JBL Professional Control 28-1L High-Output Speaker User Manual
- June 13, 2024
- JBL Professional
Table of Contents
JBL Professional Control 28-1L High-Output Speaker
Key Features
Components
- 8” woofer with woven fiberglass cone
- 1” PEI diaphragm tweeter with fluid cooling
- Contemporary, high-design appearance
- Built-in InvisiBall® mounting hardware, plus available U-bracket
- Weather-resistant enclosure and transducers
- Wide 100° x 100° coverage
- 120 Watt power handling (240 Watt program)
- A high-fidelity sound character with a broad frequency response of 45 Hz – 20 kHz
Description
The Control 28-1L is a two-way 8” speaker with rich sonic character, wide coverage, consistent coverage, versatile mounting, and a contemporary high- design look that fits into a wide range of decors,
This makes Control 28-1L an excellent choice for a wide variety of applications, including retail stores, restaurants, health clubs, theme parks, educational facilities, hospitality, music cafes, leisure venues, and anywhere where a top-quality high-output indoor/outdoor foreground/ background music (and/or paging) speaker is required.
The unique InvisiBall mounting hardware is included in each system, making short work of permanent installation. The InvisiBall mounting method provides a high degree of both vertical and horizontal rotation, and because InvisiBall adjustments are made through a hidden access behind the logo badge, the grille never needs to be removed and there exists a high degree of theft deterrence as well. Integrated M6 mounting points for an optional U-bracket add to the installation versatility.
The LF driver’s woven fiberglass cone provides durability and weather-capable performance. The light weight high-temperature fiberglass voice coil former and high-temperature voice coil wire ensures stable performance under long- term high-power working conditions while also providing high sensitivity and high power capability. The pure butyl rubber surround delivers clean sound and ruggedness while terminating its circumference in JBL’s WeatherEdge™, a seamless, rubberized extension of the woofer surround that provides added protection to critical transducer elements. Cone geometry is optimized for smooth frequency response and good off-axis performance, while an FEA- optimized motor construction and linear suspension spider help to lower harmonic distortion.
The HF driver’s low viscosity ferromagnetic fluid increases voice coil cooling for higher long-term power handling. The PEI diaphragm delivers a smooth frequency sound quality. A lightweight Kapton™ voice coil former increases durability while providing better high-frequency response extension. All these factors also contribute toward making the driver especially rugged for outdoor and other stressful applications. In addition to the driver designs contributing toward a high degree of weather resistance, the cabinet provides excellent endurance against sun, salt, and moisture. Grilles are heavily zinc- plated and finished in a tough, high-grade powder coating for rust resistance, and optional MTC-28WMG-1 WeatherMax™ grilles are available for especially difficult environments and to break up driving rain. Connection is made via weather-capable screw-down terminals, and the optional MTCPC2 and MTC-PC3 panel covers are available to protect the terminal compartment, providing a water-tight sealed gland-nut entrance (when used with round-jacketed cable within the specified diameter range). The frequency response is extremely smooth, resulting in a very natural sound character, and the response extends down to 45 Hz, providing strong bass capability. The system is capable of handling 120 Watts continuous pink noise (240 Watts program). The combination of high sensitivity and power handling provides a high maximum SPL of 112 dB. The Control 28-1L readily accepts a variety of paints and finishes to match any décor. Available in black or white (-WH).
Specifications
System:
- Frequency Range (-10 dB): 45 Hz – 20 kHz
- Frequency Response (±3 dB): 62 Hz – 16 kHz
- Power Rating:
- 240W Continuous Program (2 hrs)
- 120W (480W peak), Continuous Pink Noise (2 hrs)
- 90W (360W peak) Continuous Pink Noise (100 hrs)
- Maximum Input Voltage: 27.5 V RMS (2 hrs), 55.0 V peak
- Maximum SPL: 112 dB ave. Continuous Pink Noise (118 dB peak)
- Sensitivity: 91 dB, 1W/1m (ave. 100 Hz – 10 kHz)
- Coverage Angle: 100° x 100°
- Directivity Factor (Q): 7.3 (averaged 1 kHz – 16 kHz)
- Directivity Index (DI): 8.3dB (averaged 1 kHz – 16 kHz)
- Nominal Impedance: 8 ohms
- Crossover Type: 2nd order low-pass, 1st order high-pass, plus conjugate shaping
Circuitry:
- Recommended Protective High-Pass: 45 Hz high-pass (24 dB/oct)
Transducers:
- Low Frequency:
- 200 mm (8 in), woven fiberglass cone with pure butyl rubber surround with Weather-Edge frame protection
- High-temp fiberglass voice coil former
- High-temp voice coil wire
- Optimized cone geometry
- Linear suspension spider
- FEA-optimized motor structure
- High Frequency:
- 25 mm (1 in) PEI diaphragm
- Low-viscosity ferromagnetic fluid
- Lightweight Kapton™ voice coil former
Physical:
- Enclosure Material: High Impact Polystyrene (HIPS) with 10% glass fill, painted with highly UV resistant paint on white (-WH) version for maximum UV fade resistance
- Grille: Highly zinc-plated, finished in durable TGIC polyester powder coating. MTC-28WMG-1 (&-WH) is available with WeatherMax™ multi-layer foam and tight-weave mesh vapor barrier backing.
- Installation: InvisiBall wall-mounting system included. Two 6 mm attachment points (on top and bottom) for optional MTC-28WMG-1 (&-WH) U-bracket. Secondary safety attachment loop point on the back panel.
