Safe Crossover Frequency

[Clintonl]

Hi Guys,

I've got a pair of German Maestro MS6508 and just wondering if it's safe to run them down at 2000hz 24db. I've found a bit of conflicting info for them and not sure what to make of it.







In those pictures it says the crossover frequency is at 2000hz although the recommended min frequency of the tweeter there says 2000. Then a third outlier pic saying they're high passed at 3.3k.

Cheers

[SublimeZ]

My understanding is 2x fs is safe. If it were me, would start at 2500Hz.

[nadams5755]

2x fs is safe, i usually do 2.5-3x fs if they sound rough at higher volumes (for midranges and tweeters).

some recommend fs/qts for minimal usable frequencies. however, the qts isn't available for these tweeters. with the mids though, it'd be 71hz.

[Clintonl]

Thanks for the replies. Found the QTS here, also found another datasheet says that minimum is 1600hz on the tweeter? Getting alot of conflicting info.

[nadams5755]

Ask the manufacturer to clarify their recommendation, but it seems like 2500hz even if the 1100hz fs is correct.

[Captain Buff]

DC resistance is '6th'...that's different...



Go to the manufacturer website only for information, I doubt all these came from germanmaestro dot com
However 2-3 x Fs is a good SAFE place to be; especially with expensive gear you don't want to explode. That puts you at about 3kHz plus...

Why do you want the tweeters to play so low?

[Clintonl]

That picture was out of a manual i found online. Have emailed them for clarification though. Looking to play them lower as my mids roll off pretty hard when running higher.

[SublimeZ]

The 3300Hz is recommended starting point with the matching woofers.
We can't tell you what is "safe", too many variables (power and volume discipline on top of unknown driver)
However, this chart would lead me toward trying 2k if needed

[Captain Buff]

That final sentence of 'x-over points below 1,600 Hz the tweeters applied SPL power-load has to be lowered in an appropriate manner' both makes me think that you could be defeating the point of what you are trying to achieve if you have to lower the power, but also exactly how much power would you remove in each specific case...? I am aware that it states 1.6 kHz; but I would think that the same principle would apply?

So many unknowns around a piece of equipment that you really don't want to screw up (and can easily be screwed up)...I just wouldn't do it mate. Just IMHO man...if you want to then have at it

[Justin Zazzi]

Looks like the first picture is recommending the filters to use if you have an active dsp,
and looks like the last picture is what the factory passive crossovers acoustic crossover is (not the electrical crossover performance)
and looks like the chart with the MT40 tweeter is a warning about 1,600hz being the absolute limit and a warning about power handling or distortion.

But yeah, I'm with you. Ask the manufacturer because this is a little tricky to read!