Aldous’s Burson Funk with Monitor Audio Silver 50 and Sennheiser HD 800

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Sales Burson
December 22, 2021

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Audeze LCD-X, Burson Funk, Matrix Audio mini-i Pro 3, Monitor Audio Silver 50, Sennheiser HD 600, Sennheiser HD 800

The Burson Funk is very neat and has a nice form factor for a class A speaker amp. It fits my rather modest desk space. Plus the headphone out is clean and has plenty of power. Will try it soon with the v6 opamps for that extra detail I heard before with my Burson fun.

The System

Listening with

Monitor Audio Silver 50

Sennheiser HD 800 · Headphones: open-back, dynamic, circumaural (ring radiator) · discontinued

Impedance: 300 Ω
Sensitivity: 102 dB SPL @ 1 kHz, 1 V (as published) ≈ 96.8 dB/mW (calc.)
Frequency response: 14 Hz – 44.1 kHz (-3 dB); 6 Hz – 51 kHz (-10 dB)
Plugs / cables supplied: 6.3 mm stereo jack plug; 3 m cable
Other: THD <=0.02% (1 kHz, 1 Vrms); max input 500 mW

Matching notes: At 300 Ω and 102 dB/V, the HD 800 is a high-impedance load that needs voltage more than current: about 2.5 V (21 mW, 8.4 mA) for 110 dB SPL (calc.). Burson rates the Funk at 0.15 W (SE) into 300 Ω, which is about 6.7 V RMS (calc.), roughly 9 dB more than that. The Funk’s under 2 Ω headphone output impedance is less than 1/150 of the load. ^{[1] [2] [3] [4]}

Audeze LCD-X · Headphones: open-back, planar magnetic, circumaural

Impedance: 20 Ω
Sensitivity: 103 dB/1mW (at Drum Reference Point) ≈ 120.0 dB/V (calc.)
Frequency response: 10 Hz – 50 kHz
Plugs / cables supplied: braided 4-pin XLR combo cable with 6.35 mm single-ended adapter
Other: recommended power >250 mW (min >100 mW; max 5 W RMS); 106 mm driver; max SPL >130 dB

Matching notes: At 20 Ω and 103 dB/mW, the Audeze LCD-X is a low-impedance load, and an efficient one: about 0.32 V (5 mW, 16 mA) for 110 dB SPL (calc.). Burson does not publish a 20 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 1/10 of the load. ^{[5] [2] [3] [4]}

Sennheiser HD 600 · Headphones: open-back, dynamic, circumaural

Impedance: 300 Ω
Sensitivity: 97 dB SPL @ 1 kHz, 1 V (as published) ≈ 91.8 dB/mW (calc.)
Frequency response: 12 Hz – 40.5 kHz
Plugs / cables supplied: 3.5 mm stereo jack plug with 6.3 mm adapter; 3 m cable
Other: THD <0.1% (1 kHz, 1 V)

Matching notes: At 300 Ω and 97 dB/V, the HD 600 is a high-impedance load that needs voltage more than current: about 4.5 V (67 mW, 15 mA) for 110 dB SPL (calc.). Burson rates the Funk at 0.15 W (SE) into 300 Ω, which is about 6.7 V RMS (calc.), roughly 4 dB more than that. The Funk’s under 2 Ω headphone output impedance is less than 1/150 of the load. ^{[6] [7] [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

Matrix Audio mini-i Pro 3

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.