Epiphone EC-20 Classical Guitar

With Used Tarnished Strings

Epiphone EC-20 Classical Guitar

Gray – Untreated Color – Treated

Vert Axis = dB Horiz Axis = Hertz (Hz) 60-band

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We tested an Epiphone EC-20 Classical Guitar with badly tarnished Augustine “Blue” strings.

The fundamental range of the acoustic guitar is approximately 82-988 Hz with the harmonic range from 1 kHz to 15 kHz. What gives the classical guitar its unique tonal quality is the combination of construction, materials, along with nylon and nylon gut strings. We tested an Epiphone EC-20 Classical Guitar with badly tarnished Augustine “Blue” strings.

The Results
Results from the test showed a modest improvement in the fundamental frequency range. There was a marked improvement starting with the low mid-range (low order harmonics) which affects the presence of the guitar. We see a continuation of this trend into the upper midrange from 4 kHz to 6 kHz areas responsible for clarity and definition of the instrument. The improved response from the 6 kHz up to 16 kHz range restored the crispness of string attack and brightness of tone. The application of STRINGTone brought the original tonal quality of the instrument “back to life” restoring a balance of fundamental and upper harmonic frequencies.