Rotel RMB-1555 5-Channel Amplifier

Rotel RMB-1555 Five Channel Power Amplifier

The Rotel RMB-1555 is a high-current 5-channel Class AB power amplifier built to bring effortless dynamics, tight control, and refined detail to serious home theater and multichannel music systems. Conservatively rated at 120 watts per channel into 8 ohms with all five channels driven, it delivers the confident headroom and clarity you want for impactful movie soundtracks and lifelike surround playback—without strain. A robust toroidal transformer, discrete output transistors, and premium internal components help the RMB-1555 maintain composure during demanding scenes, keeping dialogue crisp, effects expansive, and bass clean and authoritative. From premium speaker binding posts to 12V trigger control and optional rack ears, it’s engineered as a reliable, installation-friendly powerhouse for medium to large rooms.

The Rotel RMB-1555 is part of ListenUp's Rotel Power Amplifiers Collection.

What It's Good At:

• Driving a full surround setup with true 5-channel power (all channels driven) for consistent, cinematic impact
• Delivering clean dynamics with Class AB amplification for an ideal balance of performance and efficiency
• Maintaining authority and control with a high-current toroidal power supply and discrete output design
• Improving clarity and separation with low distortion and a wide 10Hz–100kHz frequency response
• Integrating cleanly into custom installs using 12V trigger input/output and optional rack-mount ears
• Supporting demanding speakers with 4Ω capability and a solid damping factor of 180

Rotel RMB-1555 Full Specifications:

• Product Type: Multichannel Power Amplifier
• Model: Rotel RMB-1555
• Channels: 5
• Amplifier Design: Class AB
• Power Output (Continuous): 120W/ch (5 channels driven, 8Ω)
• Power Output (Continuous): 170W/ch (5 channels driven, 4Ω)
• Total Harmonic Distortion (THD): < 0.03% (20Hz–20kHz)
• Intermodulation Distortion (IMD): < 0.03% (60Hz:7kHz, 4:1)
• Frequency Response: 10Hz – 100kHz (+0.5, -3dB)
• Signal-to-Noise Ratio: 116dB (IHF “A” weighted / network)
• Gain: 26.5dB
• Damping Factor: 180 (20Hz–20kHz, 8Ω)
• Speaker Impedance: 4Ω minimum
• Inputs: RCA (unbalanced) multichannel analog inputs
• Input Sensitivity: 1.5V
• Input Impedance: 12kΩ
• Speaker Terminals: Heavy-duty binding posts (supports bare wire, spade lugs, or dual banana plug connections; banana use may be restricted in some regions)
• 12V Trigger: Trigger In/Out (3.5mm); trigger input accepts control signal 3V–30V (AC or DC); rear-panel trigger mode selector (manual/trigger)
• Power Requirements (U.S. version): 120V, 60Hz
• Power Requirements (European version): 230V, 50Hz
• Power Consumption: 650W
• Standby Power Consumption: 0.5W
• BTU Rating (4Ω, 1/8th power): 1683 BTU/h
• Dimensions (W × H × D): 431 × 188 × 454mm (17" × 7.5" × 17.9")
• Front Panel Height: 4U / 176.8mm (7")
• Net Weight: 21.8kg (48 lbs.)
• Rack Mounting: Optional rack ears available
• AC Connection: Detachable IEC-type power cord
• Finish/Color Options: Black; Silver available in some regions

Rotel RMB-1555 Q&A:

What makes the RMB-1555 a good choice for home theater?

It delivers true multichannel power with 120W per channel (all five channels driven), helping keep surround effects, dialogue, and music clean and controlled even at higher volumes.

How much power does the RMB-1555 produce per channel?

It’s rated at 120W/ch into 8Ω with all five channels driven, and 170W/ch into 4Ω with all five channels driven.

Does this amplifier work with 4-ohm speakers?

Yes. The RMB-1555 supports speakers down to a 4Ω minimum, providing strong current delivery for more demanding loads.

What inputs does the RMB-1555 use?

The RMB-1555 uses RCA (unbalanced) multichannel analog inputs for straightforward connection to an AV receiver or surround processor’s pre-outs.

Can I automate power on/off with my AV processor?

Yes. It includes 12V trigger input/output (3.5mm) so it can power on automatically when your system sends a trigger signal.

Is the RMB-1555 rack-mountable?

It can be rack-installed using optional rack ears, making it a strong fit for custom theater racks and equipment closets.

How large is the RMB-1555 and will it fit in standard AV furniture?

It measures 431 × 188 × 454mm (17" × 7.5" × 17.9") and has a 4U / 7" front panel height, so check both shelf depth and ventilation clearance.

Does the RMB-1555 run efficiently when not in use?

Yes. It consumes just 0.5W in standby, helping reduce idle power draw without sacrificing readiness.

Rotel RMB-1555 Downloads:

Rotel RMB-1555 Manual
Rotel RMB-1555 Specifications Sheet
Rotel RMB-1555 Drawing