Massdrop x THX AAA™ 789 Linear Amplifier - Impressions Thread
Dec 27, 2019 at 11:48 PM Post #1,908 of 2,613
At this moment im powering mine with a teradak dc-30 LPS. What i like about this LPS is the adjustable voltage. I actually stumbled on learning this amp could deliver 24V by accident. Ive adjusted it down to 5V but up to 24V was surprising.

Imo there is more definition and impact on lower frequencies but i cant be too sure on what exactly is happening. I just prefer it over the stock smps, simply.

Looks great together. I am looking at the 24V, 2.1mm LPS from Teddy Pardo. However, it is basically the same price as the amp. For a few more % of dynamic range I am not sure it is worth it. I will check out the Teradak. Appreciate the heads up.
 
Dec 28, 2019 at 1:02 AM Post #1,909 of 2,613
@geoffalter11 Just a heads up, there are a few Teradaks out there and with different PCBs.

This is the exact one I bought that I'm using with my 789. To my knowledge this red is the latest model.
https://www.ebay.com/itm/TeraDak-DC...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

This is the very first one I ordered, but the picture displayed with the RED PCB is not the one I got. Instead I got one with a yellow PCB and has 6 tall capacitors.
https://www.ebay.com/itm/hot-sale-T...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

I replaced the capacitors in both of the Teradaks. Anyway, I think it's important to contact the ebay seller to know the model you're getting, and to the best of my knowledge it would be good to get the one with the red PCB and 4 capacitors.
 
Dec 28, 2019 at 1:25 AM Post #1,910 of 2,613
Ooh, $350 for a headphone amp that was going for double on the aftermarket? Good deal...
 
Dec 28, 2019 at 3:03 AM Post #1,912 of 2,613
is there a trick to doing this? I clicked buy and saw no discount.
Shoul've
@geoffalter11 Just a heads up, there are a few Teradaks out there and with different PCBs.

This is the exact one I bought that I'm using with my 789. To my knowledge this red is the latest model.
https://www.ebay.com/itm/TeraDak-DC-30W-TOUCH-DC12V-2A-Hi-Fi-For-Audio-Linear-Power-Supply/132944572377?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

This is the very first one I ordered, but the picture displayed with the RED PCB is not the one I got. Instead I got one with a yellow PCB and has 6 tall capacitors.
https://www.ebay.com/itm/hot-sale-TeraDak-DC-30W-12V-1-5A-FPGA-Linear-Power-Supply/263415686881?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

I replaced the capacitors in both of the Teradaks. Anyway, I think it's important to contact the ebay seller to know the model you're getting, and to the best of my knowledge it would be good to get the one with the red PCB and 4 capacitors.
Thanks for the advice. I will look into on Ebay and contact the seller.
 
Dec 29, 2019 at 1:56 AM Post #1,916 of 2,613
@geoffalter11 Just a heads up, there are a few Teradaks out there and with different PCBs.

This is the exact one I bought that I'm using with my 789. To my knowledge this red is the latest model.
https://www.ebay.com/itm/TeraDak-DC-30W-TOUCH-DC12V-2A-Hi-Fi-For-Audio-Linear-Power-Supply/132944572377?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

This is the very first one I ordered, but the picture displayed with the RED PCB is not the one I got. Instead I got one with a yellow PCB and has 6 tall capacitors.
https://www.ebay.com/itm/hot-sale-TeraDak-DC-30W-12V-1-5A-FPGA-Linear-Power-Supply/263415686881?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

I replaced the capacitors in both of the Teradaks. Anyway, I think it's important to contact the ebay seller to know the model you're getting, and to the best of my knowledge it would be good to get the one with the red PCB and 4 capacitors.


Out of curiosity what power cord did you use to connect the LPS to the rear of the THX amp? Also how did you "dial up" a 12V LPS to 24V? Wouldn't it be safer to purchase the TeraDak DC-200W, that is spec'd at 24V, albeit quite a bit more expensive of course.
 
Dec 29, 2019 at 2:13 AM Post #1,917 of 2,613
I have a new account that hasn’t purchased anything (new members get $20 off), i don’t see the discount. If i log into my other account that isn’t eligible for the $20 discount i do see the $50 off.

I had the same question. If you read the fine print it appears to be 20 off Drop Studio items rather than anything on drop.
 
Dec 31, 2019 at 5:16 PM Post #1,918 of 2,613
is there a trick to doing this? I clicked buy and saw no discount.

I got an email from Drop about this; the reduced price is a special offer for “new HD 6XX owners only.” I’m not sure what constitutes a new owner but I purchased the HD 6XX from them in late December 2018 so it was within the last year.
 
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