SpeakerAddict is excited to bring you this series of high-power heavy duty passive crossovers optimized for use with professional audio speakers that use horn loaded compression driver tweeters. 

Depending on model, the HF compression driver/tweeter section offers varying levels of fixed attenuation, EQ and compressor type protection.  See the response charts for a general idea of what these do.  Note that 1 of the charts for each model is the raw response that may be misleading.  The other chart has the HF section boosted 10dB to better simulate what you will get as compression drivers are typically 10dB or more greater in efficiency than cone speakers.  From there you need to look at efficiency and response curves of the drivers you are using and meld the 2 together to find what will provide the flattest response.  

ATTENUATION – depending on model, there are varying levels of fixed HF attenuation.  Look at the difference in efficiency of the woofer & HF driver you are using and select a crossover that offsets that as closely as possible taking the actual response curves of drivers and crossover into consideration – Stated reference point is where the system would be flat in relation to the woofer if native curves had this amount of efficiency offset – stated EQ boost is the amount of upward sloping boost measured at 20Khz in dB above the attenuation ref point

EQ – depending on model, there are varying levels of fixed HF EQ are available.  All boost a bit at the top as compression drivers most typically roll off the top end. Use models with more of an upward HF curve (red) for compression drivers that fall off more on top.  Essentially you want this curve to be about the opposite of the response curve of your driver so the resulting system output will be closest to flat as possible.  Again, stated EQ boost is the amount of upward sloping boost measured at 20Khz in dB above the attenuation ref point

HF PROTECTION – Some models have what looks like a fuse on them.  This “fuse” is actually a light bulb that will light up to consume some current when pushing your system hard.  This effectively acts as a soft knee compressor and offers up to around 3dB of attenuation when fully lit which is = to half power.  In layman’s terms, variable and effective tweeter protection that you will never know is happening.  There is a resistor wired in parallel to the bulb which is why the attenuation level is less and slower than in other uses and also makes sure you will never fully go down in the event the bulb blows (extremely rare)