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post #4861 of 7977
Thanks Jamie. Very handy.
post #4862 of 7977

There are also a lot of expensive aftermarket parts that sound absolutely terrible.  You can actually make a kit build a whole lot worse by spending a lot of money on boutique parts. 

post #4863 of 7977
Quote:
Originally Posted by audiowize View Post
 

There are also a lot of expensive aftermarket parts that sound absolutely terrible.  You can actually make a kit build a whole lot worse by spending a lot of money on boutique parts. 

Amen! Doc's stock Crack has a really good sound. Roll a couple of tubes, install the SpeedBall, possibly put a 0.01uF 250V film cap across the third electrolytic in the power supply. At this point it is way ahead of most tube amps out there.

post #4864 of 7977

my curiosity got the best of me, had to try the crack with Senn 6xx

 

got a question though, can I use the USAF 596 with the crack? do I need an adapter? thanks in advance

post #4865 of 7977
Quote:
Originally Posted by snapple10 View Post
 

my curiosity got the best of me, had to try the crack with Senn 6xx

 

got a question though, can I use the USAF 596 with the crack? do I need an adapter? thanks in advance

NO!  Not without major modifications, including adding another tube socket and modifying the power supply. The USAF 596 is a rectifier tube. Crack uses semiconductor diodes for this function in the power supply. The 6AS7 / 6080 used by the Crack is a power triode for signal amplification.

post #4866 of 7977
Thanks!
So much goes behind building amps/daps/DACs . I will stick to enjoying them
Glad there is always somebody to answer my questions smily_headphones1.gif
post #4867 of 7977

Do any of you have a problem with noise when the speedballs installed and 5998  tubes with volume right down ...volume at 0% ....

The 1st 5mm of volume travel  noise then  its ok after that ...dead silent.

 

I've had 4 5998 tubes now and all of them make a buzzing noise with the volume turned right down.

 

One of the tubes I had made the noise at all volumes so i sent it back, but now ive tried 3 more and all these tubes have the noise but only when volumes at 0%.
One of my new tubes the noise goes away after 30 mins tho.

 

I removed the speedball when I had the really noisy tube and it was perfect then . 
I have this same noise with other types of tubes but it always goes away. (Mullard 6080 perfect, noise for 3 seconds max,  RCA takes a bit longer , 2 RCA 6AS7G tubes takes a few mins.

 

A few other people are experiencing this on the bottlehead forums.

 

EDIT:  This problem has been fixed......The noise at 0%  Volume was a faulty batch of MJE350's Transistors .


Edited by lost&confused - 5/8/14 at 2:11pm
post #4868 of 7977
Quote:
Originally Posted by lost&confused View Post
 

Do any of you have a problem with noise when the speedballs installed and 5998  tubes with volume right down ...volume at 0% ....

 

Sorry you're experiencing issues.  I have Chatham 2399 (5998 variant) and haven't experienced this with my amplifier.  At one point I did have an issue with another tube (buzzing) that was alleviated with some Deoxit.

post #4869 of 7977
Yup, I've got the exact same issue with my freshly-installed SB. It seems common enough for me not to worry about it, although I did crap myself at first, especially when accompanied by a single pop! It's all settled down now, good as gold. 

My thoughts on the Speedball: Significantly faster, the upper mids and treble really snap and sizzle now, it's so lively. The soundstage and separation is noticeably better, I'm picking out even more details because the placement of instruments is more pronounced. Bass is cleaner and more taut but a little deeper. Listening to the Aphex Twin remix of 808 State - Flow Coma and that acid bassline is so rubbery and tight. There's just a vast amount of spatial detail on every element of the mix, insane. This isn't music you'd expect the HD650s to do particularly well because it's begging for quick phones but this is sick. Moving onto Earth, Wind & Fire - In The Stone (from 'I Am', one of my top reference records, an brilliant music, to boot). This is the sound of the HD650s in their comfort zone and absolutely soaring. The richness of the horns, synths and keys is amazing, the layered male vox are fantastic and the rhythm section sounds more alive than ever.

OK, gotta go listen.

