cotdt
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Posts posted by cotdt
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hehe... I guess we all figured out how that turned out. I'd love to put the Apache up against a beta 22
i have. long story short i don't think any SS amp can beat the Beta22 (as far as my own tastes go), but the Apache does offer the RSA house sound just like the SR71 portable amp. it has a thick, palpable midrange that can be pleasing depending on the music.
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i compared gold-plated versus silver-plated headphone plugs. didn't notice any difference.
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here's mine: putting a donut-shaped magnet (like a speaker magnet) around your power cable changes the sound.
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that's terrible, hYdrociTy. you sure it can't be repaired?
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On the other hand, though, it seems as though one has to price high enough in this hobby that people think you're selling a quality product. Over at head-fi, at least, I've gotten the impression that some folks genuinely like buying expensive products.
Ha ha! That's very funny, but very true.
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they charge quite a bit for such simple and cheap mods
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in all the amps i've heard, balanced sounded more transparent than single-ended. the 3-channel active ground does lower output impedance, but does nothing for slew rate. full balanced is the way to go.
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come back to head-fi and wreak havoc
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i'm using the default transistors, and it's warmer and more natural sounding than the Gilmore V2SE.
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M^3 is warmer. the Dynahi and Beta22 are even warmer. the CK2III is also a very good amp and very easy to build, but yeah the M^3 is warmer. i prefer the CK2III personally.
all the FET-output amps i've heard are quite warm, while the BJT-output amps can go either way.
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happy bday!
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I'm using Goldpoint SA taken from other projects long gone. The estimated parts cost is about $1200-1500ish, I'm not sure I haven't been keeping track on this particular project, plus some of it is stuff I had on hand.
Reterminating the D5000 was cake...but I think I'm going to get some Mogami cable and recable them too. Apparently it's pretty good cable....
i used Mogami for my balanced K701s, and it is very good cable. it should work well with Denons also.
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try disconnecting earth ground
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3dB or 6dB of attenuation is not enough and will only give very slightly more play on the volume knob. You need maybe 10-20dB of attenuation if 9 o'clock is already super ultra loud. This works very well, and cheap (just a couple resistors):
http://goldpt.com/mods.html (under Pre-Attenuation)
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Hey, can someone explain to me in kind of layman's terms what makes the Beta 22 so awesome? When I say kind of layman's terms I mean I have a basic understanding of things like output impedance and wattage etc.
I'm just not a DIY'er or anything, all I know is suddenly everyone is building these deuce deuces and saying they are the bee's knees.
everyone has their own theories. in measurement terms, i think it is the low transient intermodulation distortion (not the same as intermodulation distortion) obtained from the high slew rate, so that the sound is very accurate in the time domain. i think it is responsible for the punchiness, warmth, speed, transparency, and soundstage. it measures well in other aspects too, like output impedance, harmonic distortion, wattage, but i don't beleive those are what sets it apart.
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I'm also using the balanced Beta22 but I prefer the dual 3-pin XLR connectors because it is the Headroom standard:
At meets all the other balanced amps will be dual 3-pin, so for me it is more logical. BTW I really HATE the stock shoelace cable, so I made a new cable and installed it. Only took about 10 minutes and $20.
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I saw a recent news article on the Teletoobies, my favorite show a some time back:
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if you go to Japan, you can get a brand new Denon D2000 for $220.
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glad it works, earl! i'm going to try changing the Doge circuit on my amp, but i think eventually i'll sell my Doge to build myself a Push-Pull EL84 (Red Light District by SY) with a better transformer and LED biasing.
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So who made the 2A3 amp? Do you have the schematics?
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Do you know if it's an integrated or a poweramp?
I really dislike having a preamp in the signal path right now.
just add a volume pot and it's an integrated amp.
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I can only hope he comes over here so he tells us more. I doubt even the best solid state is doing the K1000 justice.
Yeah I agree tubes would be the ultimate combo with the K1000. Here is how Roam described his amp:
Transformer volume control to WE437A to interstage transformer to 300B to output transformer. Somewhat similar to this [link to Thorsten's 300B schematics], but the operating points and parts of the circuit are different. The interstage transformer is also switchable between 1:1 and 2:1.
Sound is the best I've ever heard, take all the strengths of a 300B and add speed, dynamics, and full frequency extension high & low. It's very vivid and alive sounding, that's probably the best way I can describe it.
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After the Doge thread was shut down by the mods, the good doctor has decided to derail my Woo6 vs. Doge A/B comparison thread:
http://www.head-fi.org/forums/showthread.php?t=241432
This time I will not be letting his nonsense go unanswered! I sincerely hope that the mods see what Art is doing and give him a strong warning.
DynaFet
in Headphone Amplification
Posted
Great! I got a ton of 2SJ109 & 2SK389 that I've stockpiled. I was going to throw them away, but now I've got a project for them.