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Dayton PC105-4 Frequency Response (manufacturer) Fig 1 is my measurement of the PC105-4 with her mounted onto a 7 liters Bass Reflex box. It resembles the response from the manufacturer. Note the slight bump from 1kHz~2kHz that appears in both plots.
The Waterfall plot (Fig 2) recorded two artifacts at 10kHz and 18kHz. Nothing to worry about because this is a highly magnified view (t=2msec).
The Spectrogram in Fig 3 is a 2D view of the Waterfall. From 2kHz onwards, the artifacts are dissipated by 2 msec. Basically, inaudible. However, from 500Hz~2kHz, the Green streaks are up to 6 msec.
The Excess Phase (Fig 4) recorded four glitches from 700Hz~3kHz. It is best to avoid using EQ at these spot frequencies.
The Step response in Fig 5 shows a fairly fast attack. Her decay, on the other hand, is disappointing. Ideally, it should be the same as the attack but that is in theory only. In real life, it seems that the PC105-4 exhibits some ringing.
The Harmonic Distortion (Fig 6) is quite revealing. From 700Hz~20kHz, her distortion is fairly low and is dominated by the 2nd order harmonics. What is troubling are those below 700Hz. Suddenly, the distortion shoots up and worse still, it’s now the odd 3rd order. For listeners with sensitive hearing, this may irritate the ears. One option to avoid this is to use the PC105-4 from 700Hz onwards. Somewhat similar to using midrange horns. Summary Frankly, for a mere $18, the Dayton PC105-4 is an excellent Full Range woofer. She measures better than the HiVi C3N-III which I tested out in 2023. In my next post, I’ll be auditioning this PC105-4. I think there’s potential with this 4″ driver. Unless otherwise stated, all measurements were made in Full Space (4 pi) with the mic at 36 ins, tweeter axis. Impulse Window=5ms. No smoothing applied. |
April 5, 2026HIFI DRIVERS
