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I contacted Topping with a few questions, and they responded promptly. They confirmed that the MX3 is not firmware upgradeable, does not have AptX, and its speaker terminals and subwoofer-out are full-range at all times (no sub crossover).
AlanDixon
48
Oct 23, 2017
mattris> the MX3 is not firmware upgradeable, does not have AptX, Well that nixes any chance of me ordering it.
AlanDixonYeah, I wanted to like this one, but they cut too many corners. Perhaps next time, Topping!
Ryoco
18
Oct 23, 2017
mattrishttps://www.newegg.com/Product/Product.aspx?Item=9SIA1J756S5071&cm_re=bluetooth_amp_astell-_-0ZK-04TC-00001-_-Product
Check this one out. Since it's from AK it'd be overpriced but it even supports aptX HD codec.
RyocoThat AK device is a wearable DAC/headphone amp. An alternative device to the MX3 would be the SMSL AD18, which has AptX, a fancier display, additional features/settings, and a smaller footprint.
Feature-wise, the only reason to get the MX3 over the AD18 is its twice-as-powerful headphone-out... and simple, orange display.
tessierpg
Dec 7, 2017
mattrisDoes that means that the Sub Out may be used as a line out, so that can use the unit solely as a DAC with line out? Do you know then what are the output specs of the Sub Out ? Is it 2v output?
pinktank
11
Dec 8, 2017
mattrisWhich email address did you use? I couldn't reach them. @tessierpg you couldn't use it via the sub out but you could use the headphone out as a pre-amp. Sub out is mono summed.
tessierpg
Dec 8, 2017
pinktankYes You are right, I just didn’t think right regarding that sub output. It’s just too bad that this unit falls short from having a true stereo analog line out for the DAC it carries.
pinktank
11
Dec 8, 2017
tessierpgDesktop amps generally don't have a line-out, just FYI in case that is what you are looking for.
Tili
0
Jan 2, 2018
mattristhank you I almost pulled the trigger on this
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