Simple 12" Infinity Kappa VQ MidQ Plans

DemiSlayer · Oct 12, 2018

So i cant find an infinity replacement and i dont want to fork out 1k for w7 subs.

what about RE subs or Digital designs?

Will the Dayton Audio RSS315HO-4 12" Reference HO Subwoofer 4 Ohm work fine with this box ?

Product Specifications
Nominal Diameter12"Power Handling (RMS)700 Watts
Power Handling (max)1400 WattsImpedance4 ohms
Frequency Response26 to 600 HzSensitivity90.5 dB 2.83V/1m
Voice Coil Diameter2.5"Magnet Weight150 oz.
Thiele-Small Parameters
Resonant Frequency (Fs)26.2 HzDC Resistance (Re)3.2 ohms
Voice Coil Inductance (Le)1.75 mHMechanical Q (Qms)3.63
Electromagnetic Q (Qes)0.33Total Q (Qts)0.31
Compliance Equivalent Volume (Vas)1.89 ft.³Mechanical Compliance of Suspension (Cms)0.15 mm/N
BL Product (BL)20 TmDiaphragm Mass Inc. Airload (Mms)280.9g
Maximum Linear Excursion (Xmax)12.3 mmSurface Area of Cone (Sd)514.7 cm²
Materials of Construction
Cone MaterialAluminumSurround MaterialRubber
Voice Coil Wire MaterialCopperVoice Coil FormerAluminum
Basket / Frame MaterialCast AluminumMagnet MaterialFerrite
Mounting Information
Overall Outside Diameter12.36"Baffle Cutout Diameter11.1"
Depth5.75"# Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
Sealed Volume0.33 ft.³Sealed F366 Hz
Vented Volume0.98 ft.³Vented F336 Hz

TLS Guy · Oct 12, 2018

DemiSlayer said:
So i cant find an infinity replacement and i dont want to fork out 1k for w7 subs.

what about RE subs or Digital designs?

Will the Dayton Audio RSS315HO-4 12" Reference HO Subwoofer 4 Ohm work fine with this box ?

Product Specifications
Nominal Diameter12"Power Handling (RMS)700 Watts
Power Handling (max)1400 WattsImpedance4 ohms
Frequency Response26 to 600 HzSensitivity90.5 dB 2.83V/1m
Voice Coil Diameter2.5"Magnet Weight150 oz.
Thiele-Small Parameters
Resonant Frequency (Fs)26.2 HzDC Resistance (Re)3.2 ohms
Voice Coil Inductance (Le)1.75 mHMechanical Q (Qms)3.63
Electromagnetic Q (Qes)0.33Total Q (Qts)0.31
Compliance Equivalent Volume (Vas)1.89 ft.³Mechanical Compliance of Suspension (Cms)0.15 mm/N
BL Product (BL)20 TmDiaphragm Mass Inc. Airload (Mms)280.9g
Maximum Linear Excursion (Xmax)12.3 mmSurface Area of Cone (Sd)514.7 cm²
Materials of Construction
Cone MaterialAluminumSurround MaterialRubber
Voice Coil Wire MaterialCopperVoice Coil FormerAluminum
Basket / Frame MaterialCast AluminumMagnet MaterialFerrite
Mounting Information
Overall Outside Diameter12.36"Baffle Cutout Diameter11.1"
Depth5.75"# Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
Sealed Volume0.33 ft.³Sealed F366 Hz
Vented Volume0.98 ft.³Vented F336 Hz

Unfortunately those Infinity kappa drivers were very poorly made, and just about all have failed.

You can not install different drivers. Every driver has unique T/S parameters and small changes make the design not work.

So picking a new driver means a new design and build.

ErikS · Jul 1, 2022

TLS Guy said:
Unfortunately those Infinity kappa drivers were very poorly made, and just about all have failed.

You can not install different drivers. Every driver has unique T/S parameters and small changes make the design not work.

So picking a new driver means a new design and build.

So to resurrect an old thread, I have this sub box (bought it from the Nebraska guy above, the picture of it is there) with an infinity kappa perfect 12.1. Non-dq version.

I have upgrade-itis and realized the driver is going on 12 years old. Still works, though.

Recently I discovered multiple subwoofer databases in which you input the Fs and other thiel-small (or something) parameters and it tells you what drivers are similar.

So according to these sites, the closest match to the perfect 12.1 is this bad boy: