Bravo V2 Headphone Amplifier
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Bravo V2 Headphone Amplifier
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Product Description
Despite appearances, you don’t have to shell out a small fortune for a high-performance headphone amplifier. Producers of some of the most affordable tube amps around, Bravo Audio packs an absurd amount of power into its products for the price tags Read More
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Brewgaloo
0
May 1, 2019
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I need a replacement power supply, does anyone have a suggestion? Or know the size of the tip?
Rapha
16
Jul 8, 2018
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Hi Guys,
I have the AMP and im quite fun of it. The only issue i have is a small hum that comes every couple of seconds. Can you please advise on how to get ride of it?
*I changed the tube to the gold lion.
I have the AMP and im quite fun of it. The only issue i have is a small hum that comes every couple of seconds. Can you please advise on how to get ride of it?
*I changed the tube to the gold lion.
ryanaeh
82
Jun 27, 2018
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I have one, fun little amp. I swapped out the capacitors for 35v Panasonics, the big power cap and two larger filter caps, haven't swapped the coupling caps yet. Seems to have made the tube glow brighter? I have a pair of new transistors to swap in, but I need heat sinks first as the new ones run hotter, and the existing sinks are already on the small side. All of this should improve the high frequency roll off.
Keep you cell away from it, no shielding means you get to hear every text you get before the notification or vibration lets you know.
Keep you cell away from it, no shielding means you get to hear every text you get before the notification or vibration lets you know.
public
139
May 19, 2018
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I had one of these and it had terrible interference in an office environment, ended up getting the FiiO E10K. I replaced the tube and liked the sound though. The plastic top came in REALLY scratched, makes you wonder about their quality control.
It looks cool, but there's no shielding which is pretty dumb.
It looks cool, but there's no shielding which is pretty dumb.
sucram65
48
May 19, 2018
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mine was picking up interference from a fluorescent lamp that was almost directly over my space at work. I found that just moving it a few inches eliminated the buzz. That being said, these are decent amps that deliver good power to your headphones. Just pair it with a decent DAC.
Icywolfe
137
Jun 26, 2018
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Just to try it try washing your board in rubbing alcohol or any other solvent for cleaning flux. Because my board that a hum and buzz for a while until I thought about just washing the board. And the hum and buzz just went away.
sucram65
48
Apr 30, 2018
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I bought one of these on Amazon so I wouldn't have to wait. It was only $8 more. My question is regarding a DAC. I'm using a Zorloo ZuperDAC that I picked up during the last drop. The question is what is the optimal way to use this combination. This is a setup for work so it did not have to be super high end. I have the volume turned up all the way on the ZuperDAC using my iPhone 6s Plus as the source. I only have to turn the volume nob up not even a quarter on the Bravo to get good volume output to my DT 770 Pro 80 ohm cans. Should the ZuperDAC only be at 1/2 volume since it has an amp also built in. Or should I get a DAC without an amp? I'm new to this stuff. I'm also going to try this out with Massdrop HD6xxx, and Hifiman HE-400i, and HE-560's.
misterman14
50
Apr 25, 2018
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If you like this form factor check out the originals at Garage 1217. They are pricier but also better as they are adjustable for whatever headphones you choose.
Nosiris
0
Apr 25, 2018
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These Bravo amps are great fun but two quick bits of advice to potential buyers: Throw out the stock tube and get something half decent, or even better: spend a little more and get the Bravo Ocean instead; it's really worth it. (And then also throw out the supplied tube and get something better).
rongon
42
Apr 23, 2018
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I was thinking of building a headphone amp based on a circuit like the one on which the Bravo V2 is based. Being kind of lazy, I just bought this version of the Bravo V2, instead. I'm comparing mine to an original version Objective 2 amp, which I built up from a PCB I got directly from NwAvGuy.
So, what do I think of this Bravo V2?
1) Its output impedance is too high. It loads down trying to drive my Fostex T50RP headphones with 60 ohm impedance. Driving those 'phones, the Bravo gets 'gnashy' sounding. Harsh highs, rubbery bass. It sounds kind of 'electronic.' However, driving my Sennheiser/Massdrop HD6XX 300 ohm headphones, the sound from the amp becomes acceptable. It's still a bit more harsh and electronic sounding than if I use the O2 instead. But at least it sounds on par with a typical PC laptop's headphone output when driving higher impedance headphones. That's a pathetically low bar to clear...
2) I'm not having any noise or channel imbalance problems. Mine seems good.
3) I expected the Bravo to sound mushy and 'tube-y.' Instead it sounds 'harsh,' even when driving high impedance headphones. I haven't tried any different 12AU7 tubes in it, which I will do. But unless the supplied Chinese-made 12AU7 is an utter piece of crap, I don't expect a different version 12AU7 will fundamentally alter the annoying sonic character of this amp.
I figure the amp is worth the cost of its constituent parts. At some point I'll try some of the mods people have suggested. But if you're shopping for a 'keeper' of a headphone amp, ignore this.
