Kramer 900 Series Compact Stereo Power Amplifier - 10W, Balanced Input
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Kramer 900 Series Compact Stereo Power Amplifier
The Kramer 900 Series includes compact, high-efficiency Class‑D stereo amplifiers designed for speech reinforcement, multimedia audio, and AV system integration. Each model delivers stereo output with power levels ranging from 10 W to 40 W RMS per channel, supporting diverse input types and control options to suit classrooms, presentation spaces, and boardrooms.
Models vary in power output, control features, and form factor compatibility. The 900N and 900xl are optimized for lighter loads and unbalanced sources, while the 907 and 907XL offer higher power with balanced audio support and DIP-switch gain control. All models support Kramer Tools or MultiTOOLS rack-mounting formats, making them versatile for both standalone and integrated installations.
Key Features
- Amplifier Type: Class‑D stereo amplifier
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Power Output:
- 900N / 900xl: 10 W RMS per channel (4 Ω), music peak up to 35–40 W
- 907 / 907XL: 40 W RMS per channel (8 Ω), peak up to 150 W
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Inputs:
- 900N: Balanced (5‑pin terminal block), unbalanced RCA
- 900xl: Unbalanced RCA and 3.5 mm jack
- 907 / 907XL: Balanced stereo via terminal block
- Outputs: Stereo speaker output via 4‑pin terminal block
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Controls:
- 900N: Volume knob, power LED
- 900xl: Volume & input select buttons, RS‑232
- 907 / 907XL: Volume knob, mute button, DIP-switch gain, LEDs
- Gain Control: DIP-switch (907/907XL); front-panel or button control (others)
- Protection: Overheat/mute indication, compression threshold control
- Mounting: Tools or MultiTOOLS rack-compatible (3 or 4 per 1U)
Technical Specifications
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Bandwidth:
- 900N: 24 kHz (-3 dB)
- 900xl: 25 kHz
- 907: 20 kHz (-3 dB)
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Signal-to-Noise Ratio:
- 900N: 55 dB
- 900xl: 85 dB
- 907: 60.2 dB
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THD + Noise:
- 900N: 0.5%
- 900xl: 0.6%
- 907: 1.9%
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2nd Harmonic Distortion:
- 900N: 0.04%
- 900xl: 0.35%
- 907: 0.3%
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Power Supply:
- 900N: 12 V DC, 2.1 A
- 900xl: 12 V DC, 2.0 A
- 907 / 907XL: 24 V DC, 5 A
- Operating Temp (900xl): 0 °C to 40 °C
- Storage Temp (900xl): -45 °C to +72 °C
- Humidity (900xl): 10–90% non-condensing
What's Included
- Amplifier unit (900N, 900xl, 907, or 907XL)
- Power adapter (12 V or 24 V depending on model)
- Optional rack-mount bracket (RK-3T or RK-1)
Kramer 900N Compact Stereo Power Amplifier
The Kramer 900N is a compact, high-efficiency Class D stereo amplifier delivering 10 W RMS per channel into 4 Ω loads, or 35 W peak music power. Designed to support balanced or unbalanced audio inputs, it’s ideal for speech or background music applications in presentation rooms, classrooms, or multimedia installations.
Featuring a volume knob, power LED indicator, and protection against overload, the 900N fits three units in one rack space using Kramer’s Tools form factor. It includes a 12 V DC plug-in power supply for simple field power setups.
Key Features
- Power Output: 10 W RMS per channel into 4 Ω (35 W peak music power)
- Audio Inputs: Balanced (5‑pin terminal block) or unbalanced (RCA)
- Speaker Output: Stereo via 4‑pin terminal block
- Efficiency: Class D operation
- Controls: Front-panel volume knob, On LED indicator
- Signal-to-Noise Ratio: 55 dB
- Bandwidth: 24 kHz (‑3 dB)
- Total Harmonic Distortion + Noise: 0.5 % @1 kHz
- 2nd Harmonic Distortion: 0.04 % @1 kHz
- Coupling: AC input, DC speaker output
- Form Factor: Compact Tools enclosure, 1 U rack-compatible (3 side-by-side)
- Protection: Volume compression threshold control
Technical Specifications
- Inputs: 1× balanced (5‑pin terminal block), 1× unbalanced (RCA)
- Output: 2× 4 Ω speaker channels via 4‑pin terminal block
- Output Power: 10 W RMS ×2 into 4 Ω; 35 W RMS music power
- Bandwidth (-3 dB): Up to 24 kHz
- S/N Ratio: 55 dB
- THD + Noise: 0.5 % @1 kHz
- 2nd Harmonic: 0.04 % @1 kHz
- Gain Control: -40 dB to +19 dB until compression
- Power Supply: 12 V DC, 2.1 A adapter
- Form Factor: Tools enclosure (12 × 7.5 × 2.5 cm)
- Weight: 0.66 lb (0.30 kg)
- Shipping: 1.3 lb; 9.13″ × 5.35″ × 3.94″ box
What's Included
- 900N amplifier unit
- 12 V DC power adapter
- Rack-mount bracket (Tools adapter)
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