In this review, we will be comparing Studio 680 and Concord, two Passive Floor-standing speakers from JBL and KLH.
Let's have a brief look at the main features
of JBL Studio 680 and KLH Concord first before getting into our more
detailed comparison.
| Key Specs | JBL Studio 680 | KLH Concord |
|---|
| Brand | JBL
United States · founded 1946 | KLH
United States · founded 1957 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" compression driver with HDI (High Definition Imaging) waveguide | 1" |
|---|
| Woofer | 2 x 6.5" PolyPlas | 2 x 6.5" Kevlar |
|---|
| Frequency response | 38-40k Hz | 28-23k Hz |
|---|
| Sensitivity | 88 dB | 94 dB |
|---|
| Impedance | 6 ohms | 8 ohms |
|---|
| Power range | up to 200 watts | up to 225 watts |
|---|
| Weight | 22.68kg / 49.9lbs | 20.45kg / 45lbs |
|---|
| Dimensions (H x W x D) | 40-3/4" x 8-15/16" x 12-1/16"
1036.0 x 228.0 x 307.0mm | 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 Studio 680 and Concord are 2-way speakers.
JBL Studio 680KLH Concord
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
JBL Studio 680 |
KLH Concord |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 6.5-inch
|
2 x 6.5-inch
|
Studio 680 features a 1" compression driver with HDI (High Definition Imaging) waveguide Tweeter and 2 x 6.5" PolyPlas Woofer. On the other hand, the Concord features a 1" anodized aluminum Tweeter and 2 x 6.5" Kevlar Woofer.
Frequency Response
Studio 680 has a frequency range of 38-40k 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 Studio 680's min frequency of 38Hz.
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
Studio 680 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. Studio 680 sensitivity is rated at 88 dB and the Concord's is rated at 94 dB. This 6 dB difference makes the KLH Concord a more sensitive speaker compared to JBL Studio 680, 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.
Concord can handle a max power of 225 watts RMS, whereas Studio 680 has a max power handling value of 200 watts RMS, 25 watts less than the Concord.
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
Studio 680 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.
JBL Studio 680's Binding post terminals allows Bi-amping or 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 JBL Studio 680's and KLH Concord's external dimensions. JBL Studio 680 has external dimensions of 1036.0 x 228.0 x 307.0mm (40-3/4-inch x 8-15/16-inch x 12-1/16-inch) 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 16mm narrower and 10mm shorter than JBL Studio 680 but it is also 73mm deeper.
Size, drawn to scale
Both speakers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same surface and pushed back to the same wall, so the deeper one visibly sticks out further.
KLH Concord needs about 15% more floor or shelf area. KLH Concord is 73mm deeper, so it stands that much further out from the wall.
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 JBL Studio 680 is approximately 700.0cm2 / 108.5inch2 and base area of the KLH Concord is approximately 805.6cm2 / 124.9inch2. The Studio 680 requires 13% less surface area than the Concord 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 JBL Studio 680 weighs 22.68kg / 49.9lbs and the KLH Concord weighs 20.45kg / 45lbs. This makes the Studio 680 11% heavier than the Concord.
Here is a comparison of how Studio 680 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 JBL Studio 680?
Here are the items that are included inside the box of Studio 680:
- Floorstanding loudspeaker
- Grille
- 4 Spike feet
- 4 Washers
- 4 Locking-collars
- 4 Foot pads
- 2 Jumper-straps (pre-installed)
- Owners Manual
- Warranty Card
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
 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 |
 Base Surface Area |
700cm2
vs
805cm2
|
Takes less floor space |
 Max Input Power |
225 watts
vs
200 watts
|
Handle more power from your amplifier |
 Sensitivity |
94 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Low Frequency Response |
28 Hz
vs
38 Hz
|
Generates deeper bass |
 Height |
1026mm
vs
1036mm
|
Easier to fit in smaller spaces |
 Price per pair* |
1000USD
vs
1198USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
JBL Studio 680 |
KLH Concord |
| Brand |
JBL |
KLH |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
up to 200 watts |
up to 225 watts |
| Sensitivity |
88 dB |
94 dB |
| Impedance |
6 ohms |
8 ohms |
| Frequency Response |
38-40k Hz |
28-23k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
PolyPlas |
Kevlar |
| Woofer Surround Material |
Rubber |
Butyl Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
compression driver with HDI (High Definition Imaging) waveguide |
n/a |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
n/a |
Physical Specs |
|
|
| Height |
1036.0mm (40.8") |
1026.0mm (40.4") |
| Width |
228.0mm (9") |
212.0mm (8.3") |
| Depth |
307.0mm (12.1") |
380.0mm (15") |
| Weight |
22.68kg (49.9lbs) |
20.45kg (45lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
MDF/Wood-grain vinyl |
| Available Colors |
Wood, Dark Wood |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
5 Years |
10 Years |
| Labor Warranty |
5 Years |
10 Years |
No single best speaker here - they are built to different priorities, and the right one depends on your room, your amplifier and what you listen to.
| Area | Better | Why |
|---|
| Bass | B | KLH Concord digs deeper - 28Hz against 38Hz. |
| Amplifier needs | B | KLH Concord is more sensitive (94dB vs 88dB), 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 (200W vs 225W). |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | A | JBL Studio 680: bi-amping. |
| Price | B | KLH Concord is cheaper - $1,000 against $1,198, about 17% less. |
A JBL Studio 680 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 JBL Studio 680 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 38Hz 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.