are for your bass guitar only then I would forget the sub filter and any fancy crossover. I believe that the sound of bass guitar should not be filtered because even though technically it only plays bass there are many harmonics that contribute to the sound. Why would you want to lose the clicks and snaps of great bass riffs? Invest in a simple compressor instead or make one (compressors are easy).
You must run a full range PA speaker as well as your subwoofer because the subwoofer will not go high enough. This also removes the need for a midrange. If you decided to run a horn tweeter as well then a simple series capacitor will be enough crossover or just use a piezo instead.
Cheers
Jumber?
Haaaaargh ...did I say Jumber?
I meant woolly jumper. Does it get cold in Iran ...if it does then you have a woolly jumper. It is something you wear to keep warm . LOL.
Cheers🙂
Haaaaargh ...did I say Jumber?
I meant woolly jumper. Does it get cold in Iran ...if it does then you have a woolly jumper. It is something you wear to keep warm . LOL.Cheers🙂
hi ... yeah it s become cold , but not too much ..
i already have built a compressor bout 1 year ago ,,, but i donno how to build the limiter , i don have any schematic or anythin for it 🙁 ...any idea ?
i already have built a compressor bout 1 year ago ,,, but i donno how to build the limiter , i don have any schematic or anythin for it 🙁 ...any idea ?
You must be "VERY" careful with polyfill or any kind of sound deadener in a bandpass box. It will change the tuning, and the tuning of a bandpass box is very picky about effective chamber volume.
I recommend to add bracing on the front chamber, it's a large chamber or not? Tried to put heavy stuff on your subwoofer or pushing on the side to see if it's changing the sound?
Sometimes it can be a leg that's a bit too short or something ringing in the room also... good luck!
I recommend to add bracing on the front chamber, it's a large chamber or not? Tried to put heavy stuff on your subwoofer or pushing on the side to see if it's changing the sound?
Sometimes it can be a leg that's a bit too short or something ringing in the room also... good luck!
Thanks a ton Simon and Quasi. I'll try this stuff out tonight.
Ahmad -- you really don't want a limiter. Just use the compressor you built. One thing about compressors: the more you compress the signal the more low end you'll have. One of the experts could probably tell you why; I don't know. Be advised that you'll need to reduce the low end if you use much compression.
How's the project coming along?
Ahmad -- you really don't want a limiter. Just use the compressor you built. One thing about compressors: the more you compress the signal the more low end you'll have. One of the experts could probably tell you why; I don't know. Be advised that you'll need to reduce the low end if you use much compression.
How's the project coming along?
Simon & Quasi -- you two had it right. The general ringing was lack of bracing in the bottom. I ran a sweep from 20 to 100 hz and the box just lit up about 45hz--I thought it might do the out-of-level washing machine thing and just take off across the floor. Some bracing took care of that. I put carpet pad on two sides of the front chamber which got rid of some additional ringing. Thanks again.
Simon: I had a question about the EBS enclosure pictured in your earlier posting. Are those cubbies (square areas with partitions having circular passthroughs) tuned resonance cavities or just a way of doing bracing? Excuse my ignorance, but I've never seen anything like that.
hi Barton
yes ,, they r some kind of bracin ...
and i still stoped in amp 🙁 ..
i boughht some equipment for silk screen printin ,,, but i cant make them work 😛 ...
yes ,, they r some kind of bracin ...
and i still stoped in amp 🙁 ..
i boughht some equipment for silk screen printin ,,, but i cant make them work 😛 ...
hi any body out there ? 🙁 ...
if i use bracin inside the box , should i change the pipe size or diameter ?
if i use bracin inside the box , should i change the pipe size or diameter ?
Ahmad_tbp said:
You could try to work out the volume of air the bracing takes and then adjust you box size to make up for it.
But don't worry too much. It will be easy to adjust the port.
Cheers
Barton said:
It's just a way of doing bracing, I followed the plan shown on the link above the picture. It's the EBS enclosure plan made by Adire Audio.
The same piece of wood can touch 4 box walls to prevent flexing, very good bracing.
Ahmad_tbp said:
Yes, it's good, but I would use smaller holes on the big piece of wood in the center, so that the two braces behind have wood on each side, like in the picture I showed you. It will be stronger this way. I would also push the center piece a bit more in the center, it can be *almost* in the center like I said, just not exactly in the center. I'm a bit perfectionist you know, if you're already satisfied, I think it will sound right already...
You can add bracing in the woofer part if you want to, it can help. But in that part it's more important to use some kind of stuffing. Check around you to see what people use inside speakers for stuffing, stuff like polyfill.
When you are ready to build your box, you can tell us and we will help you calculate everything to remove volume taken by the port, speakers and bracing. Then, we can tell you the final port length. If you are good in mathematics, I guess you can calculate the internal volume easily...
hi all , thnx for help 🙂 ..
i m goin to see some carpenter 😉 .. and i ll inform u bout the inner volume .. thank u so much men 😉
i m goin to see some carpenter 😉 .. and i ll inform u bout the inner volume .. thank u so much men 😉
project is still stop 🙁 ...
i just think its maybe better if i tryin to earn money & buy better speakers .. what do u think ??? 🙁
i just think its maybe better if i tryin to earn money & buy better speakers .. what do u think ??? 🙁
Well I guess that bass cabs are really expensive in your area and good speakers are really expensive too. I think your idea could be a good first try. I can't help you on the amplifier part...
hiiiii simon5 & quasi & others ... i m back again !!! ...
lol .. hope u help me again ...
i bought two RCF 12" full range speakers , and another sony sub ...
plzz help me design my cab again ,, im starting to buil the leach super amp for that .. any idea ???
how are the RCF speakers i bought ???
i coudn t find any info bout them on net the are rcf L12-31k ...
lol .. hope u help me again ...
i bought two RCF 12" full range speakers , and another sony sub ...
plzz help me design my cab again ,, im starting to buil the leach super amp for that .. any idea ???
how are the RCF speakers i bought ???
i coudn t find any info bout them on net the are rcf L12-31k ...
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