Sundown Audio SLD-10

The Sundown Audio SLD series, which includes the  SLD-10 10" (25cm) flat subwoofer,  can be considered a "reboot" of the SD-2 line from 2011. The SD-2 was essentially a "shallow SA v1" - that is, it had the same diaphragm, surround and spider as the SA, but a shorter motor with a shorter coil. The SD series went a different way from the 3rd generation (SD-3) onwards - more towards SQ and sealed enclosures (this also applies to the SD-4 series). Due to popular demand, we have launched the SLD series to bring back a highly abuse-tolerant "shallow" series that is happy to work with open enclosures!

Similar to the current SD-4 series, we have used solid pole pieces so that the SLD can also be mounted directly to the rear cabinet wall to reduce the required mesh depth. Compared to the old SD-2, we have introduced numerous important upgrades: pole piece channels for reduced air noise and improved cooling, top plate "slots" for better cooling and less distortion, and a magnet ID shorting ring. With long-term reliability in mind, we have also bolted the ring gear, bolted the motor together, screwed on the aluminum pole cap, and added "mini-XL" lead wires to ensure flawless operation for many years to come.

• Xmax = 12 mm in one direction at 70% BL
• Xmech is a hard limit of 25mm in one direction (more than double Xmax is a very generous limit)
• RMS power = 600 watts
• 2.5" voice coil former made of black aluminum for excellent heat dissipation
• high-temperature 4-layer copper voice coil wire
• Sewn-on "Mini-XL" lamella cables to prevent fatigue and failure
• Solid poles with high-speed ventilation channels milled around the OD
• Ventilated, EMD-cut top plate design
• Bolted motor construction for maximum durability and resistance to mechanical failures
• **This motor is bolted from the top so the bolts are not visible from the back like some other models.
• Magnet ID short-circuit ring

• T/S SPECS SLD 10″ D2 S
• RE (Ohm) 3.65
• FS (Hz) 44.907
• VAS (L) 14,630
• Qes 0.452
• Qms 2,212
• Qts 0.376
• Le (mH) -
• BL (NA) 18,247
• Mms (grams) 146.252
• Cms (uM/N) 85.883
• Sensitivity (dB @ 1w/1m) 86.5
• T/S SPECS SLD 10″ D4
• RE (Ohm) 6.85
• FS (Hz) 46.817
• VAS (L) 12.091
• Qes 0.547
• Qms 2,246
• Qts 0.440
• Le (mH) -
• BL (NA) 24,492
• Mms (grams) 162,818
• Cms (uM/N) 70,979
• Sensitivity (dB @ 1w/1m) 85.4
• Sealed housing14 liters
• bass reflex enclosure  28 liters
• Recommended tuning 35Hz
• Recommended  port area 100cm²
• depth  12.4cm
• outer diameter  26.6cm
• cutout 23.5cm