Translation to English please. Any audio amplifier output produces a buzz when its signal source is turned off if its input cable is not a shielded audio cable. Ordinary input wires pickup mains hum.at any audio inter AMP (PC =OFF , AMP=ON)little buzz is exist
Your schematic shows the same 12W low power amplifier shown in the datasheet. If it has a TDA2030A that has a maximum allowed supply of plus and minus 22V then its output is a higher power that is not shown on the datasheet because the IC gets too hot.my power need =maximum power by single TDA2030A WITHOUT any transistors in circuit
Mr.Audioguru : please write frame of "power output AMP CLASS AB" again.
please see again PNG file attached and answer question
75 ohm cable is big, stiff and is made for TV. We use small and flexible shielded audio cable.I used coaxial 75 ohm shielded for audio signal inter but this wire near mains power cable of psu of my pc !!
We do not know the output level from your computer so you should adjust the gain so the amplifier can produce its maximum output.what is best value for marked items in above attached png file? I use this AMP FOR a personal computer - DVD PLAYER for driving a coaxial 4 ohm 35w SPEAKER (music and regular use)
The output impedance of a modern amplifier is extremely low so it can damp resonances of a speaker. An undamped low frequency resonance sounds "boomy", a high frequency resonance sounds bad.I do not reason of do not use fuse series speaker ??(decrease power )
The bridged TDA2030A amplifier produces 34W (without any detailed spec's) into 8 ohms with a 32V supply.Can I series a 2ohm resistor with 6ohm Speaker because made 8ohm Speaker ?
(for Bridge Tda2030a in datasheet of tda2030a)
When the power transformer and ICs get hot but the amplifier is not playing and also when playing the sound is distorted then the amplifier is probably oscillating at a high frequency.
IC's and transformer not hot (zero) in not playing state.what percent %oscillation can hoting IC's.
beforehand add second IC , distoration is egregious at 70% volume . I change 680ohm R2 to 2.2k ,10uf C13 to 100uf for decrease Gain In Bridge .(thrid attached file )
this changes is reason of weaker sound quality of bridge 36w compare to single 18w state ?
what is role of R14 , R7 in bridge state ?(thrid attached file)
by Jake Hertz
by Jake Hertz
by Jake Hertz
by Jake Hertz