In this review, we will be comparing R-3800-W II and R-3650-W II, two Passive In-wall speakers by Klipsch Let's have a brief look at the main features
of Klipsch R-3800-W II and Klipsch R-3650-W II first before getting into our more
detailed comparison.
Klipsch R-3800-W II Key Specs
- 2-way Design
- 1" Horn-loaded dome Tweeter
- 8" IMG Woofer
- 46-23kHz Frequency Response
- 93 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 50watts
- Dimensions (H x W x D): 374.0" x 9.1250" x 3.8750"( 374.0 x 232.0 x 99.0mm )
Klipsch R-3650-W II Key Specs
- 2-way Design
- 1" Horn-loaded dome Tweeter
- 6.5" IMG Woofer
- 60-23kHz Frequency Response
- 92 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 50watts
- Dimensions (H x W x D): 332.0" x 7.9375" x 3.6875"( 332.0 x 202.0 x 94.0mm )
R-3800-W II and R-3650-W II are members of Klipsch's Reference II series of speakers. Below you can find the loudspeakers from this series.
Klipsch Reference II Series History
What size room are the Klipsch R-3800-W II and Klipsch R-3650-W 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* |
Klipsch R-3800-W II |
Klipsch R-3650-W II |
| Near-field |
Good |
Good |
| Small Room |
Good |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Poor |
Poor |
| Very Large Room |
No way |
No way |
(* 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.)
In the following sections, we will get into more detail in order to better understand how the Klipsch R-3800-W II and Klipsch R-3650-W II compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Drivers
Both R-3800-W II and R-3650-W II are 2-way speakers.
| Driver |
Klipsch R-3800-W II |
Klipsch R-3650-W II |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 8-inch
|
1 x 6.5-inch
|
R-3800-W II features a 1" Horn-loaded dome Tweeter and 1 x 8" IMG Woofer . On the other hand, the R-3650-W II features a 1" Horn-loaded dome Tweeter and 1 x 6.5" IMG Woofer .
Frequency Response
R-3800-W II has a frequency range of 46-23kHz whereas R-3650-W II has a frequency range of 60-23kHz. With a minimum frequency of 46Hz, the R-3800-W II can go significantly deeper on the low side and provide stronger bass compared to the R-3650-W II's min frequency of 60Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the In-wall class in our database.
Low Frequency
In-wall Speakers
High Frequency
In-wall Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
R-3800-W II and R-3650-W II have the same Impedance of 8 ohms but where they differ is the sensitivity levels. R-3800-W II sensitivity is rated at 93 dB and the R-3650-W II's is at 92 dB. This 1 dB difference makes the Klipsch R-3800-W II a more sensitive speaker compared to Klipsch R-3650-W II, hence will play louder with the same amount of watts.
Sensitivity
In-wall Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
R-3800-W II and R-3650-W II has the same power range of up to 50 watts.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
R-3800-W II features Spring post type posts and R-3650-W II has a Spring post type posts. None of these speakers feature bi-amping/bi-wiring.
Physical Specs
Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Klipsch R-3800-W II's and Klipsch R-3650-W II's external dimensions. Klipsch R-3800-W II has external dimensions of 374.0 x 232.0 x 99.0mm ( 14.6875-inch x 9.1250-inch x 3.8750-inch) whereas Klipsch R-3650-W II has external dimensions of 332.0 x 202.0 x 94.0mm ( 13.0625-inch x 7.9375-inch x 3.6875-inch) .
Klipsch R-3800-W II is clearly the larger of the two speakers. Its body is 30mm wider, 42mm taller and 5mm deeper than Klipsch R-3650-W II.
What's in the Box of Klipsch R-3800-W II?
Here are the items that are included inside the box of R-3800-W II:
In-wall speakerWhite metal mesh grilleCardboard templateOwners Manual (En/Fr/Sp)
What's in the Box of Klipsch R-3650-W II?
Here are the items that come with the R-3650-W II:
In-wall speakerWhite metal mesh grilleCardboard templateOwners Manual (En/Fr/Sp)
Sensitivity 
Woofer Size 
Height 
Base Surface Area 
Price per pair*