OSD Black SAM300 300W Class-A/B Toroidal Mono Subwoofer Amplifier
The OSD Black SAM300 300W Class-A/B Toroidal Mono Subwoofer Amplifier is an audiophile-grade high-current linear bass amplifier engineered for critical music listening and high-performance architectural home theater systems. Featuring a massive custom toroidal power transformer and discrete Class-A/B output transistors, the SAM300 delivers 300 watts RMS into 4 ohms (180 watts RMS into 8 ohms) with ultra-fast transient speed, rich musical low-end texture, variable crossover (40Hz to 180Hz), and heavy-duty 2U rack-mount construction.
If you want to know what makes a Class-A/B toroidal subwoofer amplifier superior for acoustic music and articulate bass depth, how a linear high-current power supply handles rapid dynamic bursts without compression, or how variable phase and crossover controls integrate in-wall subwoofers with reference floorstanding or in-ceiling speakers, the OSD Black SAM300 delivers unmatched audiophile performance. Discerning home theater enthusiasts choose the SAM300 for its musical warmth and relentless bass control.
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Audiophile Class-A/B Linear Topology with Toroidal Transformer
Unlike digital switching amplifiers, the SAM300 utilizes an ultra-quiet, massive toroidal power transformer and high-current discrete bipolar output transistors, delivering clean, musical low frequencies with zero digital switching noise.
Effortless 300W Low-Frequency Current Reserves
Delivering 300W RMS into 4-ohm loads with massive capacitance storage, the SAM300 handles demanding cinema explosions and dynamic bass transients effortlessly, providing authoritative control over passive in-wall subwoofer voice coils.
Precision Crossover & Variable Phase Alignment
Equipped with a continuously adjustable 40Hz to 180Hz low-pass crossover and a 0-to-180 degree phase toggle, allowing perfect time alignment and frequency integration between your architectural subwoofers and main speakers.
Heavy-Duty Aluminum 2U Rack-Mount Chassis
Built with a brushed aluminum front faceplate, heavy-duty internal heat sinks for convective cooling, gold-plated RCA inputs with pass-through outputs, and auto-sensing signal detection for automated system operation.
Specifications
| Amplifier Type | Audiophile Class-A/B Linear Mono Subwoofer Power Amplifier |
| Power Transformer | Massive Custom Toroidal Power Supply |
| Power Output (4 Ohms) | 300 Watts RMS (Continuous Low-Frequency Power) |
| Power Output (8 Ohms) | 180 Watts RMS (Continuous Low-Frequency Power) |
| Frequency Response | 20Hz - 180Hz (+/- 1dB) |
| Variable Low-Pass Crossover | 40Hz - 180Hz (18dB/Octave Continuously Variable) |
| Phase Switch | 0 Degrees / 180 Degrees Selectable |
| Signal-to-Noise Ratio | >98dB A-Weighted |
| Total Harmonic Distortion | <0.03% at Rated Power |
| Inputs | Stereo/Mono Gold-Plated RCA Line In, High-Level Speaker Binding Posts |
| Outputs | RCA Line Pass-Through, High-Current 5-Way Subwoofer Binding Posts |
| Auto Power Sensing | Signal-Sensing Auto-On / Off / Standby Switch |
| Rack Mounting | Includes Heavy-Duty 19-Inch 2U Rack Mount Ears |
| Dimensions (W x D x H) | 17.0 x 12.5 x 3.5 Inches (432 x 318 x 89 mm) |
| Unit Weight | 19.5 lbs (8.8 kg) |
In The Box Contents
- 1x OSD Black SAM300 300W Class-A/B Toroidal Mono Subwoofer Amplifier
- 1x Pair 19-Inch Heavy-Duty 2U Rack Mount Ears with Mounting Screws
- 1x Heavy-Duty Detachable AC Power Cable
- 1x Detailed Owner's Manual and In-Wall Subwoofer Calibration Guide
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