Massdrop x THX AAA™ 789 Linear Amplifier - Impressions Thread
Jun 10, 2023 at 9:42 AM Post #2,569 of 2,584
No, we don't just use half the input signal. We use it all, through an instrumentation opamp differential input stage.
Both 789 input types are extremely high quality with impeccable measurements. For most setups, indistinguishable.
Choose the DAC you like best, and if you must use RCA use short cables 1-2ft. It'll be awesome. Cheers!

Is Andrew still around at THX?

This is such a classic amp - a game changer at the time and still very very good today.
Jul 9, 2023 at 8:54 PM Post #2,570 of 2,584
Hello All!

Question, How would one go about removing the Volume Knob? This scratchy volume pot needs to be replaced.
Jul 18, 2023 at 4:08 PM Post #2,571 of 2,584
Has anyone moved from a THX 789 to a SMSL SH9?

The 789 is one of the few amps that surprises me. I was wondering if the SH9 would be more of the same great thing.
Jul 19, 2023 at 3:30 PM Post #2,576 of 2,584
No, would be the same. Probably the number game that would be different but no audible difference for sure.

I think that if I did order the SH-9 I would find it the same or worse and be somehow disappointed. There are a few reviewers that say it comes close to the HPA4, which I have heard.

If the SH-9 goes on sale or Drop I may get it.
Aug 27, 2023 at 7:01 AM Post #2,578 of 2,584
I haven't used my 789 for ages, so dug it out this morning and have to say it sounds fantastic! 😊

Aug 27, 2023 at 7:57 AM Post #2,580 of 2,584
Hello I thought people say THX 789 and Arya not a good pairing, something about sounding too bright no ? I dont see the dac pairing with 789 :wink:
It doesn't sound bright to me?!

The DAC is the Metrum Acoustics Adagio.

Users who are viewing this thread