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RB-1581 Monoblock Power Amplifier (Pair)
![ROTEL RB Power Amplifier [] Pair for $](https://lenwallisaudio.com/wp-content/uploads/2024/12/ROTEL-RB-1581-Power-Amplifier-20034-Pair-for-2500-1-scaled.jpg)
![ROTEL RB Power Amplifier [] Pair for $](https://lenwallisaudio.com/wp-content/uploads/2024/12/ROTEL-RB-1581-Power-Amplifier-20034-Pair-for-2500-2-scaled.jpg)
![ROTEL RB Power Amplifier [] Pair for $](https://lenwallisaudio.com/wp-content/uploads/2024/12/ROTEL-RB-1581-Power-Amplifier-20034-Pair-for-2500-3-scaled.jpg)
![ROTEL RB Power Amplifier [] Pair for $](https://lenwallisaudio.com/wp-content/uploads/2024/12/ROTEL-RB-1581-Power-Amplifier-20034-Pair-for-2500-5-scaled.jpg)
RB-1581 Monoblock Power Amplifier (Pair)
$2,000 Was $2,500
The ROTEL RB-1581 Power Amplifier is a high-end monoblock amplifier known for its substantial power output and quality sound reproduction.
Pricing available on application which will includes installation and shipping costs to your nominated location
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Power Output:
The RB-1581 delivers a massive 500 watts of output into 8 ohms, making it suitable for driving even the most demanding speakers. This power is provided in a Class AB configuration, which is known for its balance between efficiency and sound quality.
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Design Concept:
It utilizes Rotel’s Balanced Design Concept, which includes a custom-designed, oversized toroidal transformer and high-efficiency slit foil capacitors in the power supply. These components contribute to stable power delivery and excellent audio performance.
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Inputs and Outputs:
The amplifier offers flexibility with both balanced XLR and unbalanced RCA inputs. There are two sets of 5-way speaker binding posts to support bi-amplification, enhancing sound staging and separation in audio systems.
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Construction:
The RB-1581 features a robust build with 4mm extruded aluminium top and side covers, reflecting a commitment to both performance and aesthetic quality. Its industrial design is complemented by globally sourced sonic electronic components.
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Control Features:
It includes a detachable IEC power cord and a selectable 12-volt trigger with daisy chain output for integration into custom installations, providing ease in setup and control.
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Applications:
This amplifier is ideal for both 2-channel stereo setups and multi-channel installations in custom home theatres, offering power, performance, and precision. It’s available in both black and silver finishes, catering to different aesthetic preferences.
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Performance Notes:
Users have noted that the RB-1581 accurately reproduces audio details, even under high power demands, ensuring that the music’s nuances are maintained at all volume levels.
Technical specifications for the ROTEL RB-1581 Monoblock Power Amplifier:
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Frequency Response: The amplifier operates across a broad frequency range, from 10Hz to 100kHz, ensuring that it can handle both the deep bass and high treble frequencies with accuracy.
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Total Harmonic Distortion (THD): At 20Hz to 20kHz, the THD is less than 0.03%, which indicates a very clean signal output with minimal distortion.
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Damping Factor: The RB-1581 has an impressive damping factor of 800, which allows for better control over speaker movement, leading to tighter bass response and clearer sound reproduction.
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Gain: It offers a gain of 32 dB, which means it can significantly amplify the input signal for powerful output.
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Input Sensitivity:
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For Balanced (XLR) inputs, the sensitivity is 2.5V with an impedance of 100kOhms.
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For Unbalanced (RCA) inputs, it’s 1.6V with an impedance of 12kOhms. This sensitivity ensures compatibility with a wide range of preamplifiers or sources.
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Speaker Load Impedance: The minimum speaker load impedance this amplifier can handle is 4Ω, providing flexibility in matching with different speakers.
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Dimensions: The physical size of the RB-1581 is 431mm (width) x 144mm (height) x 407mm (depth), which reflects its substantial build to accommodate the internal components.
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Weight: At 17.1 kg, its weight is indicative of the quality and quantity of materials used, contributing to stability and durability.
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Power Consumption: Detailed power consumption figures might not be explicitly listed in every source, but given its power output, it’s designed for efficient operation while delivering high power.
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Circuit Design: The amplifier uses discrete power transistors for the output stage, which are known for their superior sound quality compared to integrated circuits in some applications. The layout follows Rotel’s Balanced Design Concept, where the PCB circuit design aims to minimize noise and crosstalk.
These technical aspects highlight Rotel’s focus on delivering high-quality audio performance with the RB-1581, tailored for enthusiasts seeking both power and precision in their audio setups.
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