In this review, we will be comparing Foundation F1 and RP-280F, two Passive Floor-standing speakers from MartinLogan and Klipsch.
Let's have a brief look at the main features
of MartinLogan Foundation F1 and Klipsch RP-280F first before getting into our more
detailed comparison.
| Key Specs | MartinLogan Foundation F1 | Klipsch RP-280F |
|---|
| Design | 3-way | 2-way |
|---|
| Tweeter | 1" Folded Motion Ribbon | 1" Tractrix Horn |
|---|
| Midrange | 5.5" | — |
|---|
| Woofer | 3 x 5.5" Aluminum | 2 x 8" Cerametallic |
|---|
| Frequency response | 41-23k Hz | 32-25k Hz |
|---|
| Sensitivity | 92 dB | 98 dB |
|---|
| Impedance | 4 ohms | 8 ohms |
|---|
| Power range | up to 200 watts | up to 150 watts |
|---|
| Weight | 21.14kg / 46.5lbs | 28.41kg / 62.5lbs |
|---|
| Dimensions (H x W x D) | 41-7/16" x 8-3/8" x 14-7/16"
1053.0 x 213.0 x 367.0mm | 43-1/16" x 10-9/16" x 17-3/8"
1094.0 x 269.0 x 442.0mm |
|---|
What size room are the MartinLogan Foundation F1 and Klipsch RP-280F 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 Foundation F1 |
Klipsch RP-280F |
| Near-field |
Bad |
Bad |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Good |
Good |
| Large Room |
Good |
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.
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through our links. As an Amazon Associate I earn from qualifying purchases.
Drivers
One of the fundamental differences between these two speakers is that Foundation F1 is a 3-way design whereas the RP-280F 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.
MartinLogan Foundation F1Klipsch RP-280F
TweeterMidrangeWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
MartinLogan Foundation F1 |
Klipsch RP-280F |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 5.5-inch |
- |
|
Woofer
|
3 x 5.5-inch
|
2 x 8-inch
|
Foundation F1 features a 1" Gen2 Obsidian Folded Motion Ribbon Tweeter, a 5.5" Midrange and 3 x 5.5" Aluminum Woofer with a Crossover frequency at 240 Hz - 3700 Hz. On the other hand, the RP-280F features a 1" Tractrix Horn Tweeter and 2 x 8" Cerametallic Woofer.
Frequency Response
Foundation F1 has a frequency range of 41-23k Hz whereas RP-280F has a frequency range of 32-25k Hz. With a minimum frequency of 32Hz, the RP-280F can go significantly deeper on the low side and provide stronger bass compared to the Foundation F1's min frequency of 41Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
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
Foundation F1 is a 4 ohms speaker compared to the RP-280F 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 Foundation F1 can provide this impedance level.
These two speakers also have different sensitivity levels. Foundation F1 sensitivity is rated at 92 dB and the RP-280F's is rated at 98 dB. This 6 dB difference makes the Klipsch RP-280F a more sensitive speaker compared to MartinLogan Foundation F1, 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. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Foundation F1 can handle a max power of 200 watts RMS, whereas RP-280F has a max power handling value of 150 watts RMS, 50 watts less than the Foundation F1.
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.
MartinLogan Foundation F1
Input Type and Bi-Amping / Bi-Wiring
RP-280F features Binding post posts which make bi-amping or bi-wiring possible. Foundation F1 has a Binding post which doesn't feature bi-amping/bi-wiring.
MartinLogan Foundation F1's Binding post terminals
Klipsch RP-280F's Binding post terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Both Foundation F1 and RP-280F 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.
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 MartinLogan Foundation F1's and Klipsch RP-280F's external dimensions. MartinLogan Foundation F1 has external dimensions of 1053.0 x 213.0 x 367.0mm (41-7/16inch x 8-3/8inch x 14-7/16inch) whereas Klipsch RP-280F has external dimensions of 1094.0 x 269.0 x 442.0mm (43-1/16 x 10-9/16 x 17-3/8inch).
Klipsch RP-280F is clearly the larger of the two speakers. Its body is 56mm wider, 41mm taller and 75mm deeper than MartinLogan Foundation F1.
Below you can see the front view size comparison of MartinLogan Foundation F1 and Klipsch RP-280F in scale.
