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GRS 4PF-8 4" Paper Cone Foam Surround Woofer
Going to build a Bluetooth boom box with these and some GRS tweeters. What size box and port should I build for decent bass? Or should I run a sealed cabinet. Plan is to build it out of 1/2" baltic birch plywood.
A sealed .09 cubic foot box will provide the flattest response but will roll off a little earlier. You can go up to a .25 cubic foot vented cabinet and and tune it to 80 Hz, that will provide a peak at around 100 hz which will make the bass presence a little more apparent though. That would require a 1.5 inch diameter by 1.5 inch long port
Date published: 2016-02-04
3 3/4 cutout are these going to sit flat on the baffle? or the going to sit up a little? and are they supposed to sit up?
With a 3-3/4" cutout the frame will sit slightly proud of the baffle but it will just less than 1/8".
Date published: 2014-12-11
Good Day, My question is how would a pair of GRS 4PF-8 4" with a 1/2 Mylar dome tweeter speaker work well for a in wall center channel speaker?
This should work well as long as there is a crossover involved. This will depend on the safe crossover point for the tweeter you plan on using.
Date published: 2014-11-28
I'm going to use four of these four a 8 ohm load series/parallel. And i'm going to use a piezo tweeter can i use in-line resistor for the tweeter.and let the woofer run full range. Im just asking of a simply way and cheapest way of a crossover. "Thanks"
For your application, it should be sufficient to just use a resistor on the piezo element and let these drivers run full range. However, keep in mind that the capacitance of the piezo element works with the resistor to define an RC high-pass filter, so the actual high-pass frequency of the tweeter will also change with different resistor values. I would start with a 10 ohm and a 20 ohm resistor, then use an L-pad before the tweeter and filter resistor to set the appropriate tweeter level.
Date published: 2014-11-20
Hello! The cutout diameter says 3.75 on the baffle . Can i get buy on a cutout 3 5/8 diameter on this woofer?
Unfortunately no, the smallest cutout this woofer will fit in is 3-3/4".
Date published: 2014-11-19
I'm looking to build a dodec speaker (omnidirectional 12 drivers). Would this speaker be a better choice than the GRS 4AS-4?
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Date published: 2014-10-22