Black Ice Audio Glass FX10H Integrated Tube Amplifier - 12 WPC
The FX10H delivers velvety tube warmth, saturated vocals and a remarkably holographic soundstage from its compact Class A design. HiFi Huff praised its silky midrange and smooth extension, while Reviews By WaveTheory found a rich, detailed and unfatiguing presentation. With self-biasing convenience and unexpectedly controlled bass, it is a distinctive small-room partner for sensitive speakers.
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Nicely Roasted
Sound Quality
90/100
Build Quality
83/100
Features Connectivity
83/100
Value for Money
92/100
Pros
Rich, seductive midrange gives vocals natural texture, warmth and presence.
Strong holographic imaging and three-dimensional spatial presentation without sacrificing detail.
Bass is unusually extended, controlled and substantial for a compact 12W tube integrated.
Smooth, refined treble avoids harsh edges and supports long, non-fatiguing listening.
Cons
Stock-tube dynamics and impact are gentler than more powerful or lively alternatives.
The removable glass case is awkward to fit and makes frequent tube rolling inconvenient.
Its modest output is best for sensitive speakers and smaller rooms; demanding speakers can expose its limits.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 90/100
Reviewers consistently describe a rich, smooth and highly musical tube presentation with unusually convincing space and a refined, extended top end. Its strengths are tonal color, vocal presence and holographic scale; stock-tube dynamics are gentler than outright explosive, and system matching can affect upper-midrange comfort and imaging.
Transparency Resolution
91/100
Reviews By WaveTheory found the FX10H clean, clear and detailed without sounding pushy, noting audible texturing, room reverberation and strong low-level retrieval. HiFi Huff likewise heard more refinement, speed and extension than expected at the price, though the overall presentation remains deliberately tube-rich rather than ruthlessly analytical.
Tonal Balance Musicality
94/100
The dominant impression is of a warm-leaning, tonally dense and velvety sound centered on a seductive midrange, especially with voices. Reviewers praise smooth, non-fatiguing treble and a natural tube glow, although Cheap Audio Man found the upper mids somewhat forward and uncomfortable with one music-and-speaker combination.
Dynamics
84/100
For its modest single-ended Class A output, the FX10H earned praise for bass that is tight, extended and surprisingly substantial. However, Reviews By WaveTheory specifically found dynamic impact and liveliness less convincing with the stock tubes, with a better 12AX7 pair making the sound more impactful and involving.
Soundstage Imaging
91/100
HiFi Huff and Reviews By WaveTheory both heard a large, holographic presentation that projects voices into the room and delivers strong three-dimensionality. Cheap Audio Man also heard impressive layering and holographic qualities, but reported that imaging varied noticeably with speaker pairing.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
83/100
The compact amp was praised for its attractive appearance, small footprint and straightforward setup, and HiFi Huff called it well made. Reviews By WaveTheory raised a substantial usability concern, however, describing the removable case cover as awkward, trial-and-error-prone and unfriendly to handle.
Features Connectivity
83/100
The FX10H keeps things simple with two RCA inputs plus a 3.5 mm line input, 4- and 8-ohm speaker outputs, and self-biasing operation. It adds a single-ended 6.35 mm headphone output and mono subwoofer/pre-out, but has no balanced connections, onboard DAC, phono stage or digital/streaming facilities.
Value for Money
92/100
Reviews place the FX10H at approximately $625 to $800, while the supplied retail range reaches roughly $1,080 depending on version or seller. At those sub-$1,000 prices, HiFi Huff considered its refinement, musical beauty and ease of use unusually compelling, arguing that listeners need not spend thousands for this kind of sound.
Reviews & Sources
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Specifications
- Maximum Power Output
- 12 WPC at 8 ohms, 26Hz to 50KHz with EL84 Tubes 14 WPC at 8 ohms, 26Hz to 50KHz with 7189 tubes
- Rated Output Power
- 10 WPC at 8 ohms, 26Hz to 50KHz with EL84 Tubes 12 WPC at 8 ohms, 26Hz to 50KHz with 7189 tubes
- Frequency Response
- 17Hz to 37KHz + 1dB (at 1 watt into 8 ohms)
- Bandwidth
- 14Hz to 50KHz + 3dB; 0dB = 10 W 1KHz, 8 ohms
- Distortion THD
- Less than 1% at 10 W output, 39Hz to 10KHz, 8 ohms
- Circuit Type
- Single Ended - Class A
- Inputs
- 2x RCA and 1x 3.5mm Line In
- Input Impedance
- 100Kohms
- Input Sensitivity
- Max. 670 mV for 10 watt output at 1KHz
- Output Impedance
- 4 ohms and 8 ohms
- Negative Feedback
- Less than 11 dB
- Noise and Hum
- 91 dB below rated output from 10Hz to 200Khz
- Tube Complement
- 4 x EL84 power output 2 x 12AX7A/ECC83
- Power Requirements
- 110V-120 VAC 60Hz 6 watts-standby, 350 watts maximum (220 VAC 50Hz option)
- Dimensions
- 8 inches wide by 7 inches deep by 7 inches high
- Weight
- 12 pounds net, approximately 16 pounds packaged
- Warranty
- 5 year limited parts and labor and 1 year or 1000 hrs. whichever comes first on Black Ice Audio tubes
- Bias Settings
- Self-biasing
- Fuse
- 110 - 120 VAC, 2 Amp Slow Blow 200 - 240 VAC, 1 Amp Slow Blow, Size 5mm X 20mm
Manufacturer's Description — Black Ice Audio
The Black Ice FX10H is a compact integrated speaker/headphone amplifier with a huge 3D sound. This Dynamo can power most speakers and any hard to drive headphone with up to 14 WPC.
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