Power needed
30–30 W
per channel, into 4 ohms
To hit 95 dB peaks at 3 m from a pair of Buchardt S400 MK3, you need at least 30 W a channel. More than 30 W is wasted here - that is all Buchardt 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
- -82.0 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 87 dB, used as 82.0 dB per watt.
Marantz PM8006 with the Buchardt S400 MK3
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (70 W to 100 W).
Full Marantz PM8006 specs
·
Clear this amp
191 integrated amplifiers suit the Buchardt S400 MK3
Also show the 60 we do not recommend
1
Workable with care
3 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power nearly doubles into 4 ohms (30 W to 60 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
2
Workable with care
Just barely enough (0 dB of headroom). Fine at normal volume, no reserve for peaks.
Rated down to 4 ohms, comfortable with a 4 ohm speaker.
Barely gains into 4 ohms (25 W to 33 W) - a modest power supply.
Balanced against the price of the speakers.
3
Workable with care
4 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (50 W to 75 W).
Balanced against the price of the speakers.
4
Workable with care
Just barely enough (1 dB of headroom). Fine at normal volume, no reserve for peaks.
Has a 4 ohm tap, which is exactly what this 4 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so sensitivity decides it. At 82.0 dB this speaker needs most of the 35 W available - it will work, with little in reserve.
Balanced against the price of the speakers.
5
Workable with care
4 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (50 W to 75 W).
Balanced against the price of the speakers.
6
Workable with care
4 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (50 W to 80 W).
Balanced against the price of the speakers.
7
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power nearly doubles into 4 ohms (50 W to 100 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
8
Workable with care
2 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power nearly doubles into 4 ohms (25 W to 50 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
9
Workable with care
2 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Rated at the same 50 W into 4 ohms as into 8 - the power supply runs out before the load does.
Balanced against the price of the speakers.
10
Workable with care
2 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Rated at the same 50 W into 4 ohms as into 8 - the power supply runs out before the load does.
Balanced against the price of the speakers.
11
Workable with care
4 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (50 W to 72 W).
Sensible value pick against these speakers.
12
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power nearly doubles into 4 ohms (55 W to 105 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
13
Workable with care
3 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 W the maker rates the speaker for, so keep an eye on the volume knob.
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 that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
14
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (70 W to 100 W).
Balanced against the price of the speakers.
15
Workable with care
3 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (45 W to 65 W).
Sensible value pick against these speakers.
16
Workable with care
2 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Rated at the same 50 W into 4 ohms as into 8 - the power supply runs out before the load does.
Sensible value pick against these speakers.
17
Workable with care
4 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (50 W to 75 W).
Sensible value pick against these speakers.
18
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (60 W to 100 W).
Balanced against the price of the speakers.
19
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power rises usefully into 4 ohms (70 W to 100 W).
Balanced against the price of the speakers.
20
Workable with care
7 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
Power nearly doubles into 4 ohms (70 W to 140 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
Showing the best 20 of 191. Narrow it with the price range below, or a different budget split.
46 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
Workable with care
Just barely enough (1 dB of headroom). Fine at normal volume, no reserve for peaks.
Has a 4 ohm tap, which is exactly what this 4 ohm speaker wants. Taps: 4 / 8 / 16 ohm.
A valve amplifier makes the same power on each tap, so sensitivity decides it. At 82.0 dB this speaker needs most of the 40 W available - it will work, with little in reserve.
Balanced against the price of the speakers.
2
Workable with care
Just barely enough (2 dB of headroom). Fine at normal volume, no reserve for peaks.
Has a 4 ohm tap, which is exactly what this 4 ohm speaker wants. Taps: 4 / 8 / 16 ohm.
A valve amplifier makes the same power on each tap, so sensitivity decides it. At 82.0 dB this speaker needs most of the 44 W available - it will work, with little in reserve.
Costs more than the speakers - worth it only if you plan to upgrade them later.
3
Workable with care
4 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
No 4 ohm power rating on file. On a 4 ohm speaker that is the figure that matters, so this one is unproven on the load.
Sensible value pick against these speakers.
4
Workable with care
4 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 W the maker rates the speaker for, so keep an eye on the volume knob.
Has a 4 ohm tap, which is exactly what this 4 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 82.0 dB this speaker is efficient enough that 70 W is comfortable.
Costs more than the speakers - worth it only if you plan to upgrade them later.
5
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 W the maker rates the speaker for, so keep an eye on the volume knob.
Has a 4 ohm tap, which is exactly what this 4 ohm speaker wants. Taps: 4 / 8 ohm.
A valve amplifier makes the same power on each tap, so what matters is sensitivity - and at 82.0 dB this speaker is efficient enough that 100 W is comfortable.
Costs more than the speakers - worth it only if you plan to upgrade them later.
6
Workable with care
5 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
No 4 ohm power rating on file. On a 4 ohm speaker that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the speakers.
7
Workable with care
Just barely enough (2 dB of headroom). Fine at normal volume, no reserve for peaks.
Has a 4 ohm tap, which is exactly what this 4 ohm speaker wants. Taps: 4 / 8 / 16 ohm.
A valve amplifier makes the same power on each tap, so sensitivity decides it. At 82.0 dB this speaker needs most of the 44 W available - it will work, with little in reserve.
Costs more than the speakers - worth it only if you plan to upgrade them later.
8
Workable with care
6 dB of headroom over what this speaker needs - peaks stay clean. Well above the 30 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.
No 4 ohm power rating on file. On a 4 ohm speaker that is the figure that matters, so this one is unproven on the load.
Balanced against the price of the 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 Buchardt S400 MK3 specs.
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