Next come three "experimental" impulses. Much can be done to impulses; what we did in impulses 08–10 was use guitar cab speakers for mid- and high-frequency response and leave the low end direct. Or, to be exact, not quite direct but the way they do it in studios: a mild cutoff of anything below 40Hz and an almost uniform response till 1000Hz. Generally speaking, these impulses are a sum of a DI low frequency signal and a guitar cabinet signal. There are no phase issues, so the notes you play won't suddenly disappear.
• 08 ElectroVoice EVM12L by Shift Line: ElectroVoice EVM12L is a legendary speaker used both in bass and in guitar cabs. Its response is mixed with the clean signal in this impulse. We used an Oktava 012 mic in several positions (to emulate a large cab) and mixed them in with the main position: at the center of the speaker. There's a mild roll-off below 30Hz.
• 09 Orange PPC212 bass edition by Shift Line: An impulse of Jim Root's signature cab adapted for bass. The impulse was recorded through a Marshall power amp with EL84 tubes; presence is boosted a little, and "deep" is engaged. We didn't have to mix in much DI signal: it already sounded like true rock'n'roll. There's a roll-off below 40Hz along with the traditional Marshall peak at 80Hz.
• 10 Celestion V30 bass edition by Shift Line: A classic guitar solution used for bass. There's a roll-off below 30Hz. The guitar cab gets prominently mixed in starting around 700Hz. We used a Sennheiser 906e mic positioned at the center of the speaker, 15cm from the cone. This impulse works great for guitar distortion pedals used on bass.