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

Brand:|Model: 4FR-8|Part # 292-434
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.
Due In: 5/27/2016
List Price$14.99
You Save45%
Your Price
Buy 4+$7.15
Part # 292-434
  • Replacement for Pioneer A11EC80-02F
  • Extended bandwidth and high sensitivity
  • Natural-sounding paper cone
  • Quality GRS construction and 3-year warranty

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
    (15 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.

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 4.4667 out of 5 by 15.
Rated 2 out of 5 by from Not bad, but difficult fit in Bose 901-IIThis appears to be a good value overall, given the low price. However, because it is physically so deep, in what would seem to be a "no brainer" application, as a replacement driver for early Bose 901 systems (Series 1 & 2) with the cloth surround drivers, the "middle" speakers' magnet structures will contact each other. I can visualize other "full range" applications where the depth could be a problem, as well.The biggest problem is that the "bump" in the basket is overdone for this app. The speaker distorts badly anyway, B4 the excursion gets half way to where the spider-to-coil joint would bottom on the top plate. This is, after all, an inexpensive full range, not a high performance woofer. This deep basket bump also forces use of a little longer coil former, increasing cost slightly, increasing the chances of coil rocking causing contact of the coil to the pole or top plate, and possibly deteriorating the freq. response a bit. GRS would be well advised to look for this basket with only a 2mm bump at most.It is also possible that a cold forged back plate with a taper to it, toward the OD, would cost no more than the present back plate, and (with less magnetic losses) might even result in the magnet being able to be 1 or 2 mm thinner. This would help in the 901 replacement driver scenario, and possibly in other apps. GRS might be able to significantly increase their sales of this driver...On a positive note, at modest excursions, this driver is reasonably quiet, in terms of air noise. I'd prefer a slightly larger dia. pole vent, but, still, this unit betters a number of rivals in this regard. The Kapton former is a nice touch in a "cheapy" driver, too. (In this case I'd consider the tradeoffs, overall, "positive".)A footnote to PE: When shipping cartons of these, the CARTONS are not designed to survive UPS, and need to be in a larger box with packing material all around, per UPS guidelines. Otherwise, bent frames are a distinct possibility, as I have found to my dismay...
Date published: 2016-01-22
Rated 5 out of 5 by from nice little speaker for FRFR Guitar practiceI had a little 6.5 inch 15 watt Practice bass amp, that was open back. I installed this speaker, and closed up the back for .23 cu ft. I can now plug in my amp sim processor and listen at reasonable volumes, and since the response on this speaker os very flat it sounds about the same as through headphones but you get the feel of an ampe because you get it interacting in the room you are listening. The tone is about the same for all volumes. The 15 watts gives plenty of headroom. I had a Micro Cube and the speaker kept farting out on the clean settings when played at moderate volume. Bass practice amps are fairly flat and they have decent eq and have low distortion. This is a perfect fit for a guitar FRFR practice amp. You will realize most guitar speakers start to roll off at about 150hz, so this is perfect, you still get a full clear sound at moderate volumes. Check WindISD, this is a very cheap easy very useful project.
Date published: 2015-12-31
Rated 5 out of 5 by from Great soundBought one to replace the 4.5 inch w4-8spt speaker in my JVC center channel that the foam had decentigrated. This speaker sound so much cleaner and clearer the the original
Date published: 2015-11-03
Rated 5 out of 5 by from Very powerfulI bought four of these a while back and finally have two replacing two woofers in a JVC centre channel speaker and my lord do they have fantastic vocals and surprising a fair bit of punch. Not heavy in the bass obviously on what they are designed to be a full range driver but spectacular mid and highs with the assistance of the tweeter. Very well built drivers, very very strong. Thanks Parts-Express!
Date published: 2015-09-12
Rated 5 out of 5 by from Great sounding speaker!Seems very well built. I don't know how they can put together something this good for so little money.
Date published: 2015-03-10
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
  • 2016-04-29T06:35CST
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Product Q&A

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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?

Asked by: gychang
I would use a 1 inch port that is 1-5/8 inches long. That will tune the box to 90 Hz.
Answered by: Chrisf
Date published: 2016-04-14

thinking of using these for cube speakers in a home I crazy using these? Would you recommend sealed or vented? 

Asked by: rlamo
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.
Answered by: MattP
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

Asked by: ACL33772
We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
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? 

Asked by: Audio4thehome
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".
Answered by: MattP
Date published: 2015-08-05

What is the effective piston area for this driver?

Asked by: Cambe
The Sd of this driver is 62.04 sq cm.
Answered by: MattP
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

Asked by: Kanople
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, or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-04-17
  • 2016-04-29T07:00CST
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