Power needed
0.9–60 W
per channel, into 8 ohms
To hit 95 dB peaks at 3 m from a pair of Klipsch Forte IV, you need at least 0.9 W a channel. Anything from about 1.9 W to 60 W a channel is comfortable; past that, more watts stop buying you anything.
Power is not your constraint. The
Klipsch Forte IV is efficient enough that essentially any
amplifier we list will drive it at this level. Choose on inputs, streaming, phono
stage and price instead — and if you like valve amplifiers, this is a speaker
that suits them.
Show the working
- 95 dB target at the seat
- +4.8 dB for 3.0 m of distance
- -3 dB for a stereo pair
- -97.0 dB effective sensitivity
- 2 dB allowed for optimistic published sensitivity
- Published sensitivity 99 dB, used as 97.0 dB per watt.
223 integrated amplifiers suit the Klipsch Forte IV
Also show the 1 we do not recommend
1
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
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.
2
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
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.
3
Excellent match
20 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 100 W is comfortable.
Balanced against the price of the speakers.
4
Excellent match
17 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 44 W is comfortable.
Balanced against the price of the speakers.
5
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power nearly doubles into 4 ohms (70 W to 140 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
6
Excellent match
20 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
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.
7
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 70 W is comfortable.
Balanced against the price of the speakers.
8
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power nearly doubles into 4 ohms (75 W to 150 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
9
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power nearly doubles into 4 ohms (80 W to 150 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
10
Excellent match
16 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 40 W is comfortable.
Balanced against the price of the speakers.
11
Excellent match
16 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 42 W is comfortable.
Balanced against the price of the speakers.
12
Excellent match
17 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power nearly doubles into 4 ohms (50 W to 100 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
13
Good match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power rises usefully into 4 ohms (80 W to 130 W).
Balanced against the price of the speakers.
14
Good match
20 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power rises usefully into 4 ohms (90 W to 150 W).
Balanced against the price of the speakers.
15
Good match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power rises usefully into 4 ohms (75 W to 110 W).
Balanced against the price of the speakers.
16
Excellent match
20 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
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.
17
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power nearly doubles into 4 ohms (70 W to 140 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
18
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power nearly doubles into 4 ohms (70 W to 140 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
19
Good match
20 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power rises usefully into 4 ohms (90 W to 150 W).
Balanced against the price of the speakers.
20
Good match
20 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power rises usefully into 4 ohms (100 W to 160 W).
Balanced against the price of the speakers.
Showing the best 20 of 223. Narrow it with the price range below, or a different budget split.
57 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
Excellent match
20 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 100 W is comfortable.
Balanced against the price of the speakers.
2
Excellent match
17 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 / 16 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 44 W is comfortable.
Balanced against the price of the speakers.
3
Excellent match
17 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 / 16 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 44 W is comfortable.
Balanced against the price of the speakers.
4
Excellent match
19 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 / 16 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 70 W is comfortable.
Balanced against the price of the speakers.
5
Excellent match
21 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
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.
6
Excellent match
16 dB of headroom, far more than needed. No harm in it.
Has a 8 ohm tap, which is exactly what this 8 ohm speaker wants. Taps: 4 / 8 / 16 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 97.0 dB this speaker is efficient enough that 40 W is comfortable.
Balanced against the price of the speakers.
7
Excellent match
20 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 (100 W to 190 W) - a stiff supply that copes with hard loads.
Costs more than the speakers - worth it only if you plan to upgrade them later.
8
Good match
20 dB of headroom, far more than needed. No harm in it.
Rated down to 4 ohms, comfortable with an 8 ohm speaker.
Power rises usefully into 4 ohms (100 W to 150 W).
Balanced against the price of the speakers.
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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 Klipsch Forte IV specs.