In this review, we will be comparing Performa4 F345 and Concord, two Passive Floor-standing speakers from Revel and KLH.
Let's have a brief look at the main features
of Revel Performa4 F345 and KLH Concord first before getting into our more
detailed comparison.
| Key Specs | Revel Performa4 F345 | KLH Concord |
|---|
| Brand | Revel
United States · founded 1996 | KLH
United States · founded 1957 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" Hard-Dome | 1" |
|---|
| Woofer | 3 x 5.25" Micro Ceramic Composite (MCC) | 2 x 6.5" Kevlar |
|---|
| Frequency response | 36-40k Hz | 28-23k Hz |
|---|
| Sensitivity | 87 dB | 94 dB |
|---|
| Impedance | 6 ohms | 8 ohms |
|---|
| Power range | 30-225 watts | up to 225 watts |
|---|
| Weight | 29.09kg / 64lbs | 20.45kg / 45lbs |
|---|
| Dimensions (H x W x D) | 41" x 11-15/16" x 13-15/16"
1042.0 x 304.0 x 355.0mm | 40-3/8" x 8-5/16" x 14-15/16"
1026.0 x 212.0 x 380.0mm |
|---|
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
Both Performa4 F345 and Concord are 2-way speakers.
Revel Performa4 F345KLH Concord
TweeterMidrangeWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Revel Performa4 F345 |
KLH Concord |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
3 x 5.25-inch
|
2 x 6.5-inch
|
Performa4 F345 features a 1" Hard-Dome Tweeter and 3 x 5.25" Micro Ceramic Composite (MCC) Woofer. On the other hand, the Concord features a 1" anodized aluminum Tweeter and 2 x 6.5" Kevlar Woofer.
Frequency Response
Performa4 F345 has a frequency range of 36-40k Hz whereas Concord has a frequency range of 28-23k Hz. With a minimum frequency of 28Hz, the Concord can go significantly deeper on the low side and provide stronger bass compared to the Performa4 F345's min frequency of 36Hz.
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
Performa4 F345 is a 6 ohms speaker compared to the Concord which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. Performa4 F345 sensitivity is rated at 87 dB and the Concord's is rated at 94 dB. This 7 dB difference makes the KLH Concord a more sensitive speaker compared to Revel Performa4 F345, 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.
Both handle the same maximum of 225 watts RMS, though Performa4 F345 is rated 30-225 watts and Concord up to 225 watts.
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.
Input Type and Bi-Amping / Bi-Wiring
Performa4 F345 features Binding post posts which make bi-amping or bi-wiring possible. Concord has a 5-Way post which doesn't feature bi-amping/bi-wiring.
KLH Concord's 5-Way post terminals
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 Revel Performa4 F345's and KLH Concord's external dimensions. Revel Performa4 F345 has external dimensions of 1042.0 x 304.0 x 355.0mm (41inch x 11-15/16inch x 13-15/16inch) whereas KLH Concord has external dimensions of 1026.0 x 212.0 x 380.0mm (40-3/8 x 8-5/16 x 14-15/16inch).
KLH Concord is 92mm narrower and 16mm shorter than Revel Performa4 F345 but it is also 25mm deeper.
Below you can see the front view size comparison of Revel Performa4 F345 and KLH Concord in scale.
Comparison image of Revel Performa4 F345 and KLH Concord 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 Revel Performa4 F345 is approximately 1079.2cm2 / 167.3inch2 and base area of the KLH Concord is approximately 805.6cm2 / 124.9inch2. The Performa4 F345 requires 34% more surface area than the Concord which gives it a small disadvantage 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 Revel Performa4 F345 weighs 29.09kg / 64lbs and the KLH Concord weighs 20.45kg / 45lbs. This makes the Performa4 F345 42% heavier than the Concord.
Here is a comparison of how Performa4 F345 and Concord's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
What's in the Box of Revel Performa4 F345?
Here are the items that are included inside the box of Performa4 F345:
- Floorstanding loudspeaker
- Grille
- 2 Terminal jumpers (pre-installed)
- Four M8 Spikes
- 4 Nuts
- 4 Discs
- Quick Start Guide
What's in the Box of KLH Concord?
Here are the items that come with the Concord:
- Floorstanding loudspeaker
- Grille
- 4 Spike feet (w/ locking nut attached)
- 4 Protective discs
- 4 Rubber feet
- Port plug
- Manual
- ATTENTION! note
 Number of Woofers |
3
vs
2
|
More woofers |
 High Frequency Response |
40k Hz
vs
23k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Sensitivity |
94 dB
vs
87 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
|
Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
|
Low Frequency Response |
28 Hz
vs
36 Hz
|
Generates deeper bass |
 Height |
1026mm
vs
1042mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
805cm2
vs
1079cm2
|
Takes less floor space |
 Price per pair* |
1000USD
vs
4998USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Revel Performa4 F345 |
KLH Concord |
| Brand |
Revel |
KLH |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
30-225 watts |
up to 225 watts |
| Sensitivity |
87 dB |
94 dB |
| Impedance |
6 ohms |
8 ohms |
| Frequency Response |
36-40k Hz |
28-23k Hz |
Drivers |
|
|
| Woofer Quantity |
3 |
2 |
| Woofer Size |
5.25" |
6.5" |
| Woofer Composition |
Micro Ceramic Composite (MCC) |
Kevlar |
| Woofer Surround Material |
Rubber |
Butyl Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Hard-Dome |
n/a |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
5.25" |
No |
Physical Specs |
|
|
| Height |
1042.0mm (41") |
1026.0mm (40.4") |
| Width |
304.0mm (12") |
212.0mm (8.3") |
| Depth |
355.0mm (14") |
380.0mm (15") |
| Weight |
29.09kg (64lbs) |
20.45kg (45lbs) |
| Enclosure |
|
Bass Reflex |
| Finish |
MDF/Wood Veneer |
MDF/Wood-grain vinyl |
| Available Colors |
Black |
Black |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
5 Years |
10 Years |
| Labor Warranty |
5 Years |
10 Years |
These sit in different price classes - Revel Performa4 F345 costs roughly 5x what KLH Concord does. Expect it to lead on paper; the question is whether the gap is audible enough in your room to be worth it.
| Area | Better | Why |
|---|
| Bass | B | KLH Concord digs deeper - 28Hz against 36Hz. A subwoofer would even that out. |
| Amplifier needs | B | KLH Concord is more sensitive (94dB vs 87dB), so it goes louder on the same amplifier. |
| Amplifier match | B | KLH Concord is the easier load at 8 ohms. |
| Headroom | evenly matched | Similar power handling (225W vs 225W). |
| Size | depends | KLH Concord is easier to place; Revel Performa4 F345 is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | A | Revel Performa4 F345: bi-amping. |
| Price | B | KLH Concord is cheaper - $1,000 against $4,998, about 80% less; arguably a different class. |
A Revel Performa4 F345 B KLH Concord
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?
KLH Concord is the easier recommendation: it leads on most of the measured areas and costs less. Take Revel Performa4 F345 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 36Hz anyway, so judge these on the other rows instead. If your amplifier is modest, vintage or valve-based, KLH Concord is the safer partner - the other will want more current or more watts to sound its best.
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.