Thanks everyone, i completely forgot to look at the impidance graph !
Well 6 ohms seems much better, And the thing is i want to use these speakers with a subwoofer and an active crossover so the amp is not going to handle any low bass that the speakers cant play.
As for the room size and listing level well this room is really small. Around 3.5 by 3.5 m with 2.4 m height, But actual size is around 3.5m by around 3m because the entire right wall is covered with closet and bookshelf.
The acoustics are not perfetc but i worked out all the speaker placements and it is actually pretty nice, it also helps that the closets, bed and shelves break up all the sound waves.
I get enough volume for most things even with cheap pam8403 amplifier boards.
All in all i am really satisfied with the speakers and acoustics considering my bad living situation currently.
I do plan on moving to a larger space as soon as i can but then i am also going to build a larger and more serious system.
So for now only option is small and budget.
Well 6 ohms seems much better, And the thing is i want to use these speakers with a subwoofer and an active crossover so the amp is not going to handle any low bass that the speakers cant play.
As for the room size and listing level well this room is really small. Around 3.5 by 3.5 m with 2.4 m height, But actual size is around 3.5m by around 3m because the entire right wall is covered with closet and bookshelf.
The acoustics are not perfetc but i worked out all the speaker placements and it is actually pretty nice, it also helps that the closets, bed and shelves break up all the sound waves.
I get enough volume for most things even with cheap pam8403 amplifier boards.
All in all i am really satisfied with the speakers and acoustics considering my bad living situation currently.
I do plan on moving to a larger space as soon as i can but then i am also going to build a larger and more serious system.
So for now only option is small and budget.
If you are still interested on how LM1875 performs if in parallel, I just finished measuring one of my builds. I am using balanced inputs. You can see it here - https://www.diyaudio.com/community/...lleled-and-measured-for-thd-and-power.400438/
The TDA 2050V from manufacturer UTC is a Korean clone of the none existing TDA2050. 1 euro!!!
TDA2050V UTC
The TDA2050V is limited by 25V per rail, i used a 15VAC 120VA (-so rail is about 21V) transfomer and squeezed out 37WATT per channel on 4R.
measured with resistive 4R load and oscope. rail caps are about 4x3900µF per rail.
the 21V per rail are "ideal" for 4R load.
not bad
chris
TDA2050V UTC
The TDA2050V is limited by 25V per rail, i used a 15VAC 120VA (-so rail is about 21V) transfomer and squeezed out 37WATT per channel on 4R.
measured with resistive 4R load and oscope. rail caps are about 4x3900µF per rail.
the 21V per rail are "ideal" for 4R load.
not bad
chris
Thanks for all the help, after some thinking i decided to go with lm1875 design for now.
It's simple,not expensive and small so i can use a smaller chassis (with adequate heatsinks)
I can also experiment with utc tda2050 since it's pin compatible with lm1875 and can use the same pcb.
For pcb i am going to use some of those Chinese kits from ebay since i heard that they are a good design.
Now i only need to figure out the protection.
There are kits on ebay available that i could test out, But if someone knows of something more reliable please let me know.
It's simple,not expensive and small so i can use a smaller chassis (with adequate heatsinks)
I can also experiment with utc tda2050 since it's pin compatible with lm1875 and can use the same pcb.
For pcb i am going to use some of those Chinese kits from ebay since i heard that they are a good design.
Now i only need to figure out the protection.
There are kits on ebay available that i could test out, But if someone knows of something more reliable please let me know.