What size hole/cutout needed to install?

4.25" inch hole is what I used.

I'm considering using these in a sweet 16 configuration. Where can I find the frequency response or, better yet, a frequency response profile graph?

I think you will find the specs at parts-express.com

will this fit in a 22 bronco?

i don't have a bronco. can't you just go to the bronco site and look? these are not very good speakers AT ALL, imo. i use them as replacement bookshelf speakers. can't handle much volume. good luck.

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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

Product ID: 11950165

Details

Audio Output Mode
Stereo
Brand
GRS
Connectivity Technology
Auxiliary HDMI
Frequency Response
50 Hz
Speaker Maximum Output Power
200 Watts

⚡200W max output power

🎯8 Ohm impedance for crisp clarity

🔊4.5" full-range driver

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Description

🎶 Elevate your sound game with precision and power!

WIDEBAND AUDIO MASTERY - Experience extended bandwidth for rich, natural sound that fills any space.
ROBUST GRS BUILD QUALITY - Engineered for durability and consistent performance in any environment.
HIGH SENSITIVITY POWERHOUSE - Delivers impressive volume with minimal power—perfect for compact setups.
SEAMLESS PIONEER REPLACEMENT - Drop-in compatible with Pioneer A11EC80-02F for effortless upgrades.
PREMIUM PAPER CONE CRAFTSMANSHIP - Natural-sounding cone material ensures authentic audio fidelity.

The GRS 4FR-8 is a 4.5-inch full-range speaker designed as a direct replacement for the Pioneer A11EC80-02F. It features an 8 Ohm impedance and delivers up to 200 watts of power, offering extended bandwidth and high sensitivity for natural, clear audio. Built with a premium paper cone and quality GRS construction, it’s ideal for compact, high-performance audio setups.

Specifications

ASIN	B00DVO1OYS
Additional Features	Portable
Age Range Description	Adult
Antenna Location	construction
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Best Sellers Rank	#110,983 in Electronics ( See Top 100 in Electronics ) #960 in Speaker Parts & Components #1,258 in Car Coaxial Speakers
Brand	GRS
Built-In Media	1 Speaker
Color	black
Compatible Devices	Laptop, MP3 Player, Smartphone
Connectivity Protocol	Tool
Connectivity Technology	Auxiliary, Ethernet, HDMI, RCA, USB
Control Method	Touch
Controller Type	Touch Control
Customer Package Type	FFP
Customer Reviews	4.6 4.6 out of 5 stars (107)
Enclosure Material	Paper
Frequency Response	50 Hz
Impedance	8 Ohms
Is Waterproof	FALSE
Item Weight	2.15 Pounds
MP3 player	No
Manufacturer	GRS
Model Name	4FR-8
Model Number	A11EC80-02F
Mounting Type	Flush Mount
Number of Audio Channels	2.0
Number of Items	2
Power Source	Corded Electric
Speaker Maximum Output Power	200 Watts
Speaker Size	4.5 Inches
Speaker Type	Bookshelf
Specific Uses For Product	construction
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	8 Inches
Tweeter Diameter	1 Inches
UPC	844632091391
Warranty Type	Limited
Wireless Technology	No Wireless Communication Technology
Woofer Diameter	4.5 Inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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B/.105

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In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

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