[Hifisound]

Dr Geddes has added polar response of LSR308 to the polar map software (and also of Behringer 3031A)

But, doesn't look good , has the usual narrowing near crossover.
The Behringer 2031A still looks very good in comparison. Maybe the LSR305 is better...
3031A also looks better than LSR308

On a side note : I wonder, what if the Behringer engineers had just refined the the 203x series and taken it to a new level (instead of launching some other or newer variants)

 

[Bill Fitzmaurice]

But, doesn't look good , has the usual narrowing near crossover.

FWIW the narrowing of the polar response of any driver as frequency goes up is the reason why multiple drivers are used. By and large the frequency at which off-axis response drops by a target figure is how the crossover frequency is arrived at.

 

[Hifisound]

FWIW the narrowing of the polar response of any driver as frequency goes up is the reason why multiple drivers are used. By and large the frequency at which off-axis response drops by a target figure is how the crossover frequency is arrived at.

But then isn't the off axis response nicely matched for the Behringer 2031A (listed as only Behringer) as shown in the polar map software ?

Attached images taken from Dr Geddes's polar map software :

 

[Bill Fitzmaurice]

But then isn't the off axis response nicely matched for the Behringer 2031A (listed as only Behringer) as shown in the polar map software ?

Better, yes. But it's only an issue if your LP is sufficiently far enough off axis to place you in the zone where things get ragged.
The reason for poor polars around the crossover frequency is running the crossover frequency too high, and the usual reason for that is good old fashioned money. Tweeters capable of going lower generally cost more.
In this case you can make the argument that the Behringer gives you more for your money, and where the off-axis response is concerned that appears to be the case. But I wouldn't base a purchase on that alone. It's just one of a number of factors that need to be considered.

 

[Hifisound]

Better, yes. But it's only an issue if your LP is sufficiently far enough off axis to place you in the zone where things get ragged.
The reason for poor polars around the crossover frequency is running the crossover frequency too high, and the usual reason for that is good old fashioned money. Tweeters capable of going lower generally cost more.
In this case you can make the argument that the Behringer gives you more for your money, and where the off-axis response is concerned that appears to be the case. But I wouldn't base a purchase on that alone. It's just one of a number of factors that need to be considered.

Agreed. The reason for comparison is because 308 is also a waveguide based new design from JBL (similar to their M2)

And yes, that wouldn't be the only factor. Which is why I also mentioned that Behringer should have just looked at refining the 203x series (removing whatever flaws like diffraction etc exist) while retaining the positive points...

 

[SyntheticShrimp]

Here is another contour plot of the LSR308s. It corroborates well with Geddes's. The LSR305 is more constant. Plots for it also can be found in that link.