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Package Includes:
(1) Celestion PowerProX18 8 ohm 2400w 18" Subwoofer w/Ferrite Magnet+4" Voice Coil
(1) Rockville SONIC-50L Large Portable Bluetooth Party Speaker, Big Bass/LED/Mic In
Description of PowerProX18 8 ohm:
18-inch, cast aluminum chassis, ferrite magnet LF loudspeaker.
Features:
PowerProX speakers are built for maximum performance and reliability throughout the lifespan of each speaker
Dynamic airflow venting delivers class-leading heat management with an average 20C lower voice coil temperature
Polysiloxane laminated dual suspension provides greater stability and improved cone displacement symmetry
Aluminium demodulation ring reduces harmonic and intermodulation distortion caused by voice coil displacement
Double-sided, weatherproof cone coating for moisture protection and enhanced durability
Specifications:
Nominal diameter: 457mm / 18in
Power rating: 1200W
Continuous power rating: 2400W
Rated impedance: 8?
Sensitivity: 97dB
Frequency range: 35-1000Hz
Chassis type: Cast aluminum
Magnet type: Ferrite
Magnet weight: 3.5kg / 124oz
Voice coil diameter: 100mm / 4in
Voice coil material: Round copper
Former material: Glass fibre
Cone material: Glass loaded cellulose, water-resistant coating front & back
Surround material: Cloth-sealed
Suspension: Dual-laminated
Gap height (Hg): 11.75mm / 0.46in
VC winding height (Hvc): 25mm / 0.98in
Parameters:
Sd: 1210.0cm2 / 187.6in2
Fs: 34.8Hz
Mms: 229.98g / 8.1oz
Qms: 3.147
Qes: 0.431
Qts: 0.379
Re: 5.1O
Vas: 188.9l / 6.67ft3
BI: 24.38Tm
Cms: 0.091mm/N
Rms: 15.96kg/s
Le (at 1kHz): 1.61mH
Xmax: 9.5mm / 0.37in
Xmech: 48mm / 1.9in
Efficiency ?0: 1.8%
Mounting Information:
Overall diameter: 460mm / 18.1in
Overall depth: 225mm / 8.9in
Cut-out diameter: 414mm / 16.29in
Mounting hole dimensions: 11x7mm / 0.43x0.28in
Number of mounting holes: 8
Mounting hole PCD: 441-432mm / 17.36-17.31in
Flange & gasket thickness: 16.2mm / 0.64in
Unit weight: 13.2kg / 29.1lb
Measurement Note:
Power rating: Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.
Continuous power rating: Defined as 3dB greater than the AES rating.
Sensitivity: Measured on axis at 1W, 1m in 2p anechoic environment.
Parameters: Measured after unit subjected to pre-conditioning signal.
Xmax: 0.5*(Hvc-Hg) + 0.25*Hg
Xmech: Maximum peak-to-peak excursion before damage.
All About Your SONIC-50L:
How To Set Up Your SONIC-50L:
Inputs, Buttons, and Controls Explained on Your SONIC-50L:
How To Set TWS on the SONIC-50L:
How To Set Up Karaoke on Your SONIC-50L:
What's in the box:
Bluetooth Speaker
USB Type-C Charging Cable
3.5MM to 3.5MM aux Cable
How-to video card showing you how to use the product
Description:
The Rockville SONIC-50L is a large and loud portable Bluetooth speaker that delivers deep bass and great frequency response. This speaker is engineered to produce an extremely pleasant sound curve that is sure to impress. With large-sized speakers and 2 passive bass radiators, this device is capable of producing deep bass frequencies and very loud overall volume. The TWS - True Wireless Stereo Linking feature allows you to connect two speakers wirelessly for an even more immersive audio experience.
The Rockville SONIC-50L is powered by a 50 Watts stereo sound (25w x 2) amplifier and includes two 3" 4 ohm full range speakers and two passive bass radiators for lows. The 7.4V/5000mAh battery lasts up to 24 hours at low volume, and up to 6.5 hours at max volume. The device also features dual LED rings with 4 Sound-Activated LED modes that add a touch of style to your music experience.
This speaker is IPX5 water-resistant rated, making it perfect for both indoor and outdoor use. The Bluetooth 5.2 chipset ensures a stable and reliable connection with any Bluetooth-enabled device such as iPad, iPhone, Laptops, Android phone, and other devices. The speaker also features a built-in TF card slot and USB playback that supports cards or sticks up to 32GB. It plays MP3, WMA, FLAC, WAV, SBC, PCM, CVSD, G729 audio file types.
