In this review, we will be comparing Studio 630 and Studio 620, two Passive Bookshelf speakers by JBL.
Let's have a brief look at the main features
of JBL Studio 630 and JBL Studio 620 first before getting into our more
detailed comparison.
| Key Specs | JBL Studio 630 | JBL Studio 620 |
|---|
| Brand | JBL
United States · founded 1946 | JBL
United States · founded 1946 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" High Frequency Compression | 1" High Frequency Compression |
|---|
| Woofer | 6.25" PolyPlas | 5.25" PolyPlas |
|---|
| Frequency response | 45-40k Hz | 50-40k Hz |
|---|
| Sensitivity | 85 dB | 84 dB |
|---|
| Impedance | 6 ohms | 6 ohms |
|---|
| Power range | up to 150 watts | up to 100 watts |
|---|
| Weight | 9.02kg / 19.8lbs | 6.88kg / 15.1lbs |
|---|
| Dimensions (H x W x D) | 14.6" x 9-1/16" x 11-1/16"
372.0 x 230.0 x 280.0mm | 12.3" x 7-1/2" x 9-1/2"
312.0 x 190.0 x 240.0mm |
|---|
Studio 630 and Studio 620 are members of JBL's Studio series of speakers. Below you can find the loudspeakers from this series.
JBL Studio Series
History
What size room are the JBL Studio 630 and JBL Studio 620 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 Studio 630 |
JBL Studio 620 |
| 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 Studio 630 and Studio 620 are 2-way speakers.
JBL Studio 630JBL Studio 620
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 630 |
JBL Studio 620 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.25-inch
|
1 x 5.25-inch
|
Studio 630 features a 1" High Frequency Compression Tweeter and 1 x 6.25" PolyPlas Woofer. On the other hand, the Studio 620 features a 1" High Frequency Compression Tweeter and 1 x 5.25" PolyPlas Woofer.
Frequency Response
Studio 630 has a frequency range of 45-40k Hz whereas Studio 620 has a frequency range of 50-40k Hz. With a minimum frequency of 45Hz, the Studio 630 can go significantly deeper on the low side and provide stronger bass compared to the Studio 620's min frequency of 50Hz.
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
Studio 630 and Studio 620 have the same Impedance of 6 ohms but where they differ is the sensitivity levels. Studio 630 sensitivity is rated at 85 dB and the Studio 620's is at 84 dB. This 1 dB difference makes the JBL Studio 630 a more sensitive speaker compared to JBL Studio 620, hence will play louder with the same amount of watts.
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.
Studio 630 can handle a max power of 150 watts RMS, whereas Studio 620 has a max power handling value of 100 watts RMS, 50 watts less than the Studio 630.
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 630 features 5-Way post type posts and Studio 620 has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both Studio 630 and Studio 620 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 JBL Studio 630's and JBL Studio 620's external dimensions. JBL Studio 630 has external dimensions of 372.0 x 230.0 x 280.0mm (14.6 x 9-1/16inch x 11-1/16inch) whereas JBL Studio 620 has external dimensions of 312.0 x 190.0 x 240.0mm (12.3 x 7-1/2inch x 9-1/2inch).
JBL Studio 630 is clearly the larger of the two speakers. Its body is 40mm wider, 60mm taller and 40mm deeper than JBL Studio 620.
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 630 is approximately 644.0cm2 / 99.8inch2 and base area of the JBL Studio 620 is approximately 456.0cm2 / 70.7inch2. The Studio 630 requires 41% more surface area than the Studio 620 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 JBL Studio 630 weighs 9.02kg / 19.8lbs and the JBL Studio 620 weighs 6.88kg / 15.1lbs. This makes the Studio 630 31% heavier than the Studio 620.
Here is a comparison of how Studio 630 and Studio 620'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 Studio 630?
Here are the items that are included inside the box of Studio 630:
- 2 x JBL Studio 630 Bookshelf Loudspeaker
- 1 x Owner’s Manual
- 1 x Warranty Card
- 8 x Feet Pads
What's in the Box of JBL Studio 620?
Here are the items that come with the Studio 620:
- 2 x JBL Studio 630 Bookshelf Loudspeaker
- 1 x Owner’s Manual
- 1 x Warranty Card
- 8 x Feet Pads
 Max Input Power |
150 watts
vs
100 watts
|
Handle more power from your amplifier |
 Sensitivity |
85 dB
vs
84 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
6.25 inches
vs
5.25 inches
|
Larger woofer |
|
Low Frequency Response |
45 Hz
vs
50 Hz
|
Generates deeper bass |
 Height |
312mm
vs
372mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
456cm2
vs
644cm2
|
Takes less floor space |
 Price per pair* |
600USD
vs
700USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
JBL Studio 630 |
JBL Studio 620 |
| Brand |
JBL |
JBL |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
up to 150 watts |
up to 100 watts |
| Sensitivity |
85 dB |
84 dB |
| Impedance |
6 ohms |
6 ohms |
| Frequency Response |
45-40k Hz |
50-40k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.25" |
5.25" |
| Woofer Composition |
PolyPlas |
PolyPlas |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
High Frequency Compression |
High Frequency Compression |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
372.0mm (14.6") |
312.0mm (12.3") |
| Width |
230.0mm (9.1") |
190.0mm (7.5") |
| Depth |
280.0mm (11") |
240.0mm (9.4") |
| Weight |
9.02kg (19.8lbs) |
6.88kg (15.1lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood veneer |
MDF/Wood veneer |
| Available Colors |
Wood, Dark Wood |
Wood, Dark Wood |
| Mounting Bracket |
No |
No |
| 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 JBL's Studio series, so they share a family sound. It comes down to size, output and price.
| Area | Better | Why |
|---|
| Bass | A | JBL Studio 630 digs deeper - 45Hz against 50Hz. A subwoofer would even that out. |
| Amplifier needs | evenly matched | Similar sensitivity (85dB vs 84dB) - both want much the same power. |
| Headroom | A | JBL Studio 630 takes more power (150W vs 100W) - more in hand in a big room. |
| Size | depends | JBL Studio 620 is easier to place; JBL Studio 630 is bigger, which usually goes with fuller bass. Your room decides. |
| Price | B | JBL Studio 620 is cheaper - $600 against $700, about 14% less. |
A JBL Studio 630 B JBL Studio 620
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: JBL Studio 630 measures better, JBL Studio 620 costs about about 17% 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 50Hz anyway, which makes the cheaper JBL Studio 620 much easier to justify. Match it to your room: we rate JBL Studio 630 the better fit for a mid-size room and a large room, and JBL Studio 620 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.