ETC/Elec Theatre Controls 42550J
25º-50º Source Four jr Zoom in Black WITHOUT Terminating Connector

OUR PART #  S4JR-25/50

Our Price: $270.66
List Price: $370.00
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If you're looking for the field-angle versatility of a zoom ellipsoidal with the affordability and design of a smaller fixture, then you're looking for the Source Four jr Zoom. Great for applications on the small stage or in clubs, retail events and industrials, the Source Four jr Zoom boasts rugged ETC fixture construction and all the celebrated precision optics of a Source Four.

NOTE: This Source Four jr Zoom is unterminated.

ETC 42550J Features:

  • 25º-50º Zoom
  • Rated up to 575W
  • Super-efficient HPL lamp
  • Faceted dichroic reflector removes 90% of IR heat from beam
  • Two-plane stainless-steel shutter blade assembly
  • Tool-free lamp adjustment
  • Rugged die-cast aluminum construction
  • Supports ETC Dimmer Doubling™

ETC 42550J Specifications:


  • Rugged die cast aluminum construction
  • 20 gauge stainless steel shutters in a bi-plane assembly
  • High impact, thermally insulated knobs and shutter handles
  • Two accessory slots, and a top mounted, gel frame retainer
  • Steel yoke with two mounting positions
  • Positive locking, hand-operated yoke clutch
  • Slot for glass or stainless steel patterns
  • Slot with sliding cover for motorized pattern devicesor optional iris
  • UL and cUL Listed


  • 115-240V, 50/60Hz
  • High temperature 3-conductor 36” leads in a glass fiber outer sleeve
  • Supports ETC Dimmer Doubling™ technology


  • 575W maximum
  • HPL – compact tungsten filament contained in a krypton filled quartz envelope (see table for suitable lamp types)
  • Patented filament geometry provides extremely efficient light collection and transmission
  • Integral die cast aluminum heat sink lamp base


  • Optimized optical system for efficient photometric performance
  • Two bi-convex lenses
  • Faceted borosilicate reflector with dichroic cold mirror coating removes greater than 90% infrared radiation (heat) and reflects greater than 95% of visible light
  • Reflector secured with anti-vibration shock mounts
  • Tool free, positive locking X, Y and Z lamp centering adjustments, unaffected by relamping
  • Beam edge continually adjustable hard-to-soft

NOTE: ETC Source Four jr Zooms are supplied with c-clamp, color frame, and 3’ (96cm) leads as standard.

SmartStand Caster Kit, 3 packETC/Elec Theatre Controls ST-C SmartStand Caster Kit, 3 pack

This accessory is a set of three locking casters for the SmartStand crank-up lighting support unit.

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115V/575W LampOsram Sylvania HPL575/115X 115V/575W Lamp

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Black Top Hat, 5" TubeETC/Elec Theatre Controls 400TH Black Top Hat, 5" Tube

This accessory is a black Top Hat with a 5" tube that intended to be used with 19-50 degree Source Four and Source Four jr fixtures.

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C-Clamp for ETC Fixtures, BlackETC/Elec Theatre Controls 400CC C-Clamp for ETC Fixtures, Black

This C-Clamp from ETC is useful for mounting and locking lighting fixtures to a grid pipe and includes an M12 thread screw for the fixture yoke.

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Edison Connectors, 15A Male PGB (NEMA 5-15P)Altman 52-5266C Edison Connectors, 15A Male PGB (NEMA 5-15P)

15 Amp, 125 Volt, NEMA 5-15P, 2P, 3W, Plug, Straight Blade, Industrial Grade, Grounding. Black/White.

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30" Source Four Safety Cable in BlackETC/Elec Theatre Controls 400SC 30" Source Four Safety Cable in Black

This black safety is 30" in length and is a useful Source Four fixture accessory.Specifications: Cable is a 30" long, 1/8" diameter black wire rope cable with snap clamp fitted. The safety ratio of the cable is 5:1 The breaking load ...

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Pattern Holder - M SizeETC/Elec Theatre Controls 400PH-M Pattern Holder - M Size

This Source Four accesorry is a M size pattern holder for Source Four jr fixtures.Specifications:  X = 2.12” Y = 2.75”

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DonutETC/Elec Theatre Controls 400DN Donut

This Source Four fixture accessory is a 6.25-inch donut that controls flare in template projections.NOTE: Use A-size pattern holder with Source Four for maximum pattern effectiveness.

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Color Frame for the Source FourETC/Elec Theatre Controls 400CF Color Frame for the Source Four

Product shown in image is for illustrative purposes only. Actual product may vary in appearance.Color Frame for the Source Four.

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SmartStand With Adapter in BlackETC/Elec Theatre Controls ST SmartStand With Adapter in Black

A ‘mini rig’ for SmartBars and Source Fours! ETC’s SmartStand is a perfect complement to ETC’s SmartBars and Source Four fixtures. Easily loaded with a dimmer bar and lighting fixtures, this collapsible, crank-up stand works like a ...

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Drop In Iris for Source Four JrETC/Elec Theatre Controls 400JRS Drop In Iris for Source Four Jr

Drop In Iris for Source Four jr and jr Zoom fixtures.

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5" Gel ExtenderETC/Elec Theatre Controls 400GE 5" Gel Extender

This Source Four accessory is a black Gel Extender that measures 5x6.25x5 inches. By placing your gels further away from your fixture's gel plane you'll get better gel life.

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SmartStand Adapter StudETC/Elec Theatre Controls ST-A SmartStand Adapter Stud

This accessory is an additional adapter (stud) - 1/2"-13, for the SmartStand crank-up lighting support unit.

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Black Half HatETC/Elec Theatre Controls 400HH Black Half Hat

This Source Four accessory is a black Half Hat that measures 7x7x6 inches. Like the Top Hat this unit helps to control and reduce flare but from one side only.

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