How to match speakers with AVR

[Midssa]

I am going to buy a Yamaha YHT-1840 5.1 HTIB system with small speakers. But I want to change front left and front right speakers to big speakers. Because I used to listen music every day. This 5.1 HTIB home theater system comes with Yamaha HTR 2071 AV Receiver. I am planning to buy Polk Audio T50 floor standing speaker pair or Polk Audio T15 book shelf speaker pair. But I haven’t any idea which one compatible for the best performance with my AV Receiver. AV Receiver and Speakers technical details as below.

Yamaha HTR 2071 AV Receiver


Audio Section

Rated Output Power (2-channel driven)
• (20 Hz to 20 kHz, 0.09% THD, 6 Ω)
– Front L/R 70 W+70 W
• [Canada model]
(1 kHz, 0.9% THD, 6 Ω)
– Front L/R 85 W+85 W
– Center 85 W
– Surround L/R 85 W+85 W
(50Hz, 0.9% THD, 6 Ω)
– Subwoofer 15 W

Rated Output Power (1-channel driven)
• (1 kHz, 0.9% THD, 6 Ω)
– Front L/R 100 W/ch
– Center 100 W/ch
– Surround L/R 100 W/ch
• (50Hz, 0.9% THD, 6 Ω)
– Subwoofer 15 W

Maximum Effective Output Power (1-channel driven)
• [Canada model] (1 kHz, 10% THD, 6 Ω)
– Front L/R, Center, Surround L/R, Subwoofer 145 W/ch
• [Other models] (1 kHz, 10% THD, 6 Ω)
– Front L/R, Center, Surround L/R, Subwoofer 135 W/ch

Dynamic Power (IHF)
• [Canada model]
– Front L/R (8/6/4/2 Ω) 110/130/160/180 W
• [Other models]
– Front L/R (6/4/2 Ω) 110/130/150 W

Damping Factor
• Front L/R, 20 Hz to 20 kHz, 8 Ω 100 or more

Input Sensitivity / Input Impedance
• AUDIO 4 etc. (1 kHz, 100 W/6 Ω) 200 mV/47 kΩ

Maximum Input Signal
• AUDIO 4 etc. (1 kHz, 0.5% THD, Effect On) 2.3 V

Output Level / Output Impedance
• SUBWOOFER 1 V/1.2 kΩ

Headphone Jack Rated Output / Impedance
• AUDIO 4 etc. (1 kHz, 50 mV, 8 Ω) 100 mV/470 Ω

Frequency Response
• AUDIO 4 etc. to Front (10 Hz to 100 kHz) +0/-3 dB

Signal to Noise Ratio (IHF-A Network)
• AUDIO 4 etc. (Input 1 kΩ Shorted, Speaker Out) 110 dB or more

Residual Noise (IHF-A Network)
• Front L/R (Speaker Out) 150 μV or less

Channel Separation
• AUDIO 4 etc. (Input 1 kΩ Shorted, 1 kHz/10 kHz) 70 dB/50 dB or more

Volume Control
• Range MUTE, -80 dB to +16.5 dB
• Step 0.5 dB
.............................................................................................................................

Polk Audio T50

• Height with Base
36.5" (92.71 cm)
• Width with Base
9.25" (23.5 cm)
• Depth with Base
8.75" (22.23 cm)
• Driver Enclosure Type
Bass Reflex
• Driver Complement
o (1) 1" (2.54 cm) d (Round) Silk Dome, Wave Guide - Tweeter
o (2) 6.5" (16.51 cm) d (Round) - Bass Radiator
o (1) 6.5" (16.51 cm) d (Round) Dynamic Balance - Mid/Woofer
AUDIO QUALITY
• Total Frequency Response
38Hz Hz → 24kHz kHz
• Nominal Impedance
8 ohms → 6 ohms
• Sensitivity (1 watt @ 1 meter)
90 dB
• Lower and Upper -3dB Limits
40 Hz → 30 kHz
CROSSOVER
• Peak Power Handling
150 watts
INPUTS
• Audio Inputs
• Speaker Inputs
(1) Set of 5-Way Binding Posts
...............................................................................................................

Polk Audio T15

• Height
10.63" (27 cm)
• Width
6.5" (16.51 cm)
• Depth
7.25" (18.42 cm)
• Driver Enclosure Type
Vented
• Driver Complement
o (1) 5.25" (13.34 cm) d (Round) Dynamic Balance mineral filled polymer composite cone driver - Mid/Woofer
o (1) 0.75" (1.91 cm) d (Round) Dynamic Balance silk/polymer composite dome - Tweeter
AUDIO QUALITY
• Total Frequency Response
45 Hz → 24 kHz
• Nominal Impedance
8 ohms → ohms
• Sensitivity (1 watt @ 1 meter)
89 dB
• Lower and Upper -3dB Limits
65 Hz → 20 kHz
INPUTS
• Audio Inputs
• Speaker Inputs
(1) Pair of 5-Way Binding Posts - Gold-Plated
EXTERNAL AMPLIFIER
• Recommended Amplifier Power Per Channel
20 watts → 100 watts
ON-SHELF, ON-STAND, OR ON-WALL MOUNT
• Mounting Type
Keyhole Hanger
• Available Orientations
Vertical

 

[americanaudiophile]

Either speaker is compatible. The larger tower will play very slightly louder than the bookshelf speakers at the same setting. Both are 8 ohms so that works on anything.
If you can replace the center speaker too that would be good especially if you use surround sound on your music.
The subwoofer that comes with the HTS may not work well with the towers since they may have more bass and play louder than it can.