About: CT Sounds HYDRO-10 10" 500W RMS Shallow Mount Subwoofer

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 10” shallow-mount subwoofer with a mounting depth below 4” 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.

Our 1st prototype utilized a 61.1 mm voice coil & 50 oz magnet resulting in a high QES rating of 0.915 and low EBP of 39.46. The 2nd prototype utilized a 50.8 mm voice coil & 50 oz magnet resulting in a slightly lower QES rating of 0.736 and a slightly higher EBP of 49.27. 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”.

The 3rd and final prototype uses a 61.1 mm voice coil & 70 oz magnet resulting in a reduced QES rating of 0.504 and a balanced EBP of 76.29. 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 10” shallow-mount subwoofer that is extremely responsive in both sealed & ported enclosures.

Product Highlights:  

• RMS Power: 500 Watts

• MAX Power: 1000 Watts
• Voice Coil Configuration: Dual 2 Ohm (D2) or Dual 4 Ohm (D4)
• Use Cases: Sealed & Ported Enclosures

Specifications:  

• Product Type: Car Subwoofer
• Subwoofer Size: 10"
• Voice Coil Configuration: Dual 2 Ohm (D2) or Dual 4 Ohm (D4)
• 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

Thiele/Small Parameters: 

• Qes: 0.504 (D2) | 0.569 (D4) 

• Qms: 5.837  (D2) | 5.762 (D4) 
• Qts: 0.465 (D2) | 0.518 (D4) 
• Fs: 38.45 Hz (D2) | 39.37 Hz (D4) 
• Vas: 19.878 L (D2) | 20.596 L (D4) 
• Mms: 152.787 g (D2) | 140.610 g (D4) 
• Cms: 0.112 m/N (D2) | 0.116 m/N (D4)
• Re: 3.9 Ω (D2) | 6.6 Ω (D4) 
• Bl: 16.889 Tm (D2) | 20.089 Tm (D4) 
• Le:/
• Sd: 356 cm² 
• Xmax - Single Way (mm): 10 mm
• Xmax - Single Way (cm): 1 cm
• Vd (Sd*Xmax): 356 cm²
• SPL: 85.52 dB (D2) | 85.47 db (D4) 

Subwoofer Measurements:

• Cutout Diameter: 9.3"
• Overall Diameter: 10.86"
• Mounting Depth: 3.89"

Box Specifications:

• Displacement: 0.04 ft3

Box Recommendations:

• Sealed: 0.5 ft3
• Ported: 1 ft3
• Tuning Frequency: 34 Hz
• Port Area: 16 in2

*Enclosure recommendations do not account for subwoofer, bracing, and port displacement.