Polk ES30 vs Polk ES55 Comparison

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Polk ES30

Passive Center Channel | 55-40k Hz

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Polk ES55

Passive Floor-standing | 34-40k Hz

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Polk ES30

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Polk ES55

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Polk ES30

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Polk ES55

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Polk ES30 vs Polk ES55 Speaker Comparison

In this review, we will be comparing two different types of speakers by Polk Audio. Polk Audio Signature Elite ES30 is a Center Channel speaker whereas the ES55 is a Floor-standing speaker.

Let's have a brief look at the main features of Polk ES30 and Polk ES55 first before getting into our more detailed comparison.

Key Specs	Polk ES30	Polk ES55
Brand	Polk Audio United States · founded 1972	Polk Audio United States · founded 1972
Design	2-way	2-way
Tweeter	1" High-res dome	1" Soft-Dome
Woofer	2 x 5.5" mica-reinforced polypropylene Dynamic Balance	3 x 6.5" Mica-reinforced polypropylene
Frequency response	55-40k Hz	34-40k Hz
Sensitivity	89 dB	89 dB
Impedance	8 ohms	8 ohms
Power range	20-125 watts	40-200 watts
Weight	8.64kg / 19lbs	20.00kg / 44lbs
Dimensions (H x W x D)	7-1/2" x 20-1/16" x 10-5/8" 191.0 x 510.0 x 270.0mm	41-9/16" x 8-1/2" x 12-3/8" 1056.0 x 216.0 x 315.0mm

ES30 and ES55 are members of Polk Audio's Signature Elite series of speakers. Below you can find the loudspeakers from this series.

Polk Audio Signature Elite Series History

Model	Body	Frequency	Sensitivity	Impedance	Woofer
Polk ES60	Floor-standing	32-40k Hz	90 dB	8Ω	3 x 6.5"
Polk ES20	Bookshelf	41-40k Hz	86 dB	8Ω	1 x 6.5"
Polk ES35	Center Channel	66-40k Hz	89 dB	8Ω	6 x 3"
Polk ES15	Bookshelf	44-40k Hz	85 dB	8Ω	1 x 5.25"
Polk ES50	Floor-standing	38-40k Hz	88 dB	8Ω	2 x 5.25"
Polk ES10	Bookshelf	78-40k Hz	84 dB	8Ω	1 x 4"
Polk ES55	Floor-standing	34-40k Hz	89 dB	8Ω	3 x 6.5"
Polk ES30	Center Channel	55-40k Hz	89 dB	8Ω	2 x 5.5"
Polk Audio Signature Elite ES90	Surround	142-26k Hz	85 dB	8Ω	1 x 5.25"

What size room are the Polk ES30 and Polk ES55 speakers good for?

The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:

Listening Environment*	Polk ES30	Polk ES55
Near-field	Poor	Bad
Small Room	Average	Poor
Mid-size Room	Good	Good
Large Room	Average	Good
Very Large Room	Poor	Poor

(* Approximate Room sizes: Small < 100sq. ft / 9 m², Mid-size: 100-220 sq. ft / 9-20 m², Large 220-400 sq. ft / 20-36 m², Very Large: > 400 sq. ft / 36 m². Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)

The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.

**This post contains affiliate links, and we will be compensated if you make a purchase after clicking through our links. As an Amazon Associate I earn from qualifying purchases.

Drivers

Both ES30 and ES55 are 2-way speakers.

Polk ES30

Polk ES55

TweeterWoofer

Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.

Driver	Polk ES30	Polk ES55
Driver Setup	2-way	2-way
Tweeter	1-inch	1-inch
Midrange	-	-
Woofer	2 x 5.5-inch	3 x 6.5-inch

ES30 features a 1" Terylene High-res dome Tweeter and 2 x 5.5" mica-reinforced polypropylene Dynamic Balance Woofer. On the other hand, the ES55 features a 1" Terylene High-Res Soft-Dome Tweeter and 3 x 6.5" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz.

Frequency Response

ES30 has a frequency range of 55-40k Hz whereas ES55 has a frequency range of 34-40k Hz. With a minimum frequency of 34Hz, the ES55 can go significantly deeper on the low side and provide stronger bass compared to the ES30's min frequency of 55Hz.

The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Center Channel class in our database.

Low Frequency

Center Channel Speakers

ES30

ES55

Min

Average

Median

Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.

Impedance and Sensitivity

ES30 and ES55 have the same Impedance of 8 ohms and their sensitivity is also same at 89 dB.

Sensitivity

Center Channel Speakers

ES30

ES55

Min

Average

Median

Power Range

Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. Staying within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.

ES55 can handle a max power of 200 watts RMS, whereas ES30 has a max power handling value of 125 watts RMS, 75 watts less than the ES55.

Note that higher power handling does not make a speaker louder: that depends mainly on sensitivity and impedance. The calculator below shows how loud each of these actually plays on a real amplifier.

Which plays louder on your amplifier?

Starting with a popular amplifier - change it to the one you own, or any you are considering, and watch both numbers move.

