Free Electronic Circuit Schematics » Audio Power Amplifier

Audio Power Amplifier Circuit with 60 Watt 8 Ohms

admin — Mon, 18 Jan 2010 15:56:28 +0000

The Circuit
Note that no output short circuit, so when the speakers will be shorted, while the amplifier is working (with signal amplifier), there is a real danger that the transistors destroyed. Since this amp was built commercially, the savings were worth the risk – most of these amplifiers were installed in the speaker box, so short selling is unlikely (unless you short the speaker’s voice coil as) a few times. Because the cost of the equipment used (minimum), it is a cheap amp to solve, even if you are blowing air.

Basic Specifications

The following shows the basic measurement results …

Gain	27dB
Input Impedance	24k
Input Sensitivity	1.22V for 100W (8 ohms)
Frequency response ¹	10Hz to 30kHz (-1dB) typical
Distortion (THD)	0.04% typical at 1W to 80W
Power (42V supplies, 8 ohm load) ²	90W
Power (35V supplies, 8 ohm load) ³	60W
Power (35V supplies, 4 ohm load)	100W
Hum and Noise ⁴	-73 dBV unweighted
DC Offset	< 100mV

60W audio power amplifier circuit

Reduced the value of the Class A-based resistance to 560 ohms **
Increased the value of the bootstrap capacitor 100uF
Decreased Stabilization 100pF caps on (she was formerly 220pF)
Added the output inductance and damping resistance (see News)
** It is conceivable that with a few transistors, the value of 560 ohms is not correct. If this is detected, you should “optimize” this resistance to at least maintain DC offset. If you really wanted, you could even with a 2k trimpot (), and set it for at least DC offset. It is best to wait until the first temperature stable, but it will not change much anyway.

Apart from these changes, the amplifier is loaded with highly original and provide a + /-35V (voltage), as indicated at 70W into 8 ohms give completely satisfied. In his life, many of the above mods have done, because I never had the schedule when I needed him to find, as often as it went, like me! It is an evidence of the fair amplifier that can handle all types of resistor and capacitor replacements are made, and it still works well.

The noise and distortion figures are a bit pessimistic – there is so little distortion at 1V (20V or for that matter) that my major problems for the disruption, has a readable measurement. The oscilloscope output shows that most of what I see is noise – the integration of the production (my scope is that it is not) to eliminate the noise shows very little at all.

50W Audio Power Amplifier with IC TDA1514A

admin — Sat, 10 Oct 2009 04:02:28 +0000

50 Watt apmplifier with TDA1514A

Here is circuit audio amplifiers for car, which use it only number Transistor Circuit of IC, simple Circuit (and Top Popula)
Use TDA1514A transistor at low cost. It best Idea Circuit.

It’s receive a handful of additional external device in comparison to the generic diagram. Remember that there’s a simple HF filter on input signal. This IC supports mute and stand-by modes. I have not built this one, so I have get no suggestions concerning practical construction.

Remark:
Supply Voltage = +/- 30V
Ur = 0-1V : Stand by
= 2-4.5V : Mute
= 6-7V : Play

400Watt Audio Power Amplifier circuit with MOSFET BUZ902DP

admin — Tue, 18 Aug 2009 04:05:37 +0000

400W audio power amplifier circuit

If you like in the sound system or sound this circuit will should like you , This amplifier has two completely separate mono amplifiers with each channel has its own power supply to the order of zero channel crosstalk, a common phenomenon in amplifiers have the same food.

To view the full performance of each supply transformer should be evaluated at 40VAC – 0 – 40VAC at 640VA.

Unlike many models of capacitors is a reservoir to supply the peak currents, I prefer the power transformer in a much faster transient. BUZ902DP Although the specifications are rather modest,

if they can hear you now to experience a large reserve of power available and never any reason to worry that something to do than drive a large number of amplifiers aloud. You do not hear nothing but the truth without distortion at all levels, and I can assure you that this amplifier is required to provide the best features coupled.