tourmaline
Headphoneus Supremus
- Joined
- Nov 10, 2003
- Posts
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Quote:
one more thing; did it cross your mind that they "intentionally" screw up basic designs to make it sound the way it does?! Like some really high end cables do?!
Thank god there's only one smart guy in town.
Again, i've heard alot, also amps of 50.000 and more but some don't sound that good at all! superieur design doesn't mean it's good at every aspect of sound, tonality is one of em and most fail, even very expensive amps!With the new couplers, the bada is much faster, has more drive and sounds much more detailed allready. With the other mod going on, it will take it even further! A world class high end amp should have correct tonality, speed, drive, stage, air and extended top and bottom with controlled bass! With the mods, the bada is creaping very close towards this ideal!The solens sound closed in with a very small soundstage!I urge everybody with a bada amp to get rid of the coupler and the signal solens as soon as possible and you'll know what the bada can do!(much more then roam is capable of thinking of!)
Originally Posted by Roam /img/forum/go_quote.gif I honestly don't have the time nor inclination to read through every single shoot-out and comparison along with trying to determine the viewpoints & biases of those writing the reviews. I'll just have to take your word that people have indeed rated the Bada PH12 over the other amps and that their opinions are honest and pure as fresh fallen snow. However, I do have the schematics for the Singlepower, Doge, and many other amps, and frankly they're nothing to write home about, and in the case of the Doge it's even more incompetant than the Bada. It does not take a world class designer to see the faults in the Bada & other amps, all of the design flaws are basic level fundamental screw-ups which even a neophyte can recognize after reading the first few chapters of Valve Amplifiers by Morgan Jones. It's not rocket science, it's basic tube theory. MOSFETs sound best when they're run wide open, which of course creates a lot of heat. To me it's not a concern, there's only one of them per channel so if & when it fails, replacement is simple & cheap. If the life of the power supply capacitors is a concern, then simple use caps rated for 105°C. The suggestion to re-use the Solen cap was made with interest towards keeping costs down while improving sound, a freebie if you will. If cost isn't a concern then chuck it and use whatever fancy capacitor pleases you. With regards to drastically changing cap values, I suggest familiarizing yourself with the simple formula F = 1/(2Pi * R * C) which determines the -3dB point of the bass roll-off. In the cascode stage, the -3dB point moves from 1.6Hz to 2.4Hz. This will have no effect on the circuit's performance, besides getting rid of the problems inherent with using an overly large cap, that being increased inductance, poorer overload recovery, greater leakage current, etc. The same applies to the coupling cap leading to the MOSFET, -3dB goes from about 1.5Hz to 3Hz, it's an inconsequential changes except for the superior properties of a smaller capacitor. This is all basic circuit design. Actually, I have. The fact that I didn't kick it across the room in disgust is a testament to how forgiving tubes are of epic design failures. All you've done is make blind parts swaps with boutique brands in the hope that it'll improve the sound. You've failed to look at the circuit, understand the circuit, know what it does and what's going wrong, and then addressed the root cause of the problems. One of my designs is in the DIY forum. As for my real name, past experience with insecure deranged audio nuts has led to a policy of keeping it to myself. My wife does not care to find another envelope in the mail containing rambling incoherent threats against me. |
one more thing; did it cross your mind that they "intentionally" screw up basic designs to make it sound the way it does?! Like some really high end cables do?!
Thank god there's only one smart guy in town.
Again, i've heard alot, also amps of 50.000 and more but some don't sound that good at all! superieur design doesn't mean it's good at every aspect of sound, tonality is one of em and most fail, even very expensive amps!With the new couplers, the bada is much faster, has more drive and sounds much more detailed allready. With the other mod going on, it will take it even further! A world class high end amp should have correct tonality, speed, drive, stage, air and extended top and bottom with controlled bass! With the mods, the bada is creaping very close towards this ideal!The solens sound closed in with a very small soundstage!I urge everybody with a bada amp to get rid of the coupler and the signal solens as soon as possible and you'll know what the bada can do!(much more then roam is capable of thinking of!)