Ricky’s Burson Funk with KEF LS50 Meta

• Impedance: 8 Ω (minimum 3.5 Ω)
• Sensitivity: 85 dB (2.83 V / 1 m)
• Frequency response: 79 Hz – 28 kHz (±3 dB); 47 Hz – 45 kHz range
• Recommended amplifier power: 40 – 100 W
• Other: max SPL 106 dB

Matching notes: The LS50 Meta is rated at 85 dB (2.83 V / 1 m) into 8 Ω nominal (3.5 Ω minimum). Burson rates the Funk at 35 W into 8 Ω and 45 W into 4 Ω. At that rating the speaker would reach about 100 dB SPL at 1 m (calc., one speaker, before room gain). KEF recommends 40 – 100 W amplifiers. ^{[1] [2] [3] [4]}

• Output power (headphone): 16 Ω 3.5 W · 32 Ω 2.5 W · 100 Ω 0.6 W · 150 Ω 0.4 W · 300 Ω 0.15 W
• Power: 8 Ω: 35 W · 4 Ω: 45 W
• Output impedance: <2 Ω (headphone)
• Gain: not published
• Inputs: RCA L/R
• Input impedance: 38 kΩ
• Outputs: headphone (SE); speaker terminals
• Other: Model P-300; THD <0.03%; FR ±1 dB 0-35 kHz; speaker S/N 92.5 dB

^{[2] [3] [4]}

Specs from manufacturer data unless a source below says otherwise. “calc.” values are worked out from those figures (V = √(P × R); 110 dB SPL used as a loud reference level). Gear listed without specs is not in our spec library yet.

1. KEF LS50 Meta: us.kef.com
2. Burson Funk product page (funk page)
3. Burson Funk product page (funk page, archived 2021)
4. Burson Funk User Manual V1.5 (Burson downloads)