Aurum Cantus AC120/50CK 5" Midwoofer

Brand:| Model: AC120/50CK
The Aurum Cantus AC120/50CK 5" midwoofer is capable of performance far beyond what is usually expected from transducers of its size or class.
A restocked/refurbished, or Open Box unit of the product is available -- see it now
  • Non-woven carbon fiber/Kevlar composite cone
  • Large 2" 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 reduces power compression
Part # 
Weight: 5.25 lbs.  
List Price$126.99
You Save25%
Your Price
Buy 4-up$86.98
Part # 296-440
Qty:  EA
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Product Details

Aurum Cantus AC120/50CK 5" Midwoofer

The Aurum Cantus AC120/50CK 5" midwoofer is capable of performance far beyond what is usually expected from transducers of its size or class. The tailored response of the speaker's exotic yet supremely engineered cone selection delivers the signature Aurum Cantus combination of depth, accuracy, and listenability. A large diameter 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 Diameter5"
  • Power Handling (RMS)150 Watts
  • Power Handling (max)225 Watts
  • Impedance8 ohms
  • Frequency Response43 to 7,000 Hz
  • Sensitivity90 dB 1W/1m
  • Voice Coil Diameter2"
Thiele-Small Parameters
  • Resonant Frequency (Fs)43 Hz
  • DC Resistance (Re)7 ohms
  • Mechanical Q (Qms)3.4
  • Electromagnetic Q (Qes)0.19
  • Total Q (Qts)0.18
  • Compliance Equivalent Volume (Vas)0.42 ft.³
  • Mechanical Compliance of Suspension (Cms)1.21 mm/N
  • BL Product (BL)10.6 Tm
  • Diaphragm Mass Inc. Airload (Mms)11.5g
  • Maximum Linear Excursion (Xmax)6 mm
  • Surface Area of Cone (Sd)82 cm²
Materials of Construction
  • Cone MaterialCarbon Fiber / Kevlar
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter5.91"
  • Baffle Cutout Diameter4.88"
  • Depth3.19"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.02 ft.³
  • Sealed F3191 Hz
  • Vented Volume0.04 ft.³
  • Vented F3130 Hz
Aurum Cantus AC120/50CK 5" Midwoofer
  • BrandAurum Cantus
  • ModelAC120/50CK
  • Part Number296-440
  • UPC844632089121
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (2 Reviews)
  • Weight5.25 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 AC120/50CK 5" Midwoofer

Product Q&A

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Aurum Cantus AC120/50CK 5" Midwoofer


Thanks Mark I want to go with the 24db crossoverI just don't know what values to use for thecaps and inductors by values I mean uf and mhmy goal is to make a 3way with AC120/50CKAurum Cantus APR2.1 AC200/50C2C thanks
Asked by: gregory
What I do is a web search for speaker crossover calculators. It allows you to put in the exact impedance of each driver and the crossover point you want. It then displays the schematic for the build and all the part numbers. Great choice. The attack and response time of your tweeter will allow you to hear things you never have. It is almost startling And that mid-woof should transition almost seamlessly. Have fun
Answered by: MarkAJH
Date published: 2013-11-19

Crossover for this driver

I want to use this along with Aurum Cantus AC200/50C2Cand Aurum Cantus APR1.2 just need help with the crossoverwith these drivers. thank you
Asked by: gregory
You have a few options. First - both of these drivers are of audiophile grade - so you don't want to cheap out on the crossover. One: Stay in phase. If you want to do a simple 6db/octave crossover - plan on 4500hz for safety. There is enough headroom on both the woofer and tweeter to have a smooth transition at that frequency. You'll need an "L" pad for the tweeter or calculate resistors to reduce -3db to match the woofer. Use high voltage polypropelene caps on the tweeter and air coils of large gauge for the woofer (18ga is fine). Personally, I'd go with an L pad rated at 100 watts over the resistors for more headroom and the ability to tweak the sound in various environments from reflective to absorbtive. If you really want to go crazy-good - build a 24db/octave crossover and at 2500 hz. You'll get a more open sound by using more range on the tweeter. But the crossover is more complicated with more parts and can be pricey. Have fun!
Answered by: MarkAJH
Date published: 2013-11-19

how many cubes for 2 ported, with a tuning 50 hz?

Asked by: arntsmag
There are many variations and response curves available for these drivers. They work well in both sealed and ported enclosures. A 5" at 50 hz is good for a near-field or computer monitor - but not a large home theater setup - it would be better as a midrange... A box calculator will help you select your F3, determine the net box volume and the length and diameter of the port
Answered by: MarkAJH
Date published: 2012-06-07

Which one?

Hi,I need a midwoofer for a 6 inch wide .15 cu. ft. cabinet.Do you think the AC 120/50CK would work or would 2 TB 1720s be better.The lows are crossed over at 120 and the highs at 3k .Thanks Bob
Asked by: BobTrz
The Aurum Cantus AC-130F1 5-1/4" Woofer is a very good match for your small cabinet. It is a cutting edge product. While the TB's are very good - they are no match to an Aurum Cantus.
Answered by: MarkAJH
Date published: 2013-08-07
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