.bh-wrap, .bh-wrap *, .bh-wrap *::before, .bh-wrap *::after{ box-sizing:border-box; } .bh-wrap{ width:100%; max-width:1100px; margin:0 auto; padding:1rem 1.25rem; line-height:1.6; } .bh-eyebrow{ display:block; margin:0; letter-spacing:.08em; text-transform:uppercase; font-size:.8rem; opacity:.7; } .bh-title{ margin:.25rem 0 1rem; font-size:2.75rem; font-weight:700; line-height:1.2; overflow-wrap:normal; word-break:normal; } .bh-intro{ margin:0 0 1.25rem; font-style:italic; } .bh-grid{ display:grid; grid-template-columns:minmax(0,1fr); gap:2rem; width:100%; max-width:100%; } .bh-main, .bh-side{ display:block; width:100%; min-width:0; max-width:100%; margin:0; padding:0; float:none; } @media(min-width:900px){ .bh-grid{ grid-template-columns:minmax(0,16fr) minmax(0,9fr); gap:2rem; align-items:start; } } .bh-section{ width:100%; max-width:100%; margin:2rem 0; } .bh-section h2{ margin:0 0 1rem; line-height:1.3; overflow-wrap:normal; word-break:normal; hyphens:none; } .bh-section p, .bh-section li{ overflow-wrap:break-word; word-break:normal; } .bh-bullets{ margin:.5rem 0 0; padding-left:1.25rem; list-style:disc; } .bh-bullets li{ margin-bottom:.45rem; } /* Scroll-free specification grid */ .bh-specs{ display:block; width:100%; min-width:0; max-width:100%; margin:0; border-top:1px solid #e5e7eb; border-left:1px solid #e5e7eb; overflow:visible; } .bh-spec-row{ display:grid; grid-template-columns:minmax(0,42%) minmax(0,58%); width:100%; min-width:0; } .bh-spec-label, .bh-spec-value{ min-width:0; padding:.58rem; border-right:1px solid #e5e7eb; border-bottom:1px solid #e5e7eb; font-size:.86rem; line-height:1.4; white-space:normal; overflow-wrap:anywhere; word-break:normal; } .bh-spec-label{ background:#f8fafc; font-weight:600; } .bh-faq details{ margin:.5rem 0; padding:.75rem 1rem; border:1px solid #e5e7eb; border-radius:.5rem; background:#fafafa; } .bh-faq summary{ font-weight:600; cursor:pointer; } @media(max-width:899px){ .bh-wrap{ padding:.75rem 1rem; } .bh-title{ font-size:2.1rem; } .bh-grid{ gap:.5rem; } } @media(max-width:480px){ .bh-title{ font-size:1.8rem; } .bh-spec-row{ grid-template-columns:minmax(0,40%) minmax(0,60%); } .bh-spec-label, .bh-spec-value{ padding:.48rem; font-size:.8rem; } } Anthem Anthem STR Power Amplifier Flagship Stereo Class-AB Power Amplifier • 400W/Ch into 8Ω • 600W/Ch into 4Ω • Up to 800W/Ch into 2Ω • True Dual-Mono Design • 16 Bipolar Output Devices Per Channel • Made in Canada Flagship Dual-Mono Stereo Amplification with 400 Watts Per Channel The Anthem STR Power Amplifier is a reference-level two-channel amplifier engineered to provide tremendous power, low distortion and authoritative control for demanding high-end loudspeakers. Delivering 400 watts per channel into 8 ohms and 600 watts per channel into 4 ohms with both channels driven, plus up to 800 watts per channel into 2 ohms, the STR offers the headroom required to reproduce everything from delicate musical detail to explosive dynamic peaks with exceptional composure. At the heart of the STR is a true dual-mono Class-AB architecture featuring two independently wound toroidal transformers and sixteen bipolar output devices per channel. Anthem combines this formidable power supply with a cascoded complementary-feedback input stage, Advanced Load Monitoring, direct-connected output stages without rail fuses and sequence-controlled soft turn-on, creating a stereo amplifier designed for uncompromising high-performance music systems. Highlights & Benefits 400W Per Channel into 8 Ohms — Delivers massive continuous stereo power, increasing to 600 watts per channel into 4 ohms and up to 800 watts per channel into 2 ohms. True Dual-Mono Architecture — Two independently wound toroidal transformers provide dedicated power supplies for the left and right amplifier channels, improving separation and minimizing interaction between channels. 