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GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm
I'm thinking about putting two of these on a Lepai LP-2020A+ for casual listening of rap/dubstep. I'm a car audio guy, never done anything outside of a car, so I want to know would this be better sealed or ported? And if ported, is 95 HZ what I tune at?
I would recommend porting these, using 0.23 cubic feet for each with a 1" diameter, 1/2" long port (basically a hole in the box if you use 1/2" thick wood for construction). This will tune the box to 88 Hz and give you a bit of a bump around the tuning frequency giving you the perception of more bass, essentially a natural bass boost.
Date published: 2014-06-09
I am replacing a speaker in an old intercom system. The original is a Radio Shack FE-103 8 ohm nom 3 W. The mounting holes measured diagonally center to center are 4.5, outside edge 4.75. Will this speaker work?
The mounting hole centers for this driver are 4-3/4" so it will be a tight fit although I see no reason this will not work if you can get it mounted.
Date published: 2014-04-28
Need to know the mounting hole spacing. Looking for 5" from widest to widest across. Please advise ASAP.
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: 2014-04-08
I'm replacing a 6 ohm, 4.5" woofer with a 8 ohm , 4.5" woofer. Is this OK? Should I replace the woofer from the other speaker in the pair?
Replacing a 6 ohm with an 8 ohm will not hurt anything. I would recommend changing both since the overall sound will probably be different.
Date published: 2014-03-26
What is the diameter of the bolt circle for mounting?
The bolt circle on this driver is 4-3/4".
Date published: 2014-03-24
What is the value of Thiele-Small Parameter Sd? It is not listed.
Sd on this driver will be 71 cm^2.
Date published: 2014-03-30