Hybrid Tube Amp for the Raspberry Pi

A project in Smithfield, RI by Pi 2 Design
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Funding Successful

Bring that "Sweet Tube Sound" to the Raspberry Pi!
Backers: 749
Average Pledge Per Backer: $139

Funded: $103,748 of $20,000
Dates: May 2nd -> Jun 6th (35 days)
Project By: Pi 2 Design
Tags:
raspberry pi +Suggest

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$103,748

current pledge level
Last Updated: June 6 @ 18:01 -0400 GMT

518%

of goal
funding period ended

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Latest News

Fantastic campaign everyone!

June 6th - via: kickstarter.com
We wish to thank everyone who backed this campaign. We also want to acknowledge all of you who made such great comments and suggestions. This is a much better product than we had in the beginning. And we owe it all to you folks! Now we get down to... (Read More)

Stretch Goal # 2 - $100K, In the books!

May 31st - via: kickstarter.com
Again all we can say is WOW!  The support for this project has been so fantastic. So many great questions, so much solid feedback. We really feel this is a collaborative design now. We started with a basic idea and you guys (and gals) made it... (Read More)

Quick update on progress

May 28th - via: kickstarter.com
Hello all. Just a quick update on our progress. As we mentioned, the Rev. P3 PCB's are being fabricated now. It will be just a small batch of 20 to make sure we have everything nailed down prior to production of the 1K+ we will need to build. All... (Read More)

Rev P3 3D Renders

May 21st - via: kickstarter.com
Now that the P3 design is complete, reviewed and dispatched to the PCB shop, we can share these 3D renders. These show all the new features we added for Stretch Goal #2. Although as of now, we have not quite hit that goal, we are confident enough to... (Read More)

Stretch Goal #2 Update - Volume Controls and Analog In and Stand Alone Operation, oh my!

May 18th - via: kickstarter.com
Based on great backer input and after spending many hours pouring over the design, we have calculated out how to add even more to the upgrades announced for Stretch Goal #2. We are adding a volume control as hinted at, and, drum roll please, analog... (Read More)

503HTA Rev. 2 Test Results

May 15th - via: kickstarter.com
Hello all. Sorry for the delay in getting these to you. The main issue was working the various options and finding the "sweet" spot that is also repeatable. One surprising thing we found was that the 6922/ECC88 is noticeable better than the... (Read More)

Stretch Goal # 2 - Upgraded Capacitors, Power Switch and Volume Control Option - $100K

May 11th - via: kickstarter.com
If we meet this goal we will replace the Cathode Bypass caps with Nichicon Fine Gold (FG) series 220uf/10V caps. We will also replace the Electrolytic Power Bypass caps with Nichicon Aluminum Polymer low ESR caps. These changes will improve overall... (Read More)

Sneak Peek of 2nd Revision Prototype

May 11th - via: kickstarter.com
I made this quick video yesterday and didn't get a chance to post it. DISCLAIMER: I shot this video on my phone so take that into consideration when viewing it as it is a very rough cut. It will be another day or two to get all the readings and... (Read More)

Wow - Stretch Goal Number 1 - Nailed it!

May 11th - via: kickstarter.com
You guys (and gals) are awesome.   So now every unit will come with the pair of adapter cables. Next we should think about a second stretch goal. We're thinking about upgrading all caps to Nichicon (output caps are already Nichicon), plus adding a... (Read More)

Update on Demo Video

May 10th - via: kickstarter.com
Now that we have the 2nd rev up and running, we are getting ready to do the demo video.  e had to update our demo player to Volumio 2 and it looks really nice with iPhone/Android control. It will be a few more days though as my lead engineer (who is... (Read More)

Stretch Goal # 1 - Audio Adapter Cables - $75K

May 9th - via: kickstarter.com
If we make this goal, every 503HTA will ship with a pair of adapter cables. The first is a 1ft. 3.5mm male to 1/4" female. This allows you to plug your high end headphones into the 503HTA. 3.5MM Jack to 1/4" Female The second cable is a 1ft. 3.5mm... (Read More)

Quick Update on rev. 2

May 7th - via: kickstarter.com
First day testing on Friday went amazingly well.  The new relay circuit totally eliminates power down pops and reduces power up to a tiny little bump!  Sound was even a bit cleaner, but we'll know more when we run the Audio Analyzer tests.  Along... (Read More)

New Pictures of Second Prototypes

May 5th - via: kickstarter.com
I couldn't wait until tomorrow to get the new pics up, so I rushed back to the office after dinner and here they are:  The individual pics can be found in the main campaign story as well. We'll have the demo video up of the working prototypes at the... (Read More)

2nd Early Bird Extended Perk Added

May 5th - via: kickstarter.com
Just for being awesome we added another 2nd Early Bird perk at the $109 price point. Let's keep the success going, so spread the word and share the campaign! Production Update: Second Revision units have come off of the assembly line. We're hustling... (Read More)

Fully Funded in Less than 3 Days!!!!!!!!!

May 5th - via: kickstarter.com
WOW! We want to thank all of our backers for making this project a success in such a short time. We had high hopes, but you've gone above and beyond our expectations! We are building the second revision today and we will upload the new pictures by... (Read More)

50% Funded!!!!!

May 4th - via: kickstarter.com
We're off to a great start so far hitting the 50% mark in about 36 hours! Thank you to all of our backers who helped us get here so quickly. Keep spreading the word and we'll get to 100% very quickly. Production Update - We will be building the... (Read More)

Early Bird Double Up Perk Added

May 3rd - via: kickstarter.com
We have added an Early Bird Double Up perk for $198 per some early backer input. If you would like to get two units at the introductory pricing and have already pledged, just cancel your pledge and select the new perk and you'll get two of everything... (Read More)

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