Details CT Sounds is proud to introduce the hydro shallow mount subwoofer series after completing a rigorous R&D process spanning 2 years! Our goal was to engineer a 500-watt 12” shallow-mount subwoofer with a mounting depth below 4.5” that was suitable for both sealed & ported enclosures. To achieve this, we focused on the EBP (Efficiency Bandwidth Product). As a general rule, EBP < 50, is used only for sealed enclosures, EBP 50 - 100, is used for both, and EBP > 100, is used only for ported enclosures. EBP = FS/QES. Quick Facts: RMS Power: 500 Watts MAX Power: 1000 Watts Voice Coil Configuration: Dual 2 Ohm Use Cases: Sealed & Ported Enclosures Our 1st prototype utilized a 61.1 mm voice coil & 75 oz magnet resulting in a high QES rating of 0.89 and low EBP of 37.87. The 2nd prototype utilized a 50.8 mm voice coil & 75 oz magnet resulting in a slightly lower QES rating of 0.716 and a slightly higher EBP of 47.07. After the 1st and 2nd prototypes, we determined a larger motor assembly was needed to provide a more controlled electrical system (lower QES). This led us to invest in a custom-tooled basket (used in the final prototype) to keep the mounting depth below 4.5”. The 3rd and final prototype uses a 61.1 mm voice coil & 92 oz magnet resulting in a reduced QES rating of 0.490 and a balanced EBP of 70.73. In testing, we ran into mechanical noise due to the larger motor assembly and voice coil in a confined space. Therefore, we invested in a custom-tooled cone to maximize the excursion capability by creating an equal distance between the cone, spider, and bottom plate. The result is a 12” shallow-mount subwoofer that is extremely responsive in both sealed & ported enclosures. Specs General Specifications: Product Type: Car Subwoofer Subwoofer Size: 12" Voice Coil Configuration: Dual 2 Ohm RMS Power: 500 Watts MAX Power: 1000 Watts Voice Coil Type: 2.40 Inch - 4 Layer High-Temperature Copper Voice Coil Magnet Type: Y35 Bottom Plate Type: Low Carbon Iron Surround Type: Dual White Stitched Competition Mega Foam Surround Cone Type: Composite Paper with 3% Carbon Fiber Reinforcement Tinsel Lead Type: Single Braided Flat Copper Tinsel Leads Terminal Type: 12 Gauge Push Terminals Basket Type: Stamped Steel Spider Material: Poly-Cotton Blend T/S Parameters: Qes: 0.490 Qms: 5.850 Qts: 0.453 Fs: 34.66 Hz Vas: 38.150 L Mms: 204.701 g Cms: 0.103 m/N Re: 3.9 Ω Bl: 18.820 Tm Le: / Sd: 510.7 cm² Xmax - Single Way (mm): 11 mm Xmax - Single Way (cm): 1.1 cm Vd (Sd*Xmax): 561.77 cm² SPL: 87.14 dB Box Specs Subwoofer Measurements: Cutout diameter 11.10" Overall diameter 12.79" Mounting depth 4.52" Box Specifications: Displacement 0.065 ft3 Box Recommendations: Sealed 0.75 ft3 Ported 1.5 ft3 Tuning Frequency 32 Hz Port Area 24 in2 *Enclosure recommendations do not account for subwoofer, bracing, and port displacement. Details CT Sounds is proud to introduce the hydro shallow mount subwoofer series after completing a rigorous R&D process spanning 2 years! Our goal was to engineer a 500-watt 12” shallow-mount subwoofer with a mounting depth below 4.5” that was suitable for both sealed & ported enclosures. To achieve this, we focused on the EBP (Efficiency Bandwidth Product). As a general rule, EBP < 50, is used only for sealed enclosures, EBP 50 - 100, is used for both, and EBP > 100, is used only for ported enclosures. EBP = FS/QES. Quick Facts: RMS Power: 500 Watts MAX Power: 1000 Watts Coil Configuration: Dual 4 Ohm Use Cases: Sealed & Ported Enclosures Our 1st prototype utilized a 61.1 mm voice coil & 75 oz magnet resulting in a high QES rating of 0.955 and low EBP of 37.07. The 2nd prototype utilized a 50.8 mm voice coil & 75 oz magnet resulting in a slightly lower QES rating of 0.769 and a slightly higher EBP of 46.23. After the 1st and 2nd prototypes, we determined a larger motor assembly was needed to provide a more controlled electrical system (lower QES). This led us to invest in a custom-tooled basket (used in the final prototype) to keep the mounting depth below 4.5”. The 3rd and final prototype uses a 61.1 mm voice coil & 92 oz magnet resulting in a reduced QES rating of 0.526 and a balanced EBP of 70.04. In testing, we ran into mechanical noise due to the larger motor assembly and voice coil in a confined space. Therefore, we invested in a custom-tooled cone to maximize the excursion capability by creating an equal distance between the cone, spider, and bottom plate. The result is a 12” shallow-mount subwoofer that is extremely responsive in both sealed & ported enclosures. Specs General Specifications: Product Type: Car Subwoofer Subwoofer Size: 12" Voice Coil Configuration: Dual 4 Ohm RMS Power: 500 Watts MAX Power: 1000 Watts Voice Coil Type: 2.40 Inch - 4 Layer High-Temperature Copper Voice Coil Magnet Type: Y35 Bottom Plate Type: Low Carbon Iron Surround Type: Dual White Stitched Competition Mega Foam Surround Cone Type: Composite Paper with 3% Carbon Fiber Reinforcement Tinsel Lead Type: Single Braided Flat Copper Tinsel Leads Terminal Type: 12 Gauge Push Terminals Basket Type: Stamped Steel Spider Material: Poly-Cotton Blend T/S Parameters: Qes: 0.526 Qms: 5.444 Qts: 0.480 Fs: 36.84 Hz Vas: 36.150 L Mms: 191.187 g Cms: 0.097 m/N Re: 6.4 Ω Bl: 22.215 Tm Le: / Sd: 510.7 cm² Xmax - Single Way (mm): 11 mm Xmax - Single Way (cm): 1.1 cm Vd (Sd*Xmax): 561.77 cm² SPL: 87.40 dB Box Specs Subwoofer Measurements: Cutout diameter 11.10" Overall diameter 12.79" Mounting depth 4.52" Box Specifications: Displacement 0.065 ft3 Box Recommendations: Sealed 0.75 ft3 Ported 1.5 ft3 Tuning Frequency 32 Hz Port Area 24 in2 *Enclosure recommendations do not account for subwoofer, bracing, and port displacement. Wiring Calc. #calc#
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