In this review, we will be comparing specifications of S20 and RTi A3, two Bookshelf cameras by Polk Audio.
Let's have a brief look at the main features of Polk S20 and Polk RTi A3 before getting into our more detailed comparison.
Let's read on the following sections in order to better understand in detail how Polk S20 and Polk RTi A3 compares and hopefully end up with enough arguments to decide which one is better for you.
Both S20 and RTi A3 are 2-way speakers. S20 features a 1" Terylene high-res dome Tweeter and 1 6.5" Mica-reinforced polypropylene Woofer . On the other hand, RTi A3 features a 1" silk polymer composite Dome Tweeter and 1 6.5" Polymer composite Woofer with a Crossover frequency at 2800 Hz.
S20 has a frequency range of 39-40k Hz whereas RTi A3 has a frequency range of 50-26k Hz.
Impedance and Sensitivity
S20 and RTi A3 has the same Impedance of 8 ohms but where they differ is the sensitivity levels. S20 sensitivity is rated at 88 dB and RTi A3's is at 89 dBd B.
S20 has a power range of 20-125 watts RMS whereas RTi A3 has a power range of 20-150 watts.
Input Type and Bi-Amping / Bi-Wiring
RTi A3 features Pair of Dual 5-way Binding Posts - Gold-Plated posts which makes bi-amping or bi-wiring possible. S20 has a 5-way post which doesn't feature b-amping/bi-wiring.
Cabinet Type and Port Position