Ohm Speakers 
Marty Gerstein started Ohm to bring Lincoln Walsh’s technology to market. Marty was the Chief of Engineering at Rectilinear Research in the Bronx. He also hosted a show on public radio…
The Early Days of Ohm
Two New Models in 20/20K Series Walsh Speakers
BROOKLYN, NY – Ohm Acoustics has filled out its new line (20/20K Series) of speakers with the introduction of the Super Walsh 3.3010 and Super Walsh 4.4012 models. All models have a…
Sound Pressure Levels in Live Versus Recorded Music.
I prefer acoustic music played without amplification – particularly the human voice without microphones and PA. Luckily, we all listen to spoken voices every day and have learned from…
Headphones: Imaging & Danger
Headphones: imaging and hearing loss. “Head Monster” Noel Lee is rumored to have told Beats founders Jimmy Iovine and Dr. Dre, that ‘Headphones are the new speakers.’ The sales…
Lucky Timing and My Best Business Decision
As mentioned in Getting Started, Tech Hifi began in my dormitory room at MIT. The local audio dealers pressured the school to have me move off campus or stop selling. I moved across the…
Amplifier Damping – Another Wet Blanket.
How does amplifier damping factor (DF) impact the sound of loudspeakers and, thus, the sound of music in your room? Tube amps usually have DFs of about 20 or less while many solid state…