Yes - The point was the PSU that was mentioned won't even allow the 1.4Kw module to reach full power. Arguing that an amp that big is "too loud" is way OT, and silly IMOYou can't determine that 1000 watts is loud.
Besides, that's not the main point.
Thank youuu!
You can't simply determine that 1000 watts is loud.
Besides, that's not the main point.
The calculator may be realistic but sure seems like you're putting in numbers designed to make sure you need a lot of power. Let me see what I get for something resembling my situation...You should use a more realistic calculator. Here is just one example:
View attachment 420204
For program material with a CF = 20 it would be 1.8kW
And this consideration does not even take into account a room correction such as Dirac Live, which may also compensate for sinks!
You initially brought up SPL in relation to power, but it’s difficult to make meaningful comparisons here. For instance, what might require 1000 W for one setup could need only 6 W for another.If we are talking about steady state, then it seems like it should be pretty loud.
If we are talking about transients then I would not really worry about whether the supply can send endless current in, as there will be gaps in the output.
You chart has a 20 dB headroom number in there, so that implies that it is not steady-state RMS power.
So then the RMS power of 1400 may not be able to be met, but there might be peaks where the 1400 can be met… assuming that there are some capacitors in the device to supply it.
Try CF = 20.66.4W? I can get by with a baby amplifier apparently!
And what about the house curve?Try CF = 20.
And as I have already said, the influence of tone controls/DSPs should not be neglected.
The latter may play a role, but the true reason likely is that it simply doesn't matter in practice. 1400W vs 1200W is only one measly dB more SPL, and 2Ohm speakers are not very common. IMHO this is a complete non-issue. A bigger concern (in relative terms), mentioned in a previous post, is that the Hypex supplies scale output voltage with mains voltage and that may cause a much bigger range of available max powers. Especially Japanese customers with their 100V lines, sometimes even 90 only, will have a disadvantage. Does it really matter in practice? I highly doubt it.Does anyone know why Purifi recommends the Hypex 1200W power supply, knowing it cannot provide the full rated power of 1400W into 2 ohms of the 9040BA module? With this Hypex power supply, the 9040 is able to deliver a maximum of 1050W to 1100W into 2 ohms. Why not recommend another one, like the Microaudio 1500W PS, able to deliver the spec'd 1400W?
Does Purifi have some form of a contractual relationship with Hypex to only use their power supplies, maybe due to the former history of the design engineers with Hypex?
Wow - I'd call that an issue if not clearly noted. Does it change from 110/120 to 220/240 as well? Or only below 110vac? Isn't the point of "universal input voltage switching PSU's" to be capable of outputting stable voltage @ amperage within the specified input voltage range?The latter may play a role, but the true reason likely is that it simply doesn't matter in practice. 1400W vs 1200W is only one measly dB more SPL, and 2Ohm speakers are not very common. IMHO this is a complete non-issue. A bigger concern (in relative terms), mentioned in a previous post, is that the Hypex supplies scale output voltage with mains voltage and that may cause a much bigger range of available max powers. Especially Japanese customers with their 100V lines, sometimes even 90 only, will have a disadvantage. Does it really matter in practice? I highly doubt it.
The 46V rating is proportional to 230V,not to 115V and also proportional to the fluctuations of each typical voltage.Yes, just doing the maths with your example. The nominal Hypex supply voltage for rated 46v output voltage is 115v. If this reduces to 90 volts thats a 21% reduction. Output voltage would be only 36volts. This means the 8 ohm rating for the 9040 module drops from 750 watts to about 480 watts.
As for the unregulated supplies, linear transfromer supplies have always been unregulated (scaling with mains voltage) and nobody ever made a big deal of it. Also, they tend to have less load stiffness, showing more load dependency even with constant mains voltage. No big deal either.
The difference would be small any way.No. The nominal 46v out is 230v on the high mains range and 115v on the low mains range. It is a manual jumper selection on the psu. I was of course assuming that if you are using in Japan at 100 volts (nominal) you would be using the low range.
Or get a PSU of sufficient power capabilities?The difference would be small any way.
We also have to consider any voltage drop near the PSU's limit,as always.
The 46V rating is proportional to 230V,not to 115V and also proportional to the fluctuations of each typical voltage.
Exactly.No. The nominal 46v out is 230v on the high mains range and 115v on the low mains range. It is a manual jumper selection on the psu.
Or get a PSU of sufficient power capabilities?