Hi guys am planning to make 4 of these amps..
Mono amps...
i use 4 with one speaker each for 500 watts output
and i used the same 4 but with 8 speakers to get 1000 watt RMS..
What say ?? any one see's problem in this IDEA ??
Mono amps...
i use 4 with one speaker each for 500 watts output
and i used the same 4 but with 8 speakers to get 1000 watt RMS..
What say ?? any one see's problem in this IDEA ??
You will make 4 amplifiers and connect 4 ohm speakers so you can have 4x250w?
That would be vary scary and loud, especially if you by PA speakers with at least 95db! 😱 Then, just one channel (lets say mid-high) will be 98db because of 2 woofers. Then, ad the magic of active crossover which gives more space for speaker to breath so you can pump even more power, ideally twice the power! that is 3 db more!
I had 4x130w and active crossover at 350hz. At 350hz the power is equal, 50% to bas and 50% to mid-high. So, 130w for bas and 130w for mid-high. That is total of 260wats. In literature they say that this is equal to 520w per channel, for regular box with passive crossover and just one amplifier.... The point here is that it will be much louder!
I was so surprised how loud this setup can be!
Another thing, are you planing to make 4 amps in one box? The transformer will be VERY big! At least 1500VA! 😱
Better is to make two separate stereo amplifiers. Mine was all in one and it was really heavy (having two 400VA toroids 🙂 )
That would be vary scary and loud, especially if you by PA speakers with at least 95db! 😱 Then, just one channel (lets say mid-high) will be 98db because of 2 woofers. Then, ad the magic of active crossover which gives more space for speaker to breath so you can pump even more power, ideally twice the power! that is 3 db more!
I had 4x130w and active crossover at 350hz. At 350hz the power is equal, 50% to bas and 50% to mid-high. So, 130w for bas and 130w for mid-high. That is total of 260wats. In literature they say that this is equal to 520w per channel, for regular box with passive crossover and just one amplifier.... The point here is that it will be much louder!
I was so surprised how loud this setup can be!
Another thing, are you planing to make 4 amps in one box? The transformer will be VERY big! At least 1500VA! 😱
Better is to make two separate stereo amplifiers. Mine was all in one and it was really heavy (having two 400VA toroids 🙂 )
Hey no dude...not all in on BOX 
Am plannin to make 4 mono amps with seperate cabinets.
40-0-40 @7 amps transformer, 4 x 22000 uf filter capacitors in each cabinet.
An am making wooden bodies, giving it a Vintage look😉
The advantage of mono amps is that i am more scalable and more redundant.
You see any disadvntage in this ?
Thanks for the reply.
Am plannin to make 4 mono amps with seperate cabinets.
40-0-40 @7 amps transformer, 4 x 22000 uf filter capacitors in each cabinet.
An am making wooden bodies, giving it a Vintage look😉
The advantage of mono amps is that i am more scalable and more redundant.
You see any disadvntage in this ?
Thanks for the reply.
Hey and i wont be using 4 ohms speakers but connectin two 8 ohms speakers in parellel...
So 2 speakers per channel of 8 ohms which will make 4 ohms load.
So 2 speakers per channel of 8 ohms which will make 4 ohms load.
Hi,
40Vac will give about 55Vdc to 60Vdc at the amplifier.
A BJT amp using these supplies will give between 250W to 320W into 4r0 if the components are well proportioned to give good value. 22mF is perfect for extended low bass into 8ohm loading. I recommend double this smoothing for 4ohm loading. If you do not require sub-bass performance then the tiny bit lost at the bottom end from using 22mF smoothing should be tolerable.
Your two 8ohm drivers when paralleled give an effective 4ohm load.
Make the output stage and the driver stage strong enough to drive a 4ohm reactive speaker load.
40Vac will give about 55Vdc to 60Vdc at the amplifier.
A BJT amp using these supplies will give between 250W to 320W into 4r0 if the components are well proportioned to give good value. 22mF is perfect for extended low bass into 8ohm loading. I recommend double this smoothing for 4ohm loading. If you do not require sub-bass performance then the tiny bit lost at the bottom end from using 22mF smoothing should be tolerable.
Your two 8ohm drivers when paralleled give an effective 4ohm load.
Make the output stage and the driver stage strong enough to drive a 4ohm reactive speaker load.
Hey guys any one has a 1000 watt schematic 😀
I saw one on the forum but now am not finding it.
Thanks andrew for your inputs, the maker of the amp says it runs fine on 4 ohm load. You might wanna see the schematics?
I saw one on the forum but now am not finding it.
Thanks andrew for your inputs, the maker of the amp says it runs fine on 4 ohm load. You might wanna see the schematics?
4 mono blocks are totally ok! 🙂
Are you gonna use your system for home listening or for parties?
Are you gonna use your system for home listening or for parties?
1000 watts with 8 x 18 inches speaker boxes for home listening 😀
I wont have space to sit if i put all thoes boxes in my room😱
an when i play them i would be out of the house
I would be using them for parties or Rock shows or chruch programs etc etc..
I wont have space to sit if i put all thoes boxes in my room😱
an when i play them i would be out of the house
I would be using them for parties or Rock shows or chruch programs etc etc..
Outdoors is equivalent to operating into half space.
Do you want to consider horn loading to keep up the volume?
Do you want to consider horn loading to keep up the volume?
Feed me in Bro,,
I have no idea what the Horns or the LAB horns are...
It woudl be great if you could.
Thanks
I have no idea what the Horns or the LAB horns are...
It woudl be great if you could.
Thanks
Help!
Hi!
I want to make this M250 amplifier for my studies on school.
I’ve seen that there are 2 PCB’s for this?!
(http://www.diyaudio.com/forums/attachment.php?s=&postid=750570&stamp=1130104082 and http://www.diyaudio.com/forums/attachment.php?s=&postid=1300383&stamp=1189664656 )
I prefer the second one because it’s more clear than the first to me actually 😛
Does anyone has one of these pcb’s in big (or digital) for making it, or does anyone have an idea where I can buy them?
Thanks!
Hi!
I want to make this M250 amplifier for my studies on school.
I’ve seen that there are 2 PCB’s for this?!
(http://www.diyaudio.com/forums/attachment.php?s=&postid=750570&stamp=1130104082 and http://www.diyaudio.com/forums/attachment.php?s=&postid=1300383&stamp=1189664656 )
I prefer the second one because it’s more clear than the first to me actually 😛
Does anyone has one of these pcb’s in big (or digital) for making it, or does anyone have an idea where I can buy them?
Thanks!
Well the second one is my PCB.
You can buy ot from me,
What you says guys how much shud is charge ?? i have the PCB with me and its 100% working.
Do let me know
You can buy ot from me,
What you says guys how much shud is charge ?? i have the PCB with me and its 100% working.
Do let me know
well.. not to much I hope😀
is it the pcb (hardware) itself, or the layout (software)?
Thx for fast reply!
is it the pcb (hardware) itself, or the layout (software)?
Thx for fast reply!
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