COPPER

A PS Audio Publication

Issue 17 • Free Online Magazine

Issue 17 MY TURN

Boulder Amplifiers

Boulder Amplifiers

Somewhere back in the last century, from around 1976 to 1983, a California company called Pacific Recorders & Engineering (PR&E) designed and built tape cartridge machines for radio stations. One PR&E model, the Tomcat (an acronym for Theory Optimized Microprocessor Controlled Audio Transport, if you can believe that), was said to be more durable and have better  S/N and better sound quality than anything else on the market. Cart machines were used for easy playback of commercial spots, as well as for music.

PR&E branched out into amplifiers, microphone preamps and mixing boards for broadcast and recording applications, and their reputation for high performance and durability spread. Occasionally, audiophiles would stumble upon a PR&E amp, and again, the company’s reputation spread.

As have zillions of Californians before him and since, company head Jeff Nelson relocated to Colorado in 1984. The company was housed in an old farmhouse in Superior, south of Boulder, Colorado, and the company was renamed Boulder Amplifiers.

Soon thereafter, the company’s focus shifted from pro gear to high-performance consumer products. A pro-model amp, the 500, featured the standard pro-style indicators and controls on its front panel. The 500 AE–”Audiophile Edition”—deleted the gewgaws and had only a power switch.

For over 30 years now, Boulder  has designed and built indestructible amps, preamps, and other components. Products feature impressive, heavily-machined casework that is all done in-house, a rarity these days. The impression given by their products is a sense of being built for maximum performance and durability with cost no object.

The company’s new, purpose-built  23,000 square foot facility in Louisville, Colorado will allow the company to pursue even bigger/better/badder projects. It’ll be interesting to see what they come up with!

Special thanks to Rich Maez for the tour.

IMG_9470
Boulder Amplifier's new facilities
IMG_9471
CNC milling machines used to build Boulder Amplifier chassis
IMG_9476
Rich Maez, Director of Sales and Marketing, shows some finished metalwork
IMG_9478
Finished amplifier heat sinks
IMG_9482
The oversized bead-blast chamber where metalwork receives a satin finish
IMG_9486
Assembly area
IMG_9489
Massive 3060 amp on the engine stand used for moving the largest models
IMG_9490
Inside the 3060
IMG_9493
Other amplifiers awaiting final assembly and test
IMG_9495
Auto insertion pick and place component machine for PCB assembly
IMG_9496
Wave solder machine to solder PC boards

More from Issue 17

View All Articles in Issue 17

Search Copper Magazine

#227 Seth Lewis Gets in the Groove With Take a Look Around: a Tribute to the Meters by Frank Doris Feb 02, 2026 #227 Passport to Sound: May Anwar’s Audio Learning Experience for Young People by Frank Doris Feb 02, 2026 #227 Conjectures on Cosmic Consciousness by B. Jan Montana Feb 02, 2026 #227 The Big Takeover Turns 45 by Wayne Robins Feb 02, 2026 #227 Music and Chocolate: On the Sensory Connection by Joe Caplan Feb 02, 2026 #227 Singer/Songwriter Chris Berardo: Getting Wilder All the Time by Ray Chelstowski Feb 02, 2026 #227 The Earliest Stars of Country Music, Part One by Jeff Weiner Feb 02, 2026 #227 The Vinyl Beat Goes Down to Tijuana (By Way of Los Angeles), Part Two by Rudy Radelic Feb 02, 2026 #227 How to Play in a Rock Band, 20: On the Road With Blood, Sweat & Tears’ Guitarist Gabe Cummins by Frank Doris Feb 02, 2026 #227 From The Audiophile’s Guide: Audio Specs and Measuring by Paul McGowan Feb 02, 2026 #227 Our Brain is Always Listening by Peter Trübner Feb 02, 2026 #227 PS Audio in the News by PS Audio Staff Feb 02, 2026 #227 The Listening Chair: Sleek Style and Sound From the Luxman L3 by Howard Kneller Feb 02, 2026 #227 The Los Angeles and Orange County Audio Society Celebrates Its 32nd Anniversary, Honoring David and Sheryl Lee Wilson and Bernie Grundman by Harris Fogel Feb 02, 2026 #227 Back to My Reel-to-Reel Roots, Part 26: Half Full – Not Half Empty, Redux by Ken Kessler Feb 02, 2026 #227 That's What Puzzles Us... by Frank Doris Feb 02, 2026 #227 Record-Breaking by Peter Xeni Feb 02, 2026 #227 The Long and Winding Road by B. Jan Montana Feb 02, 2026 #226 JJ Murphy’s Sleep Paralysis is a Genre-Bending Musical Journey Through Jazz, Fusion and More by Frank Doris Jan 05, 2026 #226 Stewardship by Consent by B. Jan Montana Jan 05, 2026 #226 Food, Music, and Sensory Experience: An Interview With Professor Jonathan Zearfoss of the Culinary Institute of America by Joe Caplan Jan 05, 2026 #226 Studio Confidential: A Who’s Who of Recording Engineers Tell Their Stories by Frank Doris Jan 05, 2026 #226 Pilot Radio is Reborn, 50 Years Later: Talking With CEO Barak Epstein by Frank Doris Jan 05, 2026 #226 The Vinyl Beat Goes Down to Tijuana (By Way of Los Angeles), Part One by Rudy Radelic Jan 05, 2026 #226 Capital Audiofest 2025: Must-See Stereo, Part Two by Frank Doris Jan 05, 2026 #226 My Morning Jacket’s Carl Broemel and Tyler Ramsey Collaborate on Their Acoustic Guitar Album, Celestun by Ray Chelstowski Jan 05, 2026 #226 The People Who Make Audio Happen: CanJam SoCal 2025, Part Two by Harris Fogel Jan 05, 2026 #226 How to Play in a Rock Band, 19: Touring Can Make You Crazy, Part One by Frank Doris Jan 05, 2026 #226 Linda Ronstadt Goes Bigger by Wayne Robins Jan 05, 2026 #226 From The Audiophile’s Guide: Active Room Correction and Digital Signal Processing by Paul McGowan Jan 05, 2026 #226 PS Audio in the News by Frank Doris Jan 05, 2026 #226 Back to My Reel-to-Reel Roots, Part 25: Half-Full, Not Empty by Ken Kessler Jan 05, 2026 #226 Happy New Year! by Frank Doris Jan 05, 2026 #226 Turn It Down! by Peter Xeni Jan 05, 2026 #226 Ghost Riders by James Schrimpf Jan 05, 2026 #226 A Factory Tour of Audio Manufacturer German Physiks by Markus "Marsu" Manthey Jan 04, 2026 #225 Capital Audiofest 2025: Must-See Stereo, Part One by Frank Doris Dec 01, 2025 #225 Otis Taylor and the Electrics Delivers a Powerful Set of Hypnotic Modern Blues by Frank Doris Dec 01, 2025 #225 A Christmas Miracle by B. Jan Montana Dec 01, 2025 #225 T.H.E. Show New York 2025, Part Two: Plenty to See, Hear, and Enjoy by Frank Doris Dec 01, 2025 #225 Underappreciated Artists, Part One: Martin Briley by Rich Isaacs Dec 01, 2025 #225 Rock and Roll is Here to Stay by Wayne Robins Dec 01, 2025 #225 A Lifetime of Holiday Record (and CD) Listening by Rudy Radelic Dec 01, 2025 #225 Little Feat: Not Saying Goodbye, Not Yet by Ray Chelstowski Dec 01, 2025 #225 How to Play in a Rock Band, Part 18: Dealing With Burnout by Frank Doris Dec 01, 2025 #225 The People Who Make Audio Happen: CanJam SoCal 2025 by Harris Fogel Dec 01, 2025 #225 Chicago’s Sonic Sanctuaries: Four Hi‑Fi Listening Bars Channeling the Jazz‑Kissa Spirit by Olivier Meunier-Plante Dec 01, 2025

