The Sophono Alpha 2 MPO magnetic bone conduction hearing system brings abutment-free bone conduction to your patients with the smallest magnetic implant on the market. The implant lies completely under skin and has low risk of skin issues. After healing, the skin and hair look normal, with no titanium abutment protruding through the skin like other bone conduction systems. The implant consists of two magnets hermetically sealed in a titanium case. An Attract magnetic spacer (connected to the external processor) is held in position by the magnetic implant. The processor transmits audio vibrations through the skin into the bone where sound is sensed by the cochlea.

No other implant system - abutment or magnetic, offers the simplicity, low profile and stability of the SophonoTM device.

The Sophono Alpha 2 MPO Bone Conduction Hearing Device offers the Lowest Profile Processor

Take advantage of the performance available with up to 45 dB of feedback free gain!3
Compared to other transcutaneous devices that means up to 7 dB more of feedback free gain!  That's 60% louder than our competition!

The SophonoTM Alpha 2 MPO bone conduction hearing device provides improved performance with the highest functional gain, accompanied by outstanding sound quality. Your patients now experience our processor with 45 dB acoustic-mechanical gain, an increase of 16 dB. The figure below shows how the SophonoTM device output, measured in force (micronewtons), correlates to the input in decibels sound pressure level (SPL) for varying tones.  For audiologists concerned with the acousto-mechanical gain, you can see that along the 60 dB SPL curve there’s an acousto-mechanical gain up to 45 dB at 1,600 KHz. Compared to other bone conduction hearing systems, this proves to be a powerful gain in hearing for your patients. Sophono offers more sound amplification (gain) than any other magnetic transcutaneous system!

Compared with other transcutaneous hearing systems:

  • More than 4,000 patients have the SophonoTM implant, a safe alternative to more intrusive implants.7
  • SophonoTM has the lowest profile processor, a sleek solution that may be hidden under the hair.

The Alpha 2 MPO magnetic bone conduction hearing system features a titanium encased magnetic  implant, an external processor, and 12 Attract® magnetic spacers with variable strengths to ensure patient comfort and secure fit.

Proprietary TET Technology

Transcutaneous Energy Transfer (TET) technology enables maximum transfer from the SophonoTM sound processor, through the patient’s skin and magnetic bone implant, to the working cochlea. TET eliminates up to 20 dB of energy reflection on skin typically associated with percutaneous systems.8

MRI Compatible up to 3 Tesla

The Sophono is FDA cleared for MRI conditional up to 3 Tesla.9,10 In non-clinical testing, when positioned parallel to the patient table, the Alpha (M) Magnetic Implant maintained over 95% of its original magnetic strength after 10 insertions into the static magnetic field of a 3-Tesla MR system and a 10-minute imaging sequence in a 3 Tesla Siemens Tri Clinical MRI Scanner (MRC20587). The SophonoTM produces a 5 cm shadow,9 the smallest transcutaneous MRI shadow, and does not require implant removal. You can safely use an MRI only under the following conditions:

  • ƒRemove all external components including the Otomag Alpha Sound Processor, Magnetic Spacer, Headband or Softband before entering the MRI environment.
  • Static magnetic field of 3 Tesla or less
  • Spatial gradient field of 720 Gauss/cm or less
  • Maximum whole-body averaged specific absorption rate (SAR) of 4 W/kg in the First Level Controlled Mode for a maximum scan time of 15 minutes of continuous scanning (per pulse sequence).


Feature Details

Alpha 2 MPO processor


Either side, with ergonomic grip design

Headband Configuration


Softband Configuration




Digital Signal Processor


Data Logging





Two microphones in an isolated compartment with omni and directional modalities

Direct Audio Input

Standard Europlug

Retention Clip and Lanyard


Auto Noise Reduction


Auto Feedback Suppression


Frequency Range

125 - 8000 Hz


16-band, 8-channel WDRC

Power Supply

Type 13 zinc air battery

Peak Output Force Level11
at 90 dB SPL re 1µN

115 dB

Output Force Level11
at 60 dB SPL re 1µN

105 dB

Battery Life12

up to 320 hours

Audible Warning Tones



Anthracite, Brown, Champagne, Silver

Skinit® Decal

Gift card for one pair included.