This is a comparison of a 1990 MIJ BOSS BF-2 Flanger and a TC Electronic Thunderstorm. I created seven different flanger sounds to compare the pedals. The effects created with the flangers are - 1. A chorus effect on an arpeggiated guitar part, varying the RATE. 2. A flanger sweep on a lightly overdriven rhythm guitar part. The overdrive comes from an MXR 'Duke of Tone' placed in front of the flangers. Varying the RATE. 3. A rotary / vibrato effect. 4. A hybrid phaser / flanger effect. 5. The longest, deepest most resonant sweep both flangers can create. 6. A highly resonant filter effect. Much more a special 'effect' than musical. 7. A double tracked guitar effect. Using the flangers to give a lead guitar track a pseudo double tracked guitar sound. Similar to ADT (automatic double tracking) I've owned and used the BOSS BF-2 pedal featured in the video since 1990 and the TC Electronic Thunderstorm has a sound very close to it. I wanted to find out just how close they are. A guitar track is being re-amped through both pedals. Each pedal is compared with the same guitar, the same performance and signal path. The final re-amped guitar with flanger is mixed into the track. The pedals are going into the front of a Laney Lionheart L20H head (clean channel) and then into a 2 x 12 Celestion impulse response (G12M Greenback). I used the bridge pickup on a USA Fender Stratocaster for all the guitar parts, except for the solo. This is is an Epiphone 50's Les Paul with the front pickup is selected and again with an MXR 'Duke of Tone' placed in front of the flangers. The Bass is a Fender Player JazzBass. 00:00 Introduction, no effect 00:13 1. Chorus effect RATE varied 00:53 2. Flanger sweep, RATE and DEPTH varied 01:36 3. Rotary / Vibrato effect 02:01 4. A phaser / flanger effect 02:23 5. The longest, deepest most resonant sweep. RATE and DEPTH varied 03:20 6. A resonant filter special effect 03:40 7. A doubled guitar effect 04:33 Outro, no effect