ANTHEM STR Power Amplifier

$7,499.00 / Each

  • 400W/600W/800W into 8/4/2 ohms
  • Cascoded complementary feedback input stage
  • Sixteen bipolar output devices per channel
  • Dual Mono Design
  • Massive toroidal transformers
  • Soft turn-on
  • Four power on/off options
  • No rail fuses
  • Advanced Load Monitoring™ Technology
  • Graphic front panel display for the power meter, status, and easy setup navigation
  • Available in Silver and Black Finishes
  • Crafted in Canada

In Store Only - Please contact us to check in-store availability.

Check Local Availability

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.

Cascoded Complementary Feedback Input Stage

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.

Sixteen Bipolar Output Devices Per Channel

Anthem engineers incorporated sixteen bipolar output devices per channel, resulting in peak production that is effortless and instantaneous, cinching even the most challenging material. The use of multiple bipolar output devices in class AB configuration also dramatically reduces distortion while ensuring extreme linearity, extensive bandwidth, and stress-free reliability.

Experience the immense dynamics of up to 800 clean watts delivered into demanding 2-ohm loads, or 400W into 8 ohms/600W into 4 ohms continuously and with both channels driven.

Conservatively rated, in a low-profile design shaped to minimize hum, the low-impedance toroidal power transformers — one for each channel — make no sacrifices when it comes to delivering a continuous supply of pure, clean, low noise power. As well, both the power supply impedance and internal cabling inductance are minimized to deliver a clear path for maximum power.

The amplifier channels are thus able to deliver stable, continuous power at maximum output without affecting one another, even when driving the lowest impedances. While some amplifiers oscillate or run out of power when driving lower impedance loads, the STR Power Amplifier remains perfectly stable under all conditions.


Input Impedance 100 Ω (MC), 47 kΩ || 270 pF (MM)
RIAA Response (20 Hz to 20 kHz) ± 0.1 dB
Gain (1 kHz, volume set to 0 dB) 61 dB (MC), 41 dB (MM)
DSP Mode
Maximum Input (at 1 kHz for < 0,01% THD 20 Hz - 20 kHz) 3.6 mV (MC), 38 mV (MM)
THD+N (at 1 kHz 20 Hz - 20 kHz BW, 2 Vrms output) < 0.02% (MC), < 0.003% (MM)
THD (at 1 kHz 20 Hz - 20 kHz BW, 2 Vrms output) 0.002% (MC), < 0.0015% (MM)
SNR (IEC-A, 2 Vrms output) 84 dB (MC), 102 dB (MM)
Direct Mode
Maximum Input Direct Mode (at 1 kHz for < 0,01% THD 20 Hz - 20 kHz) 11.8 mV (MC), 129 mV (MM)
THD+N (at 1 kHz 20 Hz - 20 kHz BW, 2 Vrms output) < 0.008% (MC), < 0.003% (MM)
THD (at 1 kHz 20 Hz - 20 kHz BW, 2 Vrms output) 0.002% (MC), < 0.0015% (MM)
SNR (IEC-A, 2 Vrms output) 92 dB (MC), 110 dB (MM)
Frequency Response
digital-in, 192 kHz 10 Hz - 50 kHz (+0.00, -0.50 dB)
digital-in, 96 kHz 10 Hz - 45 kHz (+0.00, -0.50 dB)
digital-in, 44.1 kHz 10 Hz - 20 kHz (+0.00)
analog-in, DSP mode 10 Hz - 40 kHz (+0.02, -0.20 dB)
analog-in, direct mode 10 Hz - 80 kHz (+0.00, -0.10 dB)
THD+N (at 1 kHz, 20 Hz - 20 kHz BW, 2 Vrms output)
DSP Mode 0.001% Digital in, 0.0016% Analog in
Analog Direct Mode 0.00%
SNR (at 1 kHz, IEC-A, 2 Vrms output)
DSP Mode 113 dB (digital-in), 108 dB (analog-in)
Analog Direct Mode 120 dB
Maximum Output ( <0.1% THD )
RCA connectors (direct and DSP modes) 3.3 Vrms
XLR connectors (direct and DSP modes) 6.6 Vrms
XLR Configuration Pin 1: Ground, Pin 2: Normal, Pin 3: Inverted
This product operates from a single phase AC power source that supplies between 90V and 264V at a frequency of 50 or 60 Hz.
Standby 0.38 W (120V), 0.45 W (240V)
Standby + Network 1.1 W (120V), 1.2 W (240V)
Typical Use 10 W
Height 3-8/9” (9.93 cm)
Width 17” (43.2 cm)
Depth (not including power cord) 14-5/6” (37.69 cm)
Weight (unpacked) 16.8 lb (7.6 kg)

Additional information



There are no reviews yet.

Be the first to review “ANTHEM STR Power Amplifier”