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Crack;Bottlehead OTL - Page 86

post #1276 of 5977

A review from InnerFidelity... http://www.innerfidelity.com/content/marvelously-addictive-bottlehead-crack

 

Quote:
Originally Posted by LordWormwood View Post

Just found this thread and the amp itself - so forgive if this has been asked before.
What would be the factory equiv. of the crack?
I am new to the world of quality audio and therefore treading the path carefully & slowly. Would I be 'wasting' money on the Crack for Q701?
I have never soldered a board before and know nothing of resistances etc - is this our of my legue?
Wormwood

 

From my memory, I did not think the K701 was a good match with the Crack. That was a long time ago though. 

 

The Crack isn't too hard to solder, and it comes with a fantastic manual. It helps if you've had some experience soldering other things before though. Check some youtube videos, try soldering on some scrap materials and wire to get a feel for it. 


Edited by Armaegis - 9/19/12 at 10:22am
post #1277 of 5977

Because this is an OTL design (output transformer-less) it is not usually considered a good match with low impedance headphones like the Q701 - the impedance mismatch will lead to bloated less controlled bass. 

 

I would look for either Transformer coupled tube amps (usually more expensive), hybrid tube amps (less expensive, usually), or solid state designs - which pair better with low impedance headphones. 

 

(Low impedance headphones need more current, less voltage, while high impedance headphones require higher voltage, but less current). 

post #1278 of 5977

Thank you both. 

 

Any directions for either of these?

 

 

 

Wormwood

post #1279 of 5977

From a DIY standpoint, none of your other Tube options are going to be as beginner friendly as the Crack. And frankly, it's a good enough amplifier, it's probably worth it to go ahead and make some day, and acquire a different set of cans to really take advantage of it - you can of course, use your Q701 with the Crack, it is just not a very good pairing to get the best out of both... 

 

So with that in mind, I would probably look at a basic solid state option to power the Q701. The "Lovely Cube" is a clone of the Lehmann Black Linear Cube (so is the M-Stage) and can be bought fully built, partially built, or as a full kit to build yourself. Likewise the 02 can be found fully built, or in various stages of partial builds for less money. Both of them will serve admirably paired with the Q701.

 

If you really want to go with Tubes and the Q701 (and DIY) - I would look at a hybrid like the Millet MiniMAX kit from Beezar - it's going to be a more complicated build though. 

 

Commercial tube amps to pair with it, would be the Schiit amps, the Little Dot 1+, Hifiman EF 5...

post #1280 of 5977

Liam,

 

Thanks for that. It's the second time that the O2 has been recommended for the Q701... so I just might head down that path. Of course now that I have stumbled through this doorway it's going to nag and eat away at me until I get one - so I will look into starting a Crack habit also.

 

 

Cheers all for the sagely advice.

 

 

Wormwood

post #1281 of 5977
Quote:
Originally Posted by Armaegis View Post

from InnerFidelity...
post #1282 of 5977

Thanks Draygonn for posting that link correctly... I was on an ipad so I didn't know if it was the forum/ipadness or just a slightly wrong cut&paste.

 

Wormwood

post #1283 of 5977
Quote:
Originally Posted by LordWormwood View Post

I have never soldered a board before and know nothing of resistances etc - is this our of my legue?
Wormwood
I haven't either but made it work.
post #1284 of 5977
Quote:
Originally Posted by Draygonn View Post

 

Whoops, can't believed I blundered like that. Edited the most... move along... nothing to see here... ph34r.gif

post #1285 of 5977
Quote:
Originally Posted by Armaegis View Post

 

Whoops, can't believed I blundered like that. Edited the most... move along... nothing to see here... ph34r.gif

Hey, reruns are supposed to end after Labor day!!  biggrin.gif

post #1286 of 5977

That is a great vid - the tips and tricks really help make me feel that this could be done by me without too much of a hic-up. 

 

 

Thanks for the posting of it.

 

 

Wormwood

post #1287 of 5977

Someone made a Facebook Fan Club for the Crack:

 

https://www.facebook.com/BottleheadCrackFanpage
 

post #1288 of 5977

There's a group buy for this amplifier over at massdrop

 

I'm extremely tempted to jump in and get back into tubes! 

post #1289 of 5977
I extremely impressed by the Crack. Ref5 into the Crack with HD800 is an amazing setup. I think I am done with upgrades.
post #1290 of 5977
Quote:
Originally Posted by elwappo99 View Post

There's a group buy for this amplifier over at massdrop

 

I'm extremely tempted to jump in and get back into tubes! 


If they get 25+ committed Ill probably jump on this as I really dont feel the Crack is worth more than $200.

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