What amplifier does the Monitor Audio Platinum 300 3G need?

Pick a speaker and tell us how loud you listen and how big the room is. We work out the power it actually needs, check which amplifiers can safely drive its impedance, and rank 293 amplifiers against it.

Your system

Four questions. Nothing is hidden on price.

Passive speakers only - a powered speaker already has its amplifier inside.
Changes the order only. Nothing is hidden for costing too little or too much.
Monitor Audio Platinum 300 3G
Monitor Audio Platinum 300 3G
Floor-standing
88 dB · 4 ohm
dips to 4 ohm
$17,900 a pair
Full specs →
Power needed
24–375 W
per channel, into 4 ohms

To hit 95 dB peaks at 3 m from a pair of Monitor Audio Platinum 300 3G, you need at least 24 W a channel. Anything from about 47 W to 375 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
  • -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.

Cambridge Audio Edge A with the Monitor Audio Platinum 300 3G

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.
Full Cambridge Audio Edge A specs · Clear this amp
 
$90 $25,000

188 integrated amplifiers suit the Monitor Audio Platinum 300 3G

Also show the 58 we do not recommend
1
Technics SU-R1000
Technics SU-R1000
Integrated Amplifier · Class D · 150 W into 8 ohms · $11,999
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.
Balanced against the price of the speakers.
2
MOON 641
MOON 641
Integrated Amplifier · Class A/B · 125 W into 8 ohms · $11,000
Excellent 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 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.
3
Mark Levinson No.5805
Mark Levinson No.5805
Integrated Amplifier · Class A/B · 125 W into 8 ohms · $10,500
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.
Sensible value pick against these speakers.
4
Luxman L-507Z
Luxman L-507Z
Integrated Amplifier · Class A/B · 110 W into 8 ohms · $10,495
Excellent 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 nearly doubles into 4 ohms (110 W to 220 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
5
Devialet Astra
Devialet Astra
Integrated Amplifier · ADH (Analog Digital Hybrid) · 150 W into 8 ohms · $20,000
Excellent 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.
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.
6
Marantz Model 10
Marantz Model 10
Integrated Amplifier · Class D · 250 W into 8 ohms · $15,000
Excellent match
13 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 (250 W to 500 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
7
Mark Levinson No.5802
Mark Levinson No.5802
Integrated Amplifier · Class A/B · 125 W into 8 ohms · $8,500
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.
Sensible value pick against these speakers.
8
Mark Levinson No.585.5
Mark Levinson No.585.5
Integrated Amplifier · Class A/B · 200 W into 8 ohms · $16,575
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 (200 W to 300 W).
Balanced against the price of the speakers.
9
Marantz PM-10
Marantz PM-10
Integrated Amplifier · Class D · 200 W into 8 ohms · $8,999
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 400 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
10
Naim Nova PE
Naim Nova PE
Integrated Amplifier · Class D · 150 W into 8 ohms · $9,999
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.
11
NAD Masters Series M33 V2
NAD Masters Series M33 V2
Integrated Amplifier · Class D · 200 W into 8 ohms · $7,399
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.
Sensible value pick against these speakers.
12
Cambridge Audio Edge A
Cambridge Audio Edge A
Integrated Amplifier · Class XA · 100 W into 8 ohms · $6,499
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.
13
Advance Paris NOVA A-i190
Advance Paris NOVA A-i190
Integrated Amplifier · Class AB-T · 185 W into 8 ohms · $7,999
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 (185 W to 275 W).
Sensible value pick against these speakers.
14
Hegel H600
Hegel H600
Integrated Amplifier · Class A/B · 305 W into 8 ohms · $13,800
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. 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.
15
Michi X3 Series 2
Michi X3 Series 2
Integrated Amplifier · Class A/B · 235 W into 8 ohms · $7,499
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 (235 W to 350 W).
Sensible value pick against these speakers.
16
NAD Masters Series M33
NAD Masters Series M33
Integrated Amplifier · Class D · 200 W into 8 ohms · $5,999
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.
Sensible value pick against these speakers.
17
McIntosh MSA5500
McIntosh MSA5500
Integrated Amplifier · Class A/B · 100 W into 8 ohms · $8,000
Good 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 rises usefully into 4 ohms (100 W to 160 W).
Sensible value pick against these speakers.
18
Michi X5 Series 2
Michi X5 Series 2
Integrated Amplifier · Class A/B · 390 W into 8 ohms · $9,499
Good match
14 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 rises usefully into 4 ohms (390 W to 600 W).
Sensible value pick against these speakers.
19
Advance Paris NOVA A-i130
Advance Paris NOVA A-i130
Integrated Amplifier · Class AB-T · 125 W into 8 ohms · $6,499
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 (125 W to 185 W).
Sensible value pick against these speakers.
20
Anthem STR
Anthem STR
Integrated Amplifier · Class A/B · 200 W into 8 ohms · $5,000
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.
Sensible value pick against these speakers.

