OAD Ultrafidelity – Vajra Power Amplifier Review – In the ever-evolving world of high-fidelity amplification, few products command as much respect as the Vajra. From the moment you power it on, this Class AB marvel delivers an audiophile-grade performance that will leave you reaching for the phone to speak with our team at The Audio Tailor. Whether you’re driving demanding speakers in a spacious living area or refining every detail in a two-channel reference rig, the Vajra sets a new standard in musical accuracy and dynamic authority.
Design & Build Quality
Visually, the Vajra exudes a purposeful elegance. Its fully CNC-machined aluminium chassis, available in Silver or Black, feels rock-solid yet refined. The large, high-visibility power meters perched front and centre aren’t just for show—they give real-time insight into output levels and operating mode. This robust enclosure is more than an aesthetic statement; its inert construction minimises resonances, ensuring every component operates in an acoustically neutral environment.
Key design highlights:
• Class A operation for the first 15 Watts per channel, transitioning to a high-current Class AB topology
• Single-ended and true balanced input stages using super-matched transistors—no DC servo loops, just pure analogue fidelity
• Proprietary Slit Foil Electrolytic Audio Capacitors in the power supply, a world first that dramatically reduces ESR and enhances transient response
• Built-in mains filter and DC blocker for rock-solid clean power
Technical Excellence Under the Hood
The Vajra’s spec sheet reads like a handbook of audiophile priorities:
• 180 W/channel into 8 Ω | 360 W/channel into 4 Ω at 240 VAC
• Frequency response: 0 Hz–100 kHz (-3 dB)
• Damping factor: > 500
• THD: 0.001% at 1 kHz (0–100 kHz bandwidth)
• Noise floor: < –100 dBu (0–22 kHz, Rs = 50 Ω)
With a gain of 27 dB and an input sensitivity of 4 V (balanced) or 2 V (single-ended), the Vajra accommodates a wide variety of pre-amplifiers and sources. Its high damping factor ensures rock-solid control over even the most challenging speaker loads, translating into tight, authoritative bass and a neutral midband.
What truly sets the Vajra apart is its uncanny ability to weave micro-detail into a seamless, three-dimensional soundstage. The low noise floor and vanishingly low distortion reveal the subtlest nuances in vocals and instruments—whether it’s the texture of a double bass string or the decay of a grand piano’s pedal. Dynamics are where the Vajra truly shines: transients snap with precision, and climactic crescendos maintain composure without ever sounding strained.
Listeners will note:
• Immaculate clarity across the frequency spectrum – from sub-sonic rumble to air-laced treble
• Effortless control over complex passages – no congestion even at high volumes
• Wide, holographic imaging that places performers in a convincing soundstage
Each listening session becomes an invitation to rediscover familiar recordings with a newfound sense of realism. If you’ve been chasing amps that combine warmth, dynamics and pinpoint accuracy, the Vajra delivers in spades.
Who Should Consider the Vajra?
The OAD Ultrafidelity Vajra is built for the discerning audiophile or home theatre enthusiast who demands uncompromised performance. Ideal pairings include:
• High-sensitivity floorstanders that benefit from Class A linearity in the first 15 W
• Low-impedance, reference-grade speakers that require substantial headroom and damping
• Two-channel systems where minute detail and soundstage depth are paramount
If you crave an amplifier that morphs your listening room into a live venue—or if you need the muscle to drive large speakers without flinching—the Vajra is your ultimate ally. For personalised advice on integrating the Vajra into your setup, don’t hesitate to call our experts at The Audio Tailor on 1300 308 711 or drop us an email at sales@theaudiotailor.com.au.
Pros & Cons
Pros
• Exceptional detail retrieval and dynamic range
• Ultra-low distortion (0.001% THD) and noise floor (< –100 dBu)
• Robust Class A/AB design with super-matched transistors
• Innovative Slit Foil Electrolytic Capacitors for rapid current delivery
• High damping factor (> 500) for superb speaker control
• Built-in mains filter and DC blocker for clean, stable power
Cons
• Physical weight and size require a sturdy rack or shelf
• Premium price point reflects its cutting-edge technology
Why the Vajra Power Amplifier Stands Out
In a crowded marketplace of power amplifiers, the OAD Ultrafidelity Vajra distinguishes itself through engineering ingenuity and musical integrity. Its unique combination of Class A purity, high-current Class AB muscle, and pioneering power supply innovations delivers an emotional, spine-tingling listening experience. From the first note, you’re immersed in a level of realism and dynamic authority that few amplifiers can match.
Curious to hear the Vajra for yourself? Explore the full details and place an order via the official product page: OAD Ultrafidelity – Vajra Power Amplifier.
Ready to elevate your audio journey? Speak with our friendly team at The Audio Tailor to tailor the perfect high-fidelity solution for your setup.
