I wouldn't take that statement too seriously. Amplifiers that use feedback excessively tend to be cheap lo-fi products and some mid-fi products. A quality amplifier, especially one whose sound quality has generally received favorable commentary, will not be one that uses excessive feedback.
Feedback improves gain linearity, reduces output impedance if used in the output stage, and reduces measured total harmonic distortion. These will be good anyway in a quality design, without a lot of feedback. If used excessively, such as to make a low quality design measure well in terms of these parameters, that improvement comes at the expense of transient response, transient intermodulation distortion, and overall sound quality.
That said, if the manual or product literature on the amplifier does not talk about the amount of feedback that is used (and they usually don't), you would probably have to ask the manufacturer.
Regards,
-- Al
Feedback improves gain linearity, reduces output impedance if used in the output stage, and reduces measured total harmonic distortion. These will be good anyway in a quality design, without a lot of feedback. If used excessively, such as to make a low quality design measure well in terms of these parameters, that improvement comes at the expense of transient response, transient intermodulation distortion, and overall sound quality.
That said, if the manual or product literature on the amplifier does not talk about the amount of feedback that is used (and they usually don't), you would probably have to ask the manufacturer.
Regards,
-- Al