3-Way Bookshelf Speaker: Featuring an
all-new Uni-Q driver array and 6.5" low-frequency bass driver, the 3-way KEF
R300 bookshelf loudspeaker delivers
clarity and realism with flawless precision and superb dynamics. Its
stylishly, uncluttered appearance beautifully complements its startling clear
highs, fast and clean midrange response, and accurate low-end frequencies.
All New Uni-Q Driver Array: The R300 bookshelf loudspeaker features
KEF's all new Uni-Q driver array with a 1" aluminum dome tweeter mounted in the
acoustic center of a 5" magnesium/aluminum midrange driver. With both the
tweeter and midrange driver operating as a single-point-source, you'll hear
detailed, accurate three-dimensional sound, which is dispersed more evenly
throughout your room.
- 1" Aluminum Dome Tweeter: At the center of the Uni-Q driver array
is a 1" aluminum dome tweeter with KEF's tangerine waveguide to help
disperse the higher frequencies evenly across a wider angle and flood the
room with a natural soundfield. The tweeter's large neodymium magnet and a
computer-optimized dome structure deliver articulate high frequencies with
flawless precision. In addition venting the tweeter reduces pressure behind
the dome, increasing midrange bandwidth and lowering distortion.
- 5" Magnesium/Aluminum Midrange Driver: Surrounding the 1"
aluminum dome tweeter is a 5" magnesium/aluminum midrange driver. The R300's
midrange response is amazingly fast and clean, thanks to the braced
magnesium/aluminum alloy cone, KEF's Z-flex surround smoothing the
transition to the front-panel, and a sturdy die-cast aluminum chassis that
prevents resonance from being transferred to the cabinet. In addition, large
voice coils increase the driver's power handling and dynamics, reducing
distortion and delivering exceptional vocal clarity.
6.5" Bass Driver: In addition to the a Uni-Q driver array, the R300
bookshelf loudspeaker also features an all-new 6.5" bass driver for lower
The combination of a massive vented magnet assembly and a large, lightweight
aluminum voice coil driving a light, stiff and strong hybrid aluminum cone
assures clean, deep and uncompressed bass output with superb dynamics and power
handling, plus fast and clean midrange response.
Computer Designed Crossover: The KEF R300 bookshelf loudspeaker
utilizes computer-designed crossovers (500Hz, 2.8kHz) that allow the level of each driver to be
fine-tuned for a smoother, flatter response.
Computational Fluid Dynamics (CFD) Port Design: Featuring a
Computational Fluid Dynamics (CFD) port design, the geometry of the bass reflex
port has been tuned to minimize turbulence at high levels, reducing noise and
low frequency compression. The port is located on the rear of the speaker
Note: Foam port plugs are included to insert into the
rear-firing ports, if the bass is to "boomy" due to room placement.
Non-Resonant Cabinet: The R Series speaker cabinet employs constrained
layer damping between the bracing and the enclosure walls and also the
front-baffle, to prevent the cabinet from vibrating and radiating sound. The
result is a non-resonant cabinet with no coloration. An acoustic transparent
grille is also included which magnetically attaches to the front of the speaker
Dual Binding Posts: On the rear of the speaker cabinet are dual sets of
heavy-duty, nickel-plated binding post terminals that will accept bare wire (up to
10AWG), pin-connectors, spade-lugs, and banana plugs (single only). Plastic
inserts must be removed from the binding posts to use banana plugs. Using the
dual sets of binding posts, you can bi-wire or bi-amp the speaker.
- Bi-Wiring: Bi-wiring can provide noticeable
improvements in the overall transparency of your loudspeakers. Run separate
speaker wires to the low & high/mid frequency drivers from a single
amplifier (the upper set of binding posts are for the high frequency
drivers; the lower set of binding posts are for the low frequency drivers).
- Bi-Amping: Bi-amping allows you to use separate
amplifiers for the high/mid & low frequency sections of your loudspeaker for
greater dynamic range & lower distortion. We recommend that your separate
amplifiers have identical gain to preserve the speaker's voicing balance.
Note: Unlike many other speakers with dual binding posts, the R Series
loudspeaker does not use jumper straps or leads between the high frequency and
low frequency terminals. Instead there are two dials (labeled "Link") for the
positive and negative high and low frequency terminals which can be
adjusted to either connect the high and low frequency terminals together to
power the speaker off a single amplifier channel (default setting) or disconnect
the high and low frequency terminals from one another in order to bi-amp the
high and low frequency drivers separately.
Mounting & Placement Options: The bookshelf speaker can simply be placed
on a stand, table-top, shelf, or other flat-surface. The included self-adhesive
rubber feet protect your furniture and add approximately 0.1875" to the overall
height of the speaker. A pair of speakers should be positioned 6' to 10' apart
and placed between 18" to 24" off the floor. They should be positioned at least
9" from the back wall due to their rear-firing port and 39" from side walls. The
speakers can be "toed-in" or angled inward toward the main listening area to
improve stereo imaging and soundstage.
Note: There are no included brackets, keyhole slots, or
threaded inserts to accommodate wall mounting.
R Series: The R Series features many
of KEF's latest innovations in premium hi-fi and home theatre loudspeaker
technology. Stunningly fluent Uni-Q driver arrays combine with potent new bass
drivers and many ingenious refinements to create a rich, spacious, accurate
sound. The R Series consists of a three floorstanding speakers (R500/R700/R900),
two bookshelf speakers (R100/R300),
two center speakers (R200c/R600c),
and two surround speakers (R50 Dolby Atmos/R800ds Dipole) - all sold separately.
Optional Powered Subwoofer: A KEF
Kube series powered subwoofer (sold separately) is the perfect addition to
the Q Series loudspeakers.