Drop + THX AAA™ 789 Linear Amplifier
Drop + THX AAA™ 789 Linear Amplifier
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Product Description
Announced at CES 2018, the Drop + THX Achromatic Audio Amplifier (THX AAA™) 789 is a linear bipolar amplifier with feed-forward error correction. It’s designed for objectivists who appreciate an incredibly clean, transparent amp—the sought-after “wire with gain” whose amplification is wholly uncolored by a sound of its own Read More

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Kevin
3927
Outreach
Sep 16, 2020
Stickied
Hey everyone, it looks like the shipment of these is going to be arriving early, and we plan to ship them before the end of September (instead of October!). Will post another update shortly when we have more precision about the ship time. Sept 21st Update: Shipment arrived at our warehouse today. We'll spend a few days unpacking, counting, and shelving everything, and then it'll start shipping. My guess is everything will be shipped by early next week (hopefully sooner!)
(Edited)
nick_t
218
Oct 23, 2020
Hello ? may I have a reply ?
Bradski
31
Oct 23, 2020
nah
crsmart2
0
Oct 25, 2020
set up question: I want to connect my turntable directly to this amp just to power headphones. Can I also run RCA from passthrough to an AVR to power and control volume of speakers?
Sparksta
3
Oct 25, 2020
I'm wondering if the amp isn't shipped with a correct power supply to use safely in Australia, what power supply can I use that will allow me to use the amp correct without blowing myself up.
chocobar091
0
Oct 24, 2020
Hello, I am new to this audio amp and dacs so I need some help I got the thx AAA 789 and heard a dac would be help full so I ordered the focusrite scarlett solo (3rd gen) because it also had an xlr input (or out put idk pls correct me) for my microphone. and I also bought a (https://www.amazon.com/gp/product/B072C78Y57/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1) so I can connect my Thx AAA 789 to my dac I connect my Headphone which is a 3.5 mm jack a (sennheiser pc37x) to be exact and I can't hear anything from my headphone can anyone help me on where I went wrong? Also I opened the sound playback panel on my computer and it seems like sound is coming about but I just can't hear it?
Auver
0
Oct 26, 2020
Did you make sure to download and install the latest focusrite drivers and select the focusrite interface as the audio output? If you wanted to be able to monitor your microphone input in real time and get your desktop audio output simultaneously, you would have to run a cable from the headphone monitor output on the front to an input on this amp. I believe the cable you linked should would work when you plug the 1/4 inch TRS end to the headphone output on the interface and then plug the XLR ends into the amp. As the scarlett interface has both a DAC and an amp, please gain stage properly between the two so you send a properly leveled audio signal to your amp from the interface and actually get the benefit of using this amp. You can also use the two line outputs on the back of the interface and route those to your amp, but you wont get real time audio monitoring of your microphone input (which may be what you want if you are using speakers as well as headphones so as to not get feedback). However, I feel like pairing this interface with this amp is not a great idea if you are trying to achieve the great sound quality this amp provides. The focusrite scarlett interfaces all have DACs and amps built into them, as that is what is needed for a standalone interface. The amp on the scarlett interfaces is not very good. The DAC and ADC are both good for the price, but I can't help but feel like using a $300 amp with a ~$110 DAC/amp is not utilizing the THX 789 to its full potential. But you can use it however you want, just giving my 2 cents :)
chocobar091
0
Oct 26, 2020
I do believe that only a 110$ dac would not bring out the full potential of the amp however the whole reason I bought the THX 789 was because of its price. If there is any dac that you would recommend I would like to see and maybe save as maybe an upgrade for the future. I am still having trouble with the connecting the dac and hearing sounds from the THX 789 I might have some gist of what I did wrong. #1 I pugged the double xlr to 1/4 adapter in the front of the dac instead of the ones in the back? #2 I bough a double xlr to a single 1/4 instead of getting 2 two pairs of xlr to 1/4 adapters. #3 When I'm in the Focusrite software I see the microphone settings which are in the input settings. But In the Output Routing settings it states "output routing is not supported on this device" which makes me think that maybe my focusrite scarlett solo (3rd gen) isn't compatible with the THX 789? #4 my Headphone is an 3.5mm cable not an 1/4 inch which means I need to get an 3.5mm to 1/4 adapter Going back to the idea that I'm trying to save some money I would try all these other options but I can't simply afford them so can you confirm that if any of these might be a problem and a solution to fixing my problem before I waste moneys on more items that are irrelevant to the problem.
