Jeff’s Burson Soloist 3X GT with Shahinian Obelisks and Audeze LCD-4z

Published on

Post Info

It’s only been half a day, and it is impressive -notably the airy and delicate treble – I will give an updated review in a week once I let it burn in – or after my initial 100 hours, test different IC cables – compare it against my Tube headphone amp (which was a little less expensive but has a $1000 of NOS tube upgrades – and currently beats the Burson—but let’s recheck this in a week or two, as the bass is getting a bit deeper and articulate as I play the Soloist). I love the volume control – it is fantastic!! And the settings controls are intuitive and easy to operate – thank you, Burson. So far only been testing with the Audeze LCD-4z (custom build), and there has been no fatigue – and I have worn them for 6 hours. Later this week, I will change over to the Audeze LCD-5. And then, I will test it as a preamp to my speaker amps. But the initial impression is that this is a keeper (absolutely). If I can update my review later, I will. I love talking about equipment comparisons. These aren’t very pretty photos from my iPhone – the Burson doesn’t have a home on my desktop yet, so I can get to the cables quickly and experiment, and so far, sits in front of a Shiit Audio Freya + preamp (which I may replace with the Soloist 3xGT if the speaker SQ improves with it as pre-amp). But it is progressively sounding better as day one grows longer, and I am impressed. Did I mention how much I love the volume knob? ;) *The LCD-5 is going to be a treat). And Burson has excellent support (Hi Alex! Cheers, Melbourne).

The System

Listening with

Shahinian Obelisks
Audeze LCD-4z · Headphones: open-back, planar magnetic, circumaural
  • Impedance: 15 Ω
  • Sensitivity: 98 dB/1mW (at Drum Reference Point) ≈ 116.2 dB/V (calc.)
  • Frequency response: 5 Hz – 50 kHz
  • Plugs / cables supplied: 2.5 m braided 4-pin XLR balanced cable; 4-pin XLR to 6.35 mm adapter; 6.35 to 3.5 mm adapter
  • Other: recommended power >250 mW (min >100 mW);

Matching notes: At 15 Ω and 98 dB/mW, the LCD-4z is a low-impedance load: about 0.49 V (16 mW, 33 mA) for 110 dB SPL (calc.). Burson does not publish a 15 Ω rating for the Soloist 3X GT; its nearest published rating is 10 W XLR / 5 W SE into 16 Ω. The Soloist 3X GT’s 0.5 Ω headphone output impedance is 1/30 of the load. [1] [2] [3]

Audeze LCD-5 · Headphones: open-back, planar magnetic, circumaural
  • Impedance: 14 Ω
  • Sensitivity: 90 dB/1mW (at Drum Reference Point) ≈ 108.5 dB/V (calc.)
  • Frequency response: 5 Hz – 50 kHz
  • Plugs / cables supplied: 2.5 m braided 4-pin XLR balanced cable; 4-pin XLR to 6.35 mm adapter; 6.35 to 3.5 mm adapter
  • Other: recommended power >500 mW (min >100 mW; max 5 W RMS);

Matching notes: At 14 Ω and 90 dB/mW, the LCD-5 is a low-impedance load, and a fairly demanding one: about 1.2 V (100 mW, 85 mA) for 110 dB SPL (calc.). Burson does not publish a 14 Ω rating for the Soloist 3X GT; its nearest published rating is 10 W XLR / 5 W SE into 16 Ω. The Soloist 3X GT’s 0.5 Ω headphone output impedance is 1/28 of the load. [4] [2] [3]

Burson

Burson Soloist 3X GT · Headphone amplifier / preamp (Class-A) · discontinued
  • Output power (XLR / SE): 16 Ω 10 W / 5 W · 32 Ω 8 W / 4 W · 100 Ω 3.8 W / 1.9 W · 300 Ω 1.3 W / 0.65 W · 600 Ω 0.64 W / 0.32 W
  • Output impedance: 0.5 Ω (headphone); 25 Ω (pre out)
  • Gain: High / Medium / Low; dB not published
  • Inputs: 2x XLR; 2x RCA; mic bypass
  • Input impedance: 35 kΩ
  • Input sensitivity: line level
  • Outputs: XLR + RCA pre out; RCA subwoofer out; 4-pin XLR + SE headphone
  • Other: Model R-120X (“GT3”); THD <0.0015%; FR ±1 dB 0-48 kHz

[2] [3]

Also in the system

Schiit Yggdrasil · DAC: multibit DAC (original 2015 version, AD5791 x4, SHARC DSP closed-form filter) · discontinued
  • Frequency response: 20 Hz – 20 kHz (±0.1 dB); 0.5 Hz – 200 kHz (-1 dB)
  • Output impedance: 75 Ω
  • Output voltage: RCA 2.0 V · XLR 4.0 V
  • Inputs: AES/EBU; coaxial; optical; BNC; USB (all up to 24/192)
  • Outputs: 1x XLR pair; 2x RCA pairs
  • DAC / chipset: 4x Analog Devices AD5791BRUZ (balanced); ADI SHARC DSP; AKM AK4113 S/PDIF; C-Media CM6632 USB
  • Other: THD 0.006%; IMD 0.007% CCIF; S/N >117 dB ref 2 V; 35 W; 11.4 kg

Matching notes: Burson lists the Soloist 3X GT’s analogue inputs as line level (35 kΩ input impedance). The Schiit Yggdrasil is rated at 2.0 V (RCA) / 4.0 V (XLR) output. [5] [6] [2] [3]

Woo Audio WA22
Audio Art Cable
Schiit Aegir
SE Bal
Speaker Amps: Bedini 25/25 dual Mono Class A

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.

  1. Audeze LCD-4z: audeze.com
  2. Burson Soloist 3X GT product page
  3. Burson Soloist 3XGT User Manual V2.0 (Burson downloads)
  4. Audeze LCD-5: audeze.com
  5. Schiit Yggdrasil: stereophile.com (magazine reproduction of manufacturer specs)
  6. Schiit Yggdrasil: PDF (schiit.com) (magazine reproduction of manufacturer specs)