Boulder 2150 – Stereophile – Product of the Year 2017

This 220-lb beast delivers 1000W into 8 ohms, and every one of those watts is claimed to be pure class-A, thanks to a microprocessor-based circuit that adjusts bias in accordance with input-signal voltage and loudspeaker load at any given millimoment. Yet for all that, said JA, "the Boulder 2150 runs relatively cool"—thanks in part to integral (non-fin) heatsinking created in Boulder's own machine shop. In a word, also courtesy JA: "extraordinary."

Link: Boulder 2110 – Stereophile – Product of the Year 2017

Boulder 2150 – The Absolute Sound – Golden Ear 2015

These two components are further demonstrations of just how good high-end electronics have now become—and of the fact that solid-state units can provide superb sound quality. They also illustrate the growing challenges of trying to describe sonic nuances that are far more matters of taste than of inherent merit.

Link: Boulder 2150 – The Absolute Sound – Golden Ear 2015

Boulder 2150 – Stereophile – Recommended Components 2020

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2020

Boulder 2150 – Stereophile – Recommended Components 2020

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2020

Boulder 2150 – Stereophile – Recommended Components 2019

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2019

Boulder 2150 – Stereophile – Recommended Components 2019

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2019

Boulder 2150 – Stereophile – Recommended Components 2018

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2018

Boulder 2150 – Stereophile – Recommended Components 2018

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2018

Boulder 2150 – Stereophile – Recommended Components 2017

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2017

Boulder 2150 – Stereophile – Recommended Components 2017

"It was about as tonally neutral a piece of electronics as I've heard here, neither warm nor cool." MF also praised the Boulder's "unrestricted microdynamic excursions" and its "well-controlled, ultra-solid, well-defined low-frequency response." Writing from his test bench, JA noted that the difficult-to-move Boulder "measured so well that it taxed the capabilities of my Audio Precision SYS2722."

Link: Boulder 2150 – Stereophile – Recommended Components 2017