Smugsoftware fuzzmeasure 3.011/13/2022 The traces in fig.2 do suggest that there is a little too much overlap between the woofers at the top of their passband and the lower-midrange unit at the bottom of its passband. The output of the ports, however, shows a classic bandpass response that peaks at the same 29Hz and, commendably, contains no midrange peaks.įig.3 Vivid Giya G3, anechoic response on tweeter axis at 50", averaged across 30° horizontal window and corrected for microphone response, with complex sum of nearfield responses plotted below 300Hz. The minimum-motion notch in the woofers' low-frequency output lies at 29Hz, as suggested by the impedance-magnitude trace in fig.1, but is less well defined than usual for a reflex design. A couple of midrange peaks are evident in the woofers' upper-frequency output, but the crossover suppresses these by 20dB or more. The lower-midrange unit's output rolls off steeply below the specified crossover point of 220Hz. The upper-frequency farfield response on the tweeter axis is superbly flat, with small peaks balanced by small dips and a slight rolloff above 20kHz. Smugsoftware fuzzmeasure 3.0 drivers#Listening to the various enclosure surfaces with a stethoscope confirmed that the enclosure was, in general, very dead, if slightly less so between 300 and 400Hz in a small region toward the speaker's spine, just below where the coiled and tapered tube reenters the body.įig.2 shows the individual responses of the HF/MF drivers (blue trace), the woofers (green), and the ports (red), the nearfield levels scaled in the ratio of the square roots of the radiating areas. However, when I investigated the enclosure's vibrational behavior with a plastic-tape accelerometer, I could find no resonant modes. Though there are no discontinuities in the impedance traces (other than one at 37kHz, probably due to the first breakup mode of the tweeter's aluminum dome), there is some unevenness. The G3's high-frequency impedance is higher than that of the Giya G1, which uses the same drive-units (see fig.1 here), perhaps because the drivers are resistively padded down to match the lower sensitivity of the G3's woofers.įig.1 Vivid Giya G3, electrical impedance (solid) and phase (dashed) (2 ohms/vertical div.). There is a current-hungry combination of ≤0° phase angle and 5.2 ohms at 25Hz though music rarely has high energy in this region, and the speaker's impedance in the midrange and treble is very high, a good, 4 ohmrated amplifier should be optimal for driving the G3. The impedance drops below 6 ohms only in the bass, otherwise remaining above 4 ohms, as specified. How the Giya G3's impedance magnitude and electrical phase angle vary with frequency is shown in fig.1. The G3 is specified as having a voltage sensitivity of 87dB/2.83V/m my estimate was slightly lower than this, at 86dB(B). I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the Vivid Giya G3's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield and spatially averaged room responses.
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