How important is Power-Response and IRR relative to linearity?

Hey guys,
currently I am designing a crossover and stumbled upon a hurdle, that I can't find specific opinions on.
I only found out about the consensus that direct sound power is not to be neglected.
Please look at the pictures provided to understand my problem.
I designed a crossover that is quite flat on-axis but has quite a dip in Sound-Power and In-Room-Response
1684957977071.png



Now, when I adjust the inductor in the tweeter, Sound-Power, In-Room-Response and even directivity enhance by quite a bit but the general response isn't as flat anymore.

1684958071730.png

Is there a general design consensus about what to do in a case like this? Might a slight bump in crossover region even be preferred?
Thanks for all help upfront
 

GM

Member
Joined 2003
Historically, with horns it's flat on axis and toe-in/out as required for best overall in room response and in my relatively few 'adventures' in complex multi-ways it's 'what's good for the Goose is good for the Gander' (to do the same), though a recent comment on my way was to have a 'rising on axis response' and from further back it was the 'average', so apparently whatever 'floats your boat' (your call). ;)
 
That's interesting. From everything I've read I came to the conclusion that a declining on axis response would be preferred by many. I guess ill just order both inductors since they're not too expensive and see what I like better.
 
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GM

Member
Joined 2003
Dunno, haven't ~followed this forum enough till just recently to form many long term opinion(s) and frankly didn't/wouldn't do a basic design using passive XOs based on what it has evolved to over time now that relatively inexpensive DSP can easily do it all to a high degree of (in room) accuracy.
 
You are on the right track, but did you consider other solutions, like adding a waveguide to your tweeter? That way you get the directivity match between woofer and tweeter which certainly solves the problem. My humble opinion is that the on axis bump at 2k in your 2nd Xover is just as non desirable as the sound power bump at 3k in your first.
Get your inspiration here, you have the tweeter already, if I’m not mistaken. Or get challenged by some recent experiments of mine, attached (RS180S with SB in the WG300). These are not done yet, but you get the idea.
 

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The design is just a relatively quick sketch up from simulated responses. Haven't got any drivers in hand actually. I ditched the idea of a waveguide since it would make the speaker bigger than I desire it to be, but it might be worth it. These are supposed to be used for nearfield listening mainly on my desk.