Edit: Ugh...Weather Report sounds so damn good. So rich and colourful, that riff in Birdland is just like nothing I've heard before. This is really something. Ugh. Wish I could book tomorrow off work.

Edit 2: Animal Collective's Merriweather Post Pavilion is one of my favourite records of all time but I've always thought the production was so dense, it's almost a fault. No more. You can hear every layer of the harmonies, every burble and bleep and whoosh, the bass is tight and neat but it absolutely bumps. Best purchase I've made since the Crack itself. I was dubious, to be honest, but it really really is worth it.
Edited by grrraymond - 5/7/14 at 12:44pm
post #4870 of 7977

Thanks for the input guys...The noise is so annoying with the 5998 tubes I have tho.

With my other tubes all is fine tubes are warmed up noise goes away but I don't like the other tubes with the speedball :(

 

I use HD600's and with the speedball I found the sound changed..More detail but its brighter and not as much bass i think,  the 5998 tubes takes the brightness away some what and brings the bass back.

 

I'm Still undecided whether I like the speedball with the HD600's  , I can see why people would like the speedball with  650s tho  .....should never of sold my hd650s now :P

post #4871 of 7977
Quote:
Originally Posted by punit View Post
 

Funny thing is , I go to a lot of concerts  (been to Texas, Santana, Lionel Richie this month, Pet Shop Boys & Fat Boy Slim next week.....) & some times the sound set up is not that great & I actually go "Hmm... sounds better on my Headphones" :dt880smile: 

 

But even when your audiophile inner critic is irritated with the sound engineer for not properly tuning the Bass at a concert, nothing beats the communal sharing of passion & love for music with thousands of people at a concert.

 

Sometimes? Sometimes? Ugh. Most venue's are simply TERRIBLE.  Booze helps. A-lot.

post #4872 of 7977

No kidding. The last few shows I've been to sounded down-right terrible. It's like the loudness wars are creeping into the live theater now too. 

post #4873 of 7977
Quote:
Originally Posted by JamieMcC View Post
 


I ran mine with 47uf for a while and I know of one that runs 60uf pio. What type are you thinking of trying?

70 uF Obbligato Oil ,I  just don't want to loose bass ,I already have them and I'm pretty sure they will fit  with small HS "modification"

post #4874 of 7977
Yah, same problem. Only discovered it recently as I never turn the volume knob that far. SB,5998,hd 600's. Just the last few millimeters and a LOUD hum! Wonder what it is. Got some insight for us Doc?
post #4875 of 7977
Quote:
Originally Posted by grrraymond View Post

Yup, I've got the exact same issue with my freshly-installed SB. It seems common enough for me not to worry about it, although I did crap myself at first, especially when accompanied by a single pop! It's all settled down now, good as gold. 

My thoughts on the Speedball: Significantly faster, the upper mids and treble really snap and sizzle now, it's so lively. The soundstage and separation is noticeably better, I'm picking out even more details because the placement of instruments is more pronounced. Bass is cleaner and more taut but a little deeper. Listening to the Aphex Twin remix of 808 State - Flow Coma and that acid bassline is so rubbery and tight. There's just a vast amount of spatial detail on every element of the mix, insane. This isn't music you'd expect the HD650s to do particularly well because it's begging for quick phones but this is sick. Moving onto Earth, Wind & Fire - In The Stone (from 'I Am', one of my top reference records, an brilliant music, to boot). This is the sound of the HD650s in their comfort zone and absolutely soaring. The richness of the horns, synths and keys is amazing, the layered male vox are fantastic and the rhythm section sounds more alive than ever.

OK, gotta go listen.

Edit: Ugh...Weather Report sounds so damn good. So rich and colourful, that riff in Birdland is just like nothing I've heard before. This is really something. Ugh. Wish I could book tomorrow off work.

Edit 2: Animal Collective's Merriweather Post Pavilion is one of my favourite records of all time but I've always thought the production was so dense, it's almost a fault. No more. You can hear every layer of the harmonies, every burble and bleep and whoosh, the bass is tight and neat but it absolutely bumps. Best purchase I've made since the Crack itself. I was dubious, to be honest, but it really really is worth it.

 

Weather Report's mastering and production was SO good!!! Birdland is still one of my all time favourites.

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