LDS 15/6 Question

[rpsands]

What crossover and horn did you wind up using?

 

[Top_Ten]

What crossover and horn did you wind up using?

I went with the 1200 hz crossover on Don's recommendation. I realize that is contrary to some of the advice here, but Don made a convincing case for it. Frankly, I'm not sure I'm discerning enough to tell the difference anyway!

No horn -- just the 15" and the 6.5" mid.

 

[Blues Cat]

I went with the 1200 hz crossover on Don's recommendation. I realize that is contrary to some of the advice here, but Don made a convincing case for it. Frankly, I'm not sure I'm discerning enough to tell the difference anyway!

No horn -- just the 15" and the 6.5" mid.

I believe mine is x'd over similarly 1100hz and I like it. You're still getting content lower than 1100 thru the mid but it's attenuated a little. The KLLF15" has a nice slow roll off.

 

[JimmyM]

part of the reason for using that frequency, at least according to what duke lejeune told me (where's he been lately?), is that the radiation pattern of the woofer at certain freqs will match up to the mid driver's radiation pattern at the same freq.

 

[KJung]

part of the reason for using that frequency, at least according to what duke lejeune told me (where's he been lately?), is that the radiation pattern of the woofer at certain freqs will match up to the mid driver's radiation pattern at the same freq.

Hey Jimmy,

The logic of going with a somewhat lower crossover (700 or 800hz) is that the more upper midrange you can send through that small cone, the wider, more even dispersion you will get on stage, since higher frequencies coming out of a large cone like a 15 tend to be more tightly focused and more directional than those same frequencies coming out of a smaller cone. More of an issue with a 15 than a 10.

However, there is a 'price to pay' also, since the upper mids coming out of that very clean, small, powerful mid driver have a different nature and tone to them (just like upper freq's sound different coming from a horn type tweeter versus a small paper cone driver). So, it is a bit of a trade-off. Some dig a touch more of the lower end of the upper mid frequencies coming from the top end of the driver, and will give up a little on dispersion nearfield. Others want to use that mid driver to the maximum (i.e., 700hz or so) to minimize beaming as much as possible, and also generating that very clean, pure upper mid response to the maximum level possible.

I've heard both crossovers. I myself prefer the crossover set at the slightly higher (1.2K or so) level tone-wise, even at the expense of a touch more focus on the midrange response.

 

[JimmyM]

dig.

 

[rpsands]

I actually think that most players will prefer the sound of Ralf's crossover (probably 7/10). He gets a bad rap from the crossover "experts" on the forum but he's clearly put a lot of time and testing into it to find something that sounds great to him (and a large proportion of people).

I do tend to prefer the "studio monitor" type quality to the higher crossover, but I think I'm probably in the minority. The difference is fairly subtle, but I think it gets more noticeable the louder you get and the further from the cab you play. That said, I haven't heard one of Ralf's first hand so it's tough to say for certain

 

[Top_Ten]

I actually think that most players will prefer the sound of Ralf's crossover (probably 7/10). He gets a bad rap from the crossover "experts" on the forum but he's clearly put a lot of time and testing into it to find something that sounds great to him (and a large proportion of people).

I do tend to prefer the "studio monitor" type quality to the higher crossover, but I think I'm probably in the minority. The difference is fairly subtle, but I think it gets more noticeable the louder you get and the further from the cab you play. That said, I haven't heard one of Ralf's first hand so it's tough to say for certain

I'm about as far from an expert as it is possible to get, so I figured if I was trusting Don to build the cab, I'd trust him to steer me right on the crossover too. As I said above, I doubt I'm discerning enough to tell the difference anyway! I do appreciate the additional info and perspective from everyone here, though -- thanks!