Compact speaker has matching small price

Milennia S3501

Jan 11, 2024

Many small stereo speakers sound tinny and lack the sound pressure level (SPL) to overcome the various noises on a boat. But not the 3–1/2″ Milennia S3501 from RiverPark Marine, formerly ProSpec Electronics. The high-performance mid-range speaker fits into the tightest spaces, produces rich, high-end audio and has a price tag that matches its compact size.

The Milennia S3501 is IPX5-rated watertight. This makes it ideal as a primary speaker in smaller boats where splashing is common or as the wetter part of a more extensive audio system. Used singly, it’s also perfect as a dedicated VHF speaker.

Featuring 25W RMS, 75W peak power, the Milennia S3501 from RiverPark Marine has a frequency response of 55Hz–20kHz. With 4 ohms impedance, sensitivity is 89dB at 2.83V/1M. This delivers the big, full-range sound and tonal balance the Milennia brand is known for.

Because its graphite grille is only 4″ in diameter, the Milennia S3501 is easy to fit into spaces other speakers can’t. It requires a 3″ hole and a mere 1–1/2″ of depth. An integrated gasket makes installation a breeze. Ideal for refit and OEM use alike, the Milennia MIL-S3501 from RiverPark Marine costs $59.95 USD / pair.

Related Articles

Sylvan G3 CLZ DC: Luxury For Everyone

Sylvan’s brilliant G3 CLZ DC brings an entirely new level of performance, comfort and versatility to Canadian boaters.

By Craig Ritchie

While Canadians may have been slower to warm to pontoon boats than our southern neighbours, that’s definitely changed as we see more of them gracing our waters every year. The latest data shows pontoon boats now represent around 30% of all new boats sold in Canada and it’s easy to understand why – with their interior space and tremendous versatility, pontoons are near-perfect family runabouts.

Read More


Cruising Georgian Bay’s 30,000 Islands: Canada’s Freshwater Paradise for Boaters

By Elizabeth Wilson, “Georgian Bay Beauties” (

The Plan

It’s a beautiful morning as we perform our pre-departure checklist, fire up the engines and prepare to release our lines. And if the long-range forecast of very low winds coupled with plenty of sunshine holds, that’s exactly what we need for the areas we plan to explore on this trip! 

We are departing Midland for a week of visiting some of the islands and anchorages within Georgian Bay’s “30,000 Islands” – specifically those along the western edge. These are the less protected islands which face toward wide-open Georgian Bay, where boaters often have to depart the small craft route and work a little harder at setting the hook but are then rewarded with magnificent western views, stunning sunsets, and so much to explore! 

Read More