Single Ended eXperimenter’s Kit 3.0 for Headphones & Sensitive Speakers


You can learn more about the C4S upgrade for this kit at this link.



This product has a universal power transformer and can be used worldwide by following the wiring instructions in the manual. Please note that international customers will need to provide their own power cord.

SKU: SEX3.0 Category:

S.E.X. 3.0

The S.E.X. 3.0 Kit will run any dynamic headphones – even AKG K1000s & Audeze LCD-2s – to great effect, and with two watts per channel power output it can also drive efficient loudspeakers. The updated S.E.X. Kit has the following improvements:

The big update is that we have changed the tubes used from the now difficult to find 6DN7 to the 6FJ7. The 6FJ7 is the same tube in a different glass envelope designed to fit in a Compactron socket. Same great sound, but in a tube that isn’t being gobbled up by our competitors who have (finally) caught on to the great sound of the 6DN7. The other significant changes are a new universal power transformer, new heater circuit wiring for exceptionally low noise operation that allows use even with sensitive IEMs, and an improved assembly manual and easier to build layout. Output iron is the same OT-2 as used in the StereomourII . . . (see ‘more’)

DISCOUNTS: When you buy 1 > Regular Price: $539.00USD • When you buy 2 or more > Sale Price: $485.10USD • Save: $53.90USD (10%)!

Your pre-order will be charged the day the kit is ordered. We do this to allow cash in advance payment to our vendors to keep the price you pay as low as possible. DIY audio is a very focused esoteric market. We are a small staff with a large passion, attempting to offer the broadest range of kits possible to those interested in this exclusive pursuit of ultra high quality audio reproduction, Thus each kit is manufactured and packed to order, and the production and packaging schedule is influenced by demand. Please understand that our shipment can take up to 3 to 6 weeks when demand is high. You may check how shipping is progressing for a kit by looking here.

Additional information

Weight 14 lbs
Dimensions 12 x 10 x 6 in
Upgrade Options

Basic S.E.X. 3.0, S.E.X. 3.0 with C4S Upgrade


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