Stay Connected
- YouTube
- Facebook
- X
- LinkedIn
- Pinterest
- Instagram
About Us
Advertise
Contact Us
Subscribe
- Newsletter Sign Up
Press
The Vault

Search

Home
Reviews
Features
Technical
- Technical Reviews
- Primers
Editorial
- Editor’s Desk
- OpEd
Blogs
- Blogs & Little Things
- JJ Thoughts
OpEd
AV Directory
Recommended Gear

ADVANCED SEARCH | SITEMAP

Home
Reviews
Reviews
See all
- Focal Sopra N°1 Bookshelf Loudspeaker Review
  December 8, 2025
- Bowers & Wilkins Px8 S2 Over-Ear Noise-Canceling Headphones
  November 25, 2025
- Vienna Acoustics Haydn SE Signature Bookshelf Speakers Review
  November 24, 2025
- Epson Lifestudio Flex Plus Projector Review
  November 19, 2025
- SVS Ultra Evolution Tower Speaker Review
  November 17, 2025
- Naim Uniti Nova Power Edition Integrated Amp and Streamer Review
  November 12, 2025
Features
Features
See all
- SECRETS Best of Awards 2025
  December 2, 2025
- Capital AudioFest 2025 Show Report
  November 26, 2025
- Paradigm/MartinLogan Factory Visit
  November 20, 2025
- Warsaw Audio Video 2025 Show Report
  October 30, 2025
- STAX Factory Visit – Carlo in Japan Part: 3
  October 23, 2025
- CEDIA 2025 Show Report
  September 4, 2025
Technical
Technical
See all
- The Art and Science of Designing High-End Audio Cables
  December 4, 2025
- From Silent Shadows to Singing Screens: How Hollywood First Brought Sound to the Movies – JJ’s Blogs
  November 26, 2025
- Understanding the Measurement of Noise When Looking at an FFT-Produced Spectrum
  November 13, 2025
- Intermodulation in Audio Signals
  November 6, 2025
- Why Tube Power Amplifiers Require Output Transformers and Why Their Design is Critical
  September 25, 2025
- How a Sine Wave is Calculated, Frequency Peaks Visualized, and Harmonic Distortion Measured Using Calculus and FFT Analysis
  September 4, 2025
- Technical Reviews
- Primers
Editorial
Editorial
See all
- Diving Into Audiophile Tweaking
  October 30, 2025
- Why Custom Installers Should Consider BenQ’s W5800 Home Cinema Laser Projector
  June 26, 2025
- My Go-To Power Amplifier When Compromise Is Not an Option
  April 24, 2025
- Listening to a Kii Three BXT System: Sometimes it is Good to Meet your Heroes
  April 16, 2025
- Secrets Becomes a Member of EISA
  April 10, 2025
- Magnetic Lazarus, or “How I Learned to Love Cassette Tapes”
  April 3, 2025
- Editor’s Desk
- OpEd
Blogs
Blogs
See all
- The Amazing Complexity of the Universal Pictures Frankenstein® Monster Makeup – JJ’s Blogs
  December 11, 2025
- Fosi ZP3 Preamplifier and Fosi V3 Mono Power Amplifier Review
  December 10, 2025
- From Silent Shadows to Singing Screens: How Hollywood First Brought Sound to the Movies – JJ’s Blogs
  November 26, 2025
- Shooting a Movie: Why Is It So Expensive? – JJ’s Blogs
  October 9, 2025
- How Makeup and Prosthetics in TV Programs Have Changed From the 1960s – JJ’s Blogs
  September 11, 2025
- Sorta Hifi Episode 16 – CEDIA and The Summer of Subwoofers.
  August 26, 2025
- Blogs & Little Things
- JJ Thoughts
OpEd
AV Directory
Recommended Gear

Home

Figure-2-Audio-Research-LS28-Preamplifier-Circuit-Board-without-Tubes

SecretsMay 13, 2019

Share On

See LatestFocal Sopra N°1 Bookshelf Loudspeaker Review

Secrets

Marantz MODEL 10 Reference Integrated Amplifier and LINK 10n Reference Network Audio Player Preview

Jim ClementsDecember 11, 2025
DALI EPIKORE 7 Floor-standing Loudspeakers Preview

Jim ClementsDecember 11, 2025
The Amazing Complexity of the Universal Pictures Frankenstein® Monster Makeup – JJ’s Blogs

John E. Johnson, Jr.December 11, 2025
Krix unveils next-gen modular cinema systems: MX-30i, MX-40i and the upgraded MX-20 Mk2

SecretsDecember 11, 2025
Fosi ZP3 Preamplifier and Fosi V3 Mono Power Amplifier Review

Glenn YoungDecember 10, 2025
Michell Audio

SecretsDecember 8, 2025
Michell Gyro SE Turntable Preview

Gene HopstetterDecember 8, 2025
Focal Sopra N°1 Bookshelf Loudspeaker Review

Craig ChaseDecember 8, 2025

VIDEO

Product Previews

Marantz MODEL 10 Reference Integrated Amplifier and LINK 10n Reference Network Audio Player Preview
December 11, 2025
DALI EPIKORE 7 Floor-standing Loudspeakers Preview
December 11, 2025
Michell Gyro SE Turntable Preview
December 8, 2025
Matrix Audio mini-i Pro 4 Preview
December 3, 2025
DALI Epikore 11 Loudspeaker Preview
December 3, 2025

Latest Editorial

Diving Into Audiophile Tweaking

October 30, 2025

Why Custom Installers Should Consider BenQ’s W5800 Home Cinema Laser Projector

June 26, 2025

My Go-To Power Amplifier When Compromise Is Not an Option

April 24, 2025

Listening to a Kii Three BXT System: Sometimes it is Good to Meet your Heroes

April 16, 2025

Latest Press

Krix unveils next-gen modular cinema systems: MX-30i, MX-40i and the upgraded MX-20 Mk2

December 11, 2025

Press Play: Magnetar’s MKII Series Now Shipping

November 28, 2025

SVS Doubles up on the Sound R|Evolution Experience for Capital Audiofest 2025

November 13, 2025

Connect with us

Facebook

Blogs & Little Things

The Amazing Complexity of the Universal Pictures Frankenstein® Monster Makeup – JJ’s Blogs

December 11, 2025

Fosi ZP3 Preamplifier and Fosi V3 Mono Power Amplifier Review

December 10, 2025

From Silent Shadows to Singing Screens: How Hollywood First Brought Sound to the Movies – JJ’s Blogs

November 26, 2025

Shooting a Movie: Why Is It So Expensive? – JJ’s Blogs

October 9, 2025

How Makeup and Prosthetics in TV Programs Have Changed From the 1960s – JJ’s Blogs

September 11, 2025

Newsletter Sign-up

SECRETS of Home Theater and High Fidelity was launched in 1994 as the first major publication offering serious audio/video journalism on the Internet.

Our magazine, which began with the publication of the SECRETS Primer, is available exclusively on-line and offers to our readers an extensive information resource about home theater and high-end audio.

Learn More

Reviews