Definitive Technology Mythos XTR-50 On-Wall Speaker System HT Labs Measures

HT Labs Measures

L/R Sensitivity:
92 dB from 500 Hz to 2 kHz

Center Sensitivity:
92 dB from 500 Hz to 2 kHz

Surround Sensitivity:
90 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the Mythos XTR-50 (vertical) L/R (purple trace), Mythos XTR-50 (horizontal) center channel (green trace), Gem surround (red trace), and SuperCube III sub (blue trace). All passive loudspeakers were measured with grilles at a distance of 1 meter with a 2.83-volt input and scaled for display purposes.

The left XTR-50’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.49/ –2.90 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 179 Hz, and the –6-dB point is at 151 Hz. Impedance reaches a minimum of 4.33 ohms at 565 Hz and a phase angle of –44.87 degrees at 254 Hz.

The center XTR-50’s listening-window response measures +1.84/ –2.83 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +0.75/–3.13 dB from 200 Hz to 10 kHz. The –3-dB point is at 179 Hz, and the –6-dB point is at 150 Hz. Impedance reaches a minimum of 4.53 ohms at 754 Hz and a phase angle of –36.14 degrees at 254 Hz. Please note that when wall mounted, you should expect the response below a few hundred hertz to increase due to the effect of boundary gain, which is not represented in our quasi-anechoic measurements.

The Mythos Gem’s listening-window response measures +2.06/–2.25 dB from 200 Hz to 10 kHz. The –3-dB point is at 183 Hz, and the –6-dB point is at 143 Hz. Impedance reaches a minimum of 4.60 ohms at 350 Hz and a phase angle of –47.96 degrees at 188 Hz.

The SuperCube III’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 50 Hz and the –6-dB point is at 29 Hz. The upper –3-dB point is at 100 Hz using the LFE input.—MJP

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Stephen Trask's picture

It seems to me that when these speakers were released there was nothing really like them in terms of form factor and sound/build quality and price. Now, of course, Sandy Gross has started a new company producing essentially the same item. Paradigm have recently refreshed their LCR offerings to compete in this area. Does the stellar assessment of these speakers still hold? Of have the Goldenear speakers eclipsed them by offering the same quality and form factor at a lower price?

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