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  3. Stockwell III vs GX-30ARC

Marshall Stockwell III vs Onkyo GX-30ARC

What Stockwell III does better (1) and where GX-30ARC wins (2) — every spec side by side.

Marshall Stockwell III
Marshall · 2026Stockwell III
7.3Score
1 advantage≈ $240
Higher score
vs
Onkyo GX-30ARC
Onkyo · 2025GX-30ARC
2 advantages≈ $280
7.6Sound8.4
Dimensions

Size comparison

Stockwell IIIGX-30ARC
150 × 18172146 × 220170
Stockwell IIIGX-30ARCDifference
Height181 mm220 mm−39 mm
Width150 mm146 mm+4 mm
Depth72 mm170 mm−98 mm

Drawn to the same scale from the official dimensions (front and side).

Why is Stockwell III better than GX-30ARC?

  1. Output power127 W vs 100 W+27%

Why is GX-30ARC better than Stockwell III?

  1. Highest frequency20,000 Hz vs 22,000 Hz+10%
  2. Lowest frequency54 Hz vs 51 Hz+6%
Specifications

Side by side

Sound
Driver typeDynamic—
Driver size76.2 mm—
Output power127 W100 W
Speaker channelsStereo2.0
Channel count—2
Lowest frequency54 Hz51 Hz
Highest frequency20,000 Hz22,000 Hz
Adjustable equaliserYes—
StereoYesYes
Battery & charging
Battery life40 h—
Charging time3 h—
Quick charge (claimed)20 min → 7 h—
Fast charging supportYes—
Power bank functionYes—
Mains powered—Yes
Battery powered (portable)YesNo
Connectivity
WirelessYesYes
Bluetooth version5.35.3
Bluetooth codecsLC3, AAC, SBCSBC
Hi-res codec (LDAC / aptX HD / LHDC)NoNo
aptXNoNo
LDACNoNo
Multipoint (two devices)Yes—
LE AudioYes—
AuracastYes—
USB-CYesYes
3.5 mm jack / AUXYes—
Optical input—Yes
Design & build
Weight1,300 g—
Width150 mm146 mm
Height181 mm220 mm
Depth72 mm170 mm
Protection ratingIP55—
Water resistance (IPx)IPx5—
Dust protection (IP)5—
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