From the manufacturer:
High output humbucker built for aggressive playing styles. Recommended for old school metal, nu-metal, gothic, garage, punk, thrash and other heavy rock styles. Great for drop tunings.
Yields high output while retaining clarity. The massive ceramic magnet and hot coil windings deliver tremendous power and raw distorted rock sounds. More aggressive than the SH-5 Duncan Custom. Comes with four-conductor hookup cable.
Available for both neck and bridge positions. Often a Distortion bridge is paired with an SH-2n Jazz Model in the neck for good clean tones and versatility.
For balanced and warm instruments. Works especially well with rosewood fingerboards.
Nickel or gold-plated cover. Trembucker. 7-string version.
John Connolly / Sevendust (bridge), Jerry Horton / Papa Roach (bridge), Meegs Rascon / Coal Chamber (bridge), Wayne Static / Static X (bridge), Eric Peterson / Testament (bridge)
Magnet type: large ceramic bar, D.C. Resistance 12.7k-neck, 16.6k-bridge"
Best videos/sound clips:
Here we have the positively epic 2012 Seymour Duncan 12-way bridge metal pickup shootout in all its glory! The top video is the "rapid fire" comparison (2 min total), and the bottom video is the 15 minute in-depth comparison. I've included these videos here as the SH-6 is in the video (middle row second from the left). What's great is that you get to hear the same song being played on the same guitar by the same player. The licks are tasteful and it's mic'd well. Now as a critique, the mix is pretty heavy and with the bass and kick drum I find it hard to tell much about the quantity/quality of the bass output of these pickups. My take on this video though: All of these pickups do a good job – really you could play metal with any of these and be happy. Note: As this is an older video it is missing the Black Winter, Pegasus, and Nazgul bridge humbuckers.
The player is Keith Merrow and the song is "Pillars of Creation". Keith is playing a Strictly 7 Guitars "Cobra" Baritone 6-string 27.5" scale guitar through a Rhodes Colossus H-100 head.
Below is the 2015 update of the SD metal pickup comparison - 17 minutes of glory!
Ola Englund here is playing a S7G Solar6 guitar with Duncan Distortion neck/bridge into the Randall Satan amp and a Nomades 2x12 cab mic'd with a Shur SM57. The video is well played and recorded and although it is heavy metal like the videos above, it shows another player/guitar/amp/take on the pickup.
canaryreicyan here compares the venerable JB trembucker (TB-4) to the Distortion trembucker (TB-6). The microphone used is on the video recorder, so the sound quality is a bit lower than I'd usually include and there is more string noise than I like in a video, but the playing is good, the comparison is good, and he is playing snippets of songs we all know, all of which bumps this video up. The player also shows the amp settings used at the top of the video, which is helpful. The amp used is a Peavey 5150 head played into a Mesa Boogie 4x12 (4FBBR) slanted cabinet.
Gerson Guzman also compares the JB to the Distortion in the below video. He plays LTD EC1000 and LTD EC1000T guitars through a Mesa Single Rectifier in "vintage" mode into a cab with a Celestion Seventy 80 speaker. He also uses a Fullton OCD v1.7 boost pedal. I really like that the same riffs are repeated for each pickup and that they are tied together without breaks.