It is often mentioned the use of poor measuring amplifiers for subwoofer usage. But I am curious up to what frequency range this is?
I mean can I use a poor measuring amplifier up say about 1000hz? I am presuming no but I thought ill ask just to get a better picture.
Of course this is for bia-mping and the woofer in question is the midrange.
I mean can I use a poor measuring amplifier up say about 1000hz? I am presuming no but I thought ill ask just to get a better picture.
Of course this is for bia-mping and the woofer in question is the midrange.
I think that's based on the idea that a subwoofer will act as a low pass filter and not generate higher order harmonics present in the signal, and already has high enough mechanical distortion that you don't care so much about the amp.
In practice high harmonics of low bass are right in the most sensitive frequency range for the ear, and many forms of music have high amplitudes of low bass to start with, so I think you want pretty good subbass amp performance (in particular low cross-over distortion at signal levels), as mechanical distortion is mainly H3 (unless a port is chuffing or the cone is damaged or breaking up). With an active crossover there's no support from the crossover to remove higher harmonics that the amp generates.
But any decent class-D these days will be good enough w.r.t. distortion - you probably want class B for good damping factor though, as the area around resonance is where a subwoofer tends to operate.
In practice high harmonics of low bass are right in the most sensitive frequency range for the ear, and many forms of music have high amplitudes of low bass to start with, so I think you want pretty good subbass amp performance (in particular low cross-over distortion at signal levels), as mechanical distortion is mainly H3 (unless a port is chuffing or the cone is damaged or breaking up). With an active crossover there's no support from the crossover to remove higher harmonics that the amp generates.
But any decent class-D these days will be good enough w.r.t. distortion - you probably want class B for good damping factor though, as the area around resonance is where a subwoofer tends to operate.
It is really very nice of you to reply in such detail, I will read over it 1000 times and learn from it.
But I was curious more about midrange up to around 1000hz. Although now your saying that decent amp is important for sub bass as well so I am presuming that for a low midrange its even more important to have a low distortion amp.
But I was curious more about midrange up to around 1000hz. Although now your saying that decent amp is important for sub bass as well so I am presuming that for a low midrange its even more important to have a low distortion amp.