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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AC Infinity Inline Duct Fan Silencer, 150mm Noise Reduction Muffler Blower

AC Infinity Inline Duct Fan Silencer, 150mm Noise Reduction Muffler Blower

Product ID: 464967529

Details

Brand
AC Infinity
Inlet connection size
6 Inches
Item weight
2 Kilograms
Material
Aluminium
Shape
Oval

📏6-inch duct diameter

🔇50% noise reduction

🛡️corrosion-resistant galvanized steel

Description

🔇 Silence your space, amplify your focus.

SEAMLESS FIT - Dual aluminum flanges ensure perfect integration with your 6-inch inline fans and ducts.
BUILT TO ENDURE - Galvanized steel body resists corrosion and extreme temperatures for lasting reliability.
VERSATILE APPLICATION - Ideal for grow tents, server rooms, bathrooms, and any HVAC setup craving peace.
WHISPER QUIET PERFORMANCE - Cut fan noise by up to 50% with advanced neoprene foam tech.
MAX AIRFLOW MINIMAL DISTRACTION - Egg crate foam design muffles sound without compromising airflow efficiency.

The AC Infinity Inline Duct Fan Silencer is a premium noise reduction accessory designed to cut fan noise by up to 50% using high-grade neoprene foam and dual aluminum flanges. Its corrosion-resistant galvanized steel body withstands extreme temperatures, fitting seamlessly with 6-inch inline fans to deliver quieter, more efficient ventilation for grow tents, HVAC systems, and more.

Specifications

ASIN	B0829F2VXP
Best Sellers Rank	70,450 in Garden ( See Top 100 in Garden ) 38 in Hydroponic Ventilation Equipment
Brand Name	AC Infinity
Customer Reviews	4.5 4.5 out of 5 stars (526)
Global Trade Identification Number	00819137021068
Inlet Connection Size	6 Inches
Item Highlight	Silencer for Indoor Hydroponics Grow Tent Ventilation Systems, 6-Inch
Item Shape	Oval
Item Weight	2 Kilograms
Manufacturer	AC Infinity
Manufacturer Part Number	AC-DSA6
Material Type	Aluminium
Model Number	AC-DSA6
Number of Items	1
Outlet Connection Size	6 Inches
UPC	819137021068
Unit Count	1.0 count

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