In this review, we will be comparing Motion 40i and RP-8000F, two Passive Floor-standing speakers from MartinLogan and Klipsch.
Let's have a brief look at the main features
of MartinLogan 40i and Klipsch RP-8000F first before getting into our more
detailed comparison.
MartinLogan 40i Key Specs
- 3-way Design
- 1.0 x 1.4" Folded Motion Tweeter
- 5.5" Midrange
- 2 x 6.5" Aluminum Woofer
- 40-25k Hz Frequency Response
- 92 dB Sensitivity
- Impedance: 4ohms
- Power Range:20-300watts
- Weight:20.40kg
- Dimensions (H x W x D): 1055.0" x 7-9/16" x 13-1/16"( 1055.0 x 193.0 x 332.0mm )
Klipsch RP-8000F Key Specs
- 2-way Design
- 1" Tractrix Horn Tweeter
- 2 x 8" Cerametallic Woofer
- 32-25k Hz Frequency Response
- 98 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 150watts
- Weight:27.27kg
- Dimensions (H x W x D): 1099.0" x 10-7/8" x 17-1/2"( 1099.0 x 277.0 x 445.0mm )
What size room are the MartinLogan 40i and Klipsch RP-8000F 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* |
MartinLogan 40i |
Klipsch RP-8000F |
| Near-field |
Bad |
Bad |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Average |
Good |
| Large Room |
Good |
Good |
| Very Large Room |
Average |
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.)
In the following sections, we will get into more detail in order to better understand how the MartinLogan 40i and Klipsch RP-8000F 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
One of the fundamental differences between these two speakers is that Motion 40i is a 3-way design whereas the RP-8000F is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
MartinLogan 40i |
Klipsch RP-8000F |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1.0 x 1.4-inch
|
1-inch
|
|
Midrange
|
1 x 5.5-inch |
- |
|
Woofer
|
2 x 6.5-inch
|
2 x 8-inch
|
Motion 40i features a 1.0 x 1.4" Folded Motion Tweeter , a 5.5" Midrange and 2 x 6.5" Aluminum Woofer with a Crossover frequency at 500Hz and 2600Hz. On the other hand, the RP-8000F features a 1" Tractrix Horn Tweeter and 2 x 8" Cerametallic Woofer .
Frequency Response
Motion 40i has a frequency range of 40-25k Hz whereas RP-8000F has a frequency range of 32-25k Hz. With a minimum frequency of 32Hz, the RP-8000F can go significantly deeper on the low side and provide stronger bass compared to the Motion 40i's min frequency of 40Hz.
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
Motion 40i is a 4 ohms speaker compared to the RP-8000F which has a nominal impedance of 8 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the Motion 40i can provide this impedance level.
These two speakers also have different sensitivity levels. Motion 40i sensitivity is rated at 92 dB and the RP-8000F's is rated at 98 dB. This 6 dB difference makes the Klipsch RP-8000F a more sensitive speaker compared to MartinLogan 40i, hence will play louder with the same amount of watts.
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.
Motion 40i can handle a max power of 300 watts RMS from the amp the whereas RP-8000F has a max power handling value of 150 watts RMS, 150 watts less than the Motion 40i.
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
Both Motion 40i and RP-8000F features dual binding post speaker terminals for bi-amping or bi-wiring.
MartinLogan 40i's Custom 5-way bi-wire tool-less binding posts terminals allows Bi-amping or bi-wiring
Klipsch RP-8000F's Post terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Both Motion 40i and RP-8000F have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
MartinLogan 40i Port
Klipsch RP-8000F 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 MartinLogan 40i's and Klipsch RP-8000F's external dimensions. MartinLogan 40i has external dimensions of 1055.0 x 193.0 x 332.0mm ( 41-1/2 x 7-9/16 x 13-1/16inch) whereas Klipsch RP-8000F has external dimensions of 1099.0 x 277.0 x 445.0mm ( 43-1/4 x 10-7/8 x 17-1/2inch) .
Klipsch RP-8000F is clearly the larger of the two speakers. Its body is 84mm wider, 44mm taller and 113mm deeper than MartinLogan 40i.
Below you can see the front view size comparison of MartinLogan 40i and Klipsch RP-8000F in scale.
Comparison image of MartinLogan 40i and Klipsch RP-8000F Size and External Dimensions
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 MartinLogan 40i is approximately 640.8cm2 / 99.3inch2 and base area of the Klipsch RP-8000F is approximately 1232.7cm2 / 191.1inch2. The Motion 40i requires 48% less surface area than the RP-8000F which gives it a small advantage on placement in tight spaces.