I purchased this on Audiogon from the original builder and used very lightly. I have 2 Electroharmonix and one cleartop 12au7/ecc82 tubes which I will include. I also have 3 Telefunken ecc82 tubes that I will sell to the buyer for $50 additional.
The gain from the 3 outputs vary so that you can use the preamp with many different amps and speakers with great results. The "whispers" volume controls are a bit scratchy, which I assume would improve with some contact cleaner.
From bottlehead dot com:
Everyone knows that Foreplay is best when given your most lavish and prolonged attention, yes? Here's our recipe for a most delightful Foreplay experience. The Extended Foreplay upgrade kit takes your Foreplay III to new levels of ecstasy, with the addition of the following new toys:
Dual mono power supplies fed from separate high voltage Bottlehead PT-3 power transformer secondaries, ultrafast soft start full wave bridge rectification and Panasonic CRCRC filtration
Paul Joppa designed dual hybrid 12AU7 tube/TL431 shunt regulators with Camille Cascode Constant Current Source active loads
Camille Cascode Constant Current Sources (C4S) on each stage of the direct coupled, buffered output preamplifier circuit
Auricap 2.0 uF output capacitors.
The standard Foreplay III kit with it's gaseous shunt regulator is generally recognized by the Bottlehead community to be a significant improvement over the most heavily modified of the earlier versions of Foreplay. We feel that this new dual mono hybrid shunt regulator and constant current source upgrade takes the Foreplay III to an even higher level of resolution and sonic realism. The extensive upgrade package sonically equals or exceeds every previous line stage design we have published. The audible improvements over the stock Foreplay III include increased resolution; more articulate and dynamic bass performance; a sense of greater extension at both ends of the audio frequency spectrum; and a sense of a complete lack of electronic artifacts during quiet passages, often called a "black background" in audiophilespeak.
The kit is installed after the stock power supply, shunt regulator, and plate and cathode load components are removed from the standard Foreplay III. Two new power supply filters are installed, a new tube socket is installed for the dual triode shunt regulator, and three circuit boards are populated and installed, which contain the constant current source and hybrid shunt regulator components.
We consider this a Skill Level 3 kit. It has some PC boards, a lot of parts and it requires some disassembly of the existing circuit. It would make a great second kit for more experienced builders, though quite a few first timers have completed them as well. Detailed instructions with high resolution photos will be included in Adobe Acrobat .PDF format, on CD-ROM.
Price of the Extended upgrade kit alone is $349 plus shipping. The discounted package price for the standard Foreplay III kit with the Extended Foreplay upgrade kit together is $754 plus shipping, a savings of $84 over the kits purchased separately.