In this review, we will be comparing two different type of speakers by Polk Audio. Polk Audio Legend L600 is a Floor-standing speaker whereas the L400 is a Center Channel speaker.
Let's have a brief look at the main features
of Polk L600 and Polk L400 first before getting into our more
detailed comparison.
Polk L600 Key Specs
- 3-way Design
- 1" Pinnacle Ring Radiator Tweeter
- 5.25" Midrange
- 2 x 7" Polypropylene Woofer
- 34-38k Hz Frequency Response
- 86 dB Sensitivity
- Impedance: 4ohms
- Power Range:30-300watts
- Weight:35.30kg
- Dimensions (H x W x D): 1182.0" x 13" x 16-3/4"( 1182.0 x 331.0 x 426.0mm )
Polk L400 Key Specs
- 3-way Design
- 1" Pinnacle Ring Radiator Tweeter
- 4" Midrange
- 2 x 6.5" Woofer
- 4" Midrange
- 55-38k Hz Frequency Response
- 87.5 dB Sensitivity
- Impedance: 4ohms
- Power Range:25-300watts
- Weight:18.55kg
- Dimensions (H x W x D): 245.0" x 26-1/16" x 13-1/2"( 245.0 x 662.0 x 343.0mm )
L600 and L400 are members of Polk Audio's Legend L series of speakers. Below you can find the loudspeakers from this series.
What size room are the Polk L600 and Polk L400 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 L600 |
Polk L400 |
| Near-field |
Bad |
Poor |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Average |
Good |
| Large Room |
Good |
Good |
| Very Large Room |
Average |
Average |
(* 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.)
In the following sections, we will get into more detail in order to better understand how the Polk L600 and Polk L400 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Drivers
Both L600 and L400 are 3-way speakers.
| Driver |
Polk L600 |
Polk L400 |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 5.25-inch |
1 x 4-inch |
|
Woofer
|
2 x 7-inch
|
2 x 6.5-inch
|
L600 features a 1" Pinnacle Ring Radiator Tweeter , a 5.25" Midrange and 2 x 7" Polypropylene Woofer with a Crossover frequency at 410Hz and 2900Hz. On the other hand, the L400 features a 1" Pinnacle Ring Radiator Tweeter , a 4" Midrange and 2 x 6.5" Woofer .
Frequency Response
L600 has a frequency range of 34-38k Hz whereas L400 has a frequency range of 55-38k Hz. With a minimum frequency of 34Hz, the L600 can go significantly deeper on the low side and provide stronger bass compared to the L400's min frequency of 55Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
High Frequency
Floor-standing Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
L600 and L400 have the same Impedance of 4 ohms but where they differ is the sensitivity levels. L600 sensitivity is rated at 86 dB and the L400's is at 87.5 dB. This 2 dB difference makes the Polk L400 a more sensitive speaker compared to Polk L600, hence will play louder with the same amount of watts.
One thing to keep in mind that the lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit comared to higher impedance speakers especially at high volume levels, so make sure the amp you pair with the L600 and the L600 can provide this impedance level.
Sensitivity
Floor-standing Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
L600 features Binding post posts which make bi-amping or bi-wiring possible. L400 has a Binding post which doesn't feature bi-amping/bi-wiring.
Polk L600's Binding post terminals allows Bi-amping or bi-wiring
Polk L400's Binding post terminals
Cabinet Type and Port Position
L600 has a down firing port whereas L400 has a rear firing ports.
Polk L400 Port
Physical Specs
Size of a speaker can sometimes become 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 L600's and Polk L400's external dimensions. Polk L600 has external dimensions of 1182.0 x 331.0 x 426.0mm ( 46-1/2 x 13 x 16-3/4inch) whereas Polk L400 has external dimensions of 245.0 x 662.0 x 343.0mm ( 9-5/8 x 26-1/16 x 13-1/2inch) .
Polk L400 is 937mm shorter and 83mm less deeper than Polk L600 but it is also 331mm 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 L600 is approximately 1410.1cm2 / 218.6inch2 and base area of the Polk L400 is approximately 2270.7cm2 / 352.0inch2. The L600 requires 38% less surface area than the L400 which gives it a small advantage on placement in tight spaces.
What's in the Box of Polk L600?
Here are the items that are included inside the box of L600:
Floorstanding loudspeakerLarge grilleSmall grille4 Rubber feet (pre-installed)4 Spike feet (pre-installed)2 Jumper-wires (pre-installed)Cleaning clothOwners ManualOnline Registration
What's in the Box of Polk L400?
Here are the items that come with the L400:
Center-channel loudspeakerGrille2 Jumper-wiresCleaning clothOwners ManualOnline Registration
Woofer Size 
Dolby Atmos Drivers 
Base Surface Area 
Sensitivity 
Height 
Price per pair*