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For Sale: FS: 12AU7 Starving Student Millett Hybrid (SSMH) headphone amplifier with built-in GrubDAC (USB)

post #1 of 12
Thread Starter 
This Classified is Closed

For Sale:
FS: 12AU7 Starving Student Millett Hybrid (SSMH) headphone amplifier with built-in GrubDAC (USB)

Will Ship To: CONUS

I'm putting my beloved SSMH up for sale. I spent a good month or so making sure this DIY amplifier turned out as best as I could possibly do, and I think I did a pretty good job if I do say so myself. It's served me well for the past nine months, providing tons of power and a good representation of both tube euphonics and solid-state detail. The only reason I'm putting it up for sale is because I just received a Millet Hybrid MiniMAX, along with a Music Streamer II, and I can't use two amplifiers at once, so one of the setups has to go.

 

There's one stipulation I must require when I sell this amp to you, and that is that I must be able to track the location of this amplifier once it is out of my hands. In other words, I want to know if it gets sold to someone else. I have an unnatural attachment to any of my DIY creations, and this one is above all nearest and dearest to my heart, so I would like to know the status of the amplifier, as I would like to be able to reacquire it in the future.

 

There is one minor issue with this amplifier, and that is that the gain is a little high for typical usage. Most especially, low impedance headphones (basically anything under 80 ohms, or IEM-like sensitivity) will hiss at any volume level. This may be fixable by cutting out the cathode bypass capacitors (C7/C8 on the SSMH schematic). Some have suggested this as a possible gain fix; I haven't done it due to lack of time and the fact that most of my main headphones are either very low sensitivity (AKGs) or high impedance (Beyers, Sennheisers). They perform incredibly well with the 300 and 600ohm headphones I've had, and can even drive the HE6 to listenable volume at noisy ambient noise levels (i.e. head-fi meet conditions).

 

I will be including the amplifier, Cisco power supply, and an extra set of tubes (two total). You will require either RCA cables for your own source (as I have an input selector switching between the GrubDAC and an RCA input) or a USB for the Grub.

 

As for price, I paid around $200 for all the parts (yeah, no longer "starving student", I know...), and put countless hours of work into planning the layout, air-wiring the parts together, troubleshooting, designing the panels, drilling the panels and doing the laser engraving myself. Due to the hiss issue I'd like to get back at least $160 plus shipping to the CONUS, or best offer. Please send me a PM if you're interested, thanks!

 

More pictures can be found here:

https://picasaweb.google.com/submergence/StarvingStudentMillettHybridSSMH#

 

Parts:

Nichicon KW bypassed with Wima MKP output caps

Wima MKP interstage caps

Nichicon Muse ES

Nichicon PW power caps

National Electric/Pro-Comm matched 5814A tubes (somewhat generic)

LED diode protection at the output, for turn-on/off DC offset


Edited by Ikarios - 5/26/11 at 9:21pm
post #2 of 12

I've heard this little beauty and can vouch for the fact that Jimmy did a great job.  It looks and sounds great!

post #3 of 12

looks dam nice to me. was looking at building one of these.... but buying might be better given my (lack of) amazing skill. 

 

is that hiss likely to be an issue with K702s?

post #4 of 12
Thread Starter 
Quote:
Originally Posted by Surruk View Post

looks dam nice to me. was looking at building one of these.... but buying might be better given my (lack of) amazing skill. 

 

is that hiss likely to be an issue with K702s?


No, I used them with my K701s and never noticed the noise floor. It's related to sensitivity and impedance somehow, since the K701 is nominally low-impedance but is quite low sensitivity. It's more of an issue with Grados, Denons, portables, and IEMs.

 

post #5 of 12

Great. Any chance of shipping outside CONUS?

post #6 of 12

You built this yourself? How would you if you can compare this to Fiio e7+e9?


Edited by Gorgatron - 5/17/11 at 6:25am
post #7 of 12
Thread Starter 
Quote:
Originally Posted by Gorgatron View Post

You built this yourself? How would you if you can compare this to Fiio e7+e9?


Sorry, I've never had the chance to listen to the E7/E9.

 

post #8 of 12

PM sent

post #9 of 12

Any chance of shipping outside of the states?

post #10 of 12
Thread Starter 

International shipping is fine as long as you foot the bill for USPS Priority International (should be around $30-35).

post #11 of 12

Courtesy bump for Aflac.


This is a great little amp and a steal for the price.

post #12 of 12
Thread Starter 

Thanks for the bump attempt, but with the forum software that doesn't work anymore. tongue.gif but I have dropped the price! yay!

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