GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm

Brand:| Model: 4FR-8
The GRS 4FR-8 is perfect for compact designs that require wide-bandwidth, high-sensitivity performance at an economical price. It’s also a drop-in replacement for other popular 4-1/2" full-range drivers.
  • Replacement for Pioneer A11EC80-02F
  • Extended bandwidth and high sensitivity
  • Natural-sounding paper cone
  • Quality GRS construction and 3-year warranty
Part # 
Weight: 2.1500 lbs.  
List Price$14.99
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Your Price
Buy 4-up$7.15
Part # 292-434
Qty:  EA
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Product Details

GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm

GRS 4FR-8 full-range 4-1/2" speaker features a well-damped paper cone and long-lasting treated fabric surround. Its design parameters have been carefully chosen to suit a wide variety of enclosures for hi-fi or commercial use, and it's great for use as a full-range driver or as a high-sensitivity midwoofer.

The large ceramic motor structure and lightweight Kapton voice coil former ensure crisp, highly-dynamic reproduction. This driver is a perfect drop-in replacement for the classic Pioneer model A11EC80-02F full-range driver, or other popular 4-1/2" full-range drivers.

Product Specifications
  • Nominal Diameter4-1/2"
  • Power Handling (RMS)15 Watts
  • Power Handling (max)30 Watts
  • Impedance8 ohms
  • Frequency Response100 to 10,000 Hz
  • Sensitivity91 dB 1W/1m
  • Voice Coil Diameter1"
Thiele-Small Parameters
  • Resonant Frequency (Fs)100 Hz
  • DC Resistance (Re)8.11 ohms
  • Voice Coil Inductance (Le)0.71 mH
  • Mechanical Q (Qms)5.14
  • Electromagnetic Q (Qes)0.98
  • Total Q (Qts)0.82
  • Compliance Equivalent Volume (Vas)0.11 ft.³
  • Maximum Linear Excursion (Xmax)1 mm
Materials of Construction
  • Cone MaterialPaper
  • Surround MaterialCloth
  • Basket / Frame MaterialSteel
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter4.5"
  • Baffle Cutout Diameter4.01"
  • Depth2.71"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.05 ft.³
  • Sealed F3135 Hz
  • Vented Volume0.1 ft.³
  • Vented F395 Hz
GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm
  • BrandGRS
  • Model4FR-8
  • Part Number292-434
  • UPC844632091391
  • Product CategoryMidrange / Midbass Drivers & Full-Range Speakers
  • Unit of MeasureEA
  • Product Rating
    (10 Reviews)
  • Weight2.1500 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Similar Products

View similar products to the GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm
in the Midrange / Midbass Drivers & Full-Range Speakers product category.


GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm
GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm is rated 4.5 out of 5 by 10.
Rated 4 out of 5 by from 4.5" replacement mid-range driverReceived the item as described and on time. Installed and it's working as expected.
Date published: 2015-01-06
Rated 4 out of 5 by from Quality UnitsThe speakers are of fine quality and perform beautifully. I think the price is fair and competitive.I had to adapt the mounting process to my enclosure, OK, but I suggest the exact spacing measurement of the mounting holes, the maximum measurement of the outside (front) frame, and the maximum inner frame diameter be listed in the product descripiton.
Date published: 2014-11-19
Rated 5 out of 5 by from Great little speaker!I bought these to place in an empty cabinet I had bought on eBay. Fit perfectly, with no issues. Still waiting to figure out what to do for x-overs and tweeters, so I haven't heard them yet. So far, though, I'm impressed.s
Date published: 2014-09-09
Rated 5 out of 5 by from Speaker ReplacementThis speaker replacement performed better than the original speaker
Date published: 2014-08-23
Rated 4 out of 5 by from Drop-in replacement for Bose 901 (I, II)The original 901 used the CTS 4C1077 driver. I am no expert, but believe that exact replacements for that driver are not available. However, the GRS 4FR-8 is close (thus 4 stars). It's certainly a drop in ("screw in"?) replacement. Specs (ohms, power handling, FR) are similar. Say what you will of the Bose 901, but they are durable: I estimate ("WAG") maybe 60-75% of original drivers still are ok. Bose 901 (I, II) can be bought for $150-300 the pair. I am glad to have found this PE replacement instead of the hit-or-miss nature of cannibilizing old 901s. It's likely, that if you put all or mostly GRS drivers into a 901, the performance will differ. This is easily addressed by using DSP for the active EQ and room EQ too. Unless you're collecting antiques, sell the Active EQ back into the cloud for $50 or $75. I do!
Date published: 2014-07-27
Rated 4 out of 5 by from My ReviewI bought these I have no Idea as to how they function as it turns out they are a little small to fit the cabinet cut out that I had intended them for. They look fine the failure of the fit was my bad. I am still awaiting arrival of more parts to complete the project they were intended for.
Date published: 2014-05-30
  • 2015-02-27T06:33CST
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Product Q&A

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who own this product or have experience with it.
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GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm

Will this work as a true full range speaker driver? I'm new to this and I would like to put this into a small bookshelf cabinet, run wire to it, and add binding posts, then call it good. Will this produce the full frequency spectrum? 

Asked by: SW88
This is a pretty subjective question. This driver plays pretty well up to about 10kHz but will start to lose volume above that. This would work well for some people as a full range, but others might want a bit more extension. Unfortunately I cannot say whether it would sound good enough for your application or not.
Answered by: MattP
Date published: 2015-02-11

The speaker I have is 4 1/2" mounting holes diagonally and 3 1/4" side to side....is this considered a industry standard 4" speaker? I may be looking in the wrong section. Thanks

Asked by: drbobsworld
You will want to measure the cut-out diameter of the hole. There really isn't an industry standard. Parts express shows both the overall diameter and the baffle cutout for the speaker.
Answered by: TomI
Date published: 2014-10-08

Has anyone tried these as replacement drivers for Auratone 5C studio monitor speakers?

Asked by: flotrain
I built comparable monitors with these drivers however in larger ported boxes and they perform fantastically.
Answered by: Kontakt
Date published: 2014-10-10

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?

Asked by: swizard98
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.
Answered by: MattP
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?

Asked by: RichardT51
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.
Answered by: MattP
Date published: 2014-04-28

Need to know the mounting hole spacing. Looking for 5" from widest to widest across. Please advise ASAP.

Asked by: waterworx
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".
Answered by: MattP
Date published: 2014-04-08
  • 2015-02-27T07:37CST
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