The Crescendo REVOLUTION 7A4 4 Channel Amplifier represents the pinnacle of car audio engineering, delivering exceptional sound reproduction with absolute neutrality that audiophiles and industry professionals demand. This flagship amplifier from Crescendo's Revolution series combines cutting-edge technology with premium components to create an unparalleled listening experience in your vehicle.
Superior Audio Engineering
The Revolution 7A4 achieves perfect balance between detail and musicality through its advanced high-bias Class AB design. The amplifier's exceptional sound reproduction is distinguished by absolute neutrality, making it the preferred choice among audiophiles and industry professionals. This 4 channel pure amplifier delivers 4 x 150W @ 4 Ohm with 2 x 400W @ 4 Ohm bridged capability.
Premium Component Selection
The amplifier incorporates audio-grade components, ensuring an outstanding audio experience that transcends the ordinary. Features include high end Burr Brown OPA 1642 preamp chip and high end Sanken Final Transistor for exceptional sound quality. The dual symmetrical power supply with shielded transformers ensures stable, clean power delivery to all channels.
Professional Installation Ready
Designed for serious audio enthusiasts, the Revolution 7A4 focuses purely on amplification without built-in signal processing, allowing external DSP systems to handle crossover and EQ functions. The amplifier achieves frequency response from 5 Hz to 100 kHz, enabling high-resolution music playback with THD of just 0.0035% and Signal to Noise Ratio of 110dB.
The Revolution 7A4 delivers transparent, neutral sound reproduction that reveals every detail in your music. The high-bias Class AB design ensures minimal distortion while preserving the warmth and dynamics that bring music to life. Unlike amplifiers with built-in processing, this pure amplifier design lets you hear exactly what your source material contains.
Advanced Power Management
The dual symmetrical power supply provides exceptional stability and clean power delivery across all operating conditions. Shielded transformers minimize electromagnetic interference, while large reservoir capacitors ensure consistent power during dynamic musical passages. This engineering approach eliminates the power supply fluctuations that can compress dynamics and muddy your sound.
Professional Component Selection
Every component in the Revolution 7A4 has been selected for maximum audio performance. The Burr Brown OPA 1642 preamp chip provides ultra-low noise and distortion, while Sanken Final Transistors deliver the current needed for demanding speaker loads. Elna audio-grade capacitors in the signal path maintain phase coherence and frequency response accuracy.
Thermal Management Excellence
The massive aluminum heatsink and intelligent thermal design keep operating temperatures low even during extended high-power operation. This ensures consistent performance and extends component life, while the low-profile design allows installation in tight spaces without compromising cooling efficiency.
Installation Flexibility
The compact footprint and low-profile design make installation possible in various vehicle locations. The pure amplifier approach enables seamless integration with any DSP system, providing complete control over crossover points, time alignment, and EQ settings tailored to your specific acoustic environment.
High-Resolution Audio Ready
With a frequency response that extends from 5 Hz to 100 kHz, the Revolution 7A4 reproduces high-resolution audio files with complete fidelity. The extended bandwidth ensures you hear all the detail in modern high-quality recordings, while the ultra-low THD of 0.0035% keeps distortion virtually inaudible.
What makes the Crescendo Revolution 7A4 different from other 4-channel amplifiers?
The Revolution 7A4 stands apart through its pure amplifier design philosophy and premium component selection. Unlike most amplifiers that include built-in crossovers and bass boost, this amplifier focuses solely on clean, neutral amplification. It uses high-end components like Burr Brown preamp chips and Sanken transistors typically found in much more expensive audiophile equipment. The result is exceptional transparency and detail that reveals nuances in your music other amplifiers simply cannot reproduce.
Can I use the Revolution 7A4 without an external DSP processor?
While the Revolution 7A4 can function without a DSP, it's designed to work best with external signal processing. The amplifier lacks built-in crossovers, EQ, and bass boost features, as these can negatively impact sound quality. For optimal performance, pair it with a quality DSP unit that handles crossover duties and allows precise tuning for your specific speakers and vehicle acoustics. This approach provides superior sound quality compared to amplifiers with built-in processing.
high-quality DSP unit that handles crossover duties and allows for precise tuning to match
Is the Revolution 7A4 suitable for sound quality competition?
Absolutely. The Revolution 7A4 was specifically designed with sound quality competition in mind. Its neutral, transparent sound reproduction and exceptional signal-to-noise ratio make it ideal for critical listening scenarios. Many audio professionals and competition enthusiasts choose this amplifier because it doesn't color the sound, allowing the true character of their source material and speakers to shine through. The premium components and meticulous engineering provide the resolution required for high-quality sound installations.
How does the bridging capability work on this amplifier?
Bridging combines two channels to drive a single speaker with increased power output. On the Revolution 7A4, you can bridge channels 1+2 and 3+4 to create two high-power channels delivering 400W RMS each at 4 ohms. This configuration is ideal for driving demanding speakers or subwoofers that require more power than a single channel can provide. The bridged output maintains the same audio quality while significantly increasing power delivery.
What installation considerations are important for the Revolution 7A4?
Proper installation requires adequate ventilation around the massive aluminum heatsink, secure mounting away from moving parts, and high-quality power and ground connections. Use a power wire of the appropriate size for the amplifier's current draw, and ensure the mounting location provides sufficient airflow. The low-profile design allows installation in tight spaces, but never compromise on ventilation. Professional installation is recommended to achieve optimal performance and ensure proper integration with your audio system.
Can this amplifier power subwoofers effectively?
Yes, the Revolution 7A4 excels at powering subwoofers, especially when bridged. Each bridged channel pair delivers 400W RMS at 4 ohms, providing ample power for most subwoofer applications. The extended frequency response down to 5 Hz ensures accurate bass reproduction, while the clean power delivery maintains tight, controlled bass response. For best results, use an external DSP to set appropriate crossover points and optimize the subwoofer integration with your system.
What type of input cables should I use with this amplifier?
Use high-quality RCA interconnect cables to connect your source unit or DSP to the Revolution 7A4. Shielded cables help prevent noise interference, especially in installations with long cable runs. Keep RCA cables away from power wires to minimize potential noise pickup. The amplifier's high-quality input stage can resolve differences in cable quality, so investing in good interconnects will be audible in your system's performance.
Overview
Specifications
Owners Manual
Reviews
Related Video
