[bozebuttons]

Pretty sure hp1/hp2 and hp3 were produced all at the same time between around 1989-1992. The hp3 were the drivers that were found to be less matched.

In 2003~ when Joe started offering his upgrade service he said that the stock hp-1/hp-2 drivers were identical and that if you were to send in a hp-1 he would dismantle the switches because it could only provide sonic interference.

I at one point owned several hp-1000 and found the hp-1 I had to sound the worst of the bunch, but could have been condition related.

I currently own the HP1,Hp2,Hp3 & the Hp1 is my favorite.

 

[Chefguru]

I currently own the HP1,Hp2,Hp3 & the Hp1 is my favorite.

Based on my experience with owning 7 different hp-1000 (including an hp-2i 2003) this is more a function of some sets sounding better than others, than it is a reflection of the hp-1 being better than the hp-2.