MarkAudio MAOP-5 FullRange PAIR (3″/4ohm)

 

Overview:

50mm Fullrange drive unit. Single ferrite magnet.

4ohm Nominal impedance

Low-profile, micro-arc oxodsied multiform cone for broad directivity pattern

All MAOP drive units are custom measured in our anechoic chamber: data here published as a sample for general guidance.

 

Product Description:

The Magnetic Arc Oxidisation Process is done at extremely high temperature in a flux bath that is prone to differential temperatures (hot/cold spots) which can warp the cones. The process is 10 times the cost of normal cone production, at least half are scrapped as it does render cones unusable if they are warped even slightly. The MAOP process involves a chemical conversion where the cone material is converted into its crystalline oxide. The crystal grows both inward into the substrate and outward. As such the new coating is not a deposited coating it is part of the original structure which gives excellent adhesion. The large crystal structure provides excellent stiffness and resistance to damage. The crystalline structure also encapsulates microscopic voids. It is supposed that it is the blend of microscopic voids and stiff structure that lend the cone the audio properties of both the metal cone and the paper cone, accuracy and a listen all day quality.

After construction, each driver is individually measured in the anechoic chamber at the Markaudio factory and pair matched based on that data to within, 0.5% tolerance.  Each pair is supplied with individual electrical and acoustic measurements.

 

Mark Audio MAOP-5 Magnetic Arc Oxidized Full Range Matched Pair – 101mm- 4 ohm

 

Diameter 101mm
Cutout 78mm
Depth 41mm
Flange thickness 7.5mm

 

 Specifications:

 

Possible Box Alignments
Sealed box of 0.07 cubic feet (2 liters)
3dB down of 165Hz, 6dB down of 120Hz, 9dB down of 97Hz

Vented box of 0.07 cubic feet (2 liters)
1″ diameter vent by 1.5″ long
3dB down of 99Hz, 6dB down of 88Hz

You could build the 2 liter vented box and stuff the port to be able to listen to the speaker either sealed or vented.

[8cm metal cone full range] Impedance: 4Ω
Output sound pressure level: 87dB
Playback frequency band: 95Hz-30kHz
Rated input: 5W
Minimum resonance frequency Fo: 110Hz
Vas: 1.6Ltr
Qms: 1.6
Qes: 0.6
Qts: 0.4
Mms: 1.4g
Xmax: 3mm
Baffle opening diameter: Φ79mm

 

Box-Plans