About Us


Hi, my name is Mark Fitzgerald and I am the owner of Rosewood Sound. I have worked in audio for 30 years. My early work included many large national tours, but as the volume levels escalated I lost interest. I spent most of the next several years at Syracuse University where I designed my own degree program in audio, taught recording studio and worked for the Audio Archives and lab. I became matriculated as a graduate student in Electrical Engineering and completed many courses, including those in boundary value problems and both Fourier and Laplace Analysis. I have written papers on Horn Theory, Signal to Noise Ratio, and Time Delay Spectrometry. This has equipped me to pursue the state-of-the-art in audio, and stay abreast of every new development in design. materials, hardware and software. That has given me a vantage point, which enables me to precisely separate the "wheat from the chaff" as new claims are made by various manufacturers. Additionally, my education has enabled me to carry on research and design work that has led to Rosewood Sounds advanced designs. Ours are resonance free, virtual point source speaker systems.


On Resonance

Resonance is what happens when an inertance and a compliance (perhaps a spring and a mass, or perhaps an inductor and a capacitor, or perhaps a chamber of air and a mass of air in the port or “neck” of the chamber) exchange potential and kinetic energy

Resonances are a part of music! Indeed all instruments resonate.

However, should a sound system resonate, it will mask the next tone with the (artificial) decay of the previous tone. Indeed false harmonics, sometimes called “frequency aliases” are formed, and the very harmonic structure of the music is then modified by these “cross modulation products” which did not exist in the original music. This is only the tip of the iceberg. The loss of transient response due to “spurious resonances” in the speaker system, crossover network or equalizer results in a severe loss of detail, and therefore impacts the musicality of the presentation.

Therefore, our research in reducing the energy–time curve (ETC) of our sound systems is one real reason why our sound systems can be used to create the illusion that the artist is not being amplified. This “illusion” will occur in spite of the fact that we are raising the audio levels throughout the concert hall to a suitable level.


I can be reached at 325 472 6450 or the shop 325 437 6427 fax # 315 437 9305
email Mark@rosewoodsound.com