I'm still happy with my O2, so if an Objective 2 comes up as a drop again, I'd recommend that. This Bravo V2 doesn't sound anywhere near as good as the O2. Not even close. Sorry.
So, what do I think of this Bravo V2?
1) Its output impedance is too high. It loads down trying to drive my Fostex T50RP headphones with 60 ohm impedance. Driving those 'phones, the Bravo gets 'gnashy' sounding. Harsh highs, rubbery bass. It sounds kind of 'electronic.' However, driving my Sennheiser/Massdrop HD6XX 300 ohm headphones, the sound from the amp becomes acceptable. It's still a bit more harsh and electronic sounding than if I use the O2 instead. But at least it sounds on par with a typical PC laptop's headphone output when driving higher impedance headphones. That's a pathetically low bar to clear...
2) I'm not having any noise or channel imbalance problems. Mine seems good.
3) I expected the Bravo to sound mushy and 'tube-y.' Instead it sounds 'harsh,' even when driving high impedance headphones. I haven't tried any different 12AU7 tubes in it, which I will do. But unless the supplied Chinese-made 12AU7 is an utter piece of crap, I don't expect a different version 12AU7 will fundamentally alter the annoying sonic character of this amp.
I figure the amp is worth the cost of its constituent parts. At some point I'll try some of the mods people have suggested. But if you're shopping for a 'keeper' of a headphone amp, ignore this.
I'm still happy with my O2, so if an Objective 2 comes up as a drop again, I'd recommend that. This Bravo V2 doesn't sound anywhere near as good as the O2. Not even close. Sorry.
pdalvares
0
Jul 3, 2019
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Hello all, first of all thank you for all the info about this amp and all the mods. I´ve made all the mods (changing the mosfets, changing the capacitors for high grade audio nichicons and other mods on this website rockgrotto.proboards.com/thread/11555/bravo-v2-modifications-2017) besides power supply filtering and some of them that are more complicated. The last one I did was the bias adjustment mod, replacing the 3k to 1k resistance and adding two 5k pots. But now I'm in a problem.
Is it normal that the tube filaments inside are like orange and really hot? I've left 13.5 V in the Bias adjustment.
The IRL530N is like super hot even with another aluminum dissipator. The LM317AT is like medium hot.
The major problem is with crosstalk and distortion. I´ve made the mod of crosstalk and with the right channel muted the music is perfect. However with the left channel muted I ear alot of distortion and leaking in the left and distortion in the right channel... I´ve already changed cables and tried to search online but I can't find a way to make it go off. I'm gonna attach some pictures for you to see what you think is happening:
ibb.co/GMYpd0W
ibb.co/GMYpd0W
ibb.co/k1MCWxn
ibb.co/cLdNrZp
ibb.co/4pMG2JT
ibb.co/Lk13Gsf
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ibb.co/LZtLVvn
ibb.co/GMYpd0W
ibb.co/k1MCWxn
ibb.co/cLdNrZp
ibb.co/4pMG2JT
ibb.co/Lk13Gsf
ibb.co/8m1z4Ts
ibb.co/LZtLVvn
(Edited)
rongon
42
Jul 3, 2019
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Sorry, I no longer have the Bravo V2 amp I bought way back when. It's gone.
If you want help troubleshooting, I'd recommend drawing a schematic that shows the circuit with your mods, and showing the voltages you measure at each node.
The 12AU7 heater should be as close to 12.6V as you can get. It's OK if it's a bit low, like 12V, but I wouldn't run the heater higher than 13V, as that would be likely to shorten the life of the tube.
As I wrote in my post, I found that no amount of modifications would be likely to make this design into a truly 'hi-fi' amp (in my opinion).
Good luck with this.
(Edited)
DareToBe
145
Apr 21, 2018
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This is pretty much just a toy for me. The sound is BAD for K7XX and HE400i (even worse than directly using my cell phone). I don't have 300 or 600 ohm headphones, so I guess my feedback is biased.
I'll probably use this to teach my son what is an AMP. LOL
I'll probably use this to teach my son what is an AMP. LOL
rongon
42
Apr 23, 2018
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I have a pair of Fostex T50RP cans that are 60 ohm impedance, and a pair of HD6XX that are 300 ohms. I've played them both through the Bravo V2 I just got. I can tell you that this amp sounds pretty miserable trying to drive low impedance headphones. It gets kind of bright and nasty sounding. It sounds acceptable driving the HD6XX cans, but not as relaxed and clean as my original-version Objective2 amp (built up from the original run of PCBs). I agree, this thing is a toy. Maybe I'll do some experiments on it or something.
DareToBe
145
May 12, 2018
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Update: I got a DUNU impedance adapter from ebay to add another 75ohm on top of my 35ohm HE400i. Now the sound becomes OK to me.
mdl1
0
Apr 11, 2018
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just received mine last week and tried it once and it had a huge amount of hiss in the background to the point of being UN-listenable especially at low volume. I saw something about burning in the tubes for a different brand but not sure that's what I need to do.
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