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Bottlehead Amplifier Discussion / Comparison Thread: Crack, SEX & Mainline - Page 58

post #856 of 869

Great to see another S.E.X. amp being born, congrats!

 

I found the 4ohm tap is perfect for low impedance cans ~32-64 ohms, for high impedance cans like the 300ohm HD650's i prefer the 8ohm tap for the reasons you described, 4ohm just sounds a bit too thin.

post #857 of 869
Quote:
Originally Posted by mcandmar View Post

 

I found the 4ohm tap is perfect for low impedance cans ~32-64 ohms, for high impedance cans like the 300ohm HD650's i prefer the 8ohm tap for the reasons you described, 4ohm just sounds a bit too thin.

 

I am pleased about that as have just wired my Sex up for 8ohm as well

post #858 of 869
Quote:
Originally Posted by JamieMcC View Post
 

 

I am pleased about that as have just wired my Sex up for 8ohm as well

 

Speaking of S.E.X. amps being born, when is the big reveal happening? :popcorn: 

post #859 of 869
Quote:
Originally Posted by mcandmar View Post
 

 

Speaking of S.E.X. amps being born, when is the big reveal happening? :popcorn: 

 

Plate chokes and transformers have gone in today progress on the hook up is planned for tomorrow. Will take a pic later. Building stock to start with (save for the pot) then once up and running planning on implementing a few of the mods you have listed in your bhf thread 8-)

post #860 of 869

Here you go build progress to date.

 

 

post #861 of 869
Thread Starter 
Nice!!

Did you source your own attenuators or is it an option from Bottlehead now?
post #862 of 869

Looking good, Jamie!

post #863 of 869
Quote:
Originally Posted by Loquah View Post

Nice!!

Did you source your own attenuators or is it an option from Bottlehead now?

 

The attenuator is the A5 stereo, 35 stepper from Glassware Audio, I have mine configured with  -1dB and -6dB fine and coarse adjustments  -2dB and -12dB is also available.

 

 http://glass-ware.stores.yahoo.net/atandsise.html

 

They can supply resistors but I opted to source some Vishay Dale RN55 low noise, mil spec resistors from Mouser for the Sex's attenuator. Its a nice bit of kit and the fine adjustment really is nice to have after the Valab but it does take up a fair bit of real estate at the front of the amp. It was a tight squeeze in the Sex the headphone socket needed relocating outward a further 10mm to get it to fit and the overlay now covers the original hole.

post #864 of 869
Quote:
Originally Posted by JamieMcC View Post
 

 

The attenuator is the A5 stereo, 35 stepper from Glassware Audio, I have mine configured with  -1dB and -6dB fine and coarse adjustments  -2dB and -12dB is also available.

 

 http://glass-ware.stores.yahoo.net/atandsise.html

 

They can supply resistors but I opted to source some Vishay Dale RN55 low noise, mil spec resistors from Mouser for the Sex's attenuator. Its a nice bit of kit and the fine adjustment really is nice to have after the Valab but it does take up a fair bit of real estate at the front of the amp. It was a tight squeeze in the Sex the headphone socket needed relocating outward a further 10mm to get it to fit and the overlay now covers the original hole.

 

Quote:
Originally Posted by bigfatpaulie View Post
 

Looking good, Jamie!

 

Cheers, its been good not feeling the need to rush this one, its just been slowly moving forward as and when!


Edited by JamieMcC - 10/18/14 at 1:47pm
post #865 of 869
Quote:
Originally Posted by JamieMcC View Post
 

 

 

Cheers, its been good not feeling the need to rush this one, its just been slowly moving forward as and when!

 

I've been toying with getting a Mainline just for that reason.  When you and I built our Cracks I think we both were in need of an amp.  Things are different now :)

post #866 of 869

All up and running now cheers Sex buddies

 

 

 

 

post #867 of 869
Quote:
Originally Posted by JamieMcC View Post
 

All up and running now cheers Sex buddies

 

 

 

Cheers to that!!  Nice job!

post #868 of 869
Thread Starter 

Beautiful work as always, Jamie!

 

I'm looking forward to your impressions as a seasoned Crack owner

post #869 of 869
Looks amazing Jamie! Love the CF on the transformers.
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