Compare Amphion Helium 510 vs Amphion Krypton3 vs Bowers & Wilkins 603 S2

Speaker: White, Black, or Walnut / Grilles: Stone grey, Traffic red, heather violet, Turquoise blue, Sky blue, Yellow green, Sulfur yellow, Beige brown

Speaker: White, Black, or Walnut | Grilles: Stone grey, Traffic red, heather violet, Turquoise blue, Sky blue, Yellow green, Sulfur yellow, Beige brown

Black, White, Oak body + Black, Grey grille

2x 8" paper-papyrus midrange

1x 150mm (6 in) Continuum cone FST

1x 1" titanium tweeter

1x 1" titanium (integrator) tweeter

1x 25mm (1 in) Decoupled Double Dome aluminum tweeter

1x 5.25" paper woofer

1x 10" aluminium woofer

2x 165mm (6.5 in) Paper cone

Bookshelf loudspeaker

Floorstanding loudspeaker

Floorstanding loudspeaker

2-way, bass reflex

3-way, bass reflex

3-way bass-reflex

265 mm (10.5")

240 mm

340mm (13.4 in) cabinet only / 370mm (14.6 in) with plinth

316 mm (12.5")

1338 mm

985mm (38.8 in) cabinet only / 1055mm (41.5 in) with plinth

160 mm (6.5")

470 mm

190mm (7.5 in) cabinet only / 320mm (12.6 in) with plinth

7 kg (15 lbs)

72 kg (159 lbs)

24.1 kg / 53.1 lbs

1600 Hz

160 Hz / 1600 Hz

48Hz - 25kHz (-6dB)

21Hz - 25kHz

48Hz - 28kHz ±3dB

8 ohms

4 ohms

8Ω (minimum 3.0Ω)

20-100 W

100-300 W

30W - 200W into 8Ω

86 dB

89 dB

88.5dB spl (2.83V, 1m)

1% 90Hz - 22kHz / 0.5% 120Hz - 20kH

2017-12 (redesigned)

2016-04

2020-09

Finland (handmade)

Finland (handmade)