Burson Funk with Totem Acoustic Rainmaker and Grado SR225e

Published on

Sales Burson
November 25, 2021

Post Info

Feedbacks - Funk
Burson Funk, DIY 300B PowerAmp., DIY 5670 PreAmp, Grado SR225e, Heybrook TT2, Linn Basik Tonearm, Totem Acoustic Rainmaker

For a headphone amp, Funk is good match for my Grado, power enough, with Burson Opamp V6 vivid the sound is sharp and fast, for a power amp Funk is slightly not power enough for some classical music but for general listening is very good. The form factor is good for modern home since not a lot of space

The System

Listening with

Totem Acoustic Rainmaker · Speakers: passive 2-way standmount (1 in chambered aluminium dome, 5.5 in woofer)

Impedance: 4 Ω
Sensitivity: 87.5 dB (1 W / 1 m)
Frequency response: 42 Hz – 20 kHz (±3 dB)
Recommended amplifier power: 30 – 100 W
Other: crossover 2.3 kHz 2nd order; break-in 70-100 h; 356 x 173 x 231 mm

Matching notes: The Totem Acoustic Rainmaker is rated at 87.5 dB (1 W / 1 m) into 4 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 104 dB SPL at 1 m (calc., one speaker, before room gain). Totem Acoustic recommends 30 – 100 W amplifiers. ^{[1] [2] [3] [4] [5]}

Grado SR225e · Headphones: open-back (“open air”), dynamic (e-series driver), supra-aural · discontinued

Impedance: 32 Ω
Sensitivity: 99.8 dB SPL / 1 mW ≈ 114.7 dB/V (calc.)
Frequency response: 20 Hz – 22 kHz
Plugs / cables supplied: fixed cable, 6.3 mm plug (3.5 mm adapter)
Other: driver matching 0.05 dB

Matching notes: At 32 Ω and 99.8 dB/mW, the SR225e is a low-impedance load: about 0.58 V (10 mW, 18 mA) for 110 dB SPL (calc.). Burson rates the Funk at 2.5 W (SE) into 32 Ω, which is about 8.9 V RMS (calc.), roughly 24 dB more than that. The Funk’s under 2 Ω headphone output impedance is less than 1/16 of the load. ^{[6] [3] [4] [5]}

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

^{[3] [4] [5]}

Also in the system

DIY 300B PowerAmp.

DIY 5670 PreAmp

Heybrook TT2

Linn Basik Tonearm

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.