Szhchen
23
Oct 17, 2020
My volume knob is almost dead. Does anyone know what model is used in THX 789? 10k 50k?what kind of shaft could it be? And how to remove the knob from the shaft? There is no screw on the knob.
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(Edited)
Stealthbushido
35
Oct 15, 2020
What's the "Rule of thumb" as far as the gain stages are concerned? I hear a lot of talk about how you really shouldn't use 3rd gain. Can anyone give me more spacific details / reason's ect? Thank you for your time. ❤️ I love this community! 🤘
Michael-Q
194
Oct 19, 2020
My response would be to use the lowest gain that produces the volume you want to listen at. For the most part it's safer you won't blow out your ears accidently and it also gives you more finite control with the volume knob. If you're hooking up to a noisy source, using higher gains just amplifies that noise even more. Even if you can't hear that noise, you're still making it technically worse by using a higher gain. Personally though other than the safety concern I don't see an issue with always using the highest gain if you know your system is essentially transparent. Sometimes I hear of people using the highest gain to avoid clipping... these people don't understand what the gain does. If anything you're more likely to start clipping by using a higher gain. Clipping happens when the output voltage wants to go higher than what the amp can produce. Gain usually is a gain for that output voltage while the max voltage an amp can produce isn't affected by the gain you choose. So smaller gains means less likely to hit too high of a voltage that would cause clipping.
(Edited)
Hey I am curious if anyone else has this problem. After having my power supply plugged in for 2 days, it seems that it is now making a hissing noise, after unplugging it, it continued to hiss and stay lit up for about an extra min or 2 before finally shutting off. IS this a common thing I should expect? or may something be wrong.
Stealthbushido
35
Oct 2, 2020
According to the user manual. If you are using either of the se headphone ports and not the balance port you are only getting a 1/4th of the power?
Stealthbushido
35
Oct 2, 2020
That would explain why I'm on 3rd gain & pretty much max volume. 😂 Sounds good but can't wait to hear what it sounds like when the balanced cable's I ordered arrive.
Michael-Q
194
Oct 2, 2020
I fear for your ears lol.
pl_svn
13
Oct 1, 2020
hi is anyone powering his 789 with an LPS? just finished building a 24v/4A σ11 LPS but... this amp doesn't work with it: no sound! (just some very faint distorted stuff at max volume) :-0 yes: the LPS works fine with everything else @24v I tried :-/
Stealthbushido
35
Sep 29, 2020
Shipping date keeps changing. 😩
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Did you make sure to download and install the latest focusrite drivers and select the focusrite interface as the audio output? If you wanted to be able to monitor your microphone input in real time and get your desktop audio output simultaneously, you would have to run a cable from the headphone monitor output on the front to an input on this amp. I believe the cable you linked should would work when you plug the 1/4 inch TRS end to the headphone output on the interface and then plug the XLR ends into the amp. As the scarlett interface has both a DAC and an amp, please gain stage properly between the two so you send a properly leveled audio signal to your amp from the interface and actually get the benefit of using this amp. You can also use the two line outputs on the back of the interface and route those to your amp, but you wont get real time audio monitoring of your microphone input (which may be what you want if you are using speakers as well as headphones so as to not get feedback). However, I feel like pairing this interface with this amp is not a great idea if you are trying to achieve the great sound quality this amp provides. The focusrite scarlett interfaces all have DACs and amps built into them, as that is what is needed for a standalone interface. The amp on the scarlett interfaces is not very good. The DAC and ADC are both good for the price, but I can't help but feel like using a $300 amp with a ~$110 DAC/amp is not utilizing the THX 789 to its full potential. But you can use it however you want, just giving my 2 cents :)