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How long should I let the tubes burn in on this? And do I need an Audio signal running through or can I just leave this on overnight?
I've bought this like ages ago. But used it once and threw it in a box till now. Why? There was an annoying hiss that wouldn't go away. So if you have this give the main board a nice wash. Seems like some flux on the main board causes that. What you are left with is a sound that is shifted towards the bass end.
I just got my replacement tube, and noticed that I also now have 2 gold lion tubes. They're both the ECC82. Question though, one has "15 02" on the front of the glass, while another has "14 02". What's the difference?
pink401k
Not 100% positive, but date code maybe? Just got my replacement today also, and now have 2 gold lion tubes from this drop. Thanks Massdrop! Both of my tubes say 15 02 on them. I believe that to be year and month.
The Gold Lion Custom Tubes are in and have already started shipping out! All domestic orders should be shipped out by tomorrow. For the international orders, we need to adjust down the value of the package so that everyone is paying the accurate duties. These orders should ship out by the end of the week.
missing the stock tube upon delivery... Has Gold Lion installed, but was meant to arrive with the stock tube as a spare??? Plus this thing looks like a refurb... old scratched up parts....
$10 DAC mod. I just used a cheapo PCM2704 board I had laying around for fun, but it actually sounds half decent with this amp. If you got the ODAC PCB I am pretty sure it could be mounted within the footprint and it would be pretty much ideal. The RCA become DAC outputs if you use the 3.5mm input like I did here.


Interesting little circuit.

This is my first and last massdrop. I asked this question about the Gold Lion tube, got no answer and now the damn tube wasn't included in the shipment. There is still no update when the Gold Lion tube will be shipped. I will be filing a paypal dispute because this is bullshit.
kawada1
Did you check the tube installed in the amp? Mine was the Gold Lion, so I was only shorted a cheap crappy Shu Guan tube.
To all those who think they did not get the Gold Lion tube, check the one installed in the amp! I recieved mine today, and while it did not come with a spare tube, the tube installed out of the box is in fact the Genelex Gold Lion. So I am missing out on a crappy no-name 12AU7, no big deal.

So far I have only used this with my Dr.Dac3 as a source, which I know, using an HPA as a source for an HPA isn't how you're supposed to do it, but should work fine as long as I keep the input volume level under the distortion threshold.

Don't really notice much of the "tube character", but considering the amp is setup to use the tube as a buffer rather than the power amp stage I am not too surprised (I haven't reverse engineered the circuit yet, but I would guess it is setup as a cathode follower). Plus, all that really means is that it is NOT adding much distortion (which is really what "benefit" tubes have, distorting your signals). With that said, it does sound very good, and has no problem driving my AKG K7xx or BD DT880 600 Ohm.

I would guess much of the quality, or lack thereof, from the sound out of this will be down to the source you feed it, with a clean input I am getting a clean output, and no buzzing or hissing even at full volume with the AKGs (dont have any IEMs handy, will try later).

My only complaint is purely aesthetic and my opinion only, which is the blue LED under the tube. I would rather just see the very slight orange glow from the actual heaters in the tube, plus blue doesn't match my setup. Like I said, purely my opinion only, and I already plan to de-solder the LED to fix that anyhow.
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No worries, I thought I didn't get it at first too, then I went to check what tube it came with because I had forgotten and saw I had the Gold Lion already in the amp.

In terms of other upgrades, there really arent any other easily swappable components. The power supply could help if the standard one is really noisy, I will throw it on the scope when I get home to find out, but i have a feeling it is fine, plus they have one hell of a decoupling cap which should eliminate most if not all ripple. So probably not worth it, even if it was only $5, but I will check. I'm not really an audiophile either (audiophool, no offense guys), I'm an engineer who likes to listen to music and play with electronics, so I'm sure some will disagree with me and claim that a better power supply revolutionizes the outside the box synergy and unlocks the full depth of sound, or something like that.
Measure less than 5mV of ripple on the included AC-DC supply on my scope, plus they have a massive 6800uF decoupling cap on the amplifier PCB, so really no reason to change out the power supply. I would say there are probably no other upgrades that are worthwhile, unless you just want a linear supply to be more "vintage", but considering the housing is laser cut acrylic and it has a bright blue LED under the tube, I don't think this amp screams "vintage"
It has been brought to our attention that the Gold Lion Custom Tubes were not included in the shipments that recently went out. We apologize for this inconvenience, but there was a mix-up at our vendor's warehouse and the tubes were not packaged with the amplifiers as instructed. We have already reached out to the vendor to get these tubes delivered to our warehouse. Right now, we are just waiting on an estimated time of arrival and will check back in with everyone once we get some hard dates.
Didn't get the extra tube, either. Like i said, this was the only reason i ordered here and not Amazon. I expect Massdrop to send me the tube or I'm returning my amp and/or filing a dispute with paypal. Everyone please contact Mass about your order.
"To get the most out of your Bravo V2, we're including a Gold Lion Custom Tube with every order. Bringing you a dead silent output at low volumes and enriching your sound when cranked up, the Gold Lion hits the full range with smooth tones and great gain." Did not receive this tube, extremely disappointed in Massdrop! I hope they intend to fulfill this or i will never use this site again. I will also advise others not to use this site.
Exciting news, group! We’re happy to report that all of the orders have been shipped out and are now on the way to you! Please allow 24-48 hours for tracking to get into the shipper's system and start updating.

If there’s anything else we can do to make your Massdrop experience better, feel free to contact us via “Contact Support” button in your transaction page: https://www.massdrop.com/transactions
Does anyone from mass actually answer questions or do you just ignore them? At least two people have asked for confirmation on the gold lion tube, which is the only reason I ordered here. So what's the deal? Is it included like it says in the description or not?
I did not receive the additional Gold Lion tube in my shipment. Is it shipping separately?
Our warehouse team just received the bulk shipment this evening! All that’s left is to break the order down and prepare your individual orders for shipment. We are aiming to get everything out the door by Thursday. Once everything is shipped, tracking confirmation emails will follow.

Expect an update from us by the end of the day Pacific Time on 1/27 or sooner if something comes up.

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