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Bottlehead Amplifier Discussion / Comparison Thread: Crack, SEX & Mainline - Page 36

post #526 of 775

lol, very good!

post #527 of 775
Quote:
Originally Posted by JamieMcC View Post
 

Out of interest has anybody tried the LCD-2 Rev 2 with sex or mainline?

The SEX with the LCD2's in my opinion sounds fantastic.  I think that at around that price point it doesn't get any better. 

post #528 of 775
Thread Starter 

+1

post #529 of 775

hello bottlehead thread,

 

I currently have and love the Alpha Dogs. I am looking for a tube amp. Has anyone used the ADs with either the Mainline or SEX? What did you think and which amp works better? Has anyone compared the Bottleheads to the Woo WA22? I know the woo is more than twice the price but it is within my strike range (just barely) so whichever one is actually generally better with planars would be my selection.  BTW, I know how to use a soldering iron so the building process is not a consideration.

post #530 of 775
Alpha Dogs are low impedance headphones while SEX was designed for high impedance
post #531 of 775
Quote:
Originally Posted by olegausany View Post

Alpha Dogs are low impedance headphones while SEX was designed for high impedance

That is incorrect. The S.E.X. amp works with any headphone impedance. It should work fine with Alpha Dogs. I suspect you were thinking of the Crack amp.
Edited by Doc B. - 4/11/14 at 9:18am
post #532 of 775
Quote:
Originally Posted by Doc B. View Post

That is incorrect. The S.E.X. amp works with any headphone impedance. It should work fine with Alpha Dogs. I suspect you were thinking of the Crack amp.

Sorry for mistake but does this apply to any version of the SEX,for example discussed in this threadh http://www.head-fi.org/t/517742/a-thread-for-my-sex-amp
too or to current version only?
post #533 of 775

You are asking me if it applies to an amp where the owner modified the amp by installing someone else's transformers instead of ours. 

post #534 of 775
Quote:
Originally Posted by Doc B. View Post

You are asking me if it applies to an amp where the owner modified the amp by installing someone else's transformers instead of ours. 
So it's transformer dependant no impedance switch needed?
post #535 of 775

The stock transformer can be wired for 4,8,16 or 32 ohm outputs. I don't think those figures represent the actual output impedance of the amplifier but the intended output loads. i.e. 4,8,16, or 32ohm speakers.  Perhaps Doc can confirm that?

 

With the optional impedance switch board you can switch between them easily without having to rewire, and also adds the option to run the speaker outputs in a balanced configuration. Or headphones if connected through the speaker binding posts, or through an XLR socket should you install one.

 

I've run everything from Earbuds, to Grados, to balanced HD650's through the amp, and have just ordered HE-500's.  There isn't much you cant run, its a very versatile setup.

post #536 of 775

I am getting confused. 

 

The original post you made said that the S.E.X. amp did not work well with low impedance headphones. This is incorrect.  A Bottlehead S.E.X. amp with the stock Bottlehead transformers works well with headphones of any impedance. The stock Bottlehead transformers can be run as 4,8,16 or 32 ohm secondaries. Most users seem to like the 8 ohm tap best for pretty much any headphone. Anything from very low impedance IEMs to 600 ohm Beyers should work fine.

 

You then asked if a S.E.X. amp that someone put different transformers with different taps in, that are not designed or sold by Bottlehead, works the same way. I have no knowledge of that transformer, the amp in question is no longer the stock Bottlehead S.E.X. amp as we designed it and thus I am not qualified to comment. Based solely upon the secondary impedances mentioned I can speculate that the 300 ohm tap might not have an acceptable signal to noise ratio with the zero global feedback circuit of the S,E,X, amp. 

 

The impedance switch itself is an upgrade of convenience that allows one to change impedances without having to desolder and move some connections on the stock output transformer. 

post #537 of 775
Thread Starter 
Quote:
Originally Posted by KmanChu View Post
 

hello bottlehead thread,

 

I currently have and love the Alpha Dogs. I am looking for a tube amp. Has anyone used the ADs with either the Mainline or SEX? What did you think and which amp works better? Has anyone compared the Bottleheads to the Woo WA22? I know the woo is more than twice the price but it is within my strike range (just barely) so whichever one is actually generally better with planars would be my selection.  BTW, I know how to use a soldering iron so the building process is not a consideration.

 

I haven't had the pleasure of trying the Alpha Dogs with either of these two amps, but own both and have tried the Alphas separately. Are they noticeably better with extra power behind them?

post #538 of 775
Quote:
Originally Posted by Doc B. View Post

I am getting confused. 

The original post you made said that the S.E.X. amp did not work well with low impedance headphones. This is incorrect.  A Bottlehead S.E.X. amp with the stock Bottlehead transformers works well with headphones of any impedance. The stock Bottlehead transformers can be run as 4,8,16 or 32 ohm secondaries. Most users seem to like the 8 ohm tap best for pretty much any headphone. Anything from very low impedance IEMs to 600 ohm Beyers should work fine.

You then asked if a S.E.X. amp that someone put different transformers with different taps in, that are not designed or sold by Bottlehead, works the same way. I have no knowledge of that transformer, the amp in question is no longer the stock Bottlehead S.E.X. amp as we designed it and thus I am not qualified to comment. Based solely upon the secondary impedances mentioned I can speculate that the 300 ohm tap might not have an acceptable signal to noise ratio with the zero global feedback circuit of the S,E,X, amp. 

The impedance switch itself is an upgrade of convenience that allows one to change impedances without having to desolder and move some connections on the stock output transformer. 

Thanks a lot for clarification
post #539 of 775
I haven't used the Alpha Dogs with any amp more potent than an ifi iCAN. It is only rated at 400mW but seems to drive them with authority. I am going to a meet next weekend where some more potent amps will be around for sample. I have heard the ADs respond well to a powerful amp, but at any sane volume the iCAN is not breaking a sweat even in the middle gain setting. I was just curious to see if any on here could chime in.
Quote:
Originally Posted by Loquah View Post

I haven't had the pleasure of trying the Alpha Dogs with either of these two amps, but own both and have tried the Alphas separately. Are they noticeably better with extra power behind them?
post #540 of 775
Quote:
Originally Posted by KmanChu View Post

I haven't used the Alpha Dogs with any amp more potent than an ifi iCAN. It is only rated at 400mW but seems to drive them with authority. I am going to a meet next weekend where some more potent amps will be around for sample. I have heard the ADs respond well to a powerful amp, but at any sane volume the iCAN is not breaking a sweat even in the middle gain setting. I was just curious to see if any on here could chime in.

 

Hi kmanchu - sorry for the delayed response here and in the AD thread.  I've been traveling for the last 10 or so days and not really keeping up.  I own both the AD's and mainline, and the mainline does indeed drive the AD's very nicely.  To me, the combo doesn't quite have the incredible magic of the mainline -> hd800's - which is simply as good as headphone audio gets in my book (better even than BHSE -> stax to my ears), but the mainline is very impressive with AD's nonetheless.

 

I should note though that there isn't a huge amount of headroom in terms of volume with this setup.  With my very softest classical recordings, I can max the mainline's volume without having the AD's hurt my ears (although they are still a bit louder than I would normally listen).  The same position on the attenuators with my hd800's would blow my head right off my shoulders.  With your average album, I listen around 2/3 volume with AD's and under 1/2 volume on hd800's.  Hope this provides some useful insight.  If you have any specific questions, feel free to run them by me!


Edited by skeptic - 4/14/14 at 5:19pm
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