Rotel RMB-1504 4-Channel CI Power Amplifier (70W x4) | RMB-1504
Rotel RMB-1504 4-Channel CI Power Amplifier (70W x4) | RMB-1504
Available to order — ships from incoming stock
Typically ships in 4–8 Business Days (Western Canada) · 2–5 Business Days (Eastern Canada)
SKU:RMB-1504
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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
| Category | Specification |
|---|---|
| Channels | 4 |
| Continuous Power Output | 70 W/ch (8 Ω, all channels driven) • 115 W/ch (4 Ω, all channels driven) |
| Amplifier Type | Class AB |
| THD (20 Hz–20 kHz) | < 0.03% |
| Frequency Response | 10 Hz–100 kHz (±1 dB) |
| S/N Ratio (IHF “A”) | 115 dB |
| Gain | 26 dB |
| Damping Factor | > 200 |
| Speaker Impedance | 4 Ω minimum |
| Power Consumption | 450 W |
| Standby Power | < 0.5 W (Signal Sense: 1 W) |
| BTU (4 Ω, 1/8 power) | 810 BTU/h |
| Dimensions (W×H×D) | 17.0 × 5.7 × 17.4 in (431 × 144 × 443 mm) |
| Front Panel Height | 3U / 5.25 in (132.6 mm) |
| Net Weight | 32.8 lb (14.9 kg) |
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
| Finish | Model | UPC | Ship Wt | Carton (L×W×H) |
|---|---|---|---|---|
| Black | RMB1504B | 672563132117 | 45 lb | 22 × 22 × 11 in |
| Silver | RMB1504S | 672563632112 | 45 lb | 22 × 22 × 11 in |
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.
