GPX HTD2204 HTIB HT Labs Measures
Two channels driven continuously into 8-ohm loads:
0.2% distortion at 3.5 watts
1% distortion at 4.0 watts
Two channels driven into 4-ohm loads:
0.2% distortion at 4.7 watts
1% distortion at 5.8 watts
This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the satellites (purple trace) and subwoofer (blue trace). The passive loudspeaker was measured at a distance of 1 meter with a 2.83-volt input and scaled for display purposes.
The satellites's listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +8.33/–5.26 decibels from 300 hertz to 10 kilohertz. An average of axial and (+/–15-degree) horizontal responses measures +8.41/–5.25 dB from 300 Hz to 10 kHz. The –3-dB point is at 267 Hz, and the –6-dB point is at 244 Hz. Impedance reaches a minimum of 5.85 ohms at 531 Hz and a phase angle of –17.19 degrees at 326 Hz. Sensitivity averages 87 dB from 500 Hz to 2 kHz.
The subwoofer's close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 59 Hz and the –6-dB point is at 50 Hz. The upper –3-dB point is at 127 Hz.
Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –65.32 dB left to right and –66.26 dB right to left. THD+N from the amplifier was less than 0.041 percent at 1 kHz when driving 2.83 volts into an 8-ohm load. The signal-to-noise ratio with 2.83 volts driving an 8-ohm load from 10 Hz to 24 kHz with "A" weighting was –103.37 dBrA.—MJP