with Symphony X using ESP M-II Deluxe guitars with EMG Active pickups, and later switching to the DiMarzio Tone Zone and X2N pickups. In 2005, Romeo was introduced to Caparison by Henrik Danhage of Evergrey. Caparison developed a custom model Dellinger Prominence-MJR, which Romeo has since used as his primary guitar. The guitar was used to record the 2007 Symphony X album Paradise Lost, and all subsequent releases from the band. In terms of amplification, in the studio Romeo has used Mesa Boogie Triaxis amplifiers, before switching to the ENGL Fireball around the time of Symphony X's The Odyssey. Romeo has continued to use ENGL's Fireball and Powerball amplifiers in the studio and for live performances. Throughout his career, Romeo has also used various Line 6 and Marshall amplifiers. In terms of effects for live performances, Romeo pairs his various amplifiers with a TC Electronic "G System", a Boss NS2 Noisegate, an Ibanez Tube Screamer and a Boss Acoustic Simulator. Solo and guest work In 1994, Romeo's solo debut The Dark Chapter was released. In 1995, Long Island Records of Germany released the self-titled debut Phantom's Opera album featuring Romeo on lead guitar, Colie Brice on vocals, Bob Nelson on drums, Eric Walz on bass, and founding member Jack Young on keyboard and piano. The album was reissued with bonus tracks by Rewind in the US in 1999. In 1999, Romeo provided all guitar and bass parts on The Last Viking, the third studio album from Johansson brothers Jens and Anders. In 2000, Romeo played a guest solo on the song "Dawn of a Million Souls" from Ayreon's album Universal Migrator Part 2: Flight of the Migrator. Romeo has been a frequent guest collaborator with Arjen Lucassen, having also contributed guest solos on the songs "E=MC²" from Ayreon's 2008 release 01011001, and "Fate of Man" from Star One's 2022 release Revel in Time, a side project of Lucassen's. In 2002, Romeo provided guitar parts for five songs from Kotipelto's Waiting for the Dawn. He would go on to provide guitar work on seven songs from their 2004 followup, Coldness. In 2003, Redemption's self-titled release featured contributions from Romeo on the first four songs of the album. In 2004, Romeo contributed guitar work for Vitalij Kuprij on his song "Piano Overture" from the album Forward and Beyond. In 2005, Romeo provided guitar, bass and orchestration for eight songs from Symphony X