Amplifier - change this

Distance

Playing as

Polk ES30

Polk ES55

Input Type and Bi-Amping / Bi-Wiring

ES55 features 5-Way post posts which make bi-amping or bi-wiring possible. ES30 has a 5-Way post which doesn't feature bi-amping/bi-wiring.

Polk ES30's 5-Way post terminals

Cabinet Type and Port Position

ES30 has a rear firing port whereas ES55 has a bottom firing ports. Polk ES55's bottom-firing port gives more flexibility in placement in regards to proximity to walls compared to Polk ES30 with its rear-firing port.

Polk ES30 Port

Physical Specs

The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Polk ES30's and Polk ES55's external dimensions. Polk ES30 has external dimensions of 191.0 x 510.0 x 270.0mm (7-1/2 x 20-1/16 x 10-5/8inch) whereas Polk ES55 has external dimensions of 1056.0 x 216.0 x 315.0mm (41-9/16 x 8-1/2 x 12-3/8inch).

Polk ES30 is 865mm shorter and 45mm less deeper than Polk ES55 but it is also 294mm wider.

Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base surface area of the Polk ES30 is approximately 1377.0cm² / 213.4inch² and base area of the Polk ES55 is approximately 680.4cm² / 105.5inch². The ES30 requires 102% more surface area than the ES55 which gives it a small disadvantage on placement in tight spaces.

What's in the Box of Polk ES30?

Here are the items that are included inside the box of ES30:

Center-channel loudspeaker
Grille (attached)
4 Self-adhesive rubber feet
Owners Manual
Online Product Registration

What's in the Box of Polk ES55?

Here are the items that come with the ES55:

Floorstanding loudspeaker
Grille (attached)
4 Feet (pre-installed)
Owners Manual
Online Product Registration

Reasons to choose Polk Audio Signature Elite ES30 over Polk Audio Signature Elite ES55

Height	191mm vs 1056mm	Easier to fit in smaller spaces
Price per pair*	299USD vs 898USD	costs less (*prices may change depending on the seller, location and time)

Reasons to choose Polk Audio Signature Elite ES55 over Polk Audio Signature Elite ES30

Max Input Power	200 watts vs 125 watts	Handle more power from your amplifier
Woofer Size	6.5 inches vs 5.5 inches	Larger woofer
Number of Woofers	3 vs 2	More woofers
Low Frequency Response	34 Hz vs 55 Hz	Generates deeper bass
Base Surface Area	680cm² vs 1377cm²	Takes less floor space

Polk ES30 vs Polk ES55 Specs Table

Detailed comparison of specifications

General	Polk Audio Signature Elite ES30	Polk Audio Signature Elite ES55
Brand	Polk Audio	Polk Audio
Speaker Type	Center channel speaker	Floor-standing speaker
Power Range	20-125 watts	40-200 watts
Sensitivity	89 dB	89 dB
Impedance	8 ohms	8 ohms
Frequency Response	55-40k Hz	34-40k Hz
Drivers
Woofer Quantity	2	3
Woofer Size	5.5"	6.5"
Woofer Composition	mica-reinforced polypropylene Dynamic Balance	Mica-reinforced polypropylene
Woofer Surround Material	n/a	Butyl rubber
Tweeter Size	1"	1"
Tweeter Type	High-res dome	Soft-Dome
Aimable Tweeter	No	No
Midrange Driver	No	No
Crossover Frequency	n/a	2500Hz
Firing Direction	rear	bottom
Physical Specs
Height	191.0mm (7.5")	1056.0mm (41.6")
Width	510.0mm (20.1")	216.0mm (8.5")
Depth	270.0mm (10.6")	315.0mm (12.4")
Weight	8.64kg (19lbs)	20.00kg (44lbs)
Enclosure	Bass Reflex	Bass Reflex
Finish	MDF, Wood-grain vinyl	MDF, Wood-grain vinyl
Available Colors	Black, Walnut, White	Black
Grille	Yes	Yes
Moisture Resistancy	No	No
Connections
Biamp Inputs	n/a	Yes
Other
Parts Warranty	5 Years	5 Years
Labor Warranty	5 Years	5 Years

Verdict

Siblings in Polk Audio's Signature Elite series, so they share a family sound. It comes down to size, output and price.

Area	Better	Why
Bass	B	Polk ES55 digs deeper - 34Hz against 55Hz.
Amplifier needs	evenly matched	Similar sensitivity (89dB vs 89dB) - both want much the same power.
Headroom	B	Polk ES55 takes more power (200W vs 125W) - more in hand in a big room.
Size	depends	Polk ES30 is easier to place; Polk ES55 is bigger, which usually goes with fuller bass. Your room decides.
Type	depends	A Passive Center Channel against a Passive Floor-standing - a different job rather than a better one.
Expandability	B	Polk ES55: bi-amping.
Price	A	Polk ES30 is cheaper - $299 against $898, about 67% less; arguably a different class.

A Polk ES30 B Polk ES55
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.

Which should you choose?

The usual trade-off: Polk ES55 measures better, Polk ES30 costs about about 3x the price% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 55Hz anyway, which makes the cheaper Polk ES30 much easier to justify. Match it to your room: we rate Polk ES30 the better fit for a small room, and Polk ES55 for a large room.

And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.