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The Rotel RB-1552 MkII stereo power amplifier delivers 130W per channel (8 ohms) with a refined Class AB design built for detail, dynamics, and control. An essentially mono-block internal layout with premium slit-foil capacitors provides fast transient response and confident speaker grip. Choose balanced XLR or unbalanced RCA inputs, and integrate easily using 12V trigger in/out and rack-ready hardware. With low distortion, wide frequency response, and robust build quality, it’s an ideal upgrade for high-performance two-channel audio systems.
Get the Details
Features & Specs
High-current Class AB power (130W/ch into 8 Ω)
Delivers clean, musical power with the warmth and control that Class AB designs are known for—ideal for revealing speakers and high-resolution listening.
Strong 4-ohm performance (185W/ch into 4 Ω)
Provides the extra current and headroom needed to keep bass tight and transients effortless when driving more demanding loudspeakers.
Balanced and unbalanced connectivity
Offers XLR balanced inputs for lower noise and longer cable runs, plus RCA unbalanced inputs for broad compatibility—selected via a rear input switch.
Energy reserve for real-world dynamics
Slit-foil capacitors supply substantial stored energy and fast replenishment, helping the amplifier stay composed during explosive crescendos and complex passages.
System integration with 12V trigger
Use trigger control for synchronized power on/off with your preamp, processor, or automation system, plus trigger output to pass control to additional components.
Install-ready build and protection
Includes rack ears for clean installs and features thermal/over-current protection designed to safeguard performance without compromising sound quality.
High-current Class AB power (130W/ch into 8 Ω)
Delivers clean, musical power with the warmth and control that Class AB designs are known for—ideal for revealing speakers and high-resolution listening.
Strong 4-ohm performance (185W/ch into 4 Ω)
Provides the extra current and headroom needed to keep bass tight and transients effortless when driving more demanding loudspeakers.
Balanced and unbalanced connectivity
Offers XLR balanced inputs for lower noise and longer cable runs, plus RCA unbalanced inputs for broad compatibility—selected via a rear input switch.
Energy reserve for real-world dynamics
Slit-foil capacitors supply substantial stored energy and fast replenishment, helping the amplifier stay composed during explosive crescendos and complex passages.
System integration with 12V trigger
Use trigger control for synchronized power on/off with your preamp, processor, or automation system, plus trigger output to pass control to additional components.
Install-ready build and protection
Includes rack ears for clean installs and features thermal/over-current protection designed to safeguard performance without compromising sound quality.
Expert Insight
Modestly priced audio products may not be able to produce the “absolute sound,” but the best of them can fully deliver the heart of the high end. Rotel’s RB-1552 Mk II falls decisively into this category. Through the RB-1552 Mk II, strings are properly rich, bass is weighty, and the piano possesses a lovely round tone. Microdynamics and tiny tempo variations come through clearly, too, allowing the listener to hear the give-and-take between players. The amp also delivers robust dynamics, a broad soundstage, well-placed images, and infectious timing. Another Rotel winner.
the absolute sound
Details
RB-1552 MkII
The Rotel RB-1552 MkII is a high-performance stereo power amplifier designed to deliver clean, authoritative power with the control and finesse audiophiles expect from a true Class AB design. Rated at 130 watts per channel into 8 ohms (and 185 watts per channel into 4 ohms), it drives demanding speakers with ease while preserving the detail, imaging, and dynamics that bring recordings to life.
Built with Rotel’s meticulous engineering approach, the RB-1552 MkII features independent left/right power rectification and decoupling in an essentially mono-block style layout to reduce crosstalk and improve channel separation. Premium British-engineered slit-foil capacitors provide deep energy reserves for explosive transients and fast recovery during complex musical passages. With both balanced XLR and unbalanced RCA inputs (selectable via rear switch), plus 12V trigger in/out for seamless system integration, it’s an ideal power-amp upgrade for serious two-channel and custom-installed audio systems.
