Rotel RMB-1504 4-Channel CI Power Amplifier (70W x4) | RMB-1504

Rotel RMB-1504 4-Channel Distribution Power Amplifier

The Rotel RMB-1504 is a 4-channel Class AB amplifier designed for custom installation: two stereo zones, theater expansion (heights/wides), or dedicated amplification for distributed audio where you need rack-friendly control features. It delivers 70 W/ch into 8 Ω or 115 W/ch into 4 Ω (all channels driven) and adds front-panel attenuation controls, signal-sensing auto power, 12V trigger in/out, and RCA loop outputs for clean system scaling.

Dealer Quick Fit

• Best for: 2-zone stereo distribution (4 channels) or adding surround/height channels in rack-based theaters
• Power: 4 × 70 W/ch (8 Ω, all channels driven) • 4 × 115 W/ch (4 Ω, all channels driven)
• Inputs: 2 × stereo RCA pairs (feeds 4 channels)
• Installer controls: front-panel attenuation controls (per channel)
• Automation: signal sensing + 12V trigger in/out
• Expansion: RCA loop outputs for daisy-chaining additional amplifiers
• Rack: 3U front-panel height; rack ears included

Why Dealers Care

• Distribution-ready: purpose-built for two stereo zones with level matching at the amp—no DSP required for basic balancing.
• Predictable automation: choose signal-sense for simple installs or 12V trigger for deterministic control-system behavior.
• Easy scaling: loop outputs simplify expansion when one chassis isn’t enough for the channel count.
• 4 Ω capability: supports typical in-wall/in-ceiling speaker loads and many distributed-audio layouts when wired correctly.

How the Inputs Work (CI-Friendly)

• Input pairs: two stereo RCA inputs are intended to feed two amplifier channel pairs (4 channels total).
• Front attenuation: trim each channel to match zone SPL targets and speaker sensitivity differences.
• Loop outputs: pass the incoming analog signal to another amplifier for system expansion (use short runs to minimize noise pickup).

Specs at a Glance

Connectivity & Control

• Analog Inputs: 2 × stereo RCA pairs (4-channel total feed)
• RCA Loop Outputs: 2 × stereo loop outputs for daisy-chaining
• Speaker Outputs: 4 channels of binding-post outputs
• Auto Power: signal sensing turn-on
• Trigger: 12V trigger IN/OUT (3.5 mm mono)
• Front Controls: per-channel input attenuation knobs
• Power: detachable IEC power cord

Installation Notes (What Dealers Need to Know)

• Two-zone planning: map each stereo input to a zone, then use front attenuation to balance room loudness and speaker efficiency.
• Signal-sense commissioning: verify the source/preamp output level is sufficient for reliable wake/sleep behavior.
• Trigger sequencing: use 12V trigger where deterministic automation is required; use trigger out to cascade additional amps.
• Loop-out hygiene: keep loop-out cables short and well-dressed; avoid running unbalanced analog alongside AC mains to reduce hum risk.
• Thermal strategy: provide rack ventilation and avoid blocking airflow paths for long-term reliability under sustained loads.

Finish Options

• Black
• Silver

Commercial & Logistics (No Dealer Pricing)

• MSRP: $1,499.00
• Warranty: 5 Years
• Status: Active

In the Box

• Rack ears
• Detachable IEC power cord

FAQ

• Is it rack-mountable? Yes — rack ears are included.
• Does it turn on automatically? Yes — signal-sensing auto power is supported.
• Does it support 12V trigger control? Yes — 12V trigger input and output are provided.
• Can I daisy-chain signal to another amp? Yes — stereo RCA loop outputs are included for expansion.
• Does it have level controls? Yes — per-channel front input attenuation controls support zone balancing.