What receiver do I need for the Reserve R400?

One rated for 8 Ω speakers. In our catalogue, Denon AVR-S570BT, Emotiva BasX A-700 and Yamaha RX500A are rated to drive it.

Is the Reserve R400 4 ohm or 8 ohm?

The Polk Reserve R400 has a nominal impedance of 8 Ω. Use a receiver or amplifier rated down to 8 Ω or lower.

How much power does the Reserve R400 need?

Polk recommends an amplifier of 40–200 W. Its sensitivity is 89 dB (2.83 V, 1 m). How much of that you use depends on how far you sit and how loud you listen, which the 3D editor works out for your room.

How low does the Reserve R400 go?

The Polk Reserve R400 is rated down to 48 Hz. Below that, a subwoofer takes over; where the bass actually lands depends on your room's modes.

How big is the Reserve R400?

The Polk Reserve R400 measures 615 × 196.6 × 350 mm (24.2 × 7.7 × 13.8 in, width × height × depth) and weighs 14.9 kg (32.8 lb).

Polk Reserve R400

Name: Polk Reserve R400
Brand: Polk
Price: 699.00 USD

Reserve series

The Polk Reserve R400 is a center channel speaker with 8 Ω impedance and 89 dB sensitivity. Every receiver and amp in our catalogue can drive it.

Impedance

8 Ω

What the receiver must be rated for

Sensitivity

89 dB

Higher is louder per watt

Amplifier power

40–200 W

Polk's recommendation

Bass extension

48 Hz

How low it plays

$699 each (MSRP, September 2026)

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Which receivers and amps can drive it?

What decides it is impedance: the Reserve R400 is 8 Ω, and the receiver or amp has to be rated for that.

Works
Receivers and amps rated for 8 Ω
29 in our catalogue

In its price range

All 29 receivers and amps we checked

Works29

Denon AVR-S570BT
5 amplified channels · 70 W at 8 Ω
Emotiva BasX A-700
7 channels · 110 W at 8 Ω
Yamaha RX500A
7 amplified channels · 70 W at 8 Ω
Denon AVR-S670H
5 amplified channels · 75 W at 8 Ω
Denon AVR-X1700H
7 amplified channels · 80 W at 8 Ω
Monoprice M7100X
7 channels · 90 W at 8 Ω
Denon AVR-S770H
7 amplified channels · 75 W at 8 Ω
Onkyo TX-NR6100
7 amplified channels · 100 W at 8 Ω
Yamaha RX-V6A
7 amplified channels · 100 W at 8 Ω
Crown XLS 1502
2 channels · 300 W at 8 Ω
Denon AVR-X1800H
7 amplified channels · 80 W at 8 Ω
Denon AVR-S970H
7 amplified channels · 90 W at 8 Ω
Onkyo TX-RZ30
9 amplified channels · 100 W at 8 Ω
Pioneer VSX-LX305
9 amplified channels · 100 W at 8 Ω
Onkyo TX-NR7100
9 amplified channels · 100 W at 8 Ω
Marantz Cinema 70s
7 amplified channels · 50 W at 8 Ω
Denon AVR-X2900H
7 amplified channels · 95 W at 8 Ω
Pioneer VSX-LX505
9 amplified channels · 120 W at 8 Ω
Emotiva XPA-2 Gen3
2 channels · 300 W at 8 Ω
Onkyo TX-RZ50
9 amplified channels · 120 W at 8 Ω
Denon AVR-X3800H
9 amplified channels · 105 W at 8 Ω
Denon AVR-X3900H
9 amplified channels · 105 W at 8 Ω
Monoprice Monolith 7X
7 channels · 200 W at 8 Ω
Emotiva XPA-5 Gen3
5 channels · 250 W at 8 Ω
Denon AVR-X4800H
9 amplified channels · 125 W at 8 Ω
Marantz Cinema 50
9 amplified channels · 110 W at 8 Ω
Denon AVR-X6800H
11 amplified channels · 140 W at 8 Ω
ATI AT525NC
5 channels · 200 W at 8 Ω
Parasound Halo A 21+
2 channels · 300 W at 8 Ω

Plan your room around the Reserve R400.

Draw your room in 3D, place the Reserve R400 and see how they sound at your seat, with every connection to your receiver checked. Designing is free.

Build it in your room

Reserve R400 specifications

Impedance: 8 Ω
Sensitivity: 89 dB (2.83 V, 1 m)
Low end: 48 Hz
Drivers: 1 × 25 mm, 2 × 165 mm
Size: 24×8×14 in
Recommended amplifier power: 40–200 W
Weight: 14.9 kg (32.8 lb)
MSRP: $699 each (MSRP, September 2026)

Every value comes from the sources under References, last retrieved September 15, 2026. To check it against the rest of your system, use the compatibility checker.

Questions about the Reserve R400

What receiver do I need for the Reserve R400?: One rated for 8 Ω speakers. In our catalogue, Denon AVR-S570BT, Emotiva BasX A-700 and Yamaha RX500A are rated to drive it.
Is the Reserve R400 4 ohm or 8 ohm?: The Polk Reserve R400 has a nominal impedance of 8 Ω. Use a receiver or amplifier rated down to 8 Ω or lower.
How much power does the Reserve R400 need?: Polk recommends an amplifier of 40–200 W. Its sensitivity is 89 dB (2.83 V, 1 m). How much of that you use depends on how far you sit and how loud you listen, which the 3D editor works out for your room.
How low does the Reserve R400 go?: The Polk Reserve R400 is rated down to 48 Hz. Below that, a subwoofer takes over; where the bass actually lands depends on your room's modes.
How big is the Reserve R400?: The Polk Reserve R400 measures 615 × 196.6 × 350 mm (24.2 × 7.7 × 13.8 in, width × height × depth) and weighs 14.9 kg (32.8 lb).

References

Brand names are trademarks of their owners. Not affiliated with or endorsed by any manufacturer. 3D models are our approximations. Prices are manufacturer list prices (MSRP) as of the month shown. How we earn from buy links: affiliate disclosure.