specifications

  • Brand :Crossrock
  • Material: PE
  • Fitted Instrument: 4U-21IN
  • Package Dimensions: 59.5x71.5x26.5cm (23.4x28.15x10.4in)
  • Shipping Weight:12kg (26.5lb)
  • Net Weight: 11kg (24.25lb)
  • Accessories:Screws & screw adapters
Rack Cases

CRA9804U-550S 4U Professional 21″ Deep PE Molded Rack Case with Adjustable Rails 13.78″–18.7″

SKU: CRA9804U550

$279.99

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    • Free shipping around US continental for orders above $49
    • 1 - 2 business days handling time before shipping
    • 30 days money-back guarantee and limited lifetime warranty
    PRODUCT OVERVIEW
    The classic 4U amp rack — 2U amplifier, DSP and power conditioner — now with adjustable rails that set the depth from 13.78″ to 18.7″ (350–475 mm), so a 16-inch mixer and an amplifier share one case. The round- and square-hole rails ship with a screw adapter kit; the trolley handle and caster board (with trolley) are sold separately.
    INSIDE MEASUREMENTS
    WHO IT'S FOR
    • Touring and working bands — one case for the amp, the DSP and the power conditioner, with rails you can re-set when a new mixer or amp joins the rack.
    • Mobile DJs and event crews — a deep 4U that leaves room for the mixer above the amps, with the modular handle added when the load-in is long.
    • Church and install AV teams — a rack that lives in a closet but still travels, and adapts to whatever processor gets swapped in next year.
    • Backline and equipment rental — 4U is the size that leaves the warehouse most often; adjustable rails mean it always fits the gear going out this week.
    FEATURES
    • Adjustable Rails, 13.78″ to 18.7″ — The 4U amp rack's biggest weakness, fixed. Front and rear rails slide across a full 5-inch range (350–475 mm), so a mixer, an amplifier and a 1U processor each get the exact clearance they need — no dead space, no crushed connectors.
    • Round-Hole + Square-Hole Rails, Adapters Included — A mixer and an amplifier rarely share a screw standard. One rail is drilled with round threaded holes, the other with square holes for cage nuts, and the screw adapter kit converts either rail to match the hardware your gear shipped with — no drilling.
    • The Classic 4U Amp Rack, Built Deep — A 2U power amplifier, a 1U signal processor and a 1U power conditioner — the standard four-space loadout, in a case whose depth was designed around amplifiers instead of wireless receivers.
    • Mixer and Amplifier in One Case — Because the rails run to 18.7 inches, a 16-inch deep digital mixer can occupy the top of the rack while a power amplifier sits below it — a loadout that shallow 4U cases physically cannot build.
    • Dual-Point Mounting for Heavy Gear — Front and rear rails spread the load across four mounting points instead of two, which is what keeps faceplates flat and rack ears straight after a season of load-ins.
    •  Modular, Detachable Trolley Handle (Optional) — Add or remove the handle yourself, without tools. Order the case now and add the handle when the load-in gets long — you are not locked into buying a wheeled case up front. Shop the detachable trolley handle.
    • Stacks Loaded, Locks Together — Interlocking grooves lock a stack of loaded cases together so a van pack stays tidy, with the shell engineered to bear the weight above it.
    • Matching Trolley Board (Optional) — A companion board with a telescoping handle that works two ways — push a stack of cases in front of you, or pull them behind you like a hand truck. Shop the trolley caster board.
    • Dual-Wall Molded PE Shell + Watertight Gasket — A reinforced polyethylene body with molded corner protection, and a gasket seal that keeps rain, dust and stage-floor grit out of the rack.

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