Big, strange WAW project

[planet10]

the Peerless is only 4.1dB more sensitive than the Pluvia

Typically you want 2-4 dB depending on the room. 6dB requires a really large room and the speaker no where near the walls.

I typically target 3dB.

And keep in mind every dB you raise the on-axis to compensate for baffle step you also increas (in excess) the room response so there is no “perfect".

dave

 

[Wootoo]

It's also possible to make a 2nd input for the woofer with a slightly different x-over to gain 3dB. But that is completely up to you if you want more low end.

But let's not get ahead of ourselves and see what the simulation does.

 

[lewisb]

Ah okay, thanks for the insight @planet10 . I can't remember where I got the 6dB figure from but good to understand that it's more complicated than a blanket rule

 

[planet10]

6 dB is the actual amount if measured in a place with no surfaces nearby, something that does not happen in real life. Even ouside the speaker is usually sitting on the ground. These surfaces reduce the amount.

dave

 

[GM]

Typically you want 2-4 dB depending on the room. 6dB requires a really large room and the speaker no where near the walls.

Indeed, so for DIYers, best overall IME is do the full 6 dB (or more IME with lossy rooms) if practical from a size/$$ POV and use DSP to frequency shape it in room or if have multiple switchable settings, then shape for various music genres and one for HT.

 

[lewisb]

Hey @Wootoo , I just wondered if you've had a chance to have a look at the sim yet! Not to rush you at all!

 

[Wootoo]

Hey @lewisb just having a look at it now. Made an frd file from the data provided by the sheets but the response is looking terrible 😂

This is going to take too much of my free time I'm afraid and I don't have that many.... maybe someone who's more into full range drivers can help out?

 

[Wootoo]

This is the best i can simulate the Pluvia with the data from markaudio. adding the woofer creates a load of phase issues.

looking at the frequency response.... this is terrible...

made the frd and zma files with SPL Trace inside Vituix.