Showing the best 20 of 188. Narrow it with the price range below, or a different budget split.

47 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
Accuphase P-4600
Accuphase P-4600
Power Amplifier · Class A/B · 150 W into 8 ohms · $13,975
Excellent 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.
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.
2
Audio Research S-200
Audio Research S-200
Power Amplifier · Class A/B · 200 W into 8 ohms · $12,950
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 400 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
3
Naim NAP 250
Naim NAP 250
Power Amplifier · Class A/B · 100 W into 8 ohms · $8,999
Excellent match
9 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 (100 W to 190 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
4
Naim NAP 350
Naim NAP 350
Power Amplifier · Class A/B · 175 W into 8 ohms · $8,499
Excellent 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.
Power nearly doubles into 4 ohms (175 W to 345 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
5
Mark Levinson No.534
Mark Levinson No.534
Power Amplifier · Class A/B · 250 W into 8 ohms · $25,000
Excellent match
13 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 (250 W to 500 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
6
Mark Levinson No.536
Mark Levinson No.536
Power Amplifier · Class A/B · 400 W into 8 ohms · $18,500
Workable with care
15 dB of headroom, far more than needed. No harm in it. Well above the 400 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.
Power nearly doubles into 4 ohms (400 W to 800 W) - a stiff supply that copes with hard loads.
Balanced against the price of the speakers.
7
T+A M 200
T+A M 200
Power Amplifier · Class D · 210 W into 8 ohms · $5,995
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 (210 W to 420 W) - a stiff supply that copes with hard loads.
Sensible value pick against these speakers.
8
MOON 330A
MOON 330A
Power Amplifier · Class A/B · 125 W into 8 ohms · $4,400
Excellent 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 nearly doubles into 4 ohms (125 W to 250 W) - a stiff supply that copes with hard loads.
Well below the speakers - leaves money on the table, but nothing wrong with it.
Were these amplifier recommendations useful?
It helps us tune the matching, and we read every comment.

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 300 3G specs.

More tools

💰
System Budget Planner
Split a total across speakers, amplifier and subwoofer, then fill every slot with real models that work together.
📏️
Will It Fit? Speaker Size Finder
Measure your shelf or alcove and see every speaker that goes in it, with a warning where a rear port needs more room than the box does.
🔌
Speaker Wire Gauge Calculator
How thick your speaker cable needs to be for the run length and impedance, and what you lose if it is too thin.
Speaker Impedance Calculator
Wire two or more speakers in series or parallel and see the load your amplifier actually sees.
📏
Speaker Placement Calculator
A plan view of your room: speaker spacing, wall distances, where the bass cancels and where the first reflection lands.
🎸
Subwoofer Crossover Calculator
Where to set the crossover between your speakers and a subwoofer, and which reason is driving the answer.
🎧
Speaker Test Tones
Channel check, polarity, bass extension and frequency sweeps, generated in your browser. Nothing to download.
🏠
Room Mode Calculator
The frequencies your room reinforces and cancels, where they pile up, and what to move first.
📣
SPL & Amplifier Power Calculator
How loud a speaker plays for a given power at a given distance - or how many watts you need for a target level.