Power needed
19–300 W
per channel, into 8 ohms
To hit 95 dB peaks at 3 m from a pair of Spendor AC2, you need at least 19 W a channel. Anything from about 38 W to 300 W a channel is comfortable; past that, more watts stop buying you anything.
Show the working
- 95 dB target at the seat
- +4.8 dB for 3.0 m of distance
- -3 dB for a stereo pair
- -84.0 dB effective sensitivity
- 2 dB allowed for optimistic published sensitivity
- Published sensitivity 86 dB, used as 84.0 dB per watt.
Rotel RB-1552 MkII with the Spendor AC2
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 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
A power amplifier: you will need a preamplifier, or a streamer with a volume control, as well.
Full Rotel RB-1552 MkII specs
·
Clear this amp
178 integrated amplifiers suit the Spendor AC2
Also show the 1 we do not recommend
1
Excellent match
12 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 6.6.
Power nearly doubles into 4 ohms (300 W to 580 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 6.6.
Power nearly doubles into 4 ohms (150 W to 300 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
3
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 6.6.
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.
4
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 6.6.
Power rises usefully into 4 ohms (150 W to 260 W).
Sensible value pick against these speakers.
5
Good match
12 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 6.6.
Power rises usefully into 4 ohms (300 W to 450 W).
Sensible value pick against these 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 6.6.
Power rises usefully into 4 ohms (200 W to 350 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 6.6.
Power rises usefully into 4 ohms (160 W to 240 W).
Balanced against the price of the speakers.
8
Excellent match
12 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 6.6.
Power nearly doubles into 4 ohms (300 W to 550 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
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 6.6.
Power rises usefully into 4 ohms (120 W to 200 W).
Balanced against the price of the speakers.
10
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 6.6.
Power rises usefully into 4 ohms (140 W to 220 W).
Balanced against the price of the speakers.
11
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 6.6.
Power rises usefully into 4 ohms (150 W to 250 W).
Balanced against the price of the speakers.
12
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 6.6.
Rated at the same 180 W into 4 ohms as into 8 - the power supply runs out before the load does.
Balanced against the price of the speakers.
13
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 6.6.
Power rises usefully into 4 ohms (150 W to 250 W).
Balanced against the price of the speakers.
14
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 6.6.
Power rises usefully into 4 ohms (150 W to 250 W).
Sensible value pick against these speakers.
15
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 6.6.
Power rises usefully into 4 ohms (130 W to 190 W).
Balanced against the price of the speakers.
16
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 6.6.
Power rises usefully into 4 ohms (130 W to 200 W).
Balanced against the price of the speakers.
17
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 (200 W to 400 W) - a stiff supply that copes with hard loads.
Costs more than the speakers - worth it only if you plan to upgrade them later.
18
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 6.6.
Rated at the same 180 W into 4 ohms as into 8 - the power supply runs out before the load does.
Balanced against the price of the speakers.
19
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 6.6.
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.
20
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 6.6.
Power rises usefully into 4 ohms (130 W to 200 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
11 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, so we cannot judge current delivery.
Balanced against the price of the speakers.
2
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 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
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 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
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 an 8 ohm speaker that dips to 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
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 an 8 ohm speaker that dips to 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
Balanced against the price of the speakers.
6
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 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
Balanced against the price of the speakers.
7
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 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
Balanced against the price of the speakers.
8
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 6.6.
No 4 ohm power rating on file, so we cannot judge current delivery.
No current price on file for this amplifier.
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 Spendor AC2 specs.