Environmental:
- IP Rating: IP-44 per IEC529 (IP-55 when installed with the optional MTC-28WMG-1 WeatherMax™ grille and either MTC-PC2 or MTC-PC3 panel cover.) Exceeds MilSpec 810 for humidity, salt spray, temperature & UV. Passes MilStd-202F for salt spray and ASTM G85 for acid-air plus salt spray. Optional MTC-28WMG-1 WeatherMax™ grille for breaking up driving rain and for especially difficult environments.
Termination:
- Screw-down terminal strip, zinc-plated copper-based, nickel-plated metal screws and washers. Accepts up to 9 mm outside and 4 mm inside open lugs (#6, #8, or #10 lug), plus bare wire (up to 12 AWG / 2.5 mm2). Optional MTC-PC2 and MTC-PC3 protective panel covers are available to provide a sealed entrance for additional weather protection.
Agency Rating: ROHS-compliant
Colors: Black (RAL9004) or white (-WH, RAL9016)
Dimensions:
- 386 x 282 x 219 mm (15.2 x 11.1 x 8.6 in); 277 mm (10.9 in) deep total when mounted on InvisiBall wall-mount bracket
Net Weight (each): 6.2 kg (13.5 lbs)
Shipping Weight (pair): 13.4 kg (29.5 lbs)
Included Accessories:
- InvisiBall™ wall-mounting system
- 6 mm x 180 mm hex key
Optional Accessories:
- MTC-28UB-1 – Yolk-type U-bracket (&-WH)
- MTC-28WMG-1 – WeatherMax grille with backing (&-WH)
- MTC-28/25CM – Ceiling-Mount InvisiBall adapter (&-WH)
- In half-space (on-wall, 2pi)
- Continuous Pink Noise rating is IEC-shaped pink noise with a 6 dB crest factor. Continuous Program Power is defined as 3 dB above the Continuous Pink Noise Rating and is conservative expression of the system’s ability to handle normal speech and music program material.
- Calculated from sensitivity and power handling, exclusive of power compression
- Half-space (on-wall) averaged 100 Hz – 10 kHz, 2.83V
- The coverage angle (-6 dB) averages between 600 Hz and 12 kHz
- For protection against driving below resonant frequency and to keep the transformer out of saturation
- In vertical orientation, JBL continually engages in research related to product improvement. Changes introduced into existing products without notice are an expression of that philosophy.
Mounting Dimensions
Dimensions in mm (inches)
Frequency Response
On-axis in half-space (2pi, solid line) and full-space (4pi, dotted line), input impedance
Beamwidth vs. Frequency
© 2019 Harman International. www.jblpro.com
FAQs
What is the description of the JBL Professional Control 28-1L Speaker?
The Control 28-1L is a two-way 8” speaker with rich sonic character, wide coverage, versatile mounting, and a contemporary high-design look. It is suitable for various applications, including retail stores, restaurants, health clubs, theme parks, educational facilities, hospitality, music cafes, leisure venues, and more. It features InvisiBall mounting hardware for easy installation.
What are the unique features of the InvisiBall mounting hardware?
The InvisiBall mounting hardware provides a high degree of both vertical and horizontal rotation. Adjustments are made through a hidden access behind the logo badge, eliminating the need to remove the grille. This design also enhances theft deterrence. Integrated M6 mounting points for an optional U-bracket add to the installation versatility.
How is the speaker designed for weather resistance?
The LF driver’s woven fiberglass cone provides durability and weather-capable performance. It also has a butyl rubber surround with WeatherEdge™ protection. The cabinet is designed to endure sun, salt, and moisture. Grilles are heavily zinc-plated and finished in a high-grade powder coating for rust resistance.
Is the Control 28-1L Speaker suitable for outdoor use?
Yes, it's designed for both indoor and outdoor use, thanks to its weather- resistant features.
What are the available color options for the Control 28-1L Speaker?
It is available in black (RAL9004) or white (-WH, RAL9016).
How can I install the Control 28-1L Speaker?
The speaker comes with InvisiBall wall-mounting hardware included. It also has attachment points for an optional U-bracket for added installation versatility.
Does it come with any additional accessories?
Yes, it includes InvisiBall™ wall-mounting system and a 6 mm x 180 mm hex key. Optional accessories like U-brackets and WeatherMax grilles are also available.
What is the power handling capacity of the Control 28-1L Speaker?
It can handle 120 Watts continuous pink noise (240 Watts program) and delivers a high maximum SPL of 112 dB.
Can I use the Control 28-1L Speaker for both music and paging purposes?
Yes, it's suitable for both high-quality music playback and paging applications, making it versatile for various settings.
What is the IP rating of the Control 28-1L Speaker, and what does it mean?
The speaker has an IP-44 rating per IEC529 (IP-55 when installed with the optional MTC-28WMG-1 WeatherMax™ grille and either MTC-PC2 or MTC-PC3 panel cover). This rating indicates that it offers protection against dust and water ingress, making it suitable for outdoor use and challenging environments.
Can I paint or customize the appearance of the Control 28-1L Speaker to match my decor?
Yes, the Control 28-1L readily accepts a variety of paints and finishes, allowing you to customize its appearance to match your decor.
What is the role of the low viscosity ferromagnetic fluid in the HF driver?
The low viscosity ferromagnetic fluid in the HF driver increases voice coil cooling, enabling the speaker to handle higher long-term power while maintaining audio quality.
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