Krell Duo XD: Perfect Harmony, Infinite Dynamics
Krell DUO XD Series Stereo Amplifiers
125 175 & 300 XD
Product Overview
The Krell DUO XD Series, including the DUO 125 XD, DUO 175 XD, and DUO 300 XD Stereo Amplifiers, embodies the pinnacle of audio performance. Designed for audiophiles and high-end audio systems, these amplifiers combine advanced circuitry, robust build quality, and Krell's innovative iBias™ Technology. This technology ensures Class A sound quality with greater efficiency, delivering unmatched musicality, dynamics, and control.
Discover the Power of Precision with Krell Duo XD
The Krell Duo XD amplifiers are engineered to bring out the full potential of your audio system, delivering powerful dynamics and exceptional clarity. Whether you're listening to a delicate string quartet or an intense rock performance, the Duo XD amplifiers ensure that every note is reproduced with breathtaking accuracy and control. Experience the perfect balance of power and precision with the Krell Duo XD, and elevate your listening experience to new heights.
Key Features
iBias™ Technology: Delivers Class A sound quality while maintaining efficiency.
Advanced Cooling System: Optimized heat sinks and cooling fans for reliable performance.
Protection Circuitry: Protects against over-current, over-temperature, and short-circuits.
Balanced and Single-ended Inputs: Provides flexible connectivity options.
High-quality Components: Ensures durability and long-term reliability.
Technical Specifications
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Power Output: 125 watts RMS per channel at 8 ohms, 250 watts RMS per channel at 4 ohms
Frequency Response: 20 Hz to 20 kHz +0, -0.08 dB; 0.5 Hz to 100 kHz +0, -3 dB
Total Harmonic Distortion: <0.03% at 1 kHz, at 125 W, 8 ohms; <0.17% at 20 kHz, at 125 W, 8 ohms
Signal-to-Noise Ratio: >95 dB, wideband, unweighted; >112 dB, "A"-weighted
Gain: 25.8 dB
Input Sensitivity: 1.63 V RMS
Input Impedance: Single-ended: 100 kΩ; Balanced: 200 kΩ
Output Voltage: 89.4 V peak-to-peak; 31.6 V RMS
Output Current: 18 A peak
Slew Rate: 40 V/μs
Output Impedance: <0.015Ω, 20 Hz to 20 kHz
Damping Factor: >530, 20 Hz to 20 kHz, referred to 8 ohms
Power Consumption: Standby: 1 W; Idle: 58 W; Maximum: 1350 W
Heat Output: Standby: 3.42 BTU/hr; Idle: 198 BTU/hr; Maximum: 4617 BTU/hr
Inputs: 2 single-ended via RCA connectors; 2 balanced via XLR connectors
Outputs: 2 pairs of binding posts
Dimensions (H x W x D): 17.1 in. W x 7.65 in. H x 21.10 in. D (434 mm W x 194 mm H x 536 mm D)
Weight: 60 lbs (27.3 kg) shipping; 50 lbs (22.7 kg) unit only
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Power Output: 175 watts RMS per channel at 8 ohms, 350 watts RMS per channel at 4 ohms
Frequency Response: 20 Hz to 20 kHz +0, -0.08 dB; 0.5 Hz to 100 kHz +0, -3 dB
Total Harmonic Distortion: <0.03% at 1 kHz, at 175 W, 8 ohms; <0.13% at 20 kHz, at 175 W, 8 ohms
Signal-to-Noise Ratio: >95 dB, wideband, unweighted; >115 dB, "A"-weighted
Gain: 26.2 dB
Input Sensitivity: 1.84 V RMS
Input Impedance: Single-ended: 100 kΩ; Balanced: 200 kΩ
Output Voltage: 106 V peak-to-peak; 37 V RMS
Output Current: 13 A peak
Slew Rate: 40 V/μs
Output Impedance: <0.015Ω, 20 Hz to 20 kHz
Damping Factor: >530, 20 Hz to 20 kHz, referred to 8 ohms
Power Consumption: Standby: 1 W; Idle: 73 W; Maximum: 1500 W
Heat Output: Standby: 3.42 BTU/hr; Idle: 250 BTU/hr; Maximum: 5137 BTU/hr
Inputs: 2 single-ended via RCA connectors; 2 balanced via XLR connectors
Outputs: 2 pairs of binding posts
Dimensions (H x W x D): 17.1 in. W x 7.65 in. H x 21.10 in. D (434 mm W x 194 mm H x 536 mm D)
Weight: 70 lbs (31.8 kg) shipping; 60 lbs (27.3 kg) unit only
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Power Output: 300 watts RMS per channel at 8 ohms, 540 watts RMS per channel at 4 ohms
Frequency Response: 20 Hz to 20 kHz +0, -0.13 dB; 0.5 Hz to 100 kHz +0, -3 dB
Total Harmonic Distortion: <0.045% at 1 kHz, at 400 W, 8 ohms; <0.17% at 20 kHz, at 400 W, 8 ohms
Signal-to-Noise Ratio: >98 dB, wideband, unweighted; >116 dB, "A"-weighted
Gain: 26.2 dB
Input Sensitivity: 2.4 V RMS
Input Impedance: Single-ended: 100 kΩ; Balanced: 200 kΩ
Output Voltage: 138 V peak-to-peak; 49 V RMS
Output Current: 16 A peak
Slew Rate: 40 V/μs
Output Impedance: <0.007Ω, 20 Hz to 20 kHz
Damping Factor: >1140, 20 Hz to 20 kHz, referred to 8 ohms
Power Consumption: Standby: 4 W; Idle: 180 W; Maximum: 1600 W
Heat Output: Standby: 13.7 BTU/hr; Idle: 615 BTU/hr; Maximum: 5677 BTU/hr
Inputs: 2 single-ended via RCA connectors; 2 balanced via XLR connectors
Outputs: 2 pairs of binding posts
Dimensions (H x W x D): 17.1 in. W x 7.65 in. H x 21.10 in. D (434 mm W x 194 mm H x 536 mm D)
Weight: 80 lbs (36.4 kg) shipping; 70 lbs (31.8 kg) unit only
Why Choose Krell DUO XD Series?
Superior Sound Quality
Krell's DUO XD amplifiers deliver the sonic benefits of Class A operation, including natural warmth, detailed imaging, and dynamic range, without the heat and power consumption typically associated with Class A designs.
Versatility & Connectivity
With both balanced and single-ended inputs, the DUO XD series amplifiers offer flexible connectivity options, making them suitable for a wide range of high-end audio systems. This versatility ensures seamless integration into various setups.
Robust Construction
Krell amplifiers are renowned for their durability and reliability, built with high-quality components and designed to last. The heavy-duty chassis and advanced cooling systems ensure consistent performance even under demanding conditions.
Innovative Technology
Krell's iBias™ Technology is a significant advancement in amplifier design, providing the sonic advantages of Class A operation while maintaining efficiency. This technology adjusts the amplifier's bias in real-time, ensuring optimal performance at all times.
The Krell DUO 125 XD, 175 XD, and 300 XD Stereo Amplifiers represent the pinnacle of high-fidelity audio performance. These amplifiers deliver exceptional power, clarity, and precision, making them perfect for any high-end audio system. With Krell's renowned build quality, innovative technology, and versatile connectivity options, the DUO XD series amplifiers set a new standard for stereo audio performance.