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Bravo Audio V2 Class A 12AU7 Tube Multi-Hybrid Headphone Amplifier
Can you explain the main difference between V1 and V2 apart from the different vacuum tube in use?
V2 is called "Class A - Multi-Hybrid" and V1 is stated as "Class A". What is the "Multi-Hybrid" aspect and how does it differ from the other version?
The V1 has bias adjustment pots on the circuit board which theoretically means you can use a wider variety of tubes in it, whereas the V2 can only use a 12AU7 tube. The V2 comes with a 6922, which some consider to be a better preamp tube. I find the 12AU7 to be perfectly fine. The tube used is predicated on the design of the preamp and either tube can be used to good effect in any particular design. Again, the V2 is designed for the 12AU7 only.Both the V1 and V2 are multi-hybrid meaning that they have a solid state input topology with a tube driven output stage.
Date published: 2013-12-25
ease of replacing the tube
People are mentioning replacing the tube will improve the sound. How easy or difficult is it to change out the tube?
Can you chand a light bulb ? If so thats how easy it is .just make sure you get the right tube 12AU7The tube just pulls out and to replace simply push the new tube in . Really is that easy
Date published: 2013-12-25
Can it handle 4 ohm loads?
Is there any precautionary advice against using this amplifier with headphones that have a minimum impedance of 4 ohms?
no never heard of 4 ohm headphones
Date published: 2013-12-18
How is the BRAVO V2 as a preamplifer only?
Anyone have experience with this as an AMPLIFIER only? Planning on hooking up an old onkyo m-5160 amplifier and using the bravo v2 as a preamplifier to power my arx a1b speakers. Also will changing the tube change the sounds of the whole product or will changing the tube only change the sound through the headphone amplifier output? THANKS!
The headphone amplifier is also a preamplifier. It is actually advertised by Bravo as being a preamp, too. I have been using it as a preamplifier with the APA150 and it does give it a "warmer" sound.
Date published: 2013-09-07
Bravo V2 as a studio tool for adding warmth or maybe even distortion?
Anyone think this would be a good tool to run live level signals through for adding a little bit of tube warmth to synthesizers and such?I also was wondering if this device distorts in a pleasant way when overloading the inputs. Would a 12AX7 add more gain for better stereo tube distortion?Thanks!
This is intended for use as a headphone amp so We would not recommend it for those applications.
Date published: 2012-12-25
Since I know nothing of tubes, one thing I remember is that they often blew in the older type TV's and radios. How often do you need to replace them?
My step dad ran an appliance/electronic repair service from the mid 50s through the early 70s so I grew up around tube stuff. I remember that rectifier and other power tubes were the frequent culprits in failures. They worked hard, ran hot, and eventually failed. They could also be damaged by other components failing. Next were amplifier tubes but the failure rate wasn't near as high as others. TVs also generally ran longer than radios and both longer than audio gear.The thing to remember is that the circuitry that controls/converts the power from the wall plug to the various voltages & currents a device requires for its circuits aways work hard. Heat can be a killer, too and tube gear got hot. A lot of audio tube gear is a clssification of Class A. Class A does the most faithful job of reproducing an analog signal into a higher output signal. But, it is also the least efficient in that it takes a bunch of power, generates a bunch of heat, etc. Really, all an amplifier is is an adjustable output power supply.When any power circuit started to go, everything else will be affected. A lot of people used to play guessing games and replace tubes on a whim when their device began acting up. Eventually they'd replace the right tube. Maybe. I remember drug store having tube testers for people to bring in tubes from home and check them. Some even carried a few of the more common tubes.Hybrids, like this amp, use solid-state -transistors, chips, and the like- to handle the power creation chores. Those are much more stable as in they basically work or not and don't really get 'weak' like tubes can. They take heat better, too, although they are prone to many of the same types of failures as tubes were.In this amp the audio amplification is done by the tube which in a headphone amp shouldn't be taxed very hard. -WARNING- DO NOT touch tubes both because some will burn you and the oil from your skin can cause problems!) The tube should last ages if it's used correctly and treated nice. It's a fairly common tube often used for the same application so should you ever need one, which I doubt, it shouldn't be hard to find.If it develops a problem, you'll know. Just make sure it isn't your headphones, cord/plug, or hearing! (grins on the last one!)
Date published: 2014-01-03