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Four Channel Networked Amplifier

Model: Voltera D 4800.4M

  • Streamline system design with integrated processing — onboard DSP offers TesiraFORTÉ-equivalent signal processing for routing, EQ, filtering, delay, and loudspeaker optimization without external hardware.
  • Power demanding loudspeaker systems — 4800W total output across four Class D channels delivers exceptional headroom for performance spaces, auditoriums, and high-output distributed systems.
  • Support flexible loudspeaker configurations — drives low-impedance (2.7,4,8,16 ohm) and constant-voltage (70V/100V) loads, enabling installers to mix system topologies as needed.
  • Integrate seamlessly into networked audio systems — full support for AVB, Dante, and AES67 ensures compatibility across a wide range of enterprise and large-venue AV infrastructures.
  • Accelerate commissioning and tuning — ALAMOS loudspeaker profile library includes nearly 700 optimized presets for fast deployment and consistent system performance.
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The Voltera D 4800.4M is a high-performance, DSP-enabled four-channel amplifier engineered for installations requiring substantial output power, advanced processing, and enterprise-grade reliability. Delivering 4800 watts of total power in a compact 1RU chassis, it is designed for demanding applications including performing arts centers, stadiums, houses of worship, large conference venues, and multi-zone commercial facilities.

What sets the “M” model apart is its integrated TesiraFORTÉ-class DSP engine, offering a full suite of routing, loudspeaker management, equalization, filtering, delay, and protection features directly within the amplifier. This allows system designers to reduce hardware count, streamline rack space, and simplify commissioning workflows.

Network flexibility is built into the core: AVB, Dante, and AES67 support allow the Voltera D 4800.4M to fit seamlessly into diverse audio networking architectures. Nearly 700 ALAMOS loudspeaker profiles enable rapid deployment with consistent, optimized results across a wide range of loudspeaker models.

Designed for demanding loudspeaker applications, the amplifier’s high peak-voltage output ensures efficient energy delivery even when driving systems that require elevated voltages, maintaining clean, low-distortion performance at all output levels.

Advanced limiters ensure stable performance even under challenging program peaks, while amplifier’s processor can be sustained through PoE+ during power failures, avoiding reboots.

A powerful combination of wattage, intelligent DSP, and robust interoperability, the Voltera D 4800.4M provides integrators with a highly flexible, dependable platform for large-scale and performance-oriented systems.

  • Streamline system design with integrated processing — onboard DSP offers TesiraFORTÉ-equivalent signal processing for routing, EQ, filtering, delay, and loudspeaker optimization without external hardware.
  • Power demanding loudspeaker systems — 4800W total output across four Class D channels delivers exceptional headroom for performance spaces, auditoriums, and high-output distributed systems.
  • Support flexible loudspeaker configurations — drives low-impedance (2.7,4,8,16 ohm) and constant-voltage (70V/100V) loads, enabling installers to mix system topologies as needed.
  • Integrate seamlessly into networked audio systems — full support for AVB, Dante, and AES67 ensures compatibility across a wide range of enterprise and large-venue AV infrastructures.
  • Accelerate commissioning and tuning — ALAMOS loudspeaker profile library includes nearly 700 optimized presets for fast deployment and consistent system performance.
  • Handle peak-demand moments effortlessly — power sharing delivers up to 75% of total power through any single channel.
 
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Douglas Fearing- Co-Founder / President

A graduate of DeVry Institute of Technology, Doug has been in the Technology industry since 1976 and actively oversees Fearing’s daily operations. Along with his wife, Lois, and three others, Doug started Fearing’s in a 600 square-foot facility in Portage, Wisconsin. In the 25 years since, the company has grown to over 30 employees with offices in Madison and Milwaukee, Wisconsin. Doug likes to say he’s a “TV Technician with a dream� going back to his history with the family’s original business-Fearing’s TV and Appliance.

Doug values time with family, watersports, hiking, snowshoeing and skiing. In addition to being a devoted member of his church, Doug serves as Board President for Kinship Mentoring of Columbia County, Board member of Schools for Haiti and Scripture Chair of the Gideons-Portage camp.

Lois Fearing- Co-Founder/Accounting, Human Resources

A graduate of MATC, Lois oversees Fearing’s daily book keeping along with various HR responsibilities.

Along with Doug, Lois is deeply connected to community outreach, serving as a Board member and Fundraising Committee Chairperson for Kinship Mentoring of Columbia County. She also serves on the Schools for Haiti Fundraising committee. In addition, Lois’ ongoing passion and commitment to provide care for the elderly comes from her 10-year history of working in a Reedsburg, Wisconsin Nursing home.

Lois enjoys singing, hiking, sunny days on the pontoon, and spending time with her 4 grandchildren.

Ehren Tresner-VP of Technology and Innovation

Ehren drives Fearing’s technology by continually seeking out trends to enhance capabilities while supporting Sales, Engineering and Installation teams. Throughout his years with Fearing’s, Ehren’s talent and vision have joined forces to create a wide variety of projects and strategic solutions that exceed expectation.

Ehren loves music, family time, movies, nature, sustainability efforts and electric vehicles.

Ben Voeck-Director of Commercial AV

With 10 years with Fearing’s and over twice that long in the industry, Ben continues to lead, coordinate, and develop the Commercial AV team.

By consistently delivering an outstanding experience and outcome, Ben contributes to the Fearing’s legacy of long-lasting partnerships that truly make a difference. Whatever the Commercial AV need may be, Ben and team deliver at the highest level.

Ben is an avid fisherman and photographer. He enjoys coaching his sons and other youth.

Chris Matson-Senior VP of Sales

Chris has been with Fearing’s for 20 years and in the industry for over 2 decades. As a Certified leader in Sales Acceleration and trained in EOS (Entrepreneurial Operating Systems), Chris successfully utilizes his skills to lead the Fearing’s Salesforce. Chris and team are motivated and driven to develop new client partnerships while continuing to reinforce loyal long-term relationships with ongoing Service excellence.

Married for 19 years with 3 children, Chris enjoys skiing, hiking, fishing, boating, hunting, camping and golf. He’s also been actively involved as a Youth Football and Softball coach for his family and others.