Massdrop CTH + SDAC DAC/Amp

Massdrop CTH + SDAC DAC/Amp

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Product Description
The Massdrop CTH + SDAC DAC/amp brings two of the community’s favorite designers together in one affordable, easy-to-use package. It features the Massdrop x Alex Cavalli Tube Hybrid Amp (or CTH), built from the ground up by the founder of Cavalli Audio—a legend in the world of headphone amps Read More

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Pennultimate
34
May 26, 2022
The disconnection issue sounds like a grounding issue. Has anyone disassembled this before? I can find pictures of a disassembled CTH but not one with the Sdac integrated.
aggftw
6
May 22, 2022
Hello! Getting back into my headphones hobby after not using my equipment for a few years. I have the CTH+SDAC from Massdrop and the 6xx. Plugged everything in but I'm getting no audio on the front jack. Back jack works, so I assume DAC/power is fine but I'm doing something wrong with the AMP. I've played with the input presses/extended and volume knobs and nothing... Tube lights up the way I remember it used to and gets hot. Any ideas how else I could fix this? Really missing using it these days. Thanks!
MSHarris21
1
Jul 23, 2021
Sound quality is great when it works. Audio shuts off periodically. Unplugging and re-attaching USB fixes issue, but it gets rather annoying to do this several times a day. Any suggestions?
rushton
1
Aug 10, 2021
I have been noticing this too. It seems to happen to me when swapping audio sources on my mac. I think there may be an issue with drivers or the sdac itself but I am not totally sure.
savageastr0naut
2
Apr 25, 2021
The rear audio jack works, which means the DAC is working. However, the front audio jack does not output sound anymore, regardless of if the input switch is pushed in or extended out. Therefore, I believe the AMP portion is not working correctly. IDK if the input switch is jammed or broken, resulting in the AMP portion of this product to be disabled, or what exactly is wrong with this product - but the AMP does not work anymore. The weird part is that it was working perfectly fine up until yesterday. TLDR - the AMP portion of this product is not working. If anyone has an idea for a fix, then please comment. Otherwise, I think the only other option is to see if Drop will send out a replacement unit... wish me luck.
pao_huawell
0
Oct 10, 2021
Totally the same issue. If anyone has the idea for a fix, please comment. Thanks!!
Airwtw
1
Feb 20, 2021
I’ve purchased this dac /amp and used it for quite some time with my Sennheiser 6XX. Recently picked up a pair of Meze 99 Noir as well, and with this pair of headphones there is a hissing that is constant whenever plugged into the headphone port. There is no hissing when plugged into the rear 3.5mm jack, I do not experience this hissing with the 6XX, and have tried multiple different cables. Anyone have any ideas?
(Edited)
Nochocheez
0
Apr 3, 2021
Just had this happen to me. I don't know a lot about audio gear compared to some other people, but the conclusion I came to was that the sdac was made for high impedance, reference headphones, like the 6xxs. The meze 99s are low impedance, meant for mobile hardware/low impedance amps/dacs. I'm guessing that's what causes the hissing.
Prosad
2
Oct 28, 2020
So mine started acting weird. If I increase the volume it stops working and comes back after a few seconds. thought I blew a tube but that doesn't seem to be the case. Check the wall wart and its plugged in correctly.
rastus
1319
Oct 28, 2020
Likely the tube is saying goodbye... they can fail in odd ways “vocally” before total kaputz... a nice NOS one will be upgrade from stock.
(Edited)
WillJC
0
Sep 16, 2020
I got this product 3 months ago and have been using it ever since. The sound is quite nice. However, just recently, connectivity issues start to occur. None of my devices can recognize the SDAC. Does anyone face similar problems? May I ask what are some possible solutions? Is it a hardware problem?
kisvari.david
3
Oct 30, 2020
Since I can't buy a spare SDAC card to replace my defective one I sent it to a guy who can hopefully repair it. If he suceeds I'll let you know. The most likely cause of this issue is that the AK DAC chip is dead, or in better case the output opamp is defective. We'll see (hopefully).
kisvari.david
3
Nov 18, 2021
Forgot to update: mine was successfully repaired by a local engineer, he replaced the AKM DAC and the voltage regulator circuit had issues too. Now it's working perfectly fine.
Tompie913
9
Aug 6, 2020
Is there any particular danger in using IEMs connected to the DAC output on the back? Unfortunately this is too noisy for IEMs (or really any easy to drive headphone) so for them I have been using the rear output which is more than powerful enough to drive most IEMs.
noom5150
2
Jun 22, 2020
Can anyone help? I have owned CTH+sDAC over a year, recently my unit cannot connect via USB on my laptop. Any advise, I also send email to support over a week but no reply yet.
WillJC
0
Sep 16, 2020
It also happened to mine. It all works fine previously. But the USB basically failed overnight. And I’ve tested it on numerous devices, so it’s not a problem of the socket.
malin.reindeer
14
May 1, 2020
Something I dont like and understand about the design: This is not a very small portable unit having micro USB inputs to save space. Why not USB A or B or C?
(Edited)
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