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Power:
4 Ohm: 150 x 2 Watts RMS < 1 % THD
8 Ohm: 100 x 2 Watts RMS < 1 % THD
8 Ohm BTL: 300 x 1 Watts RMS < 1% THD
Features:
Low DistortionWith a THD+N of 0.05%, this amplifier ensures clean and accurate sound reproduction.
Signal-to-Noise Ratio (SNR)An impressive -104dBA SNR means minimal unwanted noise, providing a pristine listening experience.
Balanced Inputs and Secure Connectors:
XLR Balanced InputAudiophiles will appreciate the XLR input, which minimizes interference and maintains signal integrity.
Tiffany RCA InputsWe use high quality Tiffany RCA inputs to ensure compatibility with common audio sources.
Gold-Plated 5-Way Binding PostsThese binding posts securely hold speaker wires, preventing them from coming loose. Whether you’re an audiophile or an everyday listener, this feature ensures reliable connections.
Isolated Power Supply and Clean Wiring:
Electro-magnetically isolated power supplyMinimizes interference and ensures clean power delivery.
Thick Gauge Internal WiringThe use of thick-gauge wiring, secured via full-sized molex connectors, contributes to overall stability and performance.
Cool and Solid DesignThe entire casing doubles as a heatsink, dissipating heat efficiently. Even at maximum volumes, the amplifier stays cool.
Internal Power SupplyEnsures no EMI interference for clean sound.
High-Quality Chipset: MA5332The MA5332 chipset is a multichip module (MCM) that integrates a dual-channel PWM controller, high-voltage gate driver, and four low R<sub>DS(ON)</sub> MOSFETs. What’s remarkable is that it delivers the same or even higher output power as monolithic alternatives without requiring a heatsink. This compact design saves space and enhances efficiency.
BTL (Bridged Tied Load)This feature allows you to combine all the power to a single channel. You can run two of these amplifiers to two speakers, getting more power and achieving a discrete amplifier for each speaker.
Specifications:
6.5Hz-33kHz (@ -3dB)
Crosstalk: -72dB @5kHz
THD+N: <0.05%
Signal to Noise Ratio: -104dBA
Efficiency: > 95%
Weight: 4.5Lbs
Dimensions (Inches): 3.2” x 4.75” x 7”
This US$135 asking price is a strong deal, landing well below the 25th percentile of US$89 in our database of 60 recent comparable USD listings, where the median sits at US$284. At this level, you are paying significantly less than the typical used market floor for this amplifier class, making it an excellent buying opportunity for a fellow enthusiast looking for clean power without the usual markup.
The Rockville LUX 300 delivers a solid 300w RMS per channel and features XLR inputs for professional-grade connectivity, appealing to those who value robust headroom and audiophile signal integrity. Since the listing notes "clean power" and the price is so far below the 75th percentile of US$687, there is little reason to hedge; this is a rare chance to secure a well-regarded, high-output amp at a bargain price that demands attention.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Quantum Science Audio (QSA) emerged in early 2020 under the leadership of Steven Tsang, an electronic engineering expert with deep roots in audio consulting. Based in Scottsdale, Arizona, with ties to Hong Kong where Tsang honed his expertise, the brand quickly carved a niche through relentless innovation in power components. Drawing from over two decades of proprietary research, QSA embodies a fusion of technical discipline and audio obsession, prioritizing subtle yet profound system enhancements.
The company's focus centers on high-performance aftermarket fuses, including thermal, slow-blow, automotive, and specialized AC variants like inlets, outlets, and panel breakers. QSA also extends into power receptacles and related accessories, all engineered to eliminate so-called "bottlenecks" in signal paths. Their lineup spans accessible entry points at around $28 to ultra-premium models commanding exorbitant prices, reflecting escalating tiers of advanced materials and quantum-inspired treatments.
In the hi-fi market, QSA occupies a polarizing boutique position among high-end enthusiasts, celebrated by some for transformative sound improvements in power delivery. Top models attract audiophiles chasing marginal gains, though skeptics dismiss the claims as overreach amid long production lead times. This niche status suits discerning buyers open to experimental upgrades in an otherwise crowded field.
See all Quantum Science Audio listings on RADAR.
