Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Crack;Bottlehead OTL
New Posts  All Forums:Forum Nav:

Crack;Bottlehead OTL - Page 331

post #4951 of 5989
Quote:
Originally Posted by MattTCG View Post

I was there...I heard it...my mind was blown. eek.gif

Hmm all that sounds great but I can't imagine at what position you have volume on Crack set if Quickie already amplifies the signal. I have mine set at 8.00 and if I go lower I get channel imbalance.
post #4952 of 5989
I personally kept the Crack at 9 o'clock and used Quickie for volume control, which resulted in around 12 o'clock with my HD800. Someone needs to mod the Quickie tubes and PJCCS board into the Crack itself and use the Crack power. Then remove the volume control on the Crack and have it on the Quickie section solely. biggrin.gif
post #4953 of 5989
Quote:
Originally Posted by FlySweep View Post

Originally Posted by olegausany View Post

Where you got it from?

 

The 'Bay, my friend.  I got mine for what I'd consider a steal (considering this tube is pretty well regarded, from what I can tell).. here's a listing for a pair that looks identical to mine.

Thanks for information but the only reason i asked is that you can get some tubes from online stores that have nothing to do with eBay
post #4954 of 5989
Quote:
Originally Posted by Sonido View Post

I personally kept the Crack at 9 o'clock and used Quickie for volume control, which resulted in around 12 o'clock with my HD800. Someone needs to mod the Quickie tubes and PJCCS board into the Crack itself and use the Crack power. Then remove the volume control on the Crack and have it on the Quickie section solely. biggrin.gif

lol I also use the HD800 and my ears would explode (implode?) at 12 o'clock :P
There is one thing I discovered not long ago is the difference in a DACs power output. An ODAC has a much lower output than my AGD Ref5. This means with ODAC I can actually go 9-10 o'clock. Still not sure if I could go twelve o'clock unless I don't clean my ears for a year lol
post #4955 of 5989
The volume control is actually improved with the quickie. Volume on the crack I leave at 9 and the quickie pot had lots of play. With the crack only the pot gets loud quickly.
post #4956 of 5989
Quote:
Originally Posted by MattTCG View Post

The volume control is actually improved with the quickie. Volume on the crack I leave at 9 and the quickie pot had lots of play. With the crack only the pot gets loud quickly.
Especially when you have stepped antenuator
post #4957 of 5989
Quote:
Originally Posted by JamieMcC View Post
 

 

Looks good with the black top :bigsmile_face:

 

Thanks Jamie. Mine came as transparent yellow. Solid yellow would have been cool, but transparent made it look messy because you could see all the wires. I had the paint so I decided to spray it and am very happy with the results. 

 

Quote:
Originally Posted by grrraymond View Post
 

So, in short, people would recommend the Quickie as another worthwhile upgrade to a SB'd Crack?

 

I've got some Mundorf caps coming in and just bought a used rDac on eBay to see whether there's much of a noticeable difference from the Fiio E7 as a DAC. If so, I'll spring for something a bit more substantial towards the end of the year.

 

I'm going to fit the 470 resistor switch as well. After a few days sitting with it, I think that the E80CC/TS5998 combo has lost a bit of bass with the resistor mod. The mids are wider and more detailed than ever but it's a little bit thinner in texture. I'd like to confirm my suspicions, as the initial added detail and mid-range separation got me very excited but I'm finding it doesn't quite hit the same spots.

 

Caps will also be interesting.

 

I personally found the Quickie plus Crack combo different, but not necessarily better. I definitely liked the extra volume range provided, but ended up using the Crack straight from my DAC. This might also depend on the sound characteristics of our sources though. 

post #4958 of 5989
Quote:
Originally Posted by Loquah View Post

I personally found the Quickie plus Crack combo different, but not necessarily better. I definitely liked the extra volume range provided, but ended up using the Crack straight from my DAC. This might also depend on the sound characteristics of our sources though. 

Could also have to do with the headphone you use. It seems the effect is most profound on Sennheisers (600, 650, and 800 are ones some of us have tried). I've also tried the combo with a Beyerdynamic T90 and the Quickie didn't improve things much.
post #4959 of 5989
Quote:
Originally Posted by Sonido View Post


Could also have to do with the headphone you use. It seems the effect is most profound on Sennheisers (600, 650, and 800 are ones some of us have tried). I've also tried the combo with a Beyerdynamic T90 and the Quickie didn't improve things much.

