Historical clue formulations

• Revs (up) — 2026-03-26
• Theater boxes — 2025-05-07
• Music boxes? — 2025-04-20
• AC units? — 2024-08-10
• Circuitry units — 2024-03-13
• P.A. gear — 2024-01-06
• Some sound equipment on stage — 2023-05-29
• Hypes (up) — 2022-04-26
• Electrical units — 2022-02-21
• Roadies' loads — 2021-01-27
• Some stage equipment — 2020-04-29
• Roadies' equipment — 2020-03-24
• Concert pieces — 2019-08-28
• Boxes in an arena, maybe — 2019-05-10
• Rock music boosters — 2018-10-08
• Gig gear — 2017-11-16
• Units in Ohm's law — 2017-09-22
• Concert lineup — 2017-07-08
• Band aids — 2017-06-04
• Jazzes (up) — 2016-11-27
• Hookups at a gig — 2016-11-05
• Some sound equipment — 2016-06-29
• Audio equipment — 2016-06-12
• Volume enhancers — 2016-05-09
• Tour gear — 2016-04-22
• Rock band boosters — 2015-12-21
• Energizes, with "up" — 2015-12-01
• Stack at a rock concert — 2015-10-06
• Charges (up) — 2015-08-31
• Ratchets (up) — 2015-08-30
• Concert pieces — 2015-08-02
• Sound investments? — 2015-01-06
• Hypes (up) — 2014-04-13
• Some concert gear — 2013-09-08
• Concert blasters — 2013-05-13
• Increases, with "up" — 2013-02-10
• Sound boxes at a concert — 2013-01-07
• Sound boosters — 2012-12-31
• Concert stage equipment — 2012-12-24
• Stereo parts — 2012-06-06
• Current units — 2012-03-06
• Concert pieces — 2012-01-27
• Concert stack — 2011-04-10
• Intensifies, with "up" — 2010-12-26
• They're schlepped on tours — 2010-07-25
• Roadies carry them — 2010-02-22
• Gear to help you hear — 2009-07-11
• Concert blasters — 2009-07-07
• Concert equipment — 2009-01-19
• Band boosters — 2008-12-10