PS Audio Sprout and Teac AI-301DA Integrated AmpDACs Review Test Bench

Test Bench

PS Audio Sprout Integrated Amplifier
Two channels driven continuously into 8-ohm loads:
0.1% distortion at 29.1 watts
1% distortion at 34.7 watts

Two channels driven continuously into 4-ohm loads:
0.1% distortion at 52.8 watts
1% distortion at 58.8 watts

Analog frequency response:
–41.10 dB at 10 Hz
–24.15 dB at 20 Hz
+7.10 dB at 70 Hz
–0.31 dB at 20 kHz
–4.62 dB at 50 kHz.

48 kHz PCM frequency response:
–41.05 dB at 10 Hz
–23.60 dB at 20 Hz
+7.14 dB at 70 Hz
–0.50 dB at 20 kHz
+1.36 dB at 24 kHz.

This graph shows that the Sprout’s left amplifier channel, with two channels driving 8-ohm loads, reaches 0.1% distortion at 29.1 watts and 1% distortion at 34.7 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 52.8 watts and 1% distortion at 58.8 watts.

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THD+N from the amplifier was less than 0.048% at 1 kHz when driving 2.83 volts into an 8-ohm load. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –61.16 dB left to right and –61.42 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –92.78 dBrA.—MJP

Teac AI-301DA Integrated Amplifier
Two channels driven continuously into 8-ohm loads:
0.1% distortion at 24.6 watts
1% distortion at 27.8 watts

Two channels driven continuously into 4-ohm loads:
0.1% distortion at 37.5 watts
1% distortion at 50.2 watts

Analog frequency response:
–0.13 dB at 10 Hz
–0.03 dB at 20 Hz
–0.13 dB at 20 kHz
–3.46 dB at 50 kHz.

48 kHz PCM frequency response:
–0.13 dB at 10 Hz
–0.03 dB at 20 Hz
–2.08 dB at 20 kHz
-0.74 dB at 24 kHz.

This graph shows that the AI-301DA’s left amplifier channel, with two channels driving 8-ohm loads, reaches 0.1% distortion at 24.6 watts and 1% distortion at 27.8 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 37.5 watts and 1% distortion at 50.2 watts.

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THD+N from the amplifier was less than 0.031% at 1 kHz when driving 2.83 volts into an 8-ohm load. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –78.59 dB left to right and –82.24 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –92.23 dBrA.—MJP

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