 

Interesting. I was using it with T1s so that might make sense.

post #4960 of 5989
Quote:
Originally Posted by Sonido View Post

I personally kept the Crack at 9 o'clock and used Quickie for volume control, which resulted in around 12 o'clock with my HD800. Someone needs to mod the Quickie tubes and PJCCS board into the Crack itself and use the Crack power. Then remove the volume control on the Crack and have it on the Quickie section solely. biggrin.gif

 

You can replace the crack pot with 100 kOhms resistors. That would sure improve the sound. I think, you can just connect wires white to white, red to red, black to black and put a 100 kOhms resistor between the ground lugs and center of each RCA... It could be also interesting to reduce the length of signal path by putting the RCAs closer to the front of the Crack.

post #4961 of 5989

I've just stuck a couple of 470K resistors in at the RCA jacks, as per the Crack FAQ on the BH forum. I was hoping to get a bit more action out of the Alps volume pot - I just can't get enough of that smooth action! - but while it's not made a massive difference (I can get it to 10, rather than 9:15), it does sound a bit cleaner. I was hoping to fit the E*)cc mod switches but only one turned up :p

 

Still, I've got the rDAC coming this arvo so I'm quite looking forward to that.

 

Also, I've fitted a new set of pads to the 650s and that honestly makes as audible a difference as some tubes. Soundstage sounds a little bigger and bass is deeper. I guess it makes sense: better seal and ears a tiny bit further from the drivers. It could be in my head but everything sounds better than ever.

post #4962 of 5989

It's time for me to change my pads!!

post #4963 of 5989

Well, the rDAC is a significant step up from the Fiio E7. I was dubious but, as ever with the 650s, it's opened everything out further but also brought back the bass just a touch, right to my kind of level. Neither my headphones nor Crack have sounded this good. There's both depth and weight (some of this partly attributed to the new pads, as above) but I can hear added richness and control across the spectrum, where the E7 must have been hitting its ceiling.

 

Again, I got a good deal on a used model, in excellent quality. I fully recommend for those looking to upgrade their DAC. It's probably even cheaper these days since the irDAC was released.

 

 

Edit: The rDAC is much better than I first realised. I've just been listening to Panda Bear's Tomboy LP. It's one of my favourite records because of the songwriting but I've always begrudged some of the production choices, the vocals have always seemed like a fog of reverb, and the whole record sounds quite muffled. No longer, the harmonies are unbelievably thick but they now soar far above the delayed guitar chimes and chunky beats. It's like someone lifted a lid from the record and it sounds absolutely enormous, like I always imagined it could be. Wow. I fully recommend the record. It's as far away as you can get from a dry male vocal but the thickness and richness of those mids sounds unreal.


Edited by grrraymond - 5/13/14 at 11:18am
post #4964 of 5989
Quote:
Originally Posted by radiojam View Post
 

 

Cool!  Are you experienced with DIY? how long did it take?

radiojam - 

 

There are some significant gaps not in the time lapse, like the finishing of the wood and top plate - several hours of sanding, staining and painting.  I went back and looked at the times on the time lapse, the bulk of the photo's was a 9 hour span, which is the sort of close up soldering.  I found I also had some lapses of me testing it with the meter for voltages as well.  All in all I probably spent 20 hours.

 

I had done some soldering of wiring since I was a kid in the late 70's, car stereo, minor repairs on stereo gear, but the main reason I built the Crack was because I wanted to hand assemble this kit, and hear it work at the end of the project.  I had a short when I powered it up, and blew up a resistor up across the power supply.  It took me 2 days to find the short, it was actually a tail on a resistor on the input tube that I failed to trim adequately, and it was touching the plate.  I cut off that tail, replaced the burned resistor, thanked the Bottlehead forum and set out to listen.  It took me about 6 weeks to even start the speedball because the stock amp is already so good.  I had HD-650's at the time (later switched to 600's), and it was so good I couldn't stop.  

post #4965 of 5989
Quote:
Originally Posted by MattTCG View Post
 

 

Nice!! I accept your offer. 

 

:beerchug:

 

All the upgrades for the crack are appreciable. The TS 5998 was a nice move up the ladder. As was the speedball. But they still take a backseat to the  upgraded quickie. 

Hey! I want in on this too.  

 

RonO

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Crack;Bottlehead OTL