Rotel RMB-1504 Four Channel Power Amplifier
The Rotel RMB-1504 is a high-performance Class AB 4-channel power amplifier built for clean, controlled power in home theater and custom installation / multi-room audio systems. With 70 watts per channel into 8Ω (all channels driven) and the muscle to handle 4Ω speaker loads, it’s an ideal solution for driving in-ceiling/height speakers for immersive surround formats, distributed audio zones, or any setup that demands stable, low-noise amplification.
Installation is where the RMB-1504 really shines: rack mounting support, front-panel level controls, input linking and mono options, plus 12V trigger in/out and automatic signal-sensing power make it easy to integrate with AV receivers, processors, and whole-home control systems. Internally, Rotel’s oversized toroidal transformer, high-efficiency capacitors, and high-current output devices are engineered for fast transients, strong bass control, and consistent performance—even with long cable runs and challenging speaker loads.
The Rotel RMB-1504 is part of ListenUp's Rotel Power Amplifiers Collection.
What It's Good At:
- Delivering clean, dynamic 4-channel Class AB power for home theater and multi-zone audio
- Driving overhead/height speakers with clarity for immersive surround installations
- Offering installer-friendly control with front-panel input level attenuators
- Supporting flexible system layouts with input linking, mono switching, and output link connections
- Simplifying integration using 12V trigger in/out and auto signal-sensing power-on
- Maintaining tight, controlled sound with a high damping factor and robust power supply design
Rotel RMB-1504 Full Specifications:
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Amplifier Type: Class AB, 4-channel power amplifier
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Channels: 4
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Continuous Power Output (8Ω): 4 × 70 W/ch (20Hz–20kHz, <0.03% THD, all channels driven)
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Continuous Power Output (4Ω): 4 × 115 W/ch (DIN 1kHz, 1.0% THD, all channels driven)
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Total Harmonic Distortion (THD):
- (20Hz–20kHz, 8Ω) <0.03%
- Continuous rated power: <0.03%
- One-half rated power: <0.03%
- 1 watt power: <0.03%
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Intermodulation Distortion: (60Hz:7kHz, 4:1) <0.03%
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Frequency Response: 10Hz – 100kHz (±1dB)
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Signal-to-Noise Ratio: 115 dB (IHF “A” weighted / IHF A)
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Gain: 26 dB
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Damping Factor: >200 (20Hz–20kHz, 8Ω)
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Crosstalk / Separation: >50 dB
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Speaker Impedance: 4Ω minimum
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Input Sensitivity: 1.0 V
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Input Impedance: 20 kΩ
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Input Overload Level: 5.0 V
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Auto Turn-On Level (Signal Sense, all inputs): 4 mV input signal
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Power Control Options: Manual, Automatic signal sensing, 12V trigger control
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12V Trigger: Input and output connections
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Front Panel Controls: Input level controls / volume attenuators (per channel)
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Connectivity / Installation Features: Input linking, input mono switch, signal output link connectors
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Speaker Terminals: 5-way binding posts (supports dual banana type connectors; restricted in some EU countries)
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Rack Mounting: Rack ears included (some markets); rack mount capability supported
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Protection: Protection circuitry against fault conditions with front-panel indicators
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Power Requirements:
- U.S. version: 120V, 60Hz
- European version: 230V, 50Hz
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Power Consumption:
- 300 W (idle)
- 300 W (4Ω, 1/8 power)
- Site listing also notes 450 W power consumption
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Standby Power Consumption:
- Standby: <0.5 W
- Signal Sense: 1 W
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BTU Rating: 810 BTU/h
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Dimensions (W × H × D): 431 × 144 × 443 mm (17" × 5.7" × 17.5")
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Front Panel Height: 3U / 132.6 mm (5.25")
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Net Weight: 14.9 kg (32.8 lbs.)
Rotel RMB-1504 Q&A:
- What is the RMB-1504 best used for?
- It’s designed for home theater and custom installation, including powering height/overhead speakers, multi-room zones, or any setup needing clean 4-channel amplification.
- How much power does it deliver per channel?
- It delivers 70W per channel into 8Ω (all channels driven) and 115W per channel into 4Ω (DIN 1kHz, 1.0% THD).
- Can it handle 4-ohm speakers?
- Yes. The RMB-1504 is rated for 4Ω minimum speaker impedance, making it suitable for many real-world architectural and in-room speaker loads.
- Does it support rack mounting?
- Yes. It’s built with custom installation in mind and supports rack mounting (rack ears are included in some markets).
- How does it turn on and off in an installed system?
- You can power it manually, use automatic signal sensing, or control it through a 12V trigger for seamless integration with processors and control systems.
- Can I match levels between channels or zones?
- Yes. The front panel includes input level controls / attenuators to fine-tune channel gain and match speaker sensitivity across a system.
- Can it simplify wiring for multi-channel setups?
- Yes. It includes input linking, an input mono switch, and signal output link connectors to streamline routing and expand configuration options.
- Is it designed to protect itself and connected speakers?
- Yes. It includes protection circuitry for fault conditions, along with front-panel indicators for clear status monitoring.
Rotel RMB-1504 Downloads:
Rotel RMB-1504 Manual
Rotel RMB-1504 Specifications Sheet
Rotel RMB-1504 Drawing
