Efore MFA160 24v6a Heat doesn't seem to be the limiter. It gets hot though. Sometimes the psu goes into protection first. So I think its the current protection on the amp and psu are a close match.
Not too weird
Id expect the power supply to shut down.
1 ohm is a ton of current.
For a single driver not much benefit.
Power supply is getting hammered.
Switch mode can do current but not
to great at it
Guess the 70's add copy lives on.
Low impedance doesnt give " more power"
it uses more power.
Numbers look good in the add though
Id expect the power supply to shut down.
1 ohm is a ton of current.
For a single driver not much benefit.
Power supply is getting hammered.
Switch mode can do current but not
to great at it
Guess the 70's add copy lives on.
Low impedance doesnt give " more power"
it uses more power.
Numbers look good in the add though
IF TI suggests 3.2 ohm minimum load for a single 3116 and 1.6 for two in parallel (just read the datasheet), Logic/Math says you need three in parallel for 1 ohm.
Can use just two?
Yes, you can.
You can also drive with the handbrake engaged (I have a couple times).
Simply "not good Engineering"
Can use just two?
Yes, you can.
You can also drive with the handbrake engaged (I have a couple times).
Simply "not good Engineering"
The discussion appears to assume a perfect power supply. With such a low impedance load, I wonder if the power supply is limiting the output current and protecting the amplifier?
No, 4 vintage 4 ohm AD8066 philips woofers which are setup in a 1:3 master-slave config with the master being servo controlled .
The AD8066 master driver equipped with a StarBass accelerometer :
I eventually choose to go with 4 separate 3116 pbtl amps to drive each woofer individually:
In party mode the 4BMH6D module consumes upto 26A @ 24V which is equal to what it would take on a 1 ohm load.
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Fair point. But thinking broadly, there are three resistances in series here. There is the internal resistance of the power source, the series resistance of the amplifier and the one ohm speaker. So if at maximum output, the combined resistance of the power source and the amplifier is (for the sake of argument) a mere one ohm, then half the power is being dissipated there instead of in the loudspeaker. Wouldn't it work better to use one coil of the speaker and present a 2 ohm load?
2 fast bjt may work better as the Tpa chip has several amps of current to drive it.
A .33 ohm resistor base to emitter should work.
A .33 ohm resistor base to emitter should work.
BJTs switching with 400kHz?
Expected performance will be subtimal.
And these BJTs will blow at the very first output short.
Not sure if I understand you correctly, the drivers used are 4 ohms single coil woofers ?
who wants to reproduce the test of driving the tpa chip with one ohm load?
Maybe some class D opponent who wants to see a class D chip die?
Maybe some class D opponent who wants to see a class D chip die?
Obviously this chip is not specifyed for 1Ohm load.
But with the help of its rugged overload protection it will not die - but heavily distort or shut down.
But with the help of its rugged overload protection it will not die - but heavily distort or shut down.