SX28 Dual 8" Passive Subwoofer

Designed in Power & Flexibility

The SX/SA28, dual eight-inch subwoofer provides power and punch equal to most single 12 inch subs in a cabinet that is 2/3 the volume, making it very easy to integrate into any project. Large ports insure that this forceful bass is never marred by any chuffing or fluttering noises.

The SX/SA28, dual eight-inch subwoofer provides power and punch equal to most single 12 inch subs in a cabinet that is 2/3 the volume, making it very easy to integrate into any project. Large ports insure that this forceful bass is never marred by any chuffing or fluttering noises.

Sixteen, M10 Universal Mounting Points allow the SX/SA28 to be flown using M10 eyebolts, while the recessed handles, top-mounted pole adapter and available casters make portable use easy and practical.

The optional SA1250 power amplifier precisely matches the power needs of the SA28, provides optimal damping of the woofer and has factory optimized, multi-band limiting. The built-in amp eliminates the need for additional rack space and speaker cable runs, making adding a subwoofer to existing installs as simple as plugging it into power and running a signal to it.

Controlled via RHAON II, the SA1250’s built-in DSP has eight, fully parametric EQ filters, high and low shelf and high and low pass filters and up to 340 ms. of delay. All easily accessed via a Windows computer running RHAON II.

The SA28-RD adds Dante digital signal distribution capability including AES67 compatibility and network redundancy.

Technical Data

• Frequency Response:        
  • 50 Hz to 120 Hz (-3 dB)
  • 44 Hz to 170 Hz (-10 dB)
• Sensitivity:    
  • SX28    96 dB (1 W @ 1 m)
  • SA28-RN / SA28-RD    1.4 volts for rated output, analog
• Maximum Peak SPL:        126 dB (Half-space)
• Connections:  
  • SX28    2 x Neutrik Speakon NL4 in parallel with terminal strip
  • SA28-RN / SA28-RD    See SA1250 amplifier specifications
• Transducers:        Woofer: SSL8-23 x 2
• Crossover Frequency:    
  • SX28    120 Hz or lower recommended
  • SA28-RN / SA28-RD    100 Hz. Active
• Enclosure:        3/4 in./19 mm Birch plywood
• Grille:        16 GA powder coated, plated steel
• Finish:        Black (RAL9011) or White (RAL9010) paint, standard. Custom colors optional.
• Mounting:       16 x M10 UMH points; M20 pole mount.
• Weight:        54.2 lbs / 24.6 kg
• Dimensions:      
  •  20-1/2 in. / 521 mm wide
  • 10-1/2 in. / 267 mm high
  • 20 in. / 508 mm deep

SA1250 Amplifier Specifications

• Audio Connections:    
  • SA28-RN    2 x XLR-3, In & Loop-out, Analog and AES
  • SA28-RD    2 x XLR-3, In & Loop-out, Analog and AES, 2 x RJ45 Dante Primary & Secondary Ethernet
• Network Connections:    
  • SA28-RN    2 x RJ45, Looping Ethernet/RHAON
  • SA28-RD    2 x RJ45 Dante Primary & Secondary Ethernet/RHAON (Note: Dante and RHAON share a single or redundant Ethernet network.)
• Maximum Input Level:    
  • SA28-RN / SA28-RD    +22 dBu, Analog; 0 dBFS digital
• User DSP:    
• SA28-RN / SA28-RD    Eight fully parametric filters, high and low shelf, high and low pass filters, delay to 340 ms.
• Software:    
  • SA28-RN    RHAON II
  • SA28-RD    RHAON II and Dante Controller
• Latency:    
  • SA28-RN    6.25 ms
  • SA28-RD    6.25 ms + Dante transport latency
• Power Output:    
• SA28-RN / SA28-RD    LF= 1000 watts, @ 8 ohms. Multi-band peak and thermal limiting on all channels protects the drivers.
• Mains Voltage:   
• SA28-RN / SA28-RD    100-240 volts, 50/60 Hz auto-switching
• Power Consumption:    
• SA28-RN / SA28-RD    Idle: 300 mW. 1/8 power: 240 W (onset of limiting) 1/3 power: 550 W (hard limiting)
• Power Connector:    
• SA28-RN / SA28-RD    Neutrik powerCON TRUE-1
• Temperature Limits:    
• SA28-RN / SA28-RD    Max.: 140º F/60º C, with no direct sun exposure; Min.: -22º F/-30º C; leave unit on to keep interior warm below 32º F/0º C.