Stone Temple Pilots are moving on to the second single from their 'High Rise' EP and 'Black Heart' will also hold a special place for bassist Robert DeLeo. The rocker recently told us that the nasty groove that comes from his bass was the result of him finally procuring a long sought-after instrument.

"It's special for me," said DeLeo. "I just bought and found a rare bass that I had been looking for for years. I got a chance to use it on that song, so that meant a lot too. To do that from a gear geek kind of perspective."

He went on to add, "I've been looking for this certain Rickenbacker 4001 Bass. That’s a very rare 1971 Rickenbacker Bass. There were only 20 of those made in '71. It's very rare and very collectible. Growing up on Paul McCartney and Chris Squire from YES, Geddy Lee. You dream of instruments of that. Then when you find one, it's like, 'Well this is going on the song.' That means a lot, man. Dreaming about those instruments as a little kid and actually having one and using it on a song that you put together. It means a lot."

As for the song itself, the bassist reveals, "That was an idea I had. I just wanted to have something. I started out on guitar and went to bass out of necessity. I always write on guitar. I just wanted to come up with something that kind of had everything -- had great power chords, great stringy chords and parts to it. I was just feeling that one." DeLeo says after presenting it to the rest of the band, everyone started digging the track and once Chester Bennington added his vocals, it was exactly what he was wanting to hear.

The Stone Temple Pilots With Chester Bennington 'High Rise' EP featuring 'Black Heart' is in stores now. You can pick it up at this location.