經典TDA1541A DAC 中

rmaa + onboard sound card test左d基本野參考
但個結果

Summary
Frequency response (from 40 Hz to 15 kHz), dB +0.27, -2.25 Average
Noise level, dB (A) -74.6 Average
Dynamic range, dB (A) 74.7 Average
THD, % 0.105 Average
THD + Noise, dB (A) -57.5 Poor
IMD + Noise, % 0.120 Average
Stereo crosstalk, dB -69.6 Good
IMD at 10 kHz, % 0.178 Average
General performance Average

個結果真係令我失望
仲差過onboard sound card loopback 結果
而且Level change -1.7 dB / -1.8 dB
重有d左右聲壓不平

係咪個膽輸出令到個結果咁,定係1541係咁差呢


箱內設計