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I'm liking the new NAD integrated offerings and have narrowed down to the C368 or the C388. I've read both manuals and have a question regarding how these units are implementing a High Pass Crossover to the main speakers and Sub.
The C368 manual states as follows: Filters provide easy bi-amplification or subwoofer integration by adding the required filters to redirect bass frequencies to the subwoofer.
High Pass: Low pass signal up to 300 Hz is attenuated and over 300 Hz sent to the speakers.
The C388 differs: High Pass: Low pass signal up to 150 Hz is attenuated and over 150 Hz sent to the speakers. This is based from 2nd order Linkwitz-Riley Crossover Filter @150 Hz. IMPORTANT NOTE If different crossover filter settings are required, it is recommended to use the filters built into the connected external Powered Subwoofer. Experiment by reversing the polarity of the Subwoofer or use a combination of filters, for example, the High Pass filter built into the C 388 and run full range to the Subwoofer and set the Crossover filter setting on the Subwoofer itself. Note that changing the level can also change the crossover frequency, so experimentation is the only way to get an optimal result.
My sub is an SVS1000 Pro so I have a lot of flexibility with the sub. What I'm not understanding is why would NAD fix high pass on the C368 at 300 Hz. This seems ridiculously high. And frankly even 150 Hz on the C388 seems high. I'm sure there is something I'm not understanding or there is information missing in the manual like what they mean by attenuation and how much they are reducing signal below the said frequency ranges.
Any help understanding this from owners or people with better understanding is much appreciated.
The C368 manual states as follows: Filters provide easy bi-amplification or subwoofer integration by adding the required filters to redirect bass frequencies to the subwoofer.
High Pass: Low pass signal up to 300 Hz is attenuated and over 300 Hz sent to the speakers.
The C388 differs: High Pass: Low pass signal up to 150 Hz is attenuated and over 150 Hz sent to the speakers. This is based from 2nd order Linkwitz-Riley Crossover Filter @150 Hz. IMPORTANT NOTE If different crossover filter settings are required, it is recommended to use the filters built into the connected external Powered Subwoofer. Experiment by reversing the polarity of the Subwoofer or use a combination of filters, for example, the High Pass filter built into the C 388 and run full range to the Subwoofer and set the Crossover filter setting on the Subwoofer itself. Note that changing the level can also change the crossover frequency, so experimentation is the only way to get an optimal result.
My sub is an SVS1000 Pro so I have a lot of flexibility with the sub. What I'm not understanding is why would NAD fix high pass on the C368 at 300 Hz. This seems ridiculously high. And frankly even 150 Hz on the C388 seems high. I'm sure there is something I'm not understanding or there is information missing in the manual like what they mean by attenuation and how much they are reducing signal below the said frequency ranges.
Any help understanding this from owners or people with better understanding is much appreciated.