Hi,
I am trying to build a good quality mid power audio amplifier. I have tested TDA2050 bridge amp, got a good result but not enough. Got lack of bass and high response(the output is giving rich mid range). I have tested the ampli on a
a)SONODYNE SX505 sound box(8"woofer + 2" tweeter, 4E impedence and 50W RMS capacity)
b)+-18V, 2Amp supply
c)input from my PC.
Can any one suggest how to improve the performance.
Im confused, which chip is best TDA or STK? Should I go for STK402-100 for better result? 😕
Please please some one help me.🙂
diptangshu@gmail.com
I am trying to build a good quality mid power audio amplifier. I have tested TDA2050 bridge amp, got a good result but not enough. Got lack of bass and high response(the output is giving rich mid range). I have tested the ampli on a
a)SONODYNE SX505 sound box(8"woofer + 2" tweeter, 4E impedence and 50W RMS capacity)
b)+-18V, 2Amp supply
c)input from my PC.
Can any one suggest how to improve the performance.
Im confused, which chip is best TDA or STK? Should I go for STK402-100 for better result? 😕
Please please some one help me.🙂
diptangshu@gmail.com
hello.
can you show a schematic?.........what parts have you used?
is the power supply used with a stereo amp or with only one channel?
greetings
can you show a schematic?.........what parts have you used?
is the power supply used with a stereo amp or with only one channel?
greetings
It's because of your speakers. Those are some really terrible ones, ditch them and get something better. The frequency response of STK and TDA amplifiers is not very different, only distortion profile and driving ability changes with different amplifiers. In your case, it is the speaker that is the issue. The Philips 8" woofer used in those boxes has anemic bass at best, and the tweeter's sound can be best described as a squeak.
That is why you needed the equally terrible partnering Sonodyne amplifiers to drive them, they had a shrill presentation with zero midrange detail and a very high output impedance, which would create the boom that would hear when the whole thing played together. Really, you're wasting your time trying to build an amplifier for those speakers and expecting high quality reproduction.
I get reasonable sound out of locally available products, but it's really not very easy, and you need a bit of EQ to even out the horribly uneven response of most speakers available here.
That is why you needed the equally terrible partnering Sonodyne amplifiers to drive them,
Do you suggest any amp which may match with those boxes? or I would go for a new sound box set? If I go for a new box set which speakers(brand) can I get from local market? Now days in Kolkata market good quality product availability is almost NIL.
Thanks.....🙁
Do you suggest any amp which may match with those boxes? or I would go for a new sound box set? If I go for a new box set which speakers(brand) can I get from local market? Now days in Kolkata market good quality product availability is almost NIL.
Thanks.....🙁
Sounds like sangram knows those speakers, what he said is probably the big thing.
Other contributing factors may be:
Shielded interconnects with too much capacitance between cable and shield will kill the treble. Higher source impedances make this worse.
Is that a headphones output, or a line out?
When I tried feeding my own chipamps from the headphones out of my personal CD player the bass was lame (and treble harsh). From a line-out they were fine.
Other contributing factors may be:
Shielded interconnects with too much capacitance between cable and shield will kill the treble. Higher source impedances make this worse.
Is that a headphones output, or a line out?
When I tried feeding my own chipamps from the headphones out of my personal CD player the bass was lame (and treble harsh). From a line-out they were fine.
Ok, I dont decide what shoul I do next. Actually I wanted to use the SX505 boxes very much, because I am a fan of Sonodyne. If any one can specially SNAGRAM can give me any suggession I will be very thankful to him......
I have heard the big brother 909, the smaller 606 and the 505 and they all sound very ordinary. They were partnering speakers for a mini system sold by a Calcutta-based manufacturer which actually had pretty decent equipment till the 90s, when Anindya took over and turned the direction of the company towards the mass market.
In the Calcutta market you cannot get decent speakers at all. Period. I did manage to squeeze some performance out of some local drivers, but it wasn't much and it took a lot of doing, a lot of Eq and a lot of sweat and cash:
Everything was sourced in Calcutta, either recently or fifteen years ago.
My advice: Try to see if you can get a partnering amplifier for it from the used market, or use the equaliser in your PC. I wouldn't put any more effort behind those speakers. Sonodyne made some excellent gear - mostly inspired by the Japanese manufacturers of the day - but the SX wasn't it, those were horrible.
Good Luck! 🙂 If you want to chat send me a PM and we can talk about other stuff you can try, but you'll *have* to ditch those 'soundboxes'. I don't want to hurt your feelings, but they aren't capable of quality reproduction.
