Drop + THX AAA™ 789 Linear Amplifier Discussions | Drop

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Drop + THX AAA™ 789 Linear Amplifier

Nov 18, 2018

Got mine yesterday, after 10+ hrs of listening on multiple different headphones i can report that this thing is exceptionally clean and quite powerful when needed. The only thing that i didn't like was the power button and the SE jacks, these felt little unfinished. I am replacing my Aune x7s with this and that's saying something

Nov 18, 2018

GiantHeadphoneSquid

639

Nov 18, 2018

GurbakhshishI have a pair of T60RPs coming in this week, I am excited inventory finally surfaced again, the 4 in stock where I bought mine got gobbled up almost immediately. . .

Nov 18, 2018

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Gurbakhshish

214

Nov 18, 2018

GiantHeadphoneSquidyea, these can be bit hard to find

Nov 18, 2018

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GiantHeadphoneSquid

639

Nov 18, 2018

GurbakhshishI can't imagine the crazy detailed/machined mahogany T50 themed enclosure is easy to manufacture :)

Nov 18, 2018

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Mark_M

236

Nov 18, 2018

GurbakhshishI have the Aune X7S paired with the Massdrop Grace SDAC. I'm powering 6XX and 58X now. Is it really worth it to jump to the THX 789??

Nov 18, 2018

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Gurbakhshish

214

Nov 19, 2018

Mark_Mif you are powering 6xx and 58x with it then its not much of a upgrade. but if you have something little more power hungry then you might wanna consider the upgrade

Nov 19, 2018

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Mark_M

236

Nov 19, 2018

GurbakhshishNo other headphones yet. But what about sound signature? Is there a noticeable difference between this and the X7S?

Nov 19, 2018

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Gurbakhshish

214

Nov 19, 2018

Mark_MBoth of these are VERY clean solid state amps so there is no audible sound coloration. The other think you wanna consider with x7s is that its output impedance is around 12-10 ohms, so it might not play well with low impedance headphones. This one is 1ohm so you won't have the same issue. x7s is a class A amp so it runs hot this is AB so it is extremely efficient. Some people prefer class a bit I didn't hear any different when it comes to dynamic range

Nov 19, 2018

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Mark_M

236

Nov 19, 2018

GurbakhshishSo something like a 32Ohm headphone may not work well on the X7S? I don't have anything with that low of impedance. I do think the 789 would look better with the Grace SDAC sitting on top. Plus I don't care for the proprietary power cable for the X7S.

Nov 19, 2018

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Gurbakhshish

214

Nov 19, 2018

Mark_MNot all the 32ohm headphones will have issues with x7s but some might. one way to know is to look at the impedance/frequency graph for your headphone. I am using topping d10 as my dac for this. There is a good reason why Aune used that power connector for x7s. Its a 5 pin connector, it separates the power relays to controls and leds from actual amp transformer power. So theoretically its much smaller noise footprint which you can see in the measurements of x7s. Of course its all pointless considering the fact that 789 has better SNR.

Nov 19, 2018

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