16 Bipolar Output Devices Per Channel — Thirty-two high-current output devices provide the reserves needed to confidently control demanding loudspeakers and reproduce powerful transient peaks. Advanced Load Monitoring — Anthem's proprietary ALM technology continuously monitors operating conditions and intervenes only when necessary to protect the amplifier and loudspeakers. Balanced & Unbalanced Connectivity — XLR and RCA inputs allow straightforward integration with the Anthem STR Preamplifier and a wide range of high-performance stereo preamplifiers. Technology & Design Dual-Mono Power Supplies — Each amplifier channel is powered by its own independently wound toroidal transformer, helping the STR maintain channel separation and consistent power delivery when both loudspeakers demand substantial current simultaneously. Cascoded Complementary-Feedback Input Stage — Anthem uses eight low-noise bipolar input devices in a complementary active-load cascoded-feedback configuration. Critical transistors are hand-selected and matched to minimize distortion while maintaining excellent linearity and bandwidth. Direct-Connected Output Architecture — The amplifier sections connect directly to the power-supply capacitor bank without conventional rail fuses, helping reduce output impedance and making stored power immediately available during demanding musical transients. Soft Turn-On & Intelligent Power Control — A sequence-controlled startup manages inrush current, while trigger and audio-signal sensing provide flexible automatic power control for dedicated stereo and integrated home theater installations. FAQ — Anthem STR Power Amplifier How much power does the Anthem STR Power Amplifier produce? The STR delivers 400 watts per channel into 8 ohms and 600 watts per channel into 4 ohms with both channels driven. Anthem also rates the amplifier for up to 800 watts per channel into 2 ohms, with the 2-ohm maximum specified for up to three seconds because of the exceptionally high current draw. Is the Anthem STR Power Amplifier a dual-mono design? Yes. The STR uses a true dual-mono architecture with independently wound toroidal transformers for the two amplifier channels, providing each channel with a dedicated high-current power source. Does the STR Power Amplifier include ARC Genesis? No. ARC Genesis is not built into the power amplifier itself. Pairing it with the Anthem STR Preamplifier provides ARC Genesis room correction, advanced bass management, DAC functionality and system control. What preamplifier pairs best with the STR Power Amplifier? The Anthem STR Preamplifier is its natural companion, with matching cosmetics and system architecture. The STR Power Amplifier can also be used with other high-quality stereo preamplifiers and compatible A/V processors through its balanced XLR or unbalanced RCA inputs. Why Buy From Us Authorized Anthem Dealer 5% Reward Points on Every Purchase Expert Amplifier and Loudspeaker System-Matching Assistance Professional Two-Channel System Setup and Installation Available Related Products & Accessories Anthem STR Stereo Pre-Amplifier with Built-in DAC and Room Correction Anthem STR Integrated Amplifier Anthem Statement P2 Class-AB Stereo Power Amplifier Anthem Statement M1 Mono Amplifier Anthem STR Power Amplifier Specifications Product Type Flagship stereo power amplifier Series Anthem STR Series Amplifier Channels 2 Amplifier Architecture Class-AB, true dual-mono Output Power — 8Ω 400W per channel Output Power — 4Ω 600W per channel Output Power — 2Ω 800W per channel* 2Ω Rating Note Maximum 3 seconds due to high current draw Rated Power Conditions Continuous, 20Hz–20kHz,
