At the core of the A1.5 is a power supply and output stage architecture designed to deliver both speed and authority. Its foundation is a massive, low‑noise linear power supply, anchored by a high‑current transformer and substantial reservoir capacitance identical in type and design to that of our M1.1 Power Amplifier. The proprietary power supply capacitors used in the A1.5—and in all CH Precision amplifiers—are custom‑engineered to support a topology that demands extreme time‑domain accuracy, ensuring instantaneous current delivery without smearing or compression. This robust energy storage allows the A1.5 to maintain composure and control through the most demanding musical passages, while careful mechanical grounding and ultra‑short, optimized internal paths minimize noise intrusion and vibration, preserving signal integrity from input to output.

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The fully discrete, complementary output stage reflects CH Precision’s commitment to wide‑bandwidth, high‑slew‑rate performance. Operated in Class AB for efficiency yet biased for exceptional linearity, it achieves high current drive with minimal distortion and a vanishingly low noise floor. Unlike amplifiers that rely purely on transformer mass for authority, the A1.5’s design delivers explosive current on demand while retaining the agility and finesse required for delicate musical textures. Combined with precise regulation and a fast, inherently stable topology, the A1.5 renders music with effortless dynamic expression, micro‑level detail, and an unmistakable sense of grip and authority.  This is not power for its own sake—it is power in the service of music, ensuring that transients are rendered with lifelike immediacy while sustained notes bloom with texture and harmonic richness. 

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CH Precision’s adjustable feedback system allows listeners to fine‑tune the ratio of localto global feedback from 0% to 100% in six steps (0, 10, 20, 40, 70, 100%), directly shaping the amplifier’s damping factor—a key variable in matching the amplifier to both loudspeakers and room acoustics. By adjusting damping, you can influence low‑frequency response, transient behavior, and overall system voicing for optimal synergy. In stereo mode, feedback and input sensitivity remain identical for the left and right channels. In monobloc or bi‑amp configurations, the channels can be adjusted independently, allowing precise tuning and differential damping—for example, applying different settings to a passive subwoofer and a main loudspeaker for ideal balance and control.