Why does this listing show the per item cost as half the total price if these aren't sold in pairs?

I bought mine several years back and do not remember if they came in pairs then. But if you can afford it they are a lot of fun to experiment with and depending on what kind of surface you use can produce some of the best sound.. Good luck, have fun!

What us the range on these and how loud can they get?

The volume and range are both wholey dependant on what you mount it on. Heavier more solid materials like thick hardwoods give a lower tone, and lighter things like rigid foam are higher. Two of these mounted on the wall or to your coffee table will suprize you with the volume, and range. Drywall, or glass sounds really cool. I have purchased over a dozen excites, most are Dayton, and built some really great stuff.

How are these mounted? Just by the circular dual sided tape? Don't they vibrate off the surface they're mounted to?

Yes just the double sided tape. I've had around 8 installed to foam over a year and only one has fallen off so I just epoxied that on back in place.

What is the weight of this unit? Plan to use in drones

I do have a pair but they are up in the shop rafters.. (they say 3.87 ounces..) you know that they will need a "surface" to vibrate such as cardboard in my case. The sound they make by themselves is not much. They may also vibrate the drone.. But they do make a great sound when done right.. well worth you money even if you can not use them on a drone... hope that helped.. good luck to you..

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DAYTONAUDIO Dayton Audio DAEX25FHE-4 Framed High Efficiency 25mm Exciter 24W 4 Ohm

Product ID: 72860320

Details

Audio output mode
Surround
Brand
DAYTONAUDIO
Connectivity technology
solder
Material
neodymium
Model name
DAEX25FHE-4
Mounting type
Surface Mount

📏Compact 2" diameter size

🔊24W RMS high output power

🧲Rare-earth neodymium motor

Description

🎵 Turn any surface into your personal sound stage—compact power, limitless possibilities!

MAGNETIC MASTERY - Rare-earth neodymium motor delivers superior sensitivity with minimal power draw.
AMPLIFY WITHOUT BULK - 4 Ohm impedance pairs perfectly with small Class D amps for efficient, high-quality sound.
PEEL STICK SIMPLICITY - Pre-applied 3M™ VHB™ adhesive ensures instant, rock-solid mounting—no hassle.
ULTRA COMPACT POWERHOUSE - Fits discreetly anywhere under 2" diameter for seamless integration.
VERSATILE SOUND SCULPTOR - Transforms any surface into a dynamic speaker—perfect for innovative audio setups.

The Dayton Audio DAEX25FHE-4 is a high-efficiency 25mm exciter designed to convert almost any surface into a speaker. Featuring a rare-earth neodymium motor and proprietary voice coil, it delivers 24 watts RMS power at 4 ohms impedance. Its compact size and pre-applied 3M™ VHB™ adhesive enable quick, durable installation on diverse materials, making it ideal for creative audio projects requiring discreet, high-quality sound.

Specifications

ASIN	B00PY66ZCC
Antenna Location	windows
Audio Driver Size	25 Millimetres
Audio Driver Type	Dynamic Driver
Audio Output Mode	Surround
Best Sellers Rank	76,648 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 115 in Audio Amplifier 3,179 in Hi-Fi Speakers
Box Contents	3M™ VHB™ adhesive, four screw tabs, two PCB solder points
Brand Name	DAYTONAUDIO
Colour	Silver
Compatible Devices	Smartphone, Tablet, Laptop, Television
Connectivity Protocol	Welding
Control Method	Voice
Controller Type	Voice Control
Customer Package Type	Standard Packaging
Customer Reviews	4.5 4.5 out of 5 stars (343)
Enclosure Material	neodymium
Global Trade Identification Number	00848791000980
Impedance	4 Ohms
Is Waterproof	False
Item Weight	0.25 Pounds
MP3 player	No
Manufacturer	DAYTONAUDIO
Maximum Speaker Output Power (in watts)	24 Watts
Model Name	DAEX25FHE-4
Model Number	DAEX25FHE-4-S
Mounting Type	Surface Mount
Network Connectivity Technology	solder
Number of Audio Channels	2.0
Number of Items	1
Number of Power Levels	1
Power Source	Corded Electric
Processor Count	1
Product Features	Quiet
Speaker Size	27.6 Millimetres
Speaker Type	Surround Sound
Specific Uses For Product	[PARTIAL]
Subwoofer Connectivity Technology	Wired
Subwoofer Speaker Diameter	25 Millimetres
Tweeter Diameter	1 Inches
UPC	848791000980
Warranty Type	Limited
Water Resistance Level	Waterproof
Wireless Technology Type	Bluetooth
Woofer Driver Diameter	25 Millimetres

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