In this review, we will be comparing R-3650-W II and RC65i, two Passive In-wall speakers from Klipsch and Polk Audio.
Let's have a brief look at the main features
of Klipsch R-3650-W II and Polk Audio RC65i first before getting into our more
detailed comparison.
| Key Specs | Klipsch R-3650-W II | Polk Audio RC65i |
|---|
| Brand | Klipsch
United States · founded 1946 | Polk Audio
United States · founded 1972 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" Horn-loaded dome | 0.75" Hard-Dome |
|---|
| Woofer | 6.5" IMG | 6.5" Polypropylene |
|---|
| Frequency response | 60-23kHz | 60-20kHz |
|---|
| Sensitivity | 92 dB | 89 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | up to 50 watts | 20-100 watts |
|---|
| Dimensions (H x W x D) | 13.0625" x 7.9375" x 3.6875"
332.0 x 202.0 x 94.0mm | 10.7500" x 7.3125" x 2.4070"
274.0 x 186.0 x 62.0mm |
|---|
What size room are the Klipsch R-3650-W II and Polk Audio RC65i 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-3650-W II |
Polk Audio RC65i |
| Near-field |
Good |
Average |
| Small Room |
Good |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Poor |
Poor |
| Very Large Room |
No way |
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.
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Drivers
Both R-3650-W II and RC65i are 2-way speakers.
Klipsch R-3650-W IIPolk Audio RC65i
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Klipsch R-3650-W II |
Polk Audio RC65i |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
0.75-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 6.5-inch
|
R-3650-W II features a 1" Horn-loaded dome Tweeter and 1 x 6.5" IMG Woofer. On the other hand, the RC65i features a 0.75" Hard-Dome Tweeter and 1 x 6.5" Polypropylene Woofer.
Frequency Response
R-3650-W II has a frequency range of 60-23kHz whereas RC65i has a frequency range of 60-20kHz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the In-wall class in our database.
Low Frequency
In-wall 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
R-3650-W II and RC65i have the same Impedance of 8 ohms but where they differ is the sensitivity levels. R-3650-W II sensitivity is rated at 92 dB and the RC65i's is at 89 dB. This 3 dB difference makes the Klipsch R-3650-W II a more sensitive speaker compared to Polk Audio RC65i, 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. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
RC65i can handle a max power of 100 watts RMS, whereas R-3650-W II has a max power handling value of 50 watts RMS, 50 watts less than the RC65i.
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
R-3650-W II features Spring clip type posts and RC65i has a Spring clip 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 Klipsch R-3650-W II's and Polk Audio RC65i's external dimensions. 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) whereas Polk Audio RC65i has external dimensions of 274.0 x 186.0 x 62.0mm (10.7500-inch x 7.3125-inch x 2.4070-inch).
Klipsch R-3650-W II is clearly the larger of the two speakers. Its body is 16mm wider, 58mm taller and 32mm deeper than Polk Audio RC65i.
What's in the Box of Klipsch R-3650-W II?
Here are the items that are included inside the box of R-3650-W II:
- In-wall speaker
- White metal mesh grille
- Cardboard template
- Owners Manual (En/Fr/Sp)
What's in the Box of Polk Audio RC65i?
Here are the items that come with the RC65i:
- 2 White in-wall speakers
- 2 White grilles
- 1 Cardboard Mounting Template
- Owners Manual
- Online registration sheet
- Product Registration Card