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Aurum Cantus AC300/75C2C 12" Woofer

Brand:| Model: AC500/75C2C
The Aurum Cantus AC300/75C2C 12" woofer features a 3" diameter voice coil, which combined with extensive thermal management techniques provides outstanding power handling and realistic impact.
  • Non-woven carbon fiber sandwich cone
  • Large 3" diameter copper-clad aluminum flat wire voice coil maximizes dynamic range
  • Round cast aluminum alloy frame is strong; easy to flush mount
  • Powerful magnet structure features distortion-canceling fixtures
  • Long-throw design and good Xmax for strong bass
  • Vented pole piece and under-spider openings reduce power compression
Part # 
Weight: 18.15 lbs.  
List Price$362.99
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Buy 4-up$235.76
Part # 296-458
Qty:  EA
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Product Details

Aurum Cantus AC300/75C2C 12" Woofer

The Aurum Cantus AC300/75C2C 12" woofer features a 3" diameter voice coil, which combined with extensive thermal management techniques provides outstanding power handling and realistic impact. The tailored response of the speaker's exotic yet supremely engineered non-woven carbon fiber sandwich cone delivers the signature Aurum Cantus combination of depth, accuracy, and listenability. A copper-plated flat aluminum wire voice coil provides high efficiency and excellent power handling, complemented by a low-distortion magnet system and precisely cast aluminum alloy basket. Aurum Cantus woofers are characterized by fast transient response, minimal tonal coloration, and deep, dynamic bass.

Product Specifications
  • Nominal Diameter12"
  • Power Handling (RMS)250 Watts
  • Power Handling (max)375 Watts
  • Impedance8 ohms
  • Frequency Response22 to 2,800 Hz
  • Sensitivity91 dB 1W/1m
  • Voice Coil Diameter3"
Thiele-Small Parameters
  • Resonant Frequency (Fs)22 Hz
  • DC Resistance (Re)7 ohms
  • Voice Coil Inductance (Le)1.31 mH
  • Mechanical Q (Qms)2.16
  • Electromagnetic Q (Qes)0.42
  • Total Q (Qts)0.35
  • Compliance Equivalent Volume (Vas)8.19 ft.³
  • Mechanical Compliance of Suspension (Cms)0.65 mm/N
  • BL Product (BL)13.2 Tm
  • Diaphragm Mass Inc. Airload (Mms)84g
  • Maximum Linear Excursion (Xmax)8.5 mm
  • Surface Area of Cone (Sd)500 cm²
Materials of Construction
  • Cone MaterialCarbon Fiber
  • Voice Coil Wire MaterialCCA
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter12.99"
  • Baffle Cutout Diameter11.1"
  • Depth5.59"
  • # Mounting Holes6
Optimum Cabinet Size *
  • Sealed Volume1.87 ft.³
  • Sealed F350 Hz
  • Vented Volume4.21 ft.³
  • Vented F329 Hz
  • * Enclosure volume/F3s based on BassBox "optimum" calculations-
Aurum Cantus AC300/75C2C 12" Woofer
  • BrandAurum Cantus
  • ModelAC500/75C2C
  • Part Number296-458
  • UPC844632089206
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Weight18.15 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Aurum Cantus AC300/75C2C 12" Woofer

Product Q&A

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Aurum Cantus AC300/75C2C 12" Woofer

Can this be considered a high end product?

Asked by: mrspis
Yes, Aurum Cantus drivers are generally very high quality, although some Scan-Speak, Seas, or Usher drivers may produce even better results. But, at this level of quality and price there isn't a huge difference between any particular driver, and differences are fairly subjective.
Answered by: eboyer
Date published: 2014-03-20

The diameter on the speaker cab. is 11in. Would that be a 12 in woofer?

Asked by: jojo
The cutout in the cabinet can be an indicator of the nominal size of the speaker which will fit, but not always. As listed on our website, "A" is the overall diameter of the speaker including the frame or faceplate, "B" is the inside diameter of the required cutout, and "C" is the mounting depth. This particular speaker requires an 11-1/4" cutout, so it would not fit in your 11" cutout without modification to the cabinet. This speaker is also 13" overall, but is listed under 12" woofers simply for classification purposes.
Answered by: RussR
Date published: 2013-05-08

What size box

What is the optimum size box and vented or sealed for best hi fi sound?
Asked by: stillhappy1
This is a very exceptional driver. Venting and porting both have their benefits. The best thing to do is use some box software or a box calculator that you can search online and fill in the specs of the woofer. You can see the box size, dimensions and port length and diameter if a ported box. Audiophiles consider sealed better than ported. High efficiency and sound reinforcement typically go ported. If you are using a dipolar mid/high, a ported bass can have a better blend with the openness of that range. For sealed - design with a total Qts of .707 for flattest response. When you use the box calculator - typically one set of specs makes sense and the other doesn't - so if the ported or sealed suggestion looks whacky - it's telling you that the driver designed is optimized to be used as ported or sealed. Not all drivers can be used both ways.
Answered by: MarkAJH
Date published: 2014-03-20

Would the ARUM CANTUS AC 300/75C2C "12" be good replacement

I have the martin Logan Monolith II and the woofers are gone. Would the Arum Cantus AC 300/75C2C "12" BE AGGOD REPLACEMT WOOFERS? AND ARE THERE A BETTER UPGRADE FROM THE ORIGINAL ML woofer?
Asked by: benz
im not familiar with that martin logan model,but these are top notch acoustic suspension woofers for 2-2.75cu.ft. with f3 in mid 40's
Answered by: unk1
Date published: 2014-03-20

The Woofer has 6 mounting holes and the enclosure of the speaker cabinet has 8.

Would this present a problem when it comes to mounting the enclosure in the speaker in the cabinet?
Asked by: benz
It is not uncommon to have to drill new screw holes when replacing a woofer. I would recommend drilling 6 brand new holes and sealing up the old ones.
Answered by: MattP
Date published: 2013-05-08

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