Oriolus BA300S MKII
The Oriolus BA300S MKII brings a warm, analogue tube voice to a genuinely portable balanced rig, with a particularly lush midrange that flatters vocals and acoustic textures. Head-Fi highlights its richer tuning over the original, while 4.4mm balanced connectivity and 350mW-per-channel output make it a focused companion for musical, full-bodied listening.
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Just Okay
Sound Quality
77/100
Build Quality
75/100
Features Usability
82/100
Value for Money
85/100
Pros
Warm, analogue tube character delivers a distinctly musical and full-bodied presentation.
MKII version offers a noticeably lusher midrange than the original BA300S.
Cons
Its strongly warm, tube-coloured tuning will not suit listeners seeking a neutral presentation.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 77/100
Available listening commentary identifies a distinctly warm, analogue tube character and a lusher midrange than the earlier BA300S. The reviews provide little direct evidence on resolution, dynamic authority, background silence, or performance across a wide range of headphones.
Transparency Resolution
75/100
The available comments do not directly discuss detail retrieval, separation, treble openness, or overall transparency. Its presentation may prioritize tube richness over strict neutrality, but the review evidence is too limited to draw a firmer conclusion.
Tonal Balance Musicality
86/100
The BA300S MKII is described as very warm, analogue and tube-like, with a noticeably lusher midrange. That should appeal to listeners seeking body and vocal richness, though the reviewer notes that this coloration will not suit every taste.
Dynamics
75/100
No reviewer comments directly address transient snap, bass control, headroom, or macro- and microdynamic expression. The supplied specifications list 350mW per channel into 32 ohms, but real-world reports of effortless drive are absent.
Noise Floor
75/100
The reviews do not report on hiss, hum, or background silence with sensitive earphones. Its published signal-to-noise figure is promising, but there is no listening evidence showing how quiet it is in everyday use.
Headphone Compatibility
76/100
Oriolus lists an 8-300 ohm supported impedance range and a balanced 4.4mm output, suggesting intended use with a broad range of portable headphones and IEMs. However, the available review does not document pairings, low-volume control, or behavior with demanding planars and highly sensitive monitors.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
75/100
The supplied information confirms a compact 195g portable chassis with an internal rechargeable battery and vacuum-tube/op-amp hybrid circuit. Reviewers say little about casework, controls, connector durability, heat, or long-term reliability.
Features Usability
82/100
This is a focused balanced portable amplifier, with 4.4mm balanced line/phone input and 4.4mm balanced headphone output. Battery operation is convenient for portable use, but there is no integrated DAC, digital connectivity, gain selection, or alternate headphone output listed.
Value for Money
85/100
At approximately $360, the BA300S MKII occupies a specialist portable tube-amplifier niche. None of the available reviews directly compare its price, performance, or feature set with competing products, so there is little published guidance on its value proposition.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
YouTube Reviews
No reviews found yet
Forum Mentions
No forum mentions found yet
Specifications
- Frequency Response
- 10Hz-50kHz(+/-0.5dB)
- S/N Ratio
- -111dB
- THD+N
- 0.02%
- Tube/Op-amp Type
- Vacuum tube 6N16B+OPAMP
- Analog Input Type
- 4.4mm Line-In/Phone-In (Blanced)
- Analog Output Type
- 4.4mm Phone-Out (Blanced)
- Maximum Power Output
- 350mW+350mW@32̳
- Headphone Impedance
- 8~300̳
- Gain
- 0dB
- Battery Type
- Built-in Rechargeable Lithium-ion Battery
- Charge Time
- Approx. 3 hrs
- Usage Time
- Approx. 8 hrs
- Color
- Black
- Dimensions(W * H * D mm)
- 56*21*120
- Weight
- 195g
- Accessories
- Line Cable (4.4mm to 4.4mm), USB Cable (Charging), self adhesive sheet
Manufacturer's Description — Oriolus
Analog Tube Amplifier
・Full balanced electrical circuit design
・Vacuum tube＋OPAMP, Hybrid system
・No volume control parts, higher sound quality
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