Daktronics lane speakers

Daktronics, Inc., of Brookings, South Dakota, equips its HS-200 Horn Start with an under-block lane speaker, 4J model 306-45-54 (catalog number DS-1059), one behind each starting block. The HS-200 drives up to ten of them from a dedicated lane output with its own sealed volume control.¹² As with the Colorado Time Systems equivalent, the horn itself is not made by Daktronics: the 306-45 is the reflex horn made by Fourjay Industries of Dayton, Ohio. The HS-200’s auxiliary and backstroke speakers are covered in the HS-200 article; shared background on lane speakers is in the external-speakers overview.

Design and construction¶

The lane speaker is the Fourjay 306-45, the 45 ohm version of Fourjay’s 306 Series reflex horn, the same horn Colorado Time Systems sells as its SP-6/45.³ Daktronics designates it 306-45-54; the owner’s manual does not define the trailing 54, which most likely records a cable length but is unconfirmed.¹ The 45 ohm impedance is what allows the several lane speakers to share the lane output on the start system.³

Daktronics installs each lane speaker tilted downward so that water drains out of the horn rather than pooling inside it, and offers speaker extension cords in lengths from 10 ft to 200 ft (3 m to 61 m) to reach the blocks.¹ The horn is built from impact- and UV-resistant ABS with stainless-steel fasteners and a moisture-resistant reflex driver.³

Specifications¶

The lane speaker’s ratings are Fourjay’s for the 306-45; Daktronics does not publish separate figures.³

Daktronics designation	306-45-54 (catalog DS-1059)
OEM model	Fourjay 306-45
Type	Reflex horn
Power handling	6 W continuous
Impedance	45 Ω
Frequency range	400–5000 Hz (±3 dB)
Sound pressure level	97 dB (1 W/1 m)
Construction	Impact- and UV-resistant ABS; stainless-steel fasteners
Weight	1.25 lb (0.57 kg)

Part numbers and accessories¶

• 306-45-54 (DS-1059), under-block lane speaker (Fourjay 306-45); up to ten per HS-200.¹
• Speaker extension cords, 10 ft to 200 ft.¹

See also¶

• External speakers: the shared overview and the OEM horn both major makers use
• Colorado Time Systems lane speakers: the same Fourjay horn under a CTS part number
• HS-200 Horn Start: the Daktronics start system that drives the speakers, and its auxiliary and backstroke speakers
• OmniSport 2000: the timing console paired with the HS-200
• Equipment: the equipment reference

References¶

Footnotes¶

1. Daktronics, Horn Start HS-200 Owner’s Manual (ED-12935, Rev 17, 17 March 2021) (lane output for up to ten lane speakers, 4J model 306-45-54, tilted to drain; lane speaker catalog number DS-1059; speaker extension cords 10 to 200 ft). ↩ ↩² ↩³ ↩⁴ ↩⁵

2. Daktronics, OmniSport HS-200 Product Specifications (SL-05774, 2017) (dealer-hosted copy; outputs for up to ten lane speakers with sealed volume controls). ↩

3. Fourjay Industries, The Little Big Horn: 6 Watt Reflex Horn Speaker, 306 Series (Form 360-02) (306-8 and 306-45 impedance options; power, frequency, and sound-pressure specifications; ABS and stainless construction). ↩ ↩² ↩³ ↩⁴