Signal-to-Noise Ratio (IHF “A” / A network): 120 dB
Damping Factor (20–20,000 Hz, 8 Ω): 450
Speaker Impedance: 4 Ω minimum
Inputs: Balanced XLR and Unbalanced RCA (rear-panel input selector switch)
Input Sensitivity:
RCA (Unbalanced): 1.5 V
XLR (Balanced): 2.5 V
Input Impedance:
RCA (Unbalanced): 12 kΩ
XLR (Balanced): 100 kΩ
Gain:
RCA (Unbalanced): 26.5 dB
XLR (Balanced): 22.5 dB
12V Trigger: Input and Output (3.5 mm); trigger input accepts control signals from 3 V to 30 V (AC or DC)
Protection: Thermal and over-current protection circuitry
Rack Mounting: Rack ears included
Dimensions (W × H × D): 431 × 144 × 339 mm (17" × 5.7" × 13.4")
Front Panel Height: 3U / 132.6 mm (5.25")
Power Requirements:
U.S. version: 120 V, 60 Hz
European version: 230 V, 50 Hz
Power Consumption: 400 W
Standby Power Consumption: 0.5 W
BTU Rating (4 Ω, 1/8th power): 905 BTU/h
Net Weight: 12.4 kg (27 lbs)
Rotel RB-1552 MkII Q&A:
How much power does the Rotel RB-1552 MkII deliver per channel?
It delivers 130 watts per channel into 8 ohms and 185 watts per channel into 4 ohms, providing strong headroom for dynamic music and demanding speakers.
Is the RB-1552 MkII stable with 4-ohm speakers?
Yes. It’s rated for 4-ohm minimum speaker loads and is designed to maintain control and clarity when driving more current-hungry systems.
Does this amplifier support balanced XLR connections?
Yes. It includes balanced XLR inputs as well as unbalanced RCA inputs, selectable via a rear-panel input switch.
Can I connect both RCA and XLR inputs at the same time?
It’s best to use only one input method at a time (either RCA or XLR) and select the correct input type with the rear input selector switch.
Does the RB-1552 MkII have a 12V trigger for system automation?
Yes. It includes 12V trigger IN and OUT via 3.5 mm jacks, and the trigger input accepts 3–30V (AC or DC) control signals for flexible integration.
Can I rack mount the RB-1552 MkII?
Yes. It’s rack-friendly with a 3U front panel height and rack ears included for clean installation.
What protections are built in to keep the amplifier safe?
It uses thermal and over-current protection that monitors operating conditions and shuts down safely if limits are exceeded, then automatically resets once conditions normalize.
What are the physical size and weight of the RB-1552 MkII?
It measures 431 × 144 × 339 mm and weighs 12.4 kg (27 lbs), making it a substantial, power-focused component suitable for serious systems.
Great overall quality of sound and will get as loud as I would ever want, but does get pretty hot.
Product Description
Product Description
The Rotel RB-1552 MkII stereo power amplifier delivers 130W per channel (8 ohms) with a refined Class AB design built for detail, dynamics, and control. An essentially mono-block internal layout with premium slit-foil capacitors provides fast transient response and confident speaker grip. Choose balanced XLR or unbalanced RCA inputs, and integrate easily using 12V trigger in/out and rack-ready hardware. With low distortion, wide frequency response, and robust build quality, it’s an ideal upgrade for high-performance two-channel audio systems.
Get the Details
Features & Specs
Features & Specs
High-current Class AB power (130W/ch into 8 Ω)
Delivers clean, musical power with the warmth and control that Class AB designs are known for—ideal for revealing speakers and high-resolution listening.
Strong 4-ohm performance (185W/ch into 4 Ω)
Provides the extra current and headroom needed to keep bass tight and transients effortless when driving more demanding loudspeakers.
Balanced and unbalanced connectivity
Offers XLR balanced inputs for lower noise and longer cable runs, plus RCA unbalanced inputs for broad compatibility—selected via a rear input switch.
Energy reserve for real-world dynamics
Slit-foil capacitors supply substantial stored energy and fast replenishment, helping the amplifier stay composed during explosive crescendos and complex passages.
System integration with 12V trigger
Use trigger control for synchronized power on/off with your preamp, processor, or automation system, plus trigger output to pass control to additional components.
Install-ready build and protection
Includes rack ears for clean installs and features thermal/over-current protection designed to safeguard performance without compromising sound quality.
High-current Class AB power (130W/ch into 8 Ω)
Delivers clean, musical power with the warmth and control that Class AB designs are known for—ideal for revealing speakers and high-resolution listening.
Strong 4-ohm performance (185W/ch into 4 Ω)
Provides the extra current and headroom needed to keep bass tight and transients effortless when driving more demanding loudspeakers.
Balanced and unbalanced connectivity
Offers XLR balanced inputs for lower noise and longer cable runs, plus RCA unbalanced inputs for broad compatibility—selected via a rear input switch.
Energy reserve for real-world dynamics
Slit-foil capacitors supply substantial stored energy and fast replenishment, helping the amplifier stay composed during explosive crescendos and complex passages.
