Marshall Stanmore II vs Marshall Acton III

Last updated: August 15, 2026

Short answer: the Marshall Stanmore II for better sound quality, the Marshall Acton III for the lower price. The Marshall Stanmore II ranks #7 of 13 powered desktop speakers at $300. The Marshall Acton III ranks #9 at $227.44, $72.56 cheaper.

What the Marshall Stanmore II offers: Its documented strengths make it a credible option in this class. Watch for: Not very deep bass.

What the Marshall Acton III offers: Its documented strengths make it a credible option in this class. Watch for: Not as deep bass as competitors.

Buy the Marshall Stanmore II if sound quality matters more than the price. Buy the Marshall Acton III if the price matters more than sound quality.

Marshall Stanmore II vs Marshall Acton III

Specifications Side By Side

Marshall Stanmore II Marshall Acton III
Price$300$227.44
Ranked#7 of 13 in Medium Size Powered Desktop Speakers#9 of 13 in Medium Size Powered Desktop Speakers
Aux InputYesYes
Bass Extension (-10dB)55Hz-
Battery LifeNo BatteryNo Battery
IP RatingNoneNone
Power BankNoNo
Power InputAC Power brick-
StereoPartially (1 woofer)Partially (1 woofer)
Weight10.3 lbs / 4.65 kg6.3 lbs / 2.85 kg
AppYesYes
Bluetooth CodecsSBC, aptXSBC
Bluetooth Version5.05.2
Dimensions13.8" x 7.9" x 7.3" (350 x 200 x 185 mm)10.2" x 6.7" x 5.9" (260 x 170 x 150 mm)
EQYes (Bass/Treble)Yes (Bass/Treble)
Frequency Response50Hz - 20kHz (Manufacturer specified)45Hz - 20kHz (Manufacturer specified)
InputsBluetooth, RCA, Aux, OpticalBluetooth, Aux
Drivers5.25" woofer, 2x 2" midranges, 2x 0.75" Dome tweeters4" (midrange/woofer), 1x 4" midrange, 2x 0.75" Dome tweeters
Party ModeNoNo
TWSYesNo
Voice AssistantsYes-
WifiNoNo
Woofer Cabinetportedported
Output Power80W (Woofer: 50W, Tweeters: 2x15W)60W (Woofer: 30W, Tweeters: 2x15W)

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The Two Speakers In Full

Marshall Stanmore II: $300 Amazon

Marshall Stanmore II ranking card

Cons: Not very deep bass. No battery. No water rating.

AppYes
Aux InputYes
Bass Extension (-10dB)55Hz
Battery LifeNo Battery
Bluetooth CodecsSBC, aptX
Bluetooth Version5.0
Dimensions13.8" x 7.9" x 7.3" (350 x 200 x 185 mm)
Drivers5.25" woofer, 2x 2" midranges, 2x 0.75" Dome tweeters
EQYes (Bass/Treble)
Frequency Response50Hz - 20kHz (Manufacturer specified)
IP RatingNone
InputsBluetooth, RCA, Aux, Optical
Output Power80W (Woofer: 50W, Tweeters: 2x15W)
Party ModeNo
Power BankNo
Power InputAC Power brick
StereoPartially (1 woofer)
TWSYes
Voice AssistantsYes
Weight10.3 lbs / 4.65 kg
WifiNo
Woofer Cabinetported

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Marshall Acton III: $227.44 Amazon

Marshall Acton III ranking card

Cons: Not as deep bass as competitors.

AppYes
Aux InputYes
Battery LifeNo Battery
Bluetooth CodecsSBC
Bluetooth Version5.2
Dimensions10.2" x 6.7" x 5.9" (260 x 170 x 150 mm)
Drivers4" (midrange/woofer), 1x 4" midrange, 2x 0.75" Dome tweeters
EQYes (Bass/Treble)
Frequency Response45Hz - 20kHz (Manufacturer specified)
IP RatingNone
InputsBluetooth, Aux
Output Power60W (Woofer: 30W, Tweeters: 2x15W)
Party ModeNo
Power BankNo
StereoPartially (1 woofer)
TWSNo
Weight6.3 lbs / 2.85 kg
WifiNo
Woofer Cabinetported

As an eBay Partner, we may be compensated if you make a purchase.