The latest range from one of the world’s most ubiquitous speaker companies, Polk Audio, is the RTi 2008 series. The three-model RTi 2008 series updates the original RTi designs with new cabinets built using Polk’s “Damped Asymmetric Hex Laminate Isolation (DAHLI)” curved sidewall construction system for a more rigid enclosure with less resonance.
The RTi A5 ($949.90/pr) is the smallest model of the range, standing 40.25” tall. It uses two 6.5” “Dynamic Balance” Polymer/Mica Composite midranges augmented by two ports tuned for midrange and bass frequencies, and a 1” Silk Polymer tweeter. The step-up RTi A7 ($1149.90/pr) stands 42.25” tall and uses two 7” Polymer Composite woofers with front and rear bass ports, a single 6.5” Dynamic Balance midrange driver with a midrange port, and a 1” Silk Polymer tweeter. The top-of-the-range RTi A9 ($1749.90/pr) stands 48-5/8” tall, and uses three 7” Polymer Composite woofers and two 5.25” Dynamic Balance midranges with the same port system as the RTi A7, and a single 1” Silk Polymer tweeter mounted between the midranges in a D’Appolito configuration. All three models are available in either cherry or black wood veneer.
Polk Audio The RTi A9 Specifications
Driver Complement
Subwoofer 3 – 7" Diameter (17.78cm)
P
olymer Composite with Rubber Surround
Midrange 2 – 5-1/4" Diameter (13.34cm)
Polymer Composite Dynamic Balance with rubber surround
Tweeter 1 – 1" Diameter (2.54cm)
Silk Polymer Composite Dome
Electrical
Overall Frequency Response 18Hz-27kHz
Lower -3dB Limit 30Hz
Upper -3dB Limit 26kHz
Nominal Impedance 8 ohms
Recommended Amplifier Power 50-500 w/channel
Efficiency 90 dB
Inputs Dual (bi-amp)5-way binding posts
Dimensions
Cabinet Size 48-5/8" H x 8-7/8" W x 21-3/8" D
(123.51cm H x 22.54cm W x 54.29cm D)
Enclosure Type: (mid-high array) Sealed
Enclosure Type: (subwoofer) Ported via PowerPort Plus
Polk Audio The RTi A7 Specifications
Driver Complement
Subwoofer 2 – 7" Diameter (17.78cm)
Polymer Composite with Rubber Surround
Midrange 1 – 6-1/2" Diameter (16.51cm)
Polymer Composite Dynamic Balance with rubber surround
Tweeter 1 – 1" Diameter (2.54cm)
Silk Polymer Composite Dome
Electrical
Overall Frequency Response 20Hz-27kHz
Lower -3dB Limit 35Hz
Upper -3dB Limit 26kHz
Nominal Impedance 8 ohms
Recommended Amplifier Power 20-300 w/channel
Efficiency 89 dB
Inputs Dual (bi-amp)5-way binding posts
Dimensions
Cabinet Size 42-1/4" H x 8-7/8" W x 17-7/8" D
(107.31cm H x 22.54cm W x 45.40cm D)
Enclosure Type: (mid-high array) Sealed
Enclosure Type: (subwoofer) Ported via PowerPort Plus
Polk Audio The RTi A5 Specifications
Driver Complement
Mid/Woofer 2 – 6-1/2" Diameter (16.51cm)
Polymer/Mica Composite cone with rubber surround
Tweeter 1 – 1" Diameter (2.54cm)
Silk Polymer Composite Dome
Electrical
Overall Frequency Response 30Hz-27kHz
Lower -3dB Limit 40Hz
Upper -3dB Limit 26kHz
Nominal Impedance 8 ohms
Recommended Amplifier Power 20-250 w/channel
Efficiency 90 dB
Inputs 5-way binding posts
Dimensions
Cabinet Size 40-1/4" H x 8-7/16" W x 15-3/4" D
(102.23cm H x 21.43cm W x 40.01cm D)
Enclosure Type Vented with PowerPort and Arc Port
Source: Polk Audio
