Great Video, I hate it when manufacturers fudge specs to make things look good, I thought Sure was a better company than this, who uses a 3ohm speaker, a 4ohm might drop to 3 at some lower frequencies but not continuously, can you recommend a good mono class D amp for a subwoofer please
hah, yeah, I actually looked at a few others after this and didn't make videos. I haven't found anything great in this really low cost area but it might be time to look again since there are tons of new models out now. I ended up with a Dayton 500W plate amp with DSP. Which is better and has enough power to be loud enough for home needs, but it is also expensive, and certainly is short term 500 watts not continuous.
Why not try this amp with a more capable 47V DC/10A power supply instead of a 36V/4.4A block? I bet you will have a much higher power point of distortion.
The maximum specified power supply for the board is 36 VDC. I have done some work on the Lepai/Lepy amps from Parts Express and well I should make a video about turning the voltage up on those. Hint, it didn't go well.
Short answer: Current. Longer Answer: Ever look at an un-interruptible power supply (UPS) and notice the rating is something like 1000 VA and the watt rating will be something lower like 600 watts? When power factor is low current is higher which means less equipment can operate on the same circuit breaker. So, if you have a lot of very low power factor equipment on a circuit you can have situations where current will trip the breaker even if wattage is well under what the "circuit" should be able to handle. This can also impact cost, even if it isn't costing you money in your electric bill for residential customers. Low power factor costs money for larger size wiring and larger circuit breakers for the same equipment and same power.
Great Video, I hate it when manufacturers fudge specs to make things look good, I thought Sure was a better company than this, who uses a 3ohm speaker, a 4ohm might drop to 3 at some lower frequencies but not continuously, can you recommend a good mono class D amp for a subwoofer please
hah, yeah, I actually looked at a few others after this and didn't make videos. I haven't found anything great in this really low cost area but it might be time to look again since there are tons of new models out now. I ended up with a Dayton 500W plate amp with DSP. Which is better and has enough power to be loud enough for home needs, but it is also expensive, and certainly is short term 500 watts not continuous.
Why not try this amp with a more capable 47V DC/10A power supply instead of a 36V/4.4A block? I bet you will have a much higher power point of distortion.
The maximum specified power supply for the board is 36 VDC. I have done some work on the Lepai/Lepy amps from Parts Express and well I should make a video about turning the voltage up on those. Hint, it didn't go well.
Why does power factor matter for residential users?
Short answer: Current.
Longer Answer: Ever look at an un-interruptible power supply (UPS) and notice the rating is something like 1000 VA and the watt rating will be something lower like 600 watts? When power factor is low current is higher which means less equipment can operate on the same circuit breaker. So, if you have a lot of very low power factor equipment on a circuit you can have situations where current will trip the breaker even if wattage is well under what the "circuit" should be able to handle.
This can also impact cost, even if it isn't costing you money in your electric bill for residential customers. Low power factor costs money for larger size wiring and larger circuit breakers for the same equipment and same power.