The Ultimate Support JS-SRR100 JamStands (JS-SRR100) is a rolling studio rack stand designed for live, studio, or stage setups where you need your gear mounted, accessible, and mobile.

Key overview

• Rack capacity: 21U total (12U top + 9U bottom)
• Build: Heavy-duty steel frame
• Mobility: 4 casters (2 lockable)
• Top section: Angle-adjustable rack bay
• Compatibility: Standard 19-inch rack gear
• Included: Rack mounting hardware
• Weight: ~11.7 kg (25.8 lb)

Physical size

• Height: 45 in (114.3 cm)
• Width: 22 in
• Depth: 21.5 in

What it’s used for

This stand is popular for:

• Audio interfaces + effects racks
• Live DJ or synth setups
• Small studio recording rigs
• Portable FOH or stage racks

The angled top 12U section is especially useful for:

• Mixers (like Mackie or Yamaha compact desks)
• Patch bays or processors you need to access quickly

Fit questions (important)

• 3U gear: Yes, fits normally (no issue stacking in either section)
• Non-standard gear: Only works if it’s true 19” rackmount width
• Heavy units (amps, power amps): Best placed in the lower fixed 9U section for stability

Real-world note

Users commonly report:

• It holds a fully loaded rack without flex issues
• Top angled section is ideal for mixers but can feel “tight” if you fill it completely with deep gear
• Assembly is straightforward but a bit fiddly when attaching the rotating/angled frame