Boulder Amplifiers

Boulder Amplifiers

Somewhere back in the last century, from around 1976 to 1983, a California company called Pacific Recorders & Engineering (PR&E) designed and built tape cartridge machines for radio stations. One PR&E model, the Tomcat (an acronym for Theory Optimized Microprocessor Controlled Audio Transport, if you can believe that), was said to be more durable and have better  S/N and better sound quality than anything else on the market. Cart machines were used for easy playback of commercial spots, as well as for music.

PR&E branched out into amplifiers, microphone preamps and mixing boards for broadcast and recording applications, and their reputation for high performance and durability spread. Occasionally, audiophiles would stumble upon a PR&E amp, and again, the company’s reputation spread.

As have zillions of Californians before him and since, company head Jeff Nelson relocated to Colorado in 1984. The company was housed in an old farmhouse in Superior, south of Boulder, Colorado, and the company was renamed Boulder Amplifiers.

Soon thereafter, the company’s focus shifted from pro gear to high-performance consumer products. A pro-model amp, the 500, featured the standard pro-style indicators and controls on its front panel. The 500 AE–”Audiophile Edition”—deleted the gewgaws and had only a power switch.

For over 30 years now, Boulder  has designed and built indestructible amps, preamps, and other components. Products feature impressive, heavily-machined casework that is all done in-house, a rarity these days. The impression given by their products is a sense of being built for maximum performance and durability with cost no object.

The company’s new, purpose-built  23,000 square foot facility in Louisville, Colorado will allow the company to pursue even bigger/better/badder projects. It’ll be interesting to see what they come up with!

Special thanks to Rich Maez for the tour.

IMG_9470
Boulder Amplifier's new facilities
IMG_9471
CNC milling machines used to build Boulder Amplifier chassis
IMG_9476
Rich Maez, Director of Sales and Marketing, shows some finished metalwork
IMG_9478
Finished amplifier heat sinks
IMG_9482
The oversized bead-blast chamber where metalwork receives a satin finish
IMG_9486
Assembly area
IMG_9489
Massive 3060 amp on the engine stand used for moving the largest models
IMG_9490
Inside the 3060
IMG_9493
Other amplifiers awaiting final assembly and test
IMG_9495
Auto insertion pick and place component machine for PCB assembly
IMG_9496
Wave solder machine to solder PC boards

0 comments

Leave a comment

0 Comments

Your avatar

Loading comments...

🗑️ Delete Comment

Enter moderator password to delete this comment:

✏️ Edit Comment

Enter your email to verify ownership: