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  3. CX 80 U vs B5

Sennheiser CX 80 U vs Sudio B5

What CX 80 U does better (1) and where B5 wins (0) — every spec side by side.

Sennheiser CX 80 U
Sennheiser · 2026CX 80 U
1 advantage≈ $35
vs
Sudio B5
Sudio · 2026B5
0 advantages≈ $45

Why is CX 80 U better than B5?

  1. Weight14 g vs 29 g2×

Why is B5 better than CX 80 U?

B5 has no measurable advantages in this pair.

Specifications

Side by side

Sudio B5Sudio B5≈ $45
Sound
FitIn-earBone conduction
Ear cup designClosed-back—
Driver typeDynamic—
Driver size—16 mm
Lowest frequency17 Hz—
Highest frequency20,000 Hz—
Impedance28 Ω8 Ω
Sensitivity119 dB84 dB
Battery & charging
Battery life—8.5 h
Connectivity
WirelessNoYes
Bluetooth version—6
Bluetooth codecs—SBC
Hi-res codec (LDAC / aptX HD / LHDC)—No
aptX—No
LDAC—No
USB-CYes—
Design & build
Weight14 g29 g
Protection rating—IPX7
Water resistance (IPx)—IPx7
Features
Hands-free calls—Yes
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