Hi guys,
I am looking to make a diy 2 channel amp for my main system. It will be driving my ER18 MTM speakers, these drop at the minimum to 4 ohms. These are 2 way MTMs that use the seas er18 rnx drivers which are rated at 8 ohms, 80 watts rms and 250 watts peak, I think the sensitivity is about 88.5.
These will also be driving my alpair 7s from time to time and these are pretty much consistently at 3.6 ohms except for the peak. These have a 20 watt rms rating, so power should not be an issue
The other side will be a b1 preamp.
I guess I should be ok with around 100-125 (200-250) odd watts into 8 (4) ohms. This setup will be used for movies as well as music. I have an avr/cc/surrounds. I will have to figure out a way to integrate my sub for music with it later. I know it will be a mess.
Class A and tubes are ruled out. For this kind of power, it will need huge cabs and heatsinks, huge costs, huge bills and huge heat
. WAF is very very low for class a.
I dont think chipamps can easily give this kind of power or handle 4 ohms loads peacefully. If there are some really good ones, please let me know.
I guess that leaves class D.
I liked both hypex and class d audio boards, but those are expensive and I would prefer to cust costs. I saw the ljm's l15d and l20d (IR based) designs, kits are available cheap (atleast for l20d) on fleabay. These address some of the issues mentioned on diyaudio with the IR reference kits. I might wish to upgrade some components once I get the kit.
I think a 300va-400va trafo should be plenty for this. The question now is the power supply and the caps. Please recommend some suitable ones, preferably something for which atleast a pcb can be obtained easily and cheaply.
Please also suggest if you are aware of some other design thats good. Preferrably not too expensive, atleast pcb should be easily available, dont want to get into making or designing a pcb, as it is I am short on skills, dont want to bite more than I can chew.
I am looking to make a diy 2 channel amp for my main system. It will be driving my ER18 MTM speakers, these drop at the minimum to 4 ohms. These are 2 way MTMs that use the seas er18 rnx drivers which are rated at 8 ohms, 80 watts rms and 250 watts peak, I think the sensitivity is about 88.5.
These will also be driving my alpair 7s from time to time and these are pretty much consistently at 3.6 ohms except for the peak. These have a 20 watt rms rating, so power should not be an issue
The other side will be a b1 preamp.
I guess I should be ok with around 100-125 (200-250) odd watts into 8 (4) ohms. This setup will be used for movies as well as music. I have an avr/cc/surrounds. I will have to figure out a way to integrate my sub for music with it later. I know it will be a mess.
Class A and tubes are ruled out. For this kind of power, it will need huge cabs and heatsinks, huge costs, huge bills and huge heat
. WAF is very very low for class a.I dont think chipamps can easily give this kind of power or handle 4 ohms loads peacefully. If there are some really good ones, please let me know.
I guess that leaves class D.
I liked both hypex and class d audio boards, but those are expensive and I would prefer to cust costs. I saw the ljm's l15d and l20d (IR based) designs, kits are available cheap (atleast for l20d) on fleabay. These address some of the issues mentioned on diyaudio with the IR reference kits. I might wish to upgrade some components once I get the kit.
I think a 300va-400va trafo should be plenty for this. The question now is the power supply and the caps. Please recommend some suitable ones, preferably something for which atleast a pcb can be obtained easily and cheaply.
Please also suggest if you are aware of some other design thats good. Preferrably not too expensive, atleast pcb should be easily available, dont want to get into making or designing a pcb, as it is I am short on skills, dont want to bite more than I can chew
.
