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View Full Version : What would you set the HPF and slope on these?



phish368
11-15-2009, 04:13 PM
What would you set the HPF and slope on a tweeter that is rated 4 KHz - 25 KHz 3 dB ?

Thanks!

Upgrayedd
11-15-2009, 04:14 PM
need moar specs

eharri3
11-15-2009, 10:38 PM
What it's rated, ie published requency response figure, does not = what it plays well at. The configuration of your system, positioning, and the amount of power applied to the driver come into play .

phish368
11-16-2009, 01:19 PM
Sorry about that.

Basically what I am trying to do is to take JL Audio VR-650csi components, removing the included passive x-over and go active off of the Alpine CDA-9887 3-way feature. I'm doing this mainly because the tweeters are in the A-pillars and the drivers are in the lower part of my doors and the imagining ***** this way. I can't make any major changes to the car so I have to keep the speakers where they are.
I will be driving them off of a JL Audio 300/4 amp which is rated for 75x4.

Here are the specs of the specific JL Audio VR series Tweeter (VR075-CT) in question.

Continuous Power Handling: 50 Watts (with appropriate crossover)
Peak Music Power: 125 Watts (with appropriate crossover)
Rec. Power Range (per channel): 2 - 50 Watts
System Efficiency: 89 dB @ 1W/1m
95 dB @ 1W/0.5m
System Nominal Impedance: 4 ohms
System Frequency Response: 4 KHz - 25 KHz 3 dB

eharri3
11-17-2009, 12:51 AM
OK now can you articulate exactly how going active will cure the problems caused by your speaker placement? Maybe I'm a tard but I don't exactly understand your goals.

Rich B
11-17-2009, 12:53 AM
OK now can you articulate exactly how going active will cure the problems caused by your speaker placement?


Probably by using time alignment, which can only be done on an active set up.

phish368
11-17-2009, 10:27 AM
Probably by using time alignment, which can only be done on an active set up.

Correct. Time Alignment which is built into the Apline CDA-9887