ACT-15 2Way 1.8Khz Pro Speaker Passive Crossover W Driver horn EQ attenuation

Description

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)
model
RMS/Max
Type
XO Freq - Slope
HP Attenaution
HF - EQ Boost
Bulb Protect
ACT-15
250/500 Watt
2-Way
1800Hz - 12dB
12dB - 5Khz ref
5dB
no
LX-1515
500/1000 Watt
2-Way/HP
2500 HP 18dB
10dB
no
no
LX-218
500/1000 Watt
2-Way
1300Hz - 12dB
7dB - 5Khz ref
no
no
SL15V2C
500/1000 Watt
2-Way
1700Hz - 12dB
10dB - 5Khz ref
3dB
yes
SL-12
500/1000 Watt
2-Way
2200Hz - 12dB
10dB - 5Khz ref
8dB
yes
SL-12V2C
500/1000 Watt
2-Way
1700Hz - 12dB
12dB - 5Khz ref
5dB
yes
MATRIX 1500
500/1000 Watt
2-Way
1800Hz - 12dB
10dB - 4Khz ref
6dB
no
LX-1515V3
750/1500 Watt
2/3-Way
500LP@6dB
1800LP@18dB
1800HP@12dB
8dB
no
yes