does this get installed before the fane for after the Fan and how far?

I've installed one before and one after - directly on the fan. I ultimately returned the one before the fan because the improvement was relatively minor.

Can you connect these mufflers in series? And what impact does that have? e.g. one reduces 50% two reduces 75% ... and so forth?

I don’t think they can be used end to end but you can put one on either side of the fan and that should reduce the sound.... or if you’d like you can put one directly against the fan and then add another one at the end of a duct as well. I can’t give you any specific numbers though.

Can I simple insert this silencer (not fan) before my output in my home music studio?

The openings on each side is 4" in diameter. I'm not sure exactly what your affixing this to but if it's similar to any duct opening you'll need a clamp or coupler. Hope this helps!

Will this work on a radon fan system?

i dont know about a radon but ive used a hyperfan and it fits perfect. ive also used one of those cheap vivosun ones with the red fan blades and it is about a quarter inch smaller than the flange on th muffler. it does work well though.

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🔇 Silence is the new power move.

PRECISION FIT - Designed with a 4-inch (10.2 cm) channel diameter and dual aluminum flanges for seamless integration and superior vibration absorption.
BUILT TO ENDURE - Galvanized steel body resists corrosion and withstands extreme temperatures, ensuring long-lasting reliability.
LIGHTWEIGHT COMPACT - At just 1.04 kg and 38.1 cm length, it’s easy to install without compromising performance or space.
WHISPER QUIET PERFORMANCE - Cut fan noise by up to 50% with premium neoprene egg crate foam for a distraction-free environment.
VERSATILE VENTILATION SOLUTION - Perfect for hydroponic grow tents, HVAC systems, server cabinets, and bathroom ventilation—upgrade any airflow setup.

The AC Infinity Inline Duct Fan Silencer is a 4-inch noise reduction muffler designed to cut fan noise by up to 50% using high-quality neoprene foam and aluminum flanges. Its galvanized steel construction offers corrosion resistance and durability under extreme temperatures, making it ideal for hydroponic grow tents, HVAC, and other ventilation applications.

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Manufacturer	AC INFINITY
Part number	AC-DSA4
Item Weight	1.04 kg
Package Dimensions	40.69 x 24.89 x 19.89 cm; 1.04 kg
Item model number	AC-DSA4
Size	4"
Item Package Quantity	1
Coverage	Plants in grow tents and hydroponic applications
Specific uses	grow tent ventilation,server cabinet ventilation,hvac applications,AV equipment,room cooling,cabinet cooling,bathroom ventilation
Batteries included?	No
Batteries Required?	No

AC InfinityInline Duct Fan Silencer, 100mm Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems, 4-Inch

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