NW-A1000 has a few EQ options: None Jazz Pop Heavy Custom 1 Custom 2 The setting 'none' should be EQ-less. However when i compared the Custom 1 setting with everything set to flat to the 'none setting', they sounded different significantly. With the 'none setting' on, the mids and lows are slightly boosted, while the Custom 1 Setting with everything flat sounds, well, flat! Did Sony "do" something to the original sound? Did they intentionally colored the sound quality? Thank You in advance for your help.