Polk Audio Signa S4 vs JBL Bar 2.1 Deep Bass MK2 Soundbar Comparison

Polk Audio Signa S4 vs JBL Bar 2.1 Deep Bass MK2

Polk Audio Signa S4

3.1.2-channel | $449

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JBL Bar 2.1 Deep Bass MK2

2.1-channel | $380

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Polk Audio Signa S4 vs JBL Bar 2.1 Deep Bass MK2: the short answer

We can compare 13 features from the published specs. The Polk Audio Signa S4 is ahead on 5, the JBL Bar 2.1 Deep Bass MK2 on 1, and 7 are ties. The biggest difference for movies is height: the Polk Audio Signa S4 has 2 ceiling-firing channels and the JBL Bar 2.1 Deep Bass MK2 has none.

Reasons to choose Polk Audio Signa S4 over JBL Bar 2.1 Deep Bass MK2

Channel layout: 3.1.2 vs 2.1
Height channels: 2 vs 0
Dolby Atmos: Yes vs No
HDMI to the TV: eARC vs ARC
Dialogue enhancement: Yes vs No

Reasons to choose JBL Bar 2.1 Deep Bass MK2 over Polk Audio Signa S4

Height: 2.25 in vs 2.5 in

Side-by-Side Comparison

	Polk Audio Signa S4	JBL Bar 2.1 Deep Bass MK2
Channel layout Counts speaker channels the bar actually has. More ear-level and height channels means a wider, taller sound field.	3.1.2	2.1
Height channels Drivers aimed at the ceiling, which is what makes Dolby Atmos sound overhead rather than just wide.	2	0
Dolby Atmos	Yes	No
DTS:X	No	No
HDMI to the TV eARC carries lossless Dolby TrueHD and Atmos from the TV; plain ARC compresses them.	eARC	ARC
HDMI inputs A spare HDMI port for a games console or disc player.	1	1
Video pass-through	—	1080p
Subwoofer Included beats optional beats none: a separate subwoofer is where deep bass comes from.	Included	Included
Rear speakers Real rear speakers put effects behind you; without them surround is simulated from the front.	None	None
Room correction	No	No
Streaming	Bluetooth only	Bluetooth only
Voice assistant Built in, rather than through a separate smart speaker.	No	No
Dialogue enhancement	Yes	No
Height Lower is less likely to block the bottom of the TV picture.	2.5 in	2.25 in
Width / suits TVs from Neither is better: match the bar to your TV. See the size simulator below.	41.13 in / 50-inch	38 in / 50-inch
Drivers in the bar	7	6
Power (total, as published) Makers rate soundbar power differently, so the totals are not a like-for-like comparison.	—	50 W
Weight	—	4.7 lbs
List price	$449	$380

Green marks the better figure where one is better. Dashes are specs the maker does not publish.

Size: Both Soundbars in Front of a TV

Drawn to scale. The solid bar is the Polk Audio Signa S4, the dashed outline the JBL Bar 2.1 Deep Bass MK2. Pick your TV size and how it stands to see whether either would cover the picture.

Full Specifications

Polk Audio Signa S4 Specifications

Sound
Channels	3.1.2
Dolby Atmos	Yes
DTS:X	No
Drivers	Tweeters: 1" Dome (3); Midrange: 2.625" Height Drivers (2); Woofers: 4.75"x1.5" Cone (2); Subwoofer: 5.9375" Cone; Enclosure: Ported
Subwoofer	Included
Rear speakers	None
Virtual surround	Movie Mode
Dialogue enhancement	Yes
Night mode	Yes
Room correction	No
Connections
HDMI to TV	eARC
HDMI inputs	1
HDMI version	2.1
Optical inputs	Yes
Analogue input	3.5mm
USB	No
Subwoofer output	Wireless
HDMI CEC	Yes
Streaming and Control
Wi-Fi	No
Bluetooth	Yes
Voice control	No
Remote included	Yes
Learns TV remote	Yes
Physical
Dimensions (W x H x D)	41.13 x 2.5 x 3.81 in / 1045 x 64 x 97 mm
Subwoofer size	7.88 x 12.94 x 12.81 in (W x H x D)
Wall mounting	Yes (no bracket supplied)
Warranty	1 Year parts, 1 Year labour
List price	$449

Power is the maker's total across all drivers and is not comparable to an amplifier's per-channel rating.

JBL Bar 2.1 Deep Bass MK2 Specifications

Sound
Channels	2.1
Dolby Atmos	No
DTS:X	No
Drivers	Tweeters: 1" Dome (2); Woofers: Oval Cone (4); Subwoofer: 6.5" Cone; Enclosure: Bass Relfex
Power (bar, total)	50 watts
Power (subwoofer)	100 watts
Frequency response	40-20k Hz
Subwoofer	Included
Rear speakers	None
Virtual surround	JBL Surround Sound
Dialogue enhancement	No
Night mode	No
Room correction	No
Connections
HDMI to TV	ARC
HDMI inputs	1
Video pass-through	1080p
HDMI version	1.4
Optical inputs	Yes
Analogue input	No
USB	USB-A
Subwoofer output	Wireless
HDMI CEC	Yes
Streaming and Control
Wi-Fi	No
Bluetooth	Yes
Voice control	No
Remote included	Yes
Learns TV remote	Yes
Physical
Dimensions (W x H x D)	38 x 2.25 x 3.38 in / 965 x 57 x 86 mm
Weight	4.7 lbs / 2.13 kg
Subwoofer size	9.5 x 14.88 x 11.25 in (W x H x D), 12.5 lbs
Wall mounting	Yes (bracket included)
Warranty	1 Year parts, 1 Year labour
List price	$380

Power is the maker's total across all drivers and is not comparable to an amplifier's per-channel rating.

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