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| Need help to calculate data for this amp. |
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| FriedMule:
The circuit is all there is from the amplifier, wasn't aware that it should miss anything, no one have said that before. What many says about this amplifier is that it is more on the light side then the base, that you in fact should pare it with darker sounding speakers. Whar are the max current this amplifier can handle? |
| FriedMule:
Audioguru sorry did forgot to reply on your question about what I mean with control. What I mean are that the amplifier shall have enough power to force the speaker to move how and when the music demands it, no struggle to start or break the movement of the speaker (iron fist). |
| Audioguru:
74W into 8 ohms is 24.3V RMS. Then the RMS current is 74W/24.3V= 3.05A. the peak current is 3.05A x 1.414= 4.3A. 150W into 4 ohms for short term peaks is a peak current of 6.1A but much of the current might be distortion. The output and driver transistors have a range of ratings so some might produce more current but others might produce less current. Look at the range of ratings on their datasheets then calculate the minimum current yourself. |
| Audioguru:
You said "base" but for low audio frequencies we say "bass". You said "control" but we say "damping factor" where the amplifier has an extremely low output impedance so that it damps speaker resonances very well. It starts speaker cone movement and stops speaker cone movement when the music demands it. Some audio amplifiers have enough total negative feedback that their damping factor is more than 500 times then the output impedance is 8ohms/500= 0.016 ohms. Your amplifier has no negative feedback from its output so its output impedance is too high for a good damping factor and will sound muddy or boomy. |
| FriedMule:
Thank you a lot, ill try to calculate it:-) The funny thing about that amplifier is that id did never sound muddy nor boomy, it did more sound detailed in the upper Hz and lacked bass and had a bit hard time to kick when the pauke was hit and stopped. Other are talking about the amplifier, being to disckant in the sound and advices people to get more dark sounding speakers. EDIT: what I do not understand is why they claim it is a 60W when the transformer are a 300VA 26-0-0-26 with about 6A? |
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