Power Supply Line Noise Suppression for Home Audio

Digital amplifiers are increasingly popular for home audio applications. In many cases, power is supplied from an AC outlet for home audio, and the conductive noise in the power supply cable is regulated under EMC standards. Therefore, it is necessary to prevent noise from leaking into the power supply line during audio playback. Here is an overview of noise problems in home audio cables and their solutions.

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Murata Electronics Ferrite Beads 70 OHM Alternate Sizing Guide Below
Datasheet
9,062In Stock
8,000Expected 13/7/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 70 Ohms 6 A 25 % 9 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 270 OHM 4.5A Alternate Sizing Guide Below
Datasheet
1,298In Stock
297,500On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

BLM31KN_SN Ferrite Chip Beads SMD/SMT 1206 (3216 metric) 270 Ohms 4.5 A 25 % 16 mOhms - 55 C + 125 C 3.2 mm 1.6 mm 1.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 20 OHM Alternate Sizing Guide Below
Datasheet
6In Stock
90,000Expected 25/12/2026
MouseReel Available
Min.: 1
Mult.: 1
: 10,000

BLM15_SN Ferrite Beads SMD/SMT 0402 (1005 metric) 20 Ohms 3.8 A 25 % 11 mOhms - 55 C + 125 C 1 mm 0.5 mm 0.5 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 22 OHM Alternate Sizing Guide Below
Datasheet
67,703On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 22 Ohms 6 A 25 % 8 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 120 OHM Alternate Sizing Guide Below
Datasheet
99,597On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

BLM31KN_SN Ferrite Chip Beads SMD/SMT 1206 (3216 metric) 120 Ohms 6 A 25 % 9 mOhms - 55 C + 125 C 3.2 mm 1.6 mm 1.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads FB SMD 0603inch 220o hm NONAUTO Alternate Sizing Guide Below
Datasheet
12,000Expected 4/9/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 220 Ohms 2.8 A 25 % 48 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads
Datasheet
56Factory Stock Available
More Info Available
MouseReel Available
Min.: 1
Mult.: 1
: 15,000

BLM02xX_SN Ferrite Beads SMD/SMT 1005 (0402 metric) 10 Ohms 1.5 A 5 Ohms 30 mOhms - 55 C + 125 C 0.4 mm 0.2 mm 0.2 mm Reel, Cut Tape, MouseReel