System integration with 12V trigger
Use trigger control for synchronized power on/off with your preamp, processor, or automation system, plus trigger output to pass control to additional components.
Install-ready build and protection
Includes rack ears for clean installs and features thermal/over-current protection designed to safeguard performance without compromising sound quality.
Expert Insight
Expert Insight
Modestly priced audio products may not be able to produce the “absolute sound,” but the best of them can fully deliver the heart of the high end. Rotel’s RB-1552 Mk II falls decisively into this category. Through the RB-1552 Mk II, strings are properly rich, bass is weighty, and the piano possesses a lovely round tone. Microdynamics and tiny tempo variations come through clearly, too, allowing the listener to hear the give-and-take between players. The amp also delivers robust dynamics, a broad soundstage, well-placed images, and infectious timing. Another Rotel winner.
the absolute sound
Details
Details
RB-1552 MkII
The Rotel RB-1552 MkII is a high-performance stereo power amplifier designed to deliver clean, authoritative power with the control and finesse audiophiles expect from a true Class AB design. Rated at 130 watts per channel into 8 ohms (and 185 watts per channel into 4 ohms), it drives demanding speakers with ease while preserving the detail, imaging, and dynamics that bring recordings to life.
Built with Rotel’s meticulous engineering approach, the RB-1552 MkII features independent left/right power rectification and decoupling in an essentially mono-block style layout to reduce crosstalk and improve channel separation. Premium British-engineered slit-foil capacitors provide deep energy reserves for explosive transients and fast recovery during complex musical passages. With both balanced XLR and unbalanced RCA inputs (selectable via rear switch), plus 12V trigger in/out for seamless system integration, it’s an ideal power-amp upgrade for serious two-channel and custom-installed audio systems.
Signal-to-Noise Ratio (IHF “A” / A network): 120 dB
Damping Factor (20–20,000 Hz, 8 Ω): 450
Speaker Impedance: 4 Ω minimum
Inputs: Balanced XLR and Unbalanced RCA (rear-panel input selector switch)
Input Sensitivity:
RCA (Unbalanced): 1.5 V
XLR (Balanced): 2.5 V
Input Impedance:
RCA (Unbalanced): 12 kΩ
XLR (Balanced): 100 kΩ
Gain:
RCA (Unbalanced): 26.5 dB
XLR (Balanced): 22.5 dB
12V Trigger: Input and Output (3.5 mm); trigger input accepts control signals from 3 V to 30 V (AC or DC)
Protection: Thermal and over-current protection circuitry
Rack Mounting: Rack ears included
Dimensions (W × H × D): 431 × 144 × 339 mm (17" × 5.7" × 13.4")
Front Panel Height: 3U / 132.6 mm (5.25")
Power Requirements:
U.S. version: 120 V, 60 Hz
European version: 230 V, 50 Hz
Power Consumption: 400 W
Standby Power Consumption: 0.5 W
BTU Rating (4 Ω, 1/8th power): 905 BTU/h
Net Weight: 12.4 kg (27 lbs)
Rotel RB-1552 MkII Q&A:
How much power does the Rotel RB-1552 MkII deliver per channel?
It delivers 130 watts per channel into 8 ohms and 185 watts per channel into 4 ohms, providing strong headroom for dynamic music and demanding speakers.
Is the RB-1552 MkII stable with 4-ohm speakers?
Yes. It’s rated for 4-ohm minimum speaker loads and is designed to maintain control and clarity when driving more current-hungry systems.
Does this amplifier support balanced XLR connections?
Yes. It includes balanced XLR inputs as well as unbalanced RCA inputs, selectable via a rear-panel input switch.
Can I connect both RCA and XLR inputs at the same time?
It’s best to use only one input method at a time (either RCA or XLR) and select the correct input type with the rear input selector switch.
Does the RB-1552 MkII have a 12V trigger for system automation?
Yes. It includes 12V trigger IN and OUT via 3.5 mm jacks, and the trigger input accepts 3–30V (AC or DC) control signals for flexible integration.
Can I rack mount the RB-1552 MkII?
Yes. It’s rack-friendly with a 3U front panel height and rack ears included for clean installation.
What protections are built in to keep the amplifier safe?
It uses thermal and over-current protection that monitors operating conditions and shuts down safely if limits are exceeded, then automatically resets once conditions normalize.
What are the physical size and weight of the RB-1552 MkII?
It measures 431 × 144 × 339 mm and weighs 12.4 kg (27 lbs), making it a substantial, power-focused component suitable for serious systems.