In the Calcutta market you cannot get decent speakers at all. Period. I did manage to squeeze some performance out of some local drivers, but it wasn't much and it took a lot of doing, a lot of Eq and a lot of sweat and cash:
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An externally hosted image should be here but it was not working when we last tested it.
Everything was sourced in Calcutta, either recently or fifteen years ago.
My advice: Try to see if you can get a partnering amplifier for it from the used market, or use the equaliser in your PC. I wouldn't put any more effort behind those speakers. Sonodyne made some excellent gear - mostly inspired by the Japanese manufacturers of the day - but the SX wasn't it, those were horrible.
Good Luck! 🙂 If you want to chat send me a PM and we can talk about other stuff you can try, but you'll *have* to ditch those 'soundboxes'. I don't want to hurt your feelings, but they aren't capable of quality reproduction.
Thanks Sangram, I will think on your suggession. But also will try to improve that project currently I have. Sangram if I want to walk on your way, I would like to build a sub rather than a convensional 2 channel, the system I currently have. Can you suggest a woofer to build a sub system?
Do you have any gmail ID, so we can come to chat on google talk?😛
Those aren't subs in the picture 🙂 they're fourteen year old woofers in a sealed box, isobaric config. They go all the way up to ~400Hz, and need lots of EQ to get any usable bottom end. I don't like subwoofers, FWIW.
For a subwoofer built locally, you have to use the Eminence Lab12 (around 8K, pretty easy to find). There are plenty of box options, Eminence themselves have a lot of published design and it's a pretty popular woofer around here as well with lots of projects catering to it.
I do have a gtalk ID, but don't come online at all, just for a backup email. Don't use an IM, so sorry 🙂
For a subwoofer built locally, you have to use the Eminence Lab12 (around 8K, pretty easy to find). There are plenty of box options, Eminence themselves have a lot of published design and it's a pretty popular woofer around here as well with lots of projects catering to it.
I do have a gtalk ID, but don't come online at all, just for a backup email. Don't use an IM, so sorry 🙂
is this a line array you are using,what speaker do you used?
it look the same i bought for.99$ ,i bought 100 and build a line array with 20 on each side and a cheap tweeter,i use a sub with it and it sound very good, for hometheater it`s crazy,pm me we will talk
i am 50% indian and i live inthe indian ocean
cwnmusic@yahoo.co.uk
bye
Abes
it look the same i bought for.99$ ,i bought 100 and build a line array with 20 on each side and a cheap tweeter,i use a sub with it and it sound very good, for hometheater it`s crazy,pm me we will talk
i am 50% indian and i live inthe indian ocean
cwnmusic@yahoo.co.uk
bye
Abes
abes, those 3" drivers are from Eastech, they cost me $3.50 each. It's not really a line array - too short, plus it's power tapered towards the middle and the center speaker is crossed over at 8KHz to help with the top end. Still requires a bit of EQ though. It was a junk box project - I had the amplifiers and 12" woofers laying about, the 3"ers and the boxes/baffles were new and everything else is old.
There is no subwoofer, but is actively amplified by a pair of ancient STK stereo amplifiers (~18 years old). Sounds reasonable for the bargain nature of the project. The point hee is that it is possible to get reasonable sound if you go from scratch, but with some specific speakers there is no way to salvage the sound.
There is no subwoofer, but is actively amplified by a pair of ancient STK stereo amplifiers (~18 years old). Sounds reasonable for the bargain nature of the project. The point hee is that it is possible to get reasonable sound if you go from scratch, but with some specific speakers there is no way to salvage the sound.
Some of the older STK have almost all of a discrete amplifier crammed inside that really big chip, and these have a nicely laid back and clear sound.
As far as the TDA7293, TDA7294, well they're every bit as picky on their power supply side and would take at least as much components to make as good of a sound as the STK. Its certainly possible. I just wanted to convey that, for similar results, complexity is also similar.
And, of course, both benefit greatly from clean power (a really good power supply). Definitely, with both of these sorts of amplifiers, the power supply makes the difference between hi-fi or mid-fi.
As far as the TDA7293, TDA7294, well they're every bit as picky on their power supply side and would take at least as much components to make as good of a sound as the STK. Its certainly possible. I just wanted to convey that, for similar results, complexity is also similar.
And, of course, both benefit greatly from clean power (a really good power supply). Definitely, with both of these sorts of amplifiers, the power supply makes the difference between hi-fi or mid-fi.
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