The Rockville SONIC-50L also features a 3.5MM aux input and a microphone input that allows you to connect your microphone and sing along to your favorite tunes. The digital LED display shows you the battery level status, mode, volume level, and Bluetooth connection status. The metal roller volume adjustment allows you to adjust the volume with ease. The device also features fast charging time of 2-3 hours and charges with the included Type-C USB cable.
The Rockville SONIC-50L has all your basic control buttons such as play, pause, skip forward, skip back, and mode. It will also control the next song, pause, play on popular apps like Pandora, Spotify, and others. The device has a 35 Foot Maximum Bluetooth Range and comes with a carry handle for easy portability. The product dimensions are 12.25" L x 5." W x 7.8" H (Height NOT including the handle is 5.8”) and the product weight is 4.59 lbs. The device comes in black color.
With its impressive features and capabilities, the Rockville SONIC-50L is the perfect portable Bluetooth speaker for anyone who wants to enjoy their music on the go. Whether you’re at home, at the beach, or on a camping trip, this speaker will provide you with an immersive audio experience that you won’t forget.
Features:
Rockville SONIC-50L Large and Loud Portable Bluetooth Speaker With Deep Bass and Great Frequency Response
Extremely pleasant sound curve
Large size speaker for deep bass frequencies and very loud overall volume
TWS - True Wireless Stereo Linking of 2 speakers
Power: 50 Watts stereo sound (25w x 2)
(2) 3" 4 ohm full range speakers + (2) passive bass radiators for lows
7.4V/5000mAh battery lasts 24 hours at low volume, and up to 6.5 hours at max volume
Dual LED rings with 4 Sound-Activated LED modes
IPX5 Water resistant rating makes this perfect for outdoor and indoor use
Bluetooth 5.2 chipset
Built in TF card slot and USB playback (supports cards or sticks up to 32GB)
Plays: MP3, WMA, FLAC, WAV, SBC, PCM, CVSD, G729 audio file types
3.5MM aux input
Microphone input
Digital LED displays battery level, mode, volume level
Metal roller volume adjustment
Fast Charge Time: 2-3 Hours
Battery charges with included Type-C USB cable
Frequency Response: 55Hz - 20KHz
Play, Pause, Skip Forward, Skip Back, Volume Up, Volume Down
Will control next song, pause, play on popular apps like Pandora, Spotify, and others
35 Foot Maximum Bluetooth Range
Compatible with any Bluetooth devices such as iPad, iPhone, Laptops, Android phone, other cell phones, iPods, other Bluetooth MP3 Players
Carry Handle
Rubber input cover for increased water resistance
Product Dimensions (Inches): 12.25" L x 5." W x 7.8" H (Height NOT including the handle is 5.8”)
Product Weight: 4.59 lbs.
Color: Black
Generating expert take…
Celestion traces its origins to 1924 in Hampton Wick, on the outskirts of London, where Cyril French and his brothers founded the Electrical Manufacturing and Plating Company. Tasked with refining Eric Mackintosh's early cone loudspeaker invention—a bamboo-reinforced "free-vibrating edge" design—they patented it that year and named their breakthrough product the Celestion. By 1928, the firm had incorporated as Celestion Ltd., adopting the motto "The Very Soul of Music" amid rapid expansion into radiogram speakers and cabinets, before acquisitions by British Rola in 1946 and later Truvox reshaped its trajectory.
The brand specializes in loudspeakers, with a legacy rooted in innovative drivers for radios, hi-fi systems, and professional audio. Iconic models like the G12 series, first developed in 1936 and toughened into the 1959 T530 Alnico Blue—the world's inaugural guitar amp speaker—cemented its prowess. Today, Celestion produces pro audio loudspeakers, guitar cabinets, and replacement drivers, emphasizing precision engineering for sound reinforcement and instrument amplification, all manufactured under ISO standards within the Gold Peak group.
Celestion commands a revered position as a vintage-inspired leader in the guitar and pro audio markets, prized by musicians and engineers for its punchy, articulate tone that defined rock legends from the 1960s onward. Neither purely high-end boutique nor mid-tier commodity, it blends heritage craftsmanship with reliable performance, appealing to discerning hi-fi buyers and tone chasers who value century-tested innovation over fleeting trends.
See all Celestion listings on RADAR.
