Transformer used implications to output power?

[AndrewT]

The transient peaks come from the smoothing and decoupling capacitors, not from the transformer.
The transformer recharges the capacitors for the next transient that could be tens, or hundreds, of micro-seconds later, or maybe minutes later!

 

[chienmort]

this seems wrong to me.

If the amplifier is rated as 50W+50W into 8+8ohms, then when bridged it is indeed 100W into 16ohms. Bridging gives double the power into double the impedance, no extra power is magically created.

The 100W into 4ohms seems to be for a paralleled output, not bridged. See a pa100 chipamp and compare to a ba100 chipamp to see the differences.

Does the user manual show an arrangement for paralleling the outputs?

 

[chienmort]

When you bridge and amp or more correctly amps, the maximum output is 4 times the power of one amp. However most power supplies are limited to twice the single ended output of the amp. So a 50 watt per channel stereo amp will be limited to 100W when bridged.

 

[AndrewT]

When you bridge and amp or more correctly amps, the maximum output is 4 times the power of one amp. However most power supplies are limited to twice the single ended output of the amp. So a 50 watt per channel stereo amp will be limited to 100W when bridged.

No,
a bridged pair of amplifiers gives double the power into double the load impedance. No extra power is magically created.
If you have a 50W into 4ohms amplifier and bridge it with another 50W into 4ohms amplifier, the best you can get is 100W into 8ohms. Exactly the same total power from the two amplifiers used singly as from the pair of bridged amplifiers.
You do not magically get some fictional 200W from two 50W amplifiers.

 

[DF96]

Some 50W into 8 ohms amplifiers can also provide nearly 100W into 4 ohms. Bridging them will give 200W into 8 ohms, and so confuse newbies.

 

[somorastik]

I checked the datasheet from ST Microelectronics and the amp is stereo 50W/6 Ohm or 40W/8 Ohm.

 

[DF96]

So, given a suitable power supply, if you bridge it you would get 100W into 12 ohms or 80W into 16 ohms. Or parallel it to get 100W into 3 ohms or 80W into 4 ohms. Didn't someone say that this amp is already bridged? If so, you can't bridge a bridged amp but you can parallel or bridge a paralleled amp and parallel a bridged amp.