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DM58 Preamplified Digital Microphone

Product overview

The L3Harris DM58 is a preamplified digital microphone that provides an ED-112A-compliant integrated Cockpit Area Microphone (CAM) and preamplifier functionality for commercial and military aircraft. The microphone output may be either analog for current generation Cockpit Voice Recorders (CVRs) or digital for next generation recorders. The inclusion of an ED-112A compliant preamplifier benefits customers by reducing system part count, size and weight.

  • Integrated CAM and preamplifier for CVR
  • ED-112A CAM and ED-112 Preamplifier are compliant with latest ED-112A specifications
  • User-selectable attenuation
  • Compact size, and simplified installation and wiring

Key Features

Compliant with ED-112A specifications

Both the L3Harris DM58’s Cockpit Area Microphone (CAM) and preamplifier are ED-112A compliant, providing versatility when used with either current CVRs or digital next-generation voice recorders. The ED-112A CAM includes Micro-Electro-Mechanical Systems (MEMS) technology, improved vibration immunity for helicopter and turboprop installations, and improved cell phone/GSM signal immunity. The ED-112 Preamplifier features both analog and digital output options and features Digital Signal Processing for precise performance.


Versatile mounting options and formats

The DM58’s mounting capability is compatible with legacy CAM models. Additionally, the ED-112 Preamplifier features both analog and digital output options and Digital Signal Processing for precise performance. The integrated microphone and preamplifier also supports modern glass cockpits where a traditional CVR control unit/preamplifier is not desired. TSO approval simplifies certification for aircraft manufacturers, installers and end users.

Product specifications

PHYSICAL Height: 0.9 in. (2.3 cm)
Width: 1.1 in. (2.8 cm)
Depth: 3.5 in. (8.9 cm)
Weight: < 0.3 lb. (0.14 kg)
POWER Requirements: CVR powered or 28 VDC (option)
Consumption: < 1 W
COMPATIBILITY FA2100, FA2200, FA2300, FA5000, SRVIVR and APR2500
INTERFACE Aircraft/Recorder Interface: Four-wire shielded cable pigtail
Compatibility: Compatible with legacy three-wire installations
CONTROLS Attenuation, 0 and 12 dB (accessible during installation only)
INDICATORS Microphone Peak / Overload (accessible during installation only, not visible to pilots in installed orientation)
ENVIRONMENTAL Temperature: -15 C to +70 C
Altitude: 15,000 ft.
Humidity: 95% RH (non-condensing)
Comprehensive: DO-160G test categories upon request
COMPANY CERTIFICATION ISO 9001:2008 and AS9100:2009 Rev. C Certified


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Visit technical support website

To gain access to the latest technical publications, service bulletins and other pertinent information about your recorders or other L3Harris devices, operators and authorized repair facilities need to register with our technical support organization for the online library.

Technical support:
Email: [email protected]
Phone & AOG hotline: +1 (321) 674-4900

Technical publications:
Email: [email protected]

Cage Code / Federal Supply Code: 25583

Facility / Shipping / Mailing address:
5353 52nd Street, S.E.
Grand Rapids, MI 49512-9704 USA

Order administration / Sales / General inquiries:
Phone: +1 (616) 949-6600
Email: [email protected]

Repair and overhaul administration: 
Email: [email protected]
Phone: +1 (321) 674-4900
Fax: +1 (616) 977-6895
For service repair (Part 145) returned material authorizations (RMA): Visit RMA website

Data services:
Email: [email protected]