Unison Research Sinfonia
Best valve amplifier for audiophiles seeking rich, pure Class-A sound.
This pure Class-A valve amplifier is a masterclass in sonic warmth and channel separation, prioritizing a rich, immersive soundstage above all else. You sacrifice the clinical precision of modern solid-state gear, but in return, you gain an organic, soul-stirring musicality that makes every listening session feel like a private performance.
$6499.00
at
Verdant Audio
Who it's for
- Minimalists desiring high-end performance in a single integrated unit
- Audiophiles seeking rich, emotive vocal and acoustic reproduction
- Design-conscious listeners wanting a beautiful, handcrafted centerpiece
Who should skip it
- Budget-focused buyers comparing value against solid-state alternatives
- Owners of low-sensitivity speakers in large listening rooms
- Users preferring low-maintenance, cool-running solid-state equipment
Performance breakdown
Sonic Purity
Pure Class-A operation delivers an exceptionally transparent and natural soundstage.
Channel Separation
Dual mono architecture ensures precise imaging and distinct instrument placement.
Build Integrity
Heavyweight construction and wood damping elements minimize unwanted mechanical resonance.
Tube Performance
KT88 valves provide a rich, warm, and harmonically complex listening experience.
Operational Stability
Real-time bias compensation maintains consistent performance without frequent manual adjustments.
Connectivity Versatility
Analog-focused inputs cater to purists but lack modern digital integration.
Key Specs
Type
Dual Mono/Stereo Integrated Valve Amplifier
Amplifier Class
Pure Class-A, Tube
Output Power
25W per channel
Frequency Response
20 – 30000 Hz
Input Impedance
47 kOhm
Output Impedance
4 – 8 ohm
Valves Used
4 x KT88, 2 x ECC82, 2 x ECC83
Net Weight
55 lbs
Dimensions
44 x 42 x 21 cm
Inputs
4 line, 1 tape
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