BOSS Audio Systems ASK904B.64 Marine Boat 6.5 inch Speakers and review

Overview of the ASK904B.64 setup

The ASK904B.64 is designed as a complete marine audio starting point: a 4-channel amplifier paired with two pairs of 6.5-inch full-range marine speakers. The emphasis is on getting sound playing on the water and in outdoor vehicles without needing a traditional stereo head unit.

• Amplifier: 4 channels with 500 watts max power (rated as 500 max x 4 at 4-ohm). The amp is described as 4–8 ohm stable with RCA outputs.
• Streaming and control: Bluetooth streaming plus an included inline multi-function remote for controlling music from a Bluetooth device. USB charging is supported via a USB-to-AUX style adapter, and auxiliary input is also available.
• Speakers: 6.5-inch full-range marine speakers, rated at 180 watts per pair, with a frequency range of 80 Hz to 20 kHz.

Bluetooth without a head unit is a big part of the appeal

If your goal is to add audio to a boat or outdoor ride without cutting your dash for a full receiver, this system is built around that idea. It powers up and handles audio from Bluetooth devices, with remote control included so you can change tracks or manage playback without reaching for your phone as often.

Review feedback reinforces that the “easy to connect a phone via Bluetooth” experience is a major reason people stay happy after installation. For buyers who mainly want Spotify, Pandora, or other phone-based streaming, this kit’s approach is straightforward.

Installation experience: what to expect

Buyers repeatedly describe the install process as manageable, especially because the setup is supported by a manual and labeled wiring harnesses. That said, “easy” often means “still requires patience.” Marine installations can involve tricky routing, careful grounding, and a clean mounting cutout.

There are a couple of installation friction points worth planning for:

• Flush mounting fit: Some buyers found that a small lip around certain components can make the flush-mount cutout process feel tight or stressful. If your cutout tolerances are critical, measure twice before cutting.

If you are new to wiring, build in extra time and use the manual as your checklist. Keeping wires unpinched and avoiding accidental grounds is essential for stable operation.

Weather resistance and marine-oriented connectors

The system is marketed for weather-resistant use, and it includes weatherproof connectors intended to help prevent corrosion. While no electronics are immune to harsh conditions, this is the right direction for buyers installing in environments where splashes, spray, or damp conditions are part of normal use.

Sound quality and loudness: buyer expectations

Review sentiment leans toward “good for the category.” Buyers describe the system as loud enough for listening around the driveway and onboard, with sound quality that is “pretty good” or “quite acceptable” for a starter marine package. That matches the practical role this kit appears designed to fill: clear everyday music rather than premium, meticulously tuned audio.

If you are chasing deep bass, crowd-level volume, or audiophile-level detail, you may want to compare against higher-end marine setups (for example, kits with dedicated subwoofer amplification and more advanced DSP tuning). If you want a clean, Bluetooth-controlled system that just works for casual listening, this kit fits the brief.

Who should buy (and who should avoid)

Best for buyers who

• Want a compact marine amp + speakers package for boats, PWC storage compartments, or other outdoor setups.
• Prefer phone-based music via Bluetooth and want an inline remote to control playback.
• Value an installation process with labeled wiring and a clear manual.
• Need a weather-resistant, marine-oriented starting point rather than a complex audio system.

Consider looking elsewhere if

• You do not have the space or tolerance for a flush-mount component, or you cannot take extra time to confirm cutouts and fit.
• You need long, straightforward speaker runs with no chance of wire swapping.
• Your priority is top-tier audio performance with more advanced tuning or a more premium speaker lineup.

Key specs to compare before you buy

Use these details to confirm fit for your setup:

• System type: 4-channel marine amplifier with 2 pairs of 6.5-inch full-range speakers.
• Amplifier power: 500 watts max x 4 (at 4-ohm), with stability described as 4–8 ohm.
• Amplifier dimensions: 7.8 x 3.8 x 1.8 inches (check your mounting space).
• Speaker mounting depth: 2.2 inches, with a stated mounting hole size requirement.
• Speaker frequency range: 80 Hz to 20 kHz.
• Marine angle: weather-resistant design emphasis and weatherproof connectors.

Verdict

The BOSS Audio Systems ASK904B.64 is a practical marine audio package for buyers who want Bluetooth music streaming and control without installing a full head unit. The install experience is often described as straightforward thanks to labeled wiring, and buyers generally find the loudness and sound quality solid for a starter system. The main reason to slow down is installation fit and wiring planning, including flush-mount tolerance and potentially upgrading speaker wire for longer runs or marine suitability.

View latest price on Amazon: Buy on Amazon

FAQ