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Hairball Audio, LLC
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March 1st 2015

We've updated the partial FET kit BOMs. We've been testing a lot of different caps in the shop lately and have changed the BOMs and complete kits to reflect what we think sounded best.

January 23rd 2015

FET/500 compressors and Elements series mic pres are in-stock and shipping now!

October 4th 2014

We're very excited to announce the release of the "Analog" line of FET Compressors in 500 series. Please visit the FET/500 Sub-Site for details on these amazing compressors that are on sale now!

July 16th 2014

We're very excited to announce the release of our "Elements" line of mic pres. Please visit the Elements Sub-Site for video, sound files, and details of these amazing pres that are on sale now!

January 29th 2014
We had kits today but they sold out fast. We're working really hard to get more in the next 2-3 weeks. Please bear with us, we're working to get the supply issues fixed.

If you would like to be notified when kits arrive, send an email to

We'll have Lola kits this Friday or Monday.

December 8th 2013
You may have noticed most of our kits are out of stock (thank you!). Here is an update on when we will have more.

We are currently out of FET Compressor kits. We will have a small batch (about 15) of COMPLETE revision D kits for sale around December 12th. We also expect to have PARTIAL Rev F/G kits available at that time. We should have LOTS of EVERY kit we sell in mid January.

We are also out of Lola kits until mid January.

If you would like to be notified when kits arrive, send an email to

October 5th 2013
Checkout our new COMPLETE Rev D FET Compressor kit! Everything you need to build the classic blackface in one box!

July 3rd 2013
We're currently soldout of blue stripe enclosures for our FET Compressor kits. We'll have blue enclosures early next week. We're also out of Lola's and should have more in about 2 weeks. Send and email to info (at) hairballaudio (dot) com if you'd like to be notified when we have stock.

March 29th 2013
FET Compressor kits and DIY 990's are back in stock! We should have Lola kits back in stock around April 10th. Send us an email to be notified.

March 23rd 2013
We're back from our break and the store is open again! We've got t-pads, 8037 meters, and 2X25 power transformers back in stock.

January 31st 2013
We are currently out of revision A and D output transformers which means we're out of revision A and D FET compressor Kits. We expect to have them back in stock around February 21st 2013.

If you'd like to be notified when they are in stock, just send us a quick note to "".

January 22nd 2013
Happy New Year! We've got lots to announce!

First, the good people at Tape Op magazine published a great review of our Lola mic pre in the latest issue (#93).

Second, we're proud to announce the release of our DIY and full built 990 op-amp! Details can be found in the discrete op-amps section of our shop.

Third, small FET Compressor knobs are on the way so backordered kits should ship this weekend.

December 21st 2012
We survived the apocalypse!
8037 VU meters are now back in stock! Backorders are starting to ship and we should be caught up by tomorrow. We're getting low on BlueStripe enclosures but we have a new batch arriving on December 27th. Some new exciting stuff will be in the store in late January. Join our Facebook page to keep in the loop!

December 5th 2012
We are currently sold out of VU meters for FET Compressor Kits. You may still pre-order a FET Compressor kit, however it will not ship until the next batch of VU meters arrive. They are scheduled to arrive on December 26 2012.

November 18th 2012
We're waiting on a few parts for the FET Compressor kits. Blackface enclosures should arrive mid week and we're hoping to get more input transformers this week as well. We'll keep you posted! In the meantime go "like" us on Facebook to keep in the loop!