Siren plus power amplifier problem
2, to get the horn match, you can put two 16 ohm speakers in parallel, you can match with the amplifier. Otherwise you need to select the output impedance of 16 even amplifier circuit.
1, if you add a power amplifier, it is best to get the input signal at the pre-stage, so that the signal fidelity is better, if you must get the signal in the final power amplifier, you need to increase the attenuation matching circuit.
3, the amplifier output power, mainly depends on the power supply voltage and the end of the power loss of the attack and tube power, can drive much of the speaker, according to their own needs to design!
