Mario’s Burson Funk with Focal Clear, Grado Hemp, E-MU Teak and beyerdynamic T1

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Sales Burson
November 19, 2021

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Audio-Technica ATH-W5000, beyerdynamic T1, Bottlehead Crack, Burson Funk, E-MU Teak, Focal Clear, Grado Hemp, Pro-ject pre box s2 dac, Rupert Neve Designs RNHP

Fast and straightforward, amazing sound and product desing

The System

Listening with

Focal Clear · Headphones: open-back, dynamic (40 mm Al/Mg M-dome), circumaural · discontinued

Impedance: 55 Ω
Sensitivity: 104 dB SPL / 1 mW @ 1 kHz ≈ 116.6 dB/V (calc.)
Frequency response: 5 Hz – 28 kHz
Plugs / cables supplied: 4-pin XLR; 6.35 mm; 3.5 mm cables supplied

Matching notes: At 55 Ω and 104 dB/mW, the Focal Clear is a low-impedance load, and an efficient one: about 0.47 V (4 mW, 8.5 mA) for 110 dB SPL (calc.). Burson does not publish a 55 Ω rating for the Funk. Its 32 Ω and 100 Ω ratings (2.5 W SE; 0.6 W SE) fall either side of it. The Funk’s under 2 Ω headphone output impedance is less than 1/28 of the load. ^{[1] [2] [3] [4] [5] [6]}

Grado Hemp · Headphones: open-back (open air), dynamic, on-ear

Impedance: 38 Ω
Sensitivity: not published
Frequency response: 13 Hz – 28 kHz
Plugs / cables supplied: standard plug with braided cable
Other: driver matching 0.05 dB

^{[7] [8]}

E-MU Teak · Headphones: closed-back, dynamic (50 mm neodymium, bio-cellulose diaphragm), circumaural · discontinued

Impedance: 25 Ω
Sensitivity: 106 dB (reference not stated)
Frequency response: 5 Hz – 45 kHz
Plugs / cables supplied: fixed or detachable (2.5 mm cup sockets) 1.5 m cable, 3.5 mm plug + 6.3 mm adapter
Other: max input 1,800 mW; 370 g without cable

^{[9] [10]}

beyerdynamic T1

Audio-Technica ATH-W5000 · Headphones: closed-back, dynamic, circumaural

Impedance: 40 Ω
Sensitivity: 102 dB/mW ≈ 116.0 dB/V (calc.)
Frequency response: 5 Hz – 45 kHz
Plugs / cables supplied: 3.0 m cable; 6.3 mm plug
Other: 53 mm driver; max input 2,000 mW

Matching notes: At 40 Ω and 102 dB/mW, the ATH-W5000 is a low-impedance load, and an efficient one: about 0.5 V (6.3 mW, 13 mA) for 110 dB SPL (calc.). Burson does not publish a 40 Ω rating for the Funk. Its 32 Ω and 100 Ω ratings (2.5 W SE; 0.6 W SE) fall either side of it. The Funk’s under 2 Ω headphone output impedance is less than 1/20 of the load. ^{[11] [4] [5] [6]}

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

^{[4] [5] [6]}

Also in the system

Bottlehead Crack · Headphone amp: OTL tube headphone amp kit (6080 + 12AU7)

Output impedance: 120 Ω
Gain: ~15 dB into 300 Ω
Inputs: 1x RCA
Input impedance: 100 kΩ
Outputs: 6.35 mm headphone
Other: output ~10 V into 300 Ω; best with high-impedance headphones

^[12]

Pro-ject pre box s2 dac

Rupert Neve Designs RNHP · Headphone amp: precision headphone amp (pro-audio, 3 calibrated inputs)

Frequency response: 10 Hz – 120 kHz (±0.2 dB)
Output power (headphone): 16 Ω 0.23 W · 44 Ω 0.3 W · 150 Ω 0.175 W
Output impedance: 0.08 Ω (1 kHz, 16-150 Ω load)
Inputs: XLR/TRS combo (+4 dBu); RCA (-10 dBV); 3.5 mm
Outputs: 6.35 mm headphone
Other: noise -101.9 dBV (XLR input, 44 Ω); max input +22.8 dBu (XLR); 24 V DC 0.25 A; 0.9 kg

^[13]

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.