Massdrop x Eddie Current ZDT Jr.
Massdrop x Eddie Current ZDT Jr.
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Product Description
With great control of the entire frequency range and a far bigger sound than its small size suggests, the Massdrop x Eddie Current ZDT Jr. rivals tube amps in the $1,500 category Read More

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JimDijkstra86NL
2
Apr 14, 2020
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Another drop on this one please. Got 5000+ interested folks of the price is low enough.
Apr 14, 2020
Tex1954
84
Apr 21, 2020
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Your best chance at a amp similar is this. Other than that you might be able to pick one up second hand. https://www.superbestaudiofriends.org/index.php?threads/shortest-way-sw51-amp-impressions-simple-set-amp.8042/page-12
(Edited)
Apr 21, 2020
dncnexus
79
May 13, 2020
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Unfortunately the owner of Eddie Current is shutting down shop so I don't think we will ever get another drop of these. I am also lookin for one, but will need to try and find a used one.
May 13, 2020
WildChinoise
235
Feb 8, 2020
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Starting the tube rolling adventure. I think the stock 6ZH1P provided lots of low end bass, which bled a little bit into the mids. The bass and the low mids sometimes were a bit bloated/muddy. Just a bit, but it bothered me sometimes. The treble was harsh and piercing/sibilant enough, that sometimes I turned the volume down a bit. The stock tubes also seem noisy. I hear random static noise artifacts. I do listen at higher volumes than most people. I like the ZDT Jr, but I did expect to swap tubes and explore all those other tubes out there. ATM, I've installed Western Electric 6AK5 NOS vintage tubes. Less than ten hours in on these tubes, so they are probably not all the way burned in. The WE 6AK5 provides a much improved sound over the stock tubes. There is slightly less bass thump. The bass is equally extended, but more detailed and less one note thumpy. Male vocals are clean and clear. Gone are the bloated and muddy low mids. Upper mids and female vocals are also clearer and detailed. Its easier to hear the different voices in a KPop girl group (LOLS). With the stock tubes, the voices kind of blended together and they were hard to tell apart. The treble is a bit more extended, more detailed, without harshness or sibilance. I can listen at really high volume level without feeling that my ears are getting stabbed with a forks. Quickly, I think sound stage is wider, maybe deeper. Imaging is pretty decent, but my favorite music is not so demanding in that way. There are less of those random noise artifacts. I am thinking that rolling the 6N24P might be more helpful in that regard. It does seem to be harder to find 6N24P equivalents. I did buy some more of those Russian NOS tubes, just to have backups in storage. Listening to a pair of Massdrop X Sennheiser HD 6XX headphones, on the Hi Z output, the volume knob was sometimes over at the 2-3 PM position for some songs. The 6XX became exciting and dynamic. There is some decent bass and the treble is more lively and more extended. I had always felt the 6XX was rolled off and were just a dark, dark headphone. I guess those comments about 6XX being hard to drive are very true. My recently arrived EMU Teak, (low Z output) sound really good with the ZDT Jr. I usually have them on 9-10am on the volume dial. But I find that the Fostex family (TH-X00 Purpleheart, Ebony, Emu Teak) just sound good with everything. Overall, the ZDT Jr has a very energetic and dynamic presentation with the WE tubes. All in all I would definitely recommend rolling a pair WE 6AK5.
Feb 8, 2020
HAL__9000
8
Feb 6, 2020
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Does anyone know what a fair price would be to sell one of these on the secondhand market? Assuming it's in perfect working order?
Feb 6, 2020
Tex1954
84
Feb 9, 2020
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It listed for 400 so I wouldn't pay much more.
Feb 9, 2020
rmjones25
0
Feb 6, 2020
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Bought one second-hand and enjoyed it for a few weeks. Then it quit powering on (caps were charged, LED not turning on). I traced it back to a short in the circuit board. After drilling that out, I'm still having problems. Anyone have any ideas on what the main transformer output voltages should be? I think that might have fried due to the short.
Feb 6, 2020
Tex1954
84
Feb 9, 2020
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I would join the SBAF forum and ask. It actually might've been discussed though. https://www.superbestaudiofriends.org/index.php?threads/massdrop-x-eddie-current-zdt-jr-official-thread.5408/
(Edited)
Feb 9, 2020
Gurbakhshish
192
Jan 14, 2020
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Mine works a lot better once i switched 6N24P with an ECC89. ECC89 is much cleaner tube when it comes to noise or microphonics at a cost of slightly lower amplification but this amp has ton of power so now instead of being under 25% i am at 35%on the volume knob
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BTW i have the original one with humming which goes down with this tube as well
(Edited)
Jan 14, 2020
tinamou62
75
Jun 15, 2020
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Thanks! I somehow have never noticed that screw.
Jun 15, 2020
GideonWoo
12
Jun 21, 2020
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Anybody have any extra ECC89 tubes they would be willing to part with (I'd ideally like to buy 2 pairs, one for now and one for spare)? I've been looking all over the internet for them and can't find anything other than the Mullard ones that cost quite a bit (and they're all shipped from EUR so the cost of shipping is also crazy).
(Edited)
Jun 21, 2020
Lyer24
36
Dec 26, 2019
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ZDT Jr. died randomly while playing music, doesn't seem to be outlet or power cable issues since those all work as normal with other amps I have lying around, leading me to suspect something went poof within the ZDT Jr. itself. Not sure about warranty as this is one of the earlier units (searching for receipt), but any recourse available for unfortunate morons such as myself, @Drop?
Dec 26, 2019
komashita
7
May 9, 2020
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Hi Lyer, did you managed to find out the cause of the blown fuse? I had the same problem. Replaced and blown again.
May 9, 2020
Lyer24
36
May 9, 2020
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Nope, plan to send it off to a competent technician as soon as I'm able, which is going to be after quarantine lifts here... whenever that might be.
May 9, 2020
fungxkevin129
16
Dec 2, 2019
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Hi, I am wondering if anyone is pairing the ZDT Jr. with the Airist R-2R Dac? In the description, it says the ZDT Jr. handles input voltage: 0.25–2 V, while the Airist outputs 2.5V. Will this result in any clipping/distortion problems? Thanks a lot!
Dec 2, 2019
Tex1954
84
Dec 7, 2019
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Add a HD6XX & that's what I listen to a lot. No clipping or distortion. I use a squeezebox player and LMS server it works great. I would recommend the Artist R-2R with the ZDT Jr.. You might read klyrish mid page. https://www.superbestaudiofriends.org/index.php?threads/massdrop-x-eddie-current-zdt-jr-official-thread.5408/page-41
(Edited)
Dec 7, 2019
roylan101
5
Oct 23, 2019
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What does a white dot next to the serial number mean?
Oct 23, 2019
mbvjmc
121
Oct 28, 2019
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From what I read, it appears to indicate that your amp came from a newer batch that supposedly fixes the humming issue.
Oct 28, 2019
SmoothDistortion
24
Oct 22, 2019
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Will it ever drop again? I really don't want to buy one used.
Oct 22, 2019
SmoothDistortion
24
Oct 17, 2019
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How would I took this up to my JDS OL dac? Currently have the dac hooked up to an Atom via RCA connectors. Also I have a Mojo. Anyone know how to use that with the Atom?
Oct 17, 2019
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