tjcinnamon
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I just purchased the Polk L800's with SDA which have some particular amp requirements. I'm looking for an amp that is 300W @ 4ohm that's 3 channels or more. The impedance on these speakers is 2.8 to 4ohms per Polk
My budget is about $3000. So far the short list is the MonoPrice Monolith 11CH and the Anthem MCA 325. Other brands are welcomed.
https://www.audioholics.com/tower-speaker-reviews/polk-legend-l800
One important set up point is that differential output amplifiers will not work as well with the SDA technology. The SDA feed comes from the positive leg of the speaker inputs. With single-ended amplifiers, that gives all of the difference signal, but with a differential amp, you only get half of the difference signal. We tested both and found better sound with single-ended amplifiers. Most modern Class D amplifiers have differential outputs and won’t work well, such as the Cherry Megachino I tried, the Hypex based amplifiers (including Marantz’s own Reference PM-10), various NAD amplifiers, etc. Most amplifiers in general are single-ended output so finding a good amplifier that works is not a big problem. The best way to tell is to look at the back of the amplifier and see if it notes that the negative terminal of the amplifier cannot be connected to ground or if it is referred to as a balanced output or differential output amplifier. If all else fails, ask the manufacturer.
My budget is about $3000. So far the short list is the MonoPrice Monolith 11CH and the Anthem MCA 325. Other brands are welcomed.
https://www.audioholics.com/tower-speaker-reviews/polk-legend-l800
One important set up point is that differential output amplifiers will not work as well with the SDA technology. The SDA feed comes from the positive leg of the speaker inputs. With single-ended amplifiers, that gives all of the difference signal, but with a differential amp, you only get half of the difference signal. We tested both and found better sound with single-ended amplifiers. Most modern Class D amplifiers have differential outputs and won’t work well, such as the Cherry Megachino I tried, the Hypex based amplifiers (including Marantz’s own Reference PM-10), various NAD amplifiers, etc. Most amplifiers in general are single-ended output so finding a good amplifier that works is not a big problem. The best way to tell is to look at the back of the amplifier and see if it notes that the negative terminal of the amplifier cannot be connected to ground or if it is referred to as a balanced output or differential output amplifier. If all else fails, ask the manufacturer.