loading
reading
writing
saving
searching
LSA Hyperdrive 2 - $550 (redondo beach)
QR Code Link to This Post
Total harmonic distortion
Preamp:
1.0Vrms output into 47kohm at 1kHz has 0.0021% THD, higher output amplitudes will track similarly to HPA output below as signal from HPA is fed to an opamp buffer to driver the preamp outputs.
Headphone Amp with 33ohm load:
3.8 mW is 0.0036% THD
30 mW is 0.0036% THD
60 mW is 0.0037% THD
293 mW is 0.0055% THD
620 mW is 0.0072% THD
1.7W is 0.011% THD (Max Power)
Intermodulation distortion
N/A
Power Consumption
1.6W (standby – plugged in) and 12.5W (on) measured at 120Vac
Frequency Response
Flat within +/-0.5dB from 10Hz to 22kHz
Gain
0dB, 6dB, 12dB selectable
Noise
Preamp: -115dB noise floor referenced to 1.0Vrms at 0dB for preamp output into 47kohm load
Headphone Amp: -122dB noise floor referenced to 1.0Vrms at 0dB into 33ohms
Maximum Output Sensitivity
1.86Vrms input at 12dB gain setting will produce maximum signal before clipping at the headphone amp output
The preamp outputs have -6dB gain applied to them, and so their gains are -6dB, 0dB, and +6dB (corresponding to the 0dB, 6dB, and 12dB gain switch for the headphone amp) at the RCA’s out.
Maximum Output of the preamp outs is 3.7Vrms for 1.86Vrms input at the 12dB gain setting.
HEADPHONE:
Output Power
1.7 Wrms into 33ohms
Output Impedance
13 ohms (per TI datasheet for TPA6120A2)