In this review, we will be comparing C 93 II and C 91 II, two Passive Bookshelf speakers by Jamo.
Let's have a brief look at the main features
of Jamo C 93 II and Jamo C 91 II first before getting into our more
detailed comparison.
| Key Specs | Jamo C 93 II | Jamo C 91 II |
|---|
| Brand | Jamo
Denmark · founded 1966 | Jamo
Denmark · founded 1966 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" Soft-Dome | 1" Soft-Dome |
|---|
| Woofer | 6" Composite | 4" Composite |
|---|
| Frequency response | 45-24k Hz | 65-24k Hz |
|---|
| Sensitivity | 86 dB | 86 dB |
|---|
| Impedance | 6 ohms | 6 ohms |
|---|
| Power range | 50-120 watts | 50-100 watts |
|---|
| Weight | 6.40kg / 14.1lbs | 4.10kg / 9lbs |
|---|
| Dimensions (H x W x D) | 13.7" x 7.8" x 10.1"
350.0 x 200.0 x 259.0mm | 10.4" x 6.7" x 7.5"
265.0 x 171.0 x 191.0mm |
|---|
C 93 II and C 91 II are members of Jamo's Concert 9 series of speakers. Below you can find the loudspeakers from this series.
Jamo Concert 9 Series
History
What size room are the Jamo C 93 II and Jamo C 91 II 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* |
Jamo C 93 II |
Jamo C 91 II |
| Near-field |
Poor |
Average |
| Small Room |
Average |
Good |
| Mid-size Room |
Good |
Average |
| Large Room |
Average |
Poor |
| Very Large Room |
Poor |
Bad |
(* 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.
Drivers
Both C 93 II and C 91 II are 2-way speakers.
Jamo C 93 IIJamo C 91 II
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Jamo C 93 II |
Jamo C 91 II |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6-inch
|
1 x 4-inch
|
C 93 II features a 1" Soft-Dome Tweeter and 1 x 6" Composite Woofer. On the other hand, the C 91 II features a 1" Soft-Dome Tweeter and 1 x 4" Composite Woofer.
Frequency Response
C 93 II has a frequency range of 45-24k Hz whereas C 91 II has a frequency range of 65-24k Hz. With a minimum frequency of 45Hz, the C 93 II can go significantly deeper on the low side and provide stronger bass compared to the C 91 II's min frequency of 65Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Bookshelf class in our database.
Low Frequency
Bookshelf 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
C 93 II and C 91 II have the same Impedance of 6 ohms and their sensitivity is also same at 88 dB.
Sensitivity
Bookshelf 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.
C 93 II can handle a max power of 120 watts RMS, whereas C 91 II has a max power handling value of 100 watts RMS, 20 watts less than the C 93 II.
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
C 93 II features 5-way post type posts and C 91 II has a 5-way post type posts. None of these speakers feature bi-amping/bi-wiring.
Jamo C 91 II's 5-way post terminals
Cabinet Type and Port Position
Both C 93 II and C 91 II 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 Jamo C 93 II's and Jamo C 91 II's external dimensions. Jamo C 93 II has external dimensions of 350.0 x 200.0 x 259.0mm (13.7 x 7.8 x 10.1inch) whereas Jamo C 91 II has external dimensions of 265.0 x 171.0 x 191.0mm (10.4 x 6.7 x 7.5inch).
Jamo C 93 II is clearly the larger of the two speakers. Its body is 29mm wider, 85mm taller and 68mm deeper than Jamo C 91 II.
Below you can see the front view size comparison of Jamo C 93 II and Jamo C 91 II in scale.
Comparison image of Jamo C 93 II and Jamo C 91 II 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 Jamo C 93 II is approximately 518.0cm2 / 80.3inch2 and base area of the Jamo C 91 II is approximately 326.6cm2 / 50.6inch2. The C 93 II requires 59% more surface area than the C 91 II which gives it a small disadvantage on placement in tight spaces.
Here is another comparison that shows both speakers on a BDI Octave Media Cabinet, next to a standard size amplifier and turntable in scale:
Size Comparison image of Jamo C 93 II and Jamo C 91 II on a Media Console
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 Jamo C 93 II weighs 6.40kg / 14.1lbs and the Jamo C 91 II weighs 4.10kg / 9lbs. This makes the C 93 II 56% heavier than the C 91 II.
Here is a comparison of how C 93 II and C 91 II's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Jamo C 93 II?
Here are the items that are included inside the box of C 93 II:
- 2 Bookshelf loudspeakers
- 2 Grilles
- 8 Self-adhesive rubber feet
- 4 Self-adhesive rubber bumpers
- User Manual
- Important Safety Instructions Warranty Information
What's in the Box of Jamo C 91 II?
Here are the items that come with the C 91 II:
- 2 Bookshelf loudspeakers
- 2 Grilles
- 8 Self-adhesive rubber feet
- 4 Self-adhesive rubber bumpers
- User Manual
- Important Safety Instructions Warranty Information
 Max Input Power |
120 watts
vs
100 watts
|
Handle more power from your amplifier |
 Sensitivity |
88 dB
vs
86 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
6 inches
vs
4 inches
|
Larger woofer |
|
Low Frequency Response |
45 Hz
vs
65 Hz
|
Generates deeper bass |
 Height |
265mm
vs
350mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
326cm2
vs
518cm2
|
Takes less floor space |
 Price per pair* |
459USD
vs
574USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Jamo Concert 9 Series C 93 II |
Jamo Concert 9 Series C 91 II |
| Brand |
Jamo |
Jamo |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
50-120 watts |
50-100 watts |
| Sensitivity |
86 dB |
86 dB |
| Impedance |
6 ohms |
6 ohms |
| Frequency Response |
45-24k Hz |
65-24k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6" |
4" |
| Woofer Composition |
Composite |
Composite |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-Dome |
Soft-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
350.0mm (13.8") |
265.0mm (10.4") |
| Width |
200.0mm (7.9") |
171.0mm (6.7") |
| Depth |
259.0mm (10.2") |
191.0mm (7.5") |
| Weight |
6.40kg (14.1lbs) |
4.10kg (9lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
MDF/Wood-grain |
| Available Colors |
White Oak,Black Ash |
White Oak,Black Ash |
| Mounting Bracket |
Keyhole |
Keyhole |
| Recommended Stand Height |
22-26" |
28-32" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |
Siblings in Jamo's Concert 9 series, so they share a family sound. It comes down to size, output and price.
| Area | Better | Why |
|---|
| Bass | A | Jamo C 93 II digs deeper - 45Hz against 65Hz. |
| Amplifier needs | A | Jamo C 93 II is more sensitive (88dB vs 86dB), so it goes louder on the same amplifier. |
| Headroom | evenly matched | Similar power handling (120W vs 100W). |
| Size | depends | Jamo C 91 II is easier to place; Jamo C 93 II is bigger, which usually goes with fuller bass. Your room decides. |
| Price | B | Jamo C 91 II is cheaper - $459 against $574, about 20% less. |
A Jamo C 93 II B Jamo C 91 II
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?
The usual trade-off: Jamo C 93 II measures better, Jamo C 91 II costs about about 25% more% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 65Hz anyway, which makes the cheaper Jamo C 91 II much easier to justify. Match it to your room: we rate Jamo C 93 II the better fit for a mid-size room and a large room, and Jamo C 91 II for near-field listening and a small room.
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.