WestminsterLab REI Monoblock Amplifiers
Best monoblock amplifiers for audiophiles seeking pure Class A sonic performance.
Experience exceptional audio with the WestminsterLab REI Monoblock Amplifiers, designed to bring the renowned musicality of the UNUM amplifier to a wider audience. These amplifiers deliver pure Class A amplification, ensuring pristine sonic purity and substantial power output. Featuring meticulous craftsmanship and premium build quality, the REI offers balanced XLR connectivity for high-fidelity signal transfer. Engineered for audiophiles, they provide an immersive and detailed listening experience with outstanding frequency response and remarkably low distortion, making them an accessible high-fidelity solution.
$32900.00
Owner Satisfaction
4.8
/ 5
Category Rank
277
/ 2552
#277 in Power Amplifiers
Price vs Category Average
+298%
Above average
Amplifier Class
Class A
/ Class A
Who it's for
- Design-conscious listeners who value sculptural aesthetics alongside performance
- Owners of demanding speakers requiring immense power and control
- Audiophiles seeking absolute sonic purity and microscopic detail
Who should skip it
- Listeners with limited rack space or poor ventilation setups
- Budget-conscious buyers seeking high-value audio equipment
- Shoppers requiring local dealer support and easy service access
Performance breakdown
Sonic Purity
Pure Class A topology delivers an exceptionally clean and transparent soundstage.
Power Delivery
Robust output handles demanding speaker loads with effortless authority and control.
Channel Separation
Monoblock architecture eliminates crosstalk for precise and immersive stereo imaging.
Build Integrity
Meticulous craftsmanship ensures long-term reliability and a premium aesthetic presence.
Signal Fidelity
Balanced XLR connectivity maintains signal integrity from source to output stage.
Form Factor Efficiency
Compact footprint packs significant power into a remarkably space-conscious design.
Key Specs
Amplifier Class
Class A
Power Output
100W @ 8Ω, 200W @ 4Ω, 400W @ 2Ω
Bridged Power
400W @ 8Ω, 800W @ 4Ω
Frequency Response
5 Hz to 40 kHz (±0.1 dB)
Signal-to-Noise Ratio
104 dB (A-weighted)
Total Harmonic Distortion
<0.1% @ 1 kHz
Dimensions
W232 x H112 x D320 mm
Weight
16KG
Features
- Monoblock design for superior channel separation
- Pure Class A amplification for sonic purity
- Premium build quality and craftsmanship
- Balanced XLR input and output
- Bridged mode for increased power
- Compact footprint for high-power units
- Accessible high-fidelity alternative
- Exceptional frequency response and low distortion
What customers say
These WestminsterLab REI Monoblock Amplifiers are widely regarded as a reference standard due to their exceptional sonic performance. Reviewers consistently praise the extraordinary transparency and neutrality, noting how the amplifiers allow source material and speakers to fully express themselves. The presentation is dynamic and controlled, delivering deep, articulate power, especially in the bass. Build quality is universally acclaimed, reflecting precision engineering in the elegant chassis. Customers find these monoblocks drive demanding loudspeakers with authority and musicality, offering a rare blend of immense capability and finesse. While the investment is significant, the consensus is that the sonic performance justifies the cost, establishing these as a top tier component in ultra high fidelity audio.
Know before you buy
The monoblock design provides complete physical and electrical separation between channels. This eliminates crosstalk and interference, resulting in a more precise soundstage and improved imaging.
Yes, the REI is bridgeable. In bridged mode, the power output increases significantly, delivering 400W into 8Ω and 800W into 4Ω, which is ideal for driving demanding or low-sensitivity speakers.
Yes, Class A amplifiers are inherently less efficient than Class AB or Class D designs, meaning they generate a significant amount of heat. Ensure you place the units in a well-ventilated area with sufficient clearance for airflow.
The REI features a balanced XLR input with a high input impedance of 200 kΩ, making it compatible with a wide range of high-quality preamplifiers. For the best results, use a preamplifier with balanced XLR outputs to maintain a fully balanced signal path.
No, the REI is not designed for rack mounting. Due to the heat generated by the Class A circuitry, it is best placed on an open shelf or a dedicated audio stand with ample space for ventilation.
Yes, the REI is a dedicated power amplifier and does not include an internal digital-to-analog converter. You will need a separate DAC or a preamplifier with built-in digital inputs to process your digital audio sources.
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