neće koštati isto-kreni samo od kapaciteta u napajanju,a onda razmisli o hladnjaku pa i cijeni transformatora. nije sve u cijeni poluprovodnika,otpornika i par kondenzatora na pločicama. mislim da dobra većina ovde na forumu nikad nije čula kako Boro gore reče ZDRAVIH 300W na kutijama za razglas. sa manje od kilovata ukupne snage(aktivna skretnica i četiri kanala pojačala) se radio koncert za petsto i više ljudi na otvorenom prostoru! lično bi prije radio četiri kanala od po 250W umjesto jednog od 1kW,pogledaj ovo i isčitaj
http://sound.westhost.com/bi-amp.htm a posebno dio oko
"1.4 - Actual vs Effective Power
If we assume that our 100 Watt amplifiers will be handling exactly the same peak amplitudes with typical program input, then we have a total of 200 Watts for the combined program material. So, where does the magic come into this? This amp combination will sound (and measure) as if it were 400 Watts - twice as much "effective" power as there is real power. For this to make sense, we need to back track a little.
Imagine a sine wave signal of 100Hz at an amplitude of 28V RMS. For an 8 ohm load, this equates to about 100W (98 actually). The same amplitude at 1000Hz will be exactly the same power. Now add the two signals together, in the same way that signals add together in music. We are interested only in the peak amplitude, the RMS value indicates that the power is only 3dB higher, but it is only when an oscilloscope is used that the true picture emerges.
We will now see a low-frequency waveform, with a higher frequency waveform superimposed - the high frequency signal will be riding up and down the path of the low frequency signal. If we were to perform a calculation (or simply measure the combined signal with an oscilloscope), we will see that the peak amplitude has doubled. The effective RMS value (most multimeters will get this wrong unless they are true RMS types) is 40 Volts, and this would imply 200W. Although this is the real RMS voltage, it totally underestimates the amplifier power needed to reproduce it cleanly. An oscilloscope shows 80V peak for the same waveform, so the amplifier must be capable of passing an 80V peak signal - a 400W amplifier."
sad skontaj zašto je bolje četiri kanala uz aktivnu skretnicu nego jedan klot od 1kW,nije sveto pismo.
"nikad se ne raspravljaj sa budalom -
spustiće te na svoj nivo i pobediti
iskustvom"
Re: Ponuda za pravljenje pojacala
Registrovani: 1 ( Nebojsa Milanovic )
Re: Ponuda za pravljenje pojacala