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STR Power Amplifier delivers 400 Watts/channel into 8 ohms with both channels driven, a massive 600 Watts/channel into 4 ohms (both channels driven) and 800W in 2 ohms, for true no-holds-barred performance.
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The STR Power Amplifier is the beating heart of a world-class 2-channel sound system. It delivers massive power generation, with audiophile-quality output in a smartly designed component.
Designed, engineered, and Crafted in Canada, the STR Power Amplifier delivers 400 Watts/channel into 8 ohms with both channels driven, a massive 600 Watts/channel into 4 ohms (both channels driven) and 800W in 2 ohms, for true no-holds-barred performance.
Inside, the STR Power Amplifier uses two colossal transformers and multiple high-current output devices so the most subtle details and dynamic peaks are handled equally well. Outside, its beautifully designed cosmetics, including a 7-inch graphic control display and secure, highly conductive audiophile connectors provide a perfect match to the STR Preamplifier.
STR Preamplifier pictured with STR Power Amplifier (sold separately). Both models available in black or silver finishes.
Massive Power.The STR Power Amplifier benefits from our proprietary input topology—a unique departure from the classic differential input stage. Eight low-noise bipolar input devices are configured in a complementary active-load cascoded feedback arrangement for reduced distortion, exceptionally linear response and superior bandwidth. Transistors in critical stages are hand-selected and matched for lowest possible distortion.
A sequence-controlled soft turn-on significantly reduces power line transients and in-rush current during start up, thereby preventing accidental tripping of circuit breakers.
The amplifier sections are Direct Connected to the power supply capacitor bank. This keeps output impedance remarkably low while making more power available to the amplifier. Even when driving lower or complex impedance loads, the result is audibly superior performance.
In addition to the traditional options for power-on, the STR Power Amplifier allows trigger mode and audio signal sensing to be combined so you would never need to think about turning the amplifier on or off manually. This can be useful when using a preamp with Home Theater Bypass mode together with a surround sound processor in the same system.
The STR Power Amplifier is designed, engineered and manufactured in Canada and is part of premium STR Series by Anthem, the leader in audio power and control.
The STR Power Amplifier delivers incredible dynamics thanks to a massive, conservatively rated (and “audiophile approved”) power supply, designed with high rail voltages. The advanced-generation toroidal power transformers minimize stray magnetic field radiation and ensure ultra-quiet performance. The resulting power is pure, clean, low-noise; capable of effortlessly and instantly reproducing the full dynamics of even the most complex audio recordings.
Anthem STR Power Amplifiers are designed, engineered, and Crafted in Canada. From the idea stage to the final manufacturing specs, we have complete control over the whole intricate process. We take pride in this personal attention to detail, and use only the highest quality components, many designed and engineered in-house, in each new STR Power Amplifier we hand-build for your enjoyment.
Big power demands big connections, and our custom-designed oversized five-way binding posts give you the flexibility you need for even large-gauge bare-wire connections. Insulated, non-conductive, color-coded jackets make easy, fast, and solid connections with no interference or ghosting.
Anthem amplifiers go where other amplifiers fear to tread, with a well-earned reputation for being incredibly stable under difficult, low-impedance speaker loads. Short path design and redundant systems (with Advanced Load Monitoring and other exclusive protective technologies) ensure that peaks are surmounted effortlessly, guaranteeing a long life of high performance.
| POWER AMPLIFIER | ||||||||||
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| * Maximum 3 seconds due to high current draw. | ||||||||||
| THD (400 W) | 0.0007% (1 kHz), 0.004% (20 kHz) | |||||||||
| IMD (300 W) | ||||||||||
| ITU-R (19 kHz + 20 kHz) | 0.0006% | |||||||||
| SMPTE (60 Hz + 7 kHz) | 0.0016% | |||||||||
| SNR (IEC-A, ref. 400 W) | 121 dB | |||||||||
| Frequency Response (20 Hz - 20 kHz) | ± 0.1 dB | |||||||||
| Power Bandwidth (-3 dB at 400 W into 8 ohms) | 91 kHz | |||||||||
| Slew Rate | 30 V/μs | |||||||||
| Damping Factor (20 Hz - 1 kHz) | 360 | |||||||||
| Channel Separation | 101 dB (100 Hz), 98 dB (10 kHz) | |||||||||
| Input Impedance | 10kΩ (RCA), 15kΩ (XLR) | |||||||||
| Input Sensitivity (for 400W into 8Ω) | 2.1 Vrms | |||||||||
| Voltage Gain | 29 dB | |||||||||
| POWER REQUIREMENT | ||||||||||
| 120 V version: | In countries where the line voltage is 120 V, this product operates from a single phase AC power source that supplies between 108 V and 132 V at a frequency of 60 Hz. | |||||||||
| 220-240 V version: | In countries where the line voltage is 220, 230, or 240 V, this product operates from a single phase AC power source that supplies between 198 V and 264 V at a frequency of 50 Hz. | |||||||||
| POWER CONSUMPTION | ||||||||||
| Standby | 310 mW | |||||||||
| Idle | 65 W | |||||||||
| Typical Playback Levels | 150 W - 300 W | |||||||||
| High Playback Levels | 600 W - 1100 W | |||||||||
| DIMENSIONS | ||||||||||
| Height | 6-3/4” (17.2 cm) | |||||||||
| Width | 17” (43.2 cm) | |||||||||
| Depth (not including power cord) | 18-1/2” (47 cm) | |||||||||
| Weight (unpacked) | 60 lb (27.3 kg) | |||||||||
