Klipsch Reference R-51PM is a 2-way Powered Bass Reflex Bookshelf speaker by Klipsch. R-51PM's built-in amplifier provides 120-watt RMS( 240-watt Peak). The built-in power amplifier saves space & eliminates the need to connect Klipsch R-51PM to a stereo receiver or external power amp. It features a 1.0" Tractrix Horn Tweeter and 1 x 5.25" Copper-spun IMG Woofer. The speaker has a frequency range of 68-21k Hz. Klipsch R-51PM has an MSRP of 599$ per pair.
Klipsch's Reference (R) Bookshelf Series of Loudspeakers
R-51PM is a member of Klipsch's Reference (R) Bookshelf series of Powered speakers. Below you can see the main specs of these speakers.
Klipsch Reference (R) Bookshelf Series Speakers
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Frequency Response of the Klipsch R-51PM Speaker
Klipsch R-51PM has a Frequency response range of 68-21k Hz at ±3dB. With a minimum frequency of 68 Hz, it is hard to expect a strong bass response from R-51PM so depending on your use case, using a subwoofer will significantly help to widen the response range.
To focus on the subwoofers that are in a similar price range with Klipsch R-51PM, check out the Powered Subwoofers under $750. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how R-51PM's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
Klipsch R-51PM's Aluminum LTS Tractrix Horn Tweeter
Crossover frequency of the Klipsch R-51PM?
The Crossover frequency of the R-51PM is set to 1663Hz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.
Klipsch R-51PM Back View
Handheld Remote
Klipsch R-51PM comes with a handheld remote which is obviously very useful to control your powered speakers from a distance.
Bluetooth Connectivity
Klipsch R-51PM employs Built-in 3.0 Bluetooth for wireless music streaming from your Bluetooth-enabled devices such as Apple iPod/iPhone/iPad, Android smartphone/tablet, Windows PC, Mac computers/laptops. R-51PM can playback up to 24-bit / 96 kHz with compatible devices.
Inputs and Outputs
- 3.5mm Minijack Input
- RCA Input
- USB Port: USB-B
- Phono Input
- Wired Subwoofer Output
- Digital Input: Optical
Klipsch R-51PM Connections
Klipsch R-51PM External Dimensions and Weight
Klipsch R-51PM has external dimensions of (Height x Width x Depth) 13 x 7.0625 x 10.25inch (330.2 x 179.4 x 260.3mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of Klipsch R-51PM is approximately 467.0cm2 / 72.4inch2.
WeightThe Klipsch R-51PM weighs 4.80kg / 10.6lbs per piece. Here is a comparison of how R-51PM's weight compares with the average, max and min weights in its class.
Weight
All Bookshelf Speakers
Weight
Bookshelf Speakers under $750
Cabinet type and Materials
Klipsch R-51PM has a
Bass Reflex type cabinet. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
Port Position
Klipsch R-51PM is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe.
Wall Mounting
R-51PM doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Does the Klipsch R-51PM come with a Grille?
R-51PM comes with grilles in Black color choices. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible.
Klipsch R-51PM with Grille
What's in the Box of Klipsch R-51PM?
Here are the items that are included inside the box of R-51PM:
Powered speaker (right)Passive speaker (left)2 Grilles68-inch AC power cordRemote control2
Klipsch R-51PM - What's in the Box
Recommended Accessories
Here is a list of accessories that we think you may need for the Klipsch Reference R-51PM.
- Vibration Isolators: IsoAcoustics isolators more affordable options too.
- Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.
- Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.
User's Manual
For more information about how to setup, use and maintain the Klipsch Reference R-51PM, use the direct link below to download the official manual document:
Download User Manual for Klipsch R-51PM
Official Product Page
Official manufacturer's product page for the Klipsch Reference R-51PM speaker can be found below:
Official Product Page for Klipsch R-51PM
Warranty
1 Year of parts warranty and 1 Year of labor warranty is generally provided by the manufacturer.