Comparison image of MartinLogan Foundation F1 and Klipsch RP-280F 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 Foundation F1 is approximately 781.7cm2 / 121.2inch2 and base area of the Klipsch RP-280F is approximately 1189.0cm2 / 184.3inch2. The Foundation F1 requires 34% less surface area than the RP-280F which gives it a small advantage on placement in tight spaces.
Weight Comparison The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The MartinLogan Foundation F1 weighs 21.14kg / 46.5lbs and the Klipsch RP-280F weighs 28.41kg / 62.5lbs. This makes the RP-280F 34% heavier than the Foundation F1.
Here is a comparison of how Foundation F1 and RP-280F's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
MartinLogan Foundation F1
What's in the Box of Klipsch RP-280F?
Here are the items that come with the RP-280F:
- Floorstanding loudspeaker (Ebony)
- Speaker base
- Detachable magnetic grille
- Four 1-inch #6 Wood screws
- 4 Spike feet
- 6 Rubber feet
- User Manual
- Warranty Information
- Important Safety Instructions
 Max Input Power |
200 watts
vs
150 watts
|
Handle more power from your amplifier |
 Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
 Number of Woofers |
3
vs
2
|
More woofers |
 Height |
1053mm
vs
1094mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
781cm2
vs
1189cm2
|
Takes less floor space |
 Sensitivity |
98 dB
vs
92 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
|
Woofer Size |
8 inches
vs
5.5 inches
|
Larger woofer |
|
Low Frequency Response |
32 Hz
vs
41 Hz
|
Generates deeper bass |
 High Frequency Response |
25k Hz
vs
23k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Price per pair* |
1198USD
vs
1499USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
MartinLogan Foundation F1 |
Klipsch Reference Premiere RP-280F |
| Brand |
MartinLogan |
Klipsch |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
up to 200 watts |
up to 150 watts |
| Sensitivity |
92 dB |
98 dB |
| Impedance |
4 ohms |
8 ohms |
| Frequency Response |
41-23k Hz |
32-25k Hz |
Drivers |
|
|
| Woofer Quantity |
3 |
2 |
| Woofer Size |
5.5" |
8" |
| Woofer Composition |
Aluminum |
Cerametallic |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Folded Motion Ribbon |
Tractrix Horn |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
5.5" |
No |
| Crossover Frequency |
240 Hz - 3700 Hz |
n/a |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
1053.0mm (41.5") |
1094.0mm (43.1") |
| Width |
213.0mm (8.4") |
269.0mm (10.6") |
| Depth |
367.0mm (14.4") |
442.0mm (17.4") |
| Weight |
21.14kg (46.5lbs) |
28.41kg (62.5lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
n/a |
MDF/Wood-grain vinyl |
| Available Colors |
Walnut,Black,Satin White |
Walnut, Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
Yes |
Other |
|
|
| Parts Warranty |
5 years |
5 Years |
| Labor Warranty |
5 years |
5 Years |
A generation apart: MartinLogan Foundation F1 is the newer design, against a 2015 model. Newer is not automatically better, but the older one is more likely to be discounted or near run-out.
| Area | Better | Why |
|---|
| Bass |
B |
Klipsch RP-280F digs deeper - 32Hz against 41Hz. A subwoofer would even that out. |
| Amplifier needs |
B |
Klipsch RP-280F is more sensitive (98dB vs 92dB), so it goes louder on the same amplifier. |
| Amplifier match |
B |
Klipsch RP-280F is the easier load at 8 ohms; the other is 4 ohms and wants an amplifier rated for it. |
| Headroom |
A |
MartinLogan Foundation F1 takes more power (200W vs 150W) - more in hand in a big room. |
| Size |
depends |
MartinLogan Foundation F1 is easier to place; Klipsch RP-280F is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability |
B |
Klipsch RP-280F: bi-amping. Klipsch RP-280F sits in a wider range (17 models), so a matched surround system is easier later. |
| Price |
B |
Klipsch RP-280F is cheaper - $1,198 against $1,499, about 20% less. |
A MartinLogan Foundation F1
B Klipsch RP-280F
depends neither is better in the abstract - it turns on your room, placement 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?
Klipsch RP-280F is the easier recommendation: it leads on most of the measured areas and costs less. Take MartinLogan Foundation F1 if its size, looks or fit in your room suit you better. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 41Hz anyway, so judge these on the other rows instead. In a large or open-plan room, Klipsch RP-280F has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, MartinLogan Foundation F1 is the easier speaker to get right.
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.