Lipinski L707 speaker . Studio Monitor quality. Very highly regarded, used in studios all over the world . Comes with 15" subwoofer (one cone with rubbing voice coil)
UPDATE JAN 2026
So what is happening with Supratek ?
In 2023 I was diagnosed with neuroendocrine cancer - Grade 3, Stage 4 . Metastasised to liver and bones , so, at the moment uncurable .
I underwent some pretty serious chemotherapy and radionuclide therapy and am now stable for the moment.
I'm feeling quite good, but have retired .
I'm trying to get the last orders for preamps done, and am still available for repairs in Australia and Asia.
Johhny Slate in North Carolina can be contacted at supratekrepairusa@gmail.com for repairs and all things Supratek in the US.
I'm enjoying life , listening to music , keeping fit and building the occasional piece of audio equipment to keep my hands and mind active.
After nearly 50 years of audiophile nonsense, I have quite a collection of audio equipment and parts.
Amplifiers, speakers, speaker drivers, preamps, transformers( power, output and interstage), components etc. Thousands of audio tubes.
Too much and I want to clear my workshop of most of it.
I'll soon begin to list it all on this blog , so keep an eye on this page .
It will all be at bargain prices - I've had some of these goodies for a long time and I'm not aiming to make a profit on it, so prices will be bargain basement - NOS tubes for $10 etc.
Give me a good reason and I'll give it away!
Please don't contact me before the lists go up, it's a big job and I probably won't reply while I'm doing it.
Pix below of my end of game system - well that is what I tell myself, but it does sound great and I'm grateful for the time I have listening to it.
At the heart of system is the Grange preamp .
Bass amp is one of Bob Carvers Load Invariant amps - I'm using a T-Bass device which basically gives sub woofer extension to a conventional bass driver in Open Baffe configuration. But its a 1-2 ohm load so need to use a solid state amp to get the necessary voltage - The Carvers can do that while sounding like a big powerful tube amp.
The mid or full range amp is one of many I use depending on my mood or the season. Single ended 6C33C-B , 300B, 6B4G or 6B4G , EL34 push pull amps.
The tweeter amp is a Loftin White 6B4G (my favorite tube) Single ended amp .
FOR SALE
I've an Ebay Store (Supratek) on which I will list items under these categories:
Tubes/Valves
Speakers/Drivers https://supratekaudio.blogspot.com/2025/12/speakersdrivers-for-sale.html
Preamplifiers
Turntable/Accessories
Amplifiers
Tube Audio Books
Transformers
And more as I uncover items. Rock Bottom Bargain Prices . Make me an offer.
Ok Lets start the list with tubes I have available for sale .
Minimum order is $AUD100 . Its not worth my time for less after testing and close matching for emmission , packaging and sorting etc.
Contact me with what you want and we'll sort it out.
POWER TUBES
6G6G
6F6
EL32
7027A
6V6
EL34
EL37
6336
6AS7/6080
S12E1
S11E12
807
6K6G
6Y6G
DHT PREAMP TUBES
33
101
4P1L
6P2L
3A/110A
19
30
26
71A
DHT POWER TUBES
805
211
6B4G
801A/10/10Y
CV1076/DA42
830B
809
300B
OCTAL PREAMP
6J5
6H9C/6SL7
6SN7
6F8G
5 PIN PREAMP
37
76
56
RECTIFIERS
CV187
8020
3B28
VOLTAGE REGULATORS
OA2
OA3
9/7 PIN PREAMP TUBES
12B4A
6E6P 6E5P
6H23
5693
12AU7
6C19
5965
SV83
12AX7
6N2C
12BH7
12AY7
6J6
12AT7
6BQ7
6CM7
6GK5
6N1P
6AL5
417/5842
EF86/6267
6C4
6CB6A
6CW5
6211
6CW7
6BM8
6CG7
6U8A
6072
e180F
E810F
ECC88/6922/E88CC
5687
and more .....