40W will be peak power and is not to much for a 25W speakers, but is your choise. What are the type of your woofers?
I listen in my setup with a 120W amplifier on a 87-88db sensibility speakers. Usually I use around 0.5...1W average power. When I used an amplifier with 30W output power it was too less power available for peaks on fortisimo passages.
I listen in my setup with a 120W amplifier on a 87-88db sensibility speakers. Usually I use around 0.5...1W average power. When I used an amplifier with 30W output power it was too less power available for peaks on fortisimo passages.
But if you have lower impedance loudspeaker syou want to use lower rails, realistic for low impedance loads is probablty 15-20w.
dave
I thought 40WRMS in bridged mode as the rating.
Are you sure about what you are saying?
Dave:
He has rails that will give 20W or so, 18-0-18 transformer for 25-0-25 DC. He says that is in the data sheet.
So I feel it is not an issue, a conservative start is always good.
Are you sure about what you are saying?
Dave:
He has rails that will give 20W or so, 18-0-18 transformer for 25-0-25 DC. He says that is in the data sheet.
So I feel it is not an issue, a conservative start is always good.
And after this a full redesign. This is your recommendation?
The tweeter need maximum 20% (depend of crossover point) from total power. If you use a 10W amplifier for tweeter then you need 50W for woofer.
Yes is 20W on 4Ω at +/-25V (according to figure 9 from datasheet) but this is with a stabilized power supply, but real power supply will drop under load and the power will decrease. On bridge connection, only with 8Ω (higher load will have less power), the power will be 40W.
But I have no interest in convincing anyone that it is so, everyone can believe and do as he wants.
He is not fully comfortable in English.
And mentions 25W woofer and 25W tweeter, odd combination.
I would expect a full range with either woofer or tweeter, and tweeters are usually low powered, like mentioned above.
Resistance not specified....
Here Philips drivers used to be 8 ohms, later they became 4 ohms in production.
So I stick to a lower power option to start with, then later we can always do something about it.
And mentions 25W woofer and 25W tweeter, odd combination.
I would expect a full range with either woofer or tweeter, and tweeters are usually low powered, like mentioned above.
Resistance not specified....
Here Philips drivers used to be 8 ohms, later they became 4 ohms in production.
So I stick to a lower power option to start with, then later we can always do something about it.
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That is enough information to start work, I think...
I speak 5 languages, things can get confusing...don't take it to heart, it sometimes happens that the meaning can change in translation.
I speak 5 languages, things can get confusing...don't take it to heart, it sometimes happens that the meaning can change in translation.
Yes, I now that 25w tweeter and 25w woofer is weird combination but I dont know any good chip for tweeter with lower power. I know tda2030 but I want to power everything with 25-0-25V and tda2030 has 25v limit and i dont want to risk it
It is possible to use same chip for tweeter section but i recommend a small capacitor coupled class-a amp.
Okey, i will look for something. Do you know some class a amplifier scheme good for that?
Follow planet10 advice or....
https://www.diyaudio.com/community/...o-feedback-simple-circuit-great-sound.234515/
https://www.diyaudio.com/community/...o-feedback-simple-circuit-great-sound.234515/
You get 12V chip amps, you can use one for tweeter with less power.
2030 may work with 0-18 supply, and less output, you can try that for tweeter.
2030 may work with 0-18 supply, and less output, you can try that for tweeter.
I like that you find a lot of false problems, like the power of amplifier is to high for the available speakers.
Is like you say that is forbidden to use a 200hp car in the city or crowded streets. No one is forcing you to push too hard the gas pedal but you lose the pleasure of driving a car and remain only with congested trafic.
Is like you say that is forbidden to use a 200hp car in the city or crowded streets. No one is forcing you to push too hard the gas pedal but you lose the pleasure of driving a car and remain only with congested trafic.
As already mentioned above, you can lower the supply voltage or can reduce the gain/sensitivity to drive tweeter with less power.