Power needed
15–200 W
per channel, into 8 ohms
To hit 95 dB peaks at 3 m from a pair of Polk R500, you need at least 15 W a channel. More than 200 W is wasted here — that is all Polk Audio rates the speaker to take.
Show the working
- 95 dB target at the seat
- +4.8 dB for 3.0 m of distance
- -3 dB for a stereo pair
- -85.0 dB effective sensitivity
- 2 dB allowed for optimistic published sensitivity
- Published sensitivity 87 dB, used as 85.0 dB per watt.
Marantz Stereo 70s with the Polk R500
Excellent match
7 dB of headroom - enough, but at the modest end for this speaker, which takes up to 200 W.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (75 W to 150 W) - a stiff supply that copes with hard loads.
Full Marantz Stereo 70s specs
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Clear this amp
178 integrated amplifiers suit the Polk R500
Also show the 1 we do not recommend
1
Excellent match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (125 W to 250 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
2
Excellent match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (125 W to 250 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
3
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (150 W to 250 W).
Balanced against the price of the speakers.
4
Excellent match
8 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (100 W to 200 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
5
Excellent match
8 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (100 W to 200 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
6
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (150 W to 260 W).
Balanced against the price of the speakers.
7
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (110 W to 180 W).
Balanced against the price of the speakers.
8
Excellent match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (150 W to 300 W) - a stiff supply that copes with hard loads.
Costs more than the speakers - worth it only if you plan to upgrade them later.
9
Good match
13 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (300 W to 450 W).
Balanced against the price of the speakers.
10
Excellent match
13 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (300 W to 580 W) - a stiff supply that copes with hard loads.
Costs more than the speakers - worth it only if you plan to upgrade them later.
11
Good match
8 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (100 W to 165 W).
Balanced against the price of the speakers.
12
Excellent match
7 dB of headroom - enough, but at the modest end for this speaker, which takes up to 200 W.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (75 W to 150 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
13
Excellent match
7 dB of headroom - enough, but at the modest end for this speaker, which takes up to 200 W.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (75 W to 150 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
14
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Rated at the same 150 W into 4 ohms as into 8 - the power supply runs out before the load does.
Balanced against the price of the speakers.
15
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Rated at the same 125 W into 4 ohms as into 8 - the power supply runs out before the load does.
Balanced against the price of the speakers.
16
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Rated at the same 130 W into 4 ohms as into 8 - the power supply runs out before the load does.
Balanced against the price of the speakers.
17
Excellent match
7 dB of headroom - enough, but at the modest end for this speaker, which takes up to 200 W.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power nearly doubles into 4 ohms (80 W to 150 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
18
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (120 W to 200 W).
Costs more than the speakers - worth it only if you plan to upgrade them later.
19
Good match
7 dB of headroom - enough, but at the modest end for this speaker, which takes up to 200 W.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (80 W to 120 W).
Balanced against the price of the speakers.
20
Good match
7 dB of headroom - enough, but at the modest end for this speaker, which takes up to 200 W.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
Power rises usefully into 4 ohms (80 W to 120 W).
Balanced against the price of the speakers.
Showing the best 20 of 178. Narrow it with the price range below, or a different budget split.
18 power amplifiers that would also drive them
Listed separately because they are not a complete system: a power amplifier has no volume control and no inputs to speak of, so you need a preamplifier or a streaming preamp as well. Worth it if you already own one, or if you want to buy the two halves separately.
1
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
2
Good match
8 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
3
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
Costs more than the speakers - worth it only if you plan to upgrade them later.
4
Good match
11 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
No current price on file for this amplifier.
5
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
Costs more than the speakers - worth it only if you plan to upgrade them later.
6
Good match
7 dB of headroom - enough, but at the modest end for this speaker, which takes up to 200 W.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
7
Good match
12 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 2 ohms - stable into anything this speaker will throw at it.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
Costs more than the speakers - worth it only if you plan to upgrade them later.
8
Good match
11 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with an 8 ohm speaker that dips to 3.9.
No 4 ohm power rating on file. On a 8 ohm speaker dipping to 3.9 that is the figure that matters, so this one is unproven on the load.
Costs more than the speakers - worth it only if you plan to upgrade them later.
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Sensitivity and impedance figures are the manufacturer's own. We read sensitivity as dB at 2.83 V/1 m and take 2 dB off it, because published figures run high. Treat the result as a well-founded starting point, not a measurement. Full Polk R500 specs.