Ok where to start as there seem's to be a lot of miss-information here.....
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Don't melt Sunrise and Bravo/Indeed in terme of sound quality the Project Sunrise is one or two step above any Bravo/Indeed, even when intensively modded at its best...
Comparing a Bravo and a Sunrise is like comparing the cheapest Little Dot Vs a Woo Audio WA6, it's not really the same category.
The Sunrise, Bravo, Indeed are all based on the same class a 12AU7 circuit with the original Sunrise a bit modified taking into account of no limitations and skimping out on quality with price ratio.
The P-S is indeed a step above the Bravo and Indeed but with extensive modding and fixing the flaws of the circuitry of the Bravo and Indeed where they skipped out due to cost on the Bravo and Indeed, the latter two are not very far off behind the Sunrise.
This is coming from someone who has built and modded over 4 Project Sunrise II amps, over a dozen Indeed G2, G1 and Bravo v1, v2 and v3 amp's.
There comes a saying you get what you pay for and this applies exactly to the Bravo and Indeed line of amp's. The Indeed G3 is almost neck to neck against P-S overall.
What else is disappointing is that I'm currently rebuilding my Bravo v2 in a full sized enclosure with a regulated 24v power supply, change of resistors, pot, hp / rca jacks etc to better parts to see how far I can take a $50 hybrid tube amp to. Measuring the cheap resistors used show alot of drift from my DMM away from it's original rated values which is obviously 1 factor to decreasing the sound quality as the rated resistance is all over the place.
As with Little Dot vs Woo WA6, that depends on which Little Dot amp you're talking about, the LD MK 1,2 and 3's are nothing special as evident from there prices, just for references, my LD MK VI+ wipes the floor compared to all the dynamic Woo amp's up to the WA5, an amp that cost 3.5x as much as my VI+, and they are both neck to neck on some area's of sound. There is also nothing special about Woo amp's except the cost you're paying is a good build and fancy enclosure, the circuitry are bog standard ones that have been around for decades modified from time to time, in this case a circuitry that Jack has thrown a bunch of fancy boutique parts thinking it will dramatically improve the sound of. Very much alike as some experience posters here saying Ray Samuals Darkstar amp is nothing but a hot rodded (fail infact) gainclone amplifier costing much less.
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The bravo really struggles when faced with headphones that are hard to drive, like the fostex t50rp or AKG k702s. The sunrise is putting out almost a watt in that range, and drives them with ease.
Tell me you're joking with this post? T50RP and AKG K/Q70X headphones are not hard to drive end of story. A bee's dick Fiio E5 can even drive the K702's, they don't need power, same can be said for the stock woeful T50RP's. If you're finding it hard to drive them, then it mean's you failed to mod your Bravo properly or have a broken unit, because I can tell you, these can drive 600ohm high z Beyer DT990 Prem's no problem or my LCD2's for that matter.
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That not true. You can set up the bravo to control biasing. I dont have the link in front of me but its on the rock grotto modding thread.
Indeed the Bravo can be modded for biasing, you need to remove the two small Rubycon caps next to the tube socket in between the volume jack, 1 trimpot for each channel. Rockgrotto has extensive information on the exact value of the trimpot you need.
