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GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm
I see there is a recommended vented closure with volume of 0.1 cubic foot but what is the size of the port?
I would use a 1 inch port that is 1-5/8 inches long. That will tune the box to 90 Hz.
Date published: 2016-04-14
thinking of using these for cube speakers in a home theater...am I crazy using these? Would you recommend sealed or vented?
These should work fine for that application. I would recommend sticking with a sealed design, probably ~0.1 cubic foot which will extend to about 100 Hz.
Date published: 2016-01-13
I'm want to replace ALL 18 drivers in an old pair of Bose 901(IV) cabinets without going broke. Old driver frames are 4 hole/4.5" side to side overall frame width. Mounting holes are approx. 3.25" apart. Would these fit and do the job? Thanks, Alan
We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, firstname.lastname@example.org or 800-338-0531 x1.
Date published: 2015-12-07
Is there a frequency response plot available for this speaker? Also, the baffle cutout diameter is given but not the bolt hole center diameter. I measure it to be 4 21/32. Is there a different number that I should use?
Unfortunately we do not have a frequency response plot available for this driver. The mounting hole spacing is 4-3/4" on center. The outside edges of the holes are right at 5" and the frame size corner to corner is 5-3/16".
Date published: 2015-08-05
What is the effective piston area for this driver?
The Sd of this driver is 62.04 sq cm.
Date published: 2015-04-22
I'm replacing a driver for a Polk Audio model RM40T. This'll be my first endeavour. By all means, it seems it will be a perfect fit, but I don't know if it will have a noticeable difference in quality of sound between a poly cone and a paper cone, etc
Poly and paper cones share a lot of similarities in terms of tone, damping characteristics, etc. The difference in drivers will have more of an impact on sound than just the cone material alone. Please contact our tech support for more help with this question, email@example.com or 800-338-0531 x1.
Date published: 2015-04-17