Devendra’s Burson Funk with KEF LS50 Meta and Meze Liric

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Sales Burson
April 6, 2023

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Burson Funk, KEF LS50 Meta, Meze Liric, Shanling EM7

Amazing small amplifier Easily drive KEF LS50 Meta, Ultra good sound quality. Ultra good headphone sound quality,
Thanks.

The System

Listening with

KEF LS50 Meta · Speakers: bookshelf, two-way bass reflex (Uni-Q)

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]}

Meze Liric · Headphones: closed-back, planar magnetic (Rinaro Isodynamic Hybrid Array MZ4), circumaural · discontinued

Impedance: 30 Ω
Sensitivity: 100 dB SPL / mW @ 1 kHz ≈ 115.2 dB/V (calc.)
Frequency response: 4 Hz – 92 kHz
Plugs / cables supplied: dual 3.5 mm TS cup sockets (current page)

Matching notes: At 30 Ω and 100 dB/mW, the Meze Liric is a low-impedance load, and an efficient one: about 0.55 V (10 mW, 18 mA) for 110 dB SPL (calc.). Burson does not publish a 30 Ω rating for the Funk. Its 16 Ω and 32 Ω ratings (3.5 W SE; 2.5 W SE) fall either side of it. The Funk’s under 2 Ω headphone output impedance is less than 1/15 of the load. ^{[5] [6] [2] [3] [4]}

Burson

Burson Funk · Headphone amplifier / integrated amplifier

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]}

Also in the system

Shanling EM7 · Streamer/dap: desktop Android streamer / DAC / headphone amp (5.8 in touchscreen)

Output power (XLR / SE): 32 Ω 7 W / 2.3 W · 300 Ω 1 W / 0.27 W
Output impedance: 1.2 Ω (SE); 2.4 Ω (balanced)
Inputs: USB-B; coaxial; optical; 2x USB-A (drives); microSD; Wi-Fi; Bluetooth 5.0 (LDAC / SBC receive)
Outputs: 4.4 mm + 4-pin XLR balanced headphone; 3.5 mm + 6.35 mm SE; RCA + XLR line out; coaxial, optical, USB digital out
DAC / chipset: ESS ES9038PRO
Other: PCM 768 kHz / 32-bit, DSD512; OPA1611 I/V, OPA2211 LPF; balanced THD+N 0.0003%, DR 125 dB, SNR 125 dB; 3.2 kg

^[7]

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.