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Customers reviews: “ | |||||||
| "... At the moment, I have performed only a “physical” start and initial comparisons with two monolithic op-amps with a bipolar input in the cascade of a differential signal subtractor of DAC AK4497. The first results are very positive with the direct replacement of LME49710HA with AS401. For the test 1 kHz signal, there is a decrease in the 2nd harmonic level by 1dB, the 3rd - by 2.5 dB, the 4th - without change, 5th - at 1.5 dB. For a test signal of 19 + 20 kHz with a peak sum level of 3 V, the 1 kHz difference tone decreased by 3.5dB - ( from -119 to -122.5dB). The total tone 39kHz decreased from -102 to -108.5dB. Comparison with LT1028 is even more in favor of AS401, especially in the total tone of the dual-frequency signal. OPA1611 is significantly worse in terms of high-order component distortion (8 ... 10 and higher) ...” “… I replaced the op-amp OPA1611 with a AS401 in the DAC with the AK4493. With AS401 I noted a more full-bodied, rich and more structured sound in the low frequency range of the audio range. Voices of artists acquired great plasticity and physicality. The sound in the high-frequency region has become less intense and more analog. ...” " TECHNICAL DOCUMENTATION:
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Contact information |
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• 140 Ropazu Str., • Riga, LV-1006, Latvia |
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• tel: +371 67553075 • fax: +371 67553173 • www.alfarzpp.lv |