Massdrop x THX AAA™ 789 Linear Amplifier - Impressions Thread
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greenmac

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A question For any UK users, what power block/adapter are you using as mine has arrived with US plug only

Thanks
 
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escalibur

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Unfortunately those measurements are mostly of the builtin multibit DAC and multibit DACs don't measure well but sound very good. I've seen Jot's measurement on another forum and they seemed to be about the same as 789's in the audible range.
Sure there is also a 'human part' where some can hear the difference and some not. However in the age of THX 789 and soon to be released THX 887 I wouldn't run for Jotunheim at this moment. Of course everyone on his own. :)
 
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aloki

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I just got my THX 789 and I was wondering:

If I plug two of the same headphones, say Oppo PM-3 (26 ohm impedance and 102 dB in 1 mW sensitivity); one into 3.5mm SE and the other into 1/4in SE, would I run the risk of damaging any of my equipment?

I want to connect my Modi 3 to the THX, and run the passthrough to my Magni 3 (my previous set up was the Schiit stack) to create sort my own subjective little test bench: Use the Oppos in the THX to see if I hear any difference between the two Oppos (to set the control/base level standard) and then run the Oppos between the Magni and THX to see what differences I hear between the amps, note those differences and then run different kinds of headphones through the Magni and THX to hear any differences there may be, ascertain which pairings I like better, and such.

The first step is making sure I don't damage anything in establishing the control for my future tests.

Any input is appreciated!
 
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Fat 5miley

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A question For any UK users, what power block/adapter are you using as mine has arrived with US plug only

Thanks
I changed the power cable to one with a UK plug
You can get cheap ones from ebay, search for IEC C7 power lead
 
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ayang02

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S.M.S.L SP200 THX AAA 888. I wonder if it's another 789 clone. At least this time around, the form factor looks smaller.
 
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eeagle

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I just got my THX 789 and I was wondering:

If I plug two of the same headphones, say Oppo PM-3 (26 ohm impedance and 102 dB in 1 mW sensitivity); one into 3.5mm SE and the other into 1/4in SE, would I run the risk of damaging any of my equipment?
/QUOTE]
You'll be fine, all 3 outputs can be used simultaneously. They are in parallel so volume may change as HPs are plugged in and removed. The output impedance is quite low with this amp so it accommodates a wide variety of HPs and IEMs.
 
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TJ Max

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Please share your impression of the AAA 789 -> Z7M2. :beerchug:
The Sony MDR-Z7m2 are probably the best fit for the THX 789 over the other headphones I tried. Beyerdynamic T1 and T5P, and Sennheiser HD579
I'm going to be the odd one and admit that the THX 789 is a very clinical sounding amp. It benefits from being either connected to a source / DAC or headphones with a distinct sound signature that the listener prefers. If the source and headphones are near flat and neutral, the THX 789 with do no favors. I found the sound to be a bit boring, and I'm not convinced that a near flat musical presentation is what was intended in the recording studio. It may work for full sized speakers interacting with a room, but not for headphones.
I'm currently using a Bluesound Node 2i connected by digital coax to a Schiit Gungnir Multibit dac using its single ended output to the THX 789, I do have the option of going completely balanced, but the sound comes across a harsher to my ears. I am however borrowing the balanced headphone cable from Beyerdynamic. It's of good quality. Looks better than Sony's, and cost about $180 cheaper and fits the MDR-Z2 perfectly. The Balanced output is fine, with a single ended input. To get a less clinical sound though I added my Schiit Loki Equalizer into the chain. And I'm sorry but I had to put on a bit of a smiley faced EQ because I like enjoying my music in addition to just listening to it's sound.

thx789SonyLoki.JPG
 
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Anyone here keeps the THX789 on all day?

Is it okay to leave the unit on all day long?
 
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PointyFox

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.
 
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protoss

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Anyone using a different power cable/brick with the THX789? Custom 3rd party powercable/brick?
 
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1. No DAC
2. External power supply
3. Made in China (guess)

4. How does it actually sound?
That’s the key one for me.

With respect to the other three points:

1. I’d rather use my own DAC that I like and have picked for myself rather than one picked for me that I have to pay for whether I like it or not.
2. This depends on how good a job they do with the external power supply. Also, it allows for an easier power supply upgrade if desired. I prefer to separate the power supply and circuit in my builds, so I see this as a good thing.
3. Probably a good guess.



https://www.massdrop.com/buy/massdrop-x-thx-aaa-789-linear-amplifier

https://www.audiosciencereview.com/...easurements-of-massdrop-thx-aaa-789-amp.5001/

The Massdrop x THX AAA 789 is finally here and it's pretty incredible! :grinning:

If you're looking for an ultra-neutral, hyper-transparent amp with plenty of power, the 789 should be at the top of your list.

Discuss!



https://www.massdrop.com/buy/massdrop-x-thx-aaa-789-linear-amplifier

https://www.audiosciencereview.com/...easurements-of-massdrop-thx-aaa-789-amp.5001/

The Massdrop x THX AAA 789 is finally here and it's pretty incredible! :grinning:

If you're looking for an ultra-neutral, hyper-transparent amp with plenty of power, the 789 should be at the top of your list.

Discuss!
 
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kelvinwsy

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I just got my 789 4 days ago hv run it in with the following 24v 2.89amp Linear PSU .. Sounding great from a SMSL VMS D2 Balanced dual ESS0938 pro chip DAC. HP Verum 1 gives good balance of dry sound of the 789 with the richer sound of the Verum ..
Enough power for the inefficient HE560's too
 

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