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

⚡High sensitivity for crisp sound

📈Extended bandwidth for rich audio

🔊4.5" full-range driver

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Description

🎶 Elevate your sound game with vintage soul and modern precision!

BUILT TO LAST - Quality GRS construction ensures durability and consistent performance.
COMPACT POWERHOUSE - Perfect fit for tight spaces without sacrificing sound quality.
EFFORTLESS UPGRADE - Drop-in replacement for Pioneer A11EC80-02F—no hassle, just pure sound.
TRUE TO LIFE AUDIO - Natural paper cone delivers authentic, warm tones that revive vintage vibes.
VERSATILE COMPATIBILITY - Works seamlessly with laptops, smartphones, and classic audio setups.

The GRS 4FR-8 is a 4.5-inch full-range speaker designed as a direct replacement for the Pioneer A11EC80-02F. Featuring an extended bandwidth and high sensitivity, it delivers natural, high-fidelity sound through a durable paper cone construction. Ideal for compact audio systems and vintage speaker refurbishments, this 8-ohm dynamic driver supports stereo output and offers a reliable, cost-effective upgrade for audiophiles and professionals alike.

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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€ 79.39

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered 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 Cyprus.

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TrustScore 4.5 | 7,300+ reviews

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