Alex’s Burson Funk with DALI Zensor 3 and beyerdynamic DT 1770 PRO

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Sales Burson
November 9, 2021

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Feedbacks - Funk
beyerdynamic DT 1770 PRO, Burson Funk, Chord Mojo, DALI Zensor 3

Super good so far, still using the Funk with the standard Op Amp paired with my Dali Zensor 3 and the experience is fantastic! Looking forward to swap the standard Op Amp with the pair of Vivid V6 and compare the two ;)

The System

Listening with

DALI Zensor 3 · Speakers: passive 2-way standmount, bass reflex (25 mm soft dome, 1x 7 in wood-fibre woofer) · discontinued

Impedance: 6 Ω
Sensitivity: 88.0 dB (2.83 V / 1 m)
Frequency response: 50 Hz – 26.5 kHz (±3 dB)
Recommended amplifier power: 25 – 125 W
Other: max SPL 108 dB; crossover 2,600 Hz

Matching notes: The Zensor 3 is rated at 88 dB (2.83 V / 1 m) into 6 Ω nominal. Burson rates the Funk at 35 W into 8 Ω and 45 W into 4 Ω. At that rating the speaker would reach about 103 dB SPL at 1 m (calc., one speaker, before room gain). DALI recommends 25 – 125 W amplifiers. ^{[1] [2] [3] [4]}

beyerdynamic DT 1770 PRO · Headphones: closed-back, dynamic (45 mm Tesla), circumaural · discontinued

Impedance: 250 Ω
Sensitivity: 102 dB SPL (1 mW / 500 Hz) ≈ 108.0 dB/V (calc.)
Frequency response: 5 Hz – 40 kHz
Plugs / cables supplied: detachable cable: 3-pin mini-XLR at cup; 6.35 mm stereo jack plug

Matching notes: At 250 Ω and 102 dB/mW, the DT 1770 PRO is a high-impedance load that needs voltage more than current: about 1.3 V (6.3 mW, 5 mA) for 110 dB SPL (calc.). Burson does not publish a 250 Ω rating for the Funk. Its 150 Ω and 300 Ω ratings (0.4 W SE; 0.15 W SE) fall either side of it. The Funk’s under 2 Ω headphone output impedance is less than 1/125 of the load. ^{[5] [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

Chord Mojo · DAC / headphone amp: portable DAC / headphone amp (FPGA, battery) · discontinued

Output power (headphone): 8 Ω 0.72 W · 600 Ω 0.035 W
Output impedance: 0.075 Ω
Output voltage: RCA 3 Vrms (line level mode, 3.5 mm)
Inputs: Micro USB (768 kHz/32-bit, DSD256); 3.5 mm coax (768 kHz); Toslink (96 kHz)
Outputs: 2x 3.5 mm headphone
DAC / chipset: Chord custom FPGA
Other: dynamic range 125 dB; THD @ 3 V 0.00017%; supports 800 Ω headphones; 8 h battery

^[6]

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.