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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 *
  • Sealed Volume0.05 ft.³
  • Sealed F3135 Hz
  • Vented Volume0.1 ft.³
  • Vented F395 Hz
  • * Enclosure volume/F3s based on BassBox "optimum" calculations-
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
    (4 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 4.75 out of 5 by 4.
Rated 4 out of 5 by from Surprisingly decent sounding for the low priceOK, it's no JBL, but I bought this speaker to replace an old crusty speaker in an early 60's Grundig tube radio and it sounds better (obviously) than the ancient paper one and in a small box approaches, in sound quality, that of a JBL bookshelf speaker I compared it against.So again, for this application, I am very happy with it. If not even a little amazed :)
Date published: 2014-03-30
Rated 5 out of 5 by from Great high efficiency full range driverI am using it for an amateur radio communications speaker in a sealed enclosure because of its high efficiency/high SPL rating. Provides plenty of great sounding communications audio in a single driver while not needing a lot of power from a ham radio transceiver. This helps to keep output amplifier distortion low. Because of high efficiency, this driver has a small XMAX.
Date published: 2014-03-30
Rated 5 out of 5 by from Great for Yamaha speaker barI used these to replace the two midbass drivers in a Yamaha YSP-4000 unit that had taken a fall that dislodged the magnets on the original drivers. I wasn't sure if they would fit, but I took a chance. They ended up being a perfect drop-in replacement. The speaker bar is working well once again. These are also built well. I appreciate the use of cloth surrounds instead of the foam that is far too common on these replacement-type speakers.
Date published: 2014-03-30
Rated 5 out of 5 by from Great sounding and the price is so right!I purchased these as rear deck replacements in my '90 AMG and was surprised by the lows these speaker deliver. They are not direct replacements so I had to modify things a bit but it was worth it. I will use them to replace all the speakers in the doors and dash. 6x $8.20 and shipping costs equal one great sounding deal!!
Date published: 2014-03-30

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email  for a prompt reply.
GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm

What do you think of this driver for a line array?

Asked by: groig
this would be a great speaker in a line array.heres some other speakers that would work great if you deside to change your mind
Answered by: speaker freack
Date published: 2014-03-30

Anyone have any ideas about using these in a diy soundbar. Any suggestions?

Asked by: woodscrew
I don't see anything wrong with this. It will probably require a sealed enclosure for the smoothest bass response and possibly a small tweeter to help the top octave, although this is subjective.
Answered by: MattP
Date published: 2014-02-06

What is the diameter of the bolt circle for mounting?

Asked by: Bandit
The bolt circle on this driver is 4-3/4".
Answered by: MattP
Date published: 2014-03-24

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?

Asked by: jjmcp2
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.
Answered by: MattP
Date published: 2014-03-26

What is the value of Thiele-Small Parameter Sd? It is not listed.

Asked by: Digital_Steve
Sd on this driver will be 71 cm^2.
Answered by: MattP
Date published: 2014-03-30

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

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