Quick answer
Choose the MR692B if you want a larger 1-inch dome tweeter for brighter high-frequency detail and can accommodate its 3.375-inch mounting depth. Choose the MR690 if you prefer a more reserved .51-inch tweeter and the same mounting depth, especially when budget is tighter.
What actually differs between these two 6x9 marine speakers
Both speakers share the same 6x9 size, 2-way full-range design, polypropylene cone, resin-treated cloth surround, composite basket, 3.375-inch mounting depth, and 8.825-inch mounting hole. The main difference is the tweeter: the MR692B uses a 1-inch (25 mm) dome tweeter, while the MR690 uses a .51-inch (13 mm) dome tweeter. That tweeter size affects high-frequency dispersion and output, not the physical fit.
The MR692B also lists a total power output of 350, while the MR690's power handling is not provided in the catalog. If you need a specific power rating for amplifier matching, the MR690's missing figure is a real limitation—check the product manual or ask before buying.
When the larger tweeter is worth it—and when it isn't
A larger dome tweeter can move more air and often plays louder with more detail, which helps on open water where wind and engine noise mask high frequencies. That makes the MR692B a stronger choice for boaters who want crisp vocals and cymbals to cut through. However, a larger tweeter can also sound brighter or more forward in a small cabin, so if you prefer a warmer, less aggressive top end, the MR690's smaller tweeter may suit you better.
Neither speaker is inherently 'better'—the trade-off is high-frequency presence versus a more relaxed treble. Match the tweeter to your listening habits and the space where you'll mount them.
Power, price, and the missing specification
The MR692B lists a 350 total power output, giving you a concrete number for amplifier planning. The MR690 does not list power handling in the supplied catalog, so you cannot compare that spec directly. If your amplifier's output is a key decision factor, treat the MR690's missing rating as a reason to verify before purchase rather than assume it matches the MR692B.
Price is another practical difference: the MR692B is listed at USD 67.16 (compared to USD 97.33), while the MR690 is listed at USD 74.30 (compared to USD 114.31). The MR690 is slightly more expensive in this catalog, so if budget is the deciding factor, the MR692B offers the lower entry price along with the larger tweeter.
Key trade-offs to weigh
- Tweeter size vs. treble character: The MR692B's 1-inch dome tweeter tends to deliver stronger, more detailed highs; the MR690's .51-inch dome is likely more restrained. Pick based on whether you want brightness or a softer top end. Listen at your typical volume before committing if treble preference is your main concern.
- Power rating vs. missing data: The MR692B lists 350 total power output, while the MR690 does not list a power figure. If amplifier matching is critical, verify the MR690's rating with the manufacturer or product manual. Don't assume the MR690 matches the MR692B's power handling without confirmation.
- Price vs. features: The MR692B is listed at USD 67.16 and the MR690 at USD 74.30. The MR692B costs less while offering the larger tweeter, but the MR690 may still appeal if you prefer its tweeter character. Set a budget first, then decide whether the tweeter difference justifies the price gap.
Product facts at a glance
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MR692B: 1-inch (25 mm) dome tweeter and 350 total power output. The larger tweeter and listed power figure make it easier to plan an amplifier match and aim for brighter high-frequency output.
MR692B
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MR690: .51-inch (13 mm) dome tweeter; power handling not listed in the catalog. The smaller tweeter gives a more modest high-frequency presentation, but you'll need to confirm power handling separately if that matters to your setup.
MR690
Which 6x9 marine speaker fits your boat?
Best for
- Boaters who want brighter high-frequency detail and a listed power rating for amplifier planning (MR692B)
- Buyers who prefer a slightly lower price and a larger tweeter (MR692B)
- Listeners who prefer a more relaxed treble and don't need a published power figure (MR690)
Not for
- Anyone who needs a published power rating and cannot verify the MR690's handling
- Boaters with very limited mounting depth—both speakers require 3.375 inches, so measure first
- Listeners who want a warmer, less forward top end—consider the MR690 instead of the MR692B