Power needed
24–300 W
per channel, into 4 ohms
To hit 95 dB peaks at 3 m from a pair of Monitor Audio Platinum C250 3G, you need at least 24 W a channel. More than 300 W is wasted here — that is all Monitor 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
- -83.0 dB effective sensitivity
- 3.0 dB taken off to convert the 4 ohm 2.83V rating to dB per watt
- 2 dB allowed for optimistic published sensitivity
- Published sensitivity 88 dB, used as 83.0 dB per watt.
Anthem STR Power Amplifier with the Monitor Audio Platinum C250 3G
Good match
12 dB of headroom, far more than needed. No harm in it.
Rated down to 2 ohms - stable into anything this speaker will throw at it.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
A power amplifier: you will need a preamplifier, or a streamer with a volume control, as well.
Full Anthem STR Power Amplifier specs
·
Clear this amp
149 integrated amplifiers suit the Monitor Audio Platinum C250 3G
Also show the 30 we do not recommend
1
Excellent match
12 dB of headroom, far more than needed. No harm in it.
Rated down to 2 ohms - stable into anything this speaker will throw at it.
Power nearly doubles into 4 ohms (200 W to 400 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 a 4 ohm speaker that dips to 4.
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.
3
Excellent match
12 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power nearly doubles into 4 ohms (200 W to 380 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
4
Good match
11 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (180 W to 270 W).
Balanced against the price of the speakers.
5
Good match
11 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (190 W to 280 W).
Balanced against the price of the speakers.
6
Excellent match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power nearly doubles into 4 ohms (100 W to 200 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
7
Excellent match
8 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power nearly doubles into 4 ohms (80 W to 160 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
8
Good match
11 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (180 W to 300 W).
Balanced against the price of the speakers.
9
Excellent match
8 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power nearly doubles into 4 ohms (80 W to 160 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
10
Good match
12 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (210 W to 340 W).
Balanced against the price of the speakers.
11
Good match
12 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (200 W to 350 W).
Balanced against the price of the speakers.
12
Excellent match
12 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power nearly doubles into 4 ohms (200 W to 380 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
13
Excellent match
10 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.
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.
14
Workable with care
14 dB of headroom, far more than needed. No harm in it. Well above the 300 W the maker rates the speaker for, so keep an eye on the volume knob.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power nearly doubles into 4 ohms (300 W to 550 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
15
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (150 W to 250 W).
Sensible value pick against these speakers.
16
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (150 W to 250 W).
Sensible value pick against these speakers.
17
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (160 W to 240 W).
Sensible value pick against these speakers.
18
Excellent match
11 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power nearly doubles into 4 ohms (150 W to 300 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
19
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (130 W to 200 W).
Sensible value pick against these speakers.
20
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
Power rises usefully into 4 ohms (120 W to 200 W).
Sensible value pick against these speakers.
Showing the best 20 of 149. Narrow it with the price range below, or a different budget split.
17 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 a 4 ohm speaker that dips to 4.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
2
Good match
11 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
3
Good match
12 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
4
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
5
Good match
10 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
Sensible value pick against these speakers.
6
Good match
12 dB of headroom, far more than needed. No harm in it.
Rated down to 2 ohms - stable into anything this speaker will throw at it.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
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 a 4 ohm speaker that dips to 4.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
Sensible value pick against these speakers.
8
Good match
9 dB of headroom over what this speaker needs - peaks stay clean.
Rated down to 4 ohms, comfortable with a 4 ohm speaker that dips to 4.
No 4 ohm power rating on file. On a 4 ohm speaker dipping to 4 that is the figure that matters, so this one is unproven on the load.
Sensible value pick against these speakers.
Were these amplifier recommendations useful?
It helps us tune the matching, and we read every comment.
Thanks. Anything you would add?
Optional, and it goes straight to the person who maintains this page.
Thanks — noted.
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 Monitor Audio Platinum C250 3G specs.