In this review, we will be comparing Stage 250B and XT15, two Passive Bookshelf speakers from JBL and Polk Audio.
Let's have a brief look at the main features
of JBL Stage 250B and Polk XT15 first before getting into our more
detailed comparison.
| Key Specs | JBL Stage 250B | Polk XT15 |
|---|
| Brand | JBL
United States · founded 1946 | Polk Audio
United States · founded 1972 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" Hard-Dome | 1" Soft-Dome |
|---|
| Woofer | 5.25" Polycellulose | 5.25" Bi-laminate paper |
|---|
| Frequency response | 55-25k Hz | 48-40k Hz |
|---|
| Sensitivity | 86 dB | 86 dB |
|---|
| Impedance | 6 ohms | 8 ohms |
|---|
| Power range | 20-150 watts | 30-150 watts |
|---|
| Weight | 5.64kg / 12.4lbs | 4.09kg / 9lbs |
|---|
| Dimensions (H x W x D) | 12-5/8" x 7-15/16" x 9-1/2"
321.0 x 202.0 x 242.0mm | 10-5/8" x 6-9/16" x 7-3/16"
270.0 x 167.0 x 183.0mm |
|---|
What size room are the JBL Stage 250B and Polk XT15 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* |
JBL Stage 250B |
Polk XT15 |
| Near-field |
Poor |
Poor |
| Small Room |
Average |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Average |
Average |
| 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.
Drivers
Both Stage 250B and XT15 are 2-way speakers.
JBL Stage 250BPolk XT15
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 Stage 250B |
Polk XT15 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 5.25-inch
|
Stage 250B features a 1" Hard-Dome Tweeter and 1 x 5.25" Polycellulose Woofer. On the other hand, the XT15 features a 1" Soft-Dome Tweeter and 1 x 5.25" Bi-laminate paper Woofer.
Frequency Response
Stage 250B has a frequency range of 55-25k Hz whereas XT15 has a frequency range of 48-40k Hz. With a minimum frequency of 48Hz, the XT15 can go significantly deeper on the low side and provide stronger bass compared to the Stage 250B's min frequency of 55Hz.
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
Stage 250B is a 6 ohms speaker compared to the XT15 which has a nominal impedance of 8 ohms.
On the other hand, they have the same sensitivity of 86 dBdB.
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.
Both handle the same maximum of 150 watts RMS, though Stage 250B is rated 20-150 watts and XT15 30-150 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
Stage 250B features 5-Way post type posts and XT15 has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.
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 Stage 250B's and Polk XT15's external dimensions. JBL Stage 250B has external dimensions of 321.0 x 202.0 x 242.0mm (12-5/8inch x 7-15/16inch x 9-1/2inch) whereas Polk XT15 has external dimensions of 270.0 x 167.0 x 183.0mm (10-5/8 x 6-9/16 x 7-3/16inch).
JBL Stage 250B is clearly the larger of the two speakers. Its body is 35mm wider, 51mm taller and 59mm deeper than Polk XT15.
Below you can see the front view size comparison of JBL Stage 250B and Polk XT15 in scale.
Comparison image of JBL Stage 250B and Polk XT15 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 JBL Stage 250B is approximately 488.8cm2 / 75.8inch2 and base area of the Polk XT15 is approximately 305.6cm2 / 47.4inch2. The Stage 250B requires 60% more surface area than the XT15 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 JBL Stage 250B and Polk XT15 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 JBL Stage 250B weighs 5.64kg / 12.4lbs and the Polk XT15 weighs 4.09kg / 9lbs. This makes the Stage 250B 38% heavier than the XT15.
Here is a comparison of how Stage 250B and XT15's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of JBL Stage 250B?
Here are the items that are included inside the box of Stage 250B:
- 2 Bookshelf loudspeakers 2 Grilles 8 Self-adhesive rubber pads Quick Start Guide Important Safety Instructions
What's in the Box of Polk XT15?
Here are the items that come with the XT15:
- 2 Bookshelf loudspeakers
- 2 Grilles (attached)
- 8 Self-adhesive rubber feet
- Owners Manual
- Online Product Registration
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Low Frequency Response |
48 Hz
vs
55 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
25k Hz
|
Generates higher frequency |
 Height |
270mm
vs
321mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
305cm2
vs
488cm2
|
Takes less floor space |
 Price per pair* |
199USD
vs
399USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
JBL Stage 250B |
Polk Audio Monitor XT15 |
| Brand |
JBL |
Polk Audio |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
20-150 watts |
30-150 watts |
| Sensitivity |
86 dB |
86 dB |
| Impedance |
6 ohms |
8 ohms |
| Frequency Response |
55-25k Hz |
48-40k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5.25" |
5.25" |
| Woofer Composition |
Polycellulose |
Bi-laminate paper |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Hard-Dome |
Soft-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
n/a |
Physical Specs |
|
|
| Height |
321.0mm (12.6") |
270.0mm (10.6") |
| Width |
202.0mm (8") |
167.0mm (6.6") |
| Depth |
242.0mm (9.5") |
183.0mm (7.2") |
| Weight |
5.64kg (12.4lbs) |
4.09kg (9lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
MDF, Vinyl |
| Available Colors |
Espresso,Latte |
Black |
| Mounting Bracket |
|
No |
| Recommended Stand Height |
n/a |
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 |
These sit in different price classes - JBL Stage 250B costs roughly 2x what Polk XT15 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 | Polk XT15 digs deeper - 48Hz against 55Hz. A subwoofer would even that out. |
| Amplifier needs | evenly matched | Similar sensitivity (86dB vs 86dB) - both want much the same power. |
| Amplifier match | B | Polk XT15 is the easier load at 8 ohms. |
| Headroom | evenly matched | Similar power handling (150W vs 150W). |
| Size | depends | Polk XT15 is easier to place; JBL Stage 250B is bigger, which usually goes with fuller bass. Your room decides. |
| Price | B | Polk XT15 is cheaper - $199 against $399, about 50% less; arguably a different class. |
A JBL Stage 250B B Polk XT15
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?
Polk XT15 is the easier recommendation: it leads on most of the measured areas and costs less. Take JBL Stage 250B 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 55Hz anyway, so judge these on the other rows instead. In a large or open-plan room, JBL Stage 250B has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Polk XT15 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.