Question 1

Are these fully waterproof? As in, if the backside of the speaker is exposed to water, will it be okay?

Accepted Answer

Hello, 
The MR692B are not waterproof, they are weatherproof or water resistant, they can withstand the penetration of water to some degree but not entirely. 
Thank you!

Question 2

do these speakers come in 2 or is it just one

Accepted Answer

CONE: Made From Polyurethane, The MR692B 6 x 9 Inch Marine Speakers Provide a Resilient And Durable Material That Can Offer Great Sound With The Advantage Of Long Lasting Speakers
VOICE COIL: Our Voice Coils Are Able To Withstand High Temperatures Yet Maintain Its Strength And Fatigue Properties. Making Our Voice Coils With This Material, Gives Our Speakers The Advantage Of Longer Pay Times With Lower Weights
SURROUND: Treated cloth is an excellent material to be used for surrounds. It is durable and plays well with the cone, providing the entire speaker the proper support for great excursion and even better sounds
TWEETER: The dome shape radiates sound with a wider dispersion pattern than the semi-dome design. Since high-frequency sound waves are very directional, a wider dispersion of the sound waves will give you a larger "sweet spot".
SPECS: Impedance – 4 Ohms, Frequency – 60 Hz to 20 kHz, Dimensions – 10.6” x 7.9” x 4”, Mounting Depth 0 3.4”, Mounting hole8.8” x 6”
WARRANTY: BOSS Audio Systems Provides a Powerful 3 Year Platinum Online Dealer Warranty So Long As The Purchase Is Made Through Amazon.com

Question 3

it says 350w per pair, so does that make each speaker 175w? the description vs photo of one speaker is deceiving

Accepted Answer

The wattage rating on speakers are their CAPACITY...
Like a milk jug has a 1 gallon capacity yet it might not be full...
Wattage from the amp is what fills, at least to some degree the capacity of the speakers...
Speakers don't "push" wattage, it's the amps job to do that...
You can also "clip" ANY amp and damage/blow ANY speaker...
Even just your factory system will damage/blow a speaker if you turn it up too high for an extended period of time...
Clipping any amp has the potential to damage/blow any speaker...
Just because your amp is rated at less wattage than your speaker is NO insurance that your speakers won't be damaged...
Moderation, as in most things, is the key.
Also give your "new" speakers ample time to "break in"...
A low to moderate volume for a good 24-48 hours is required to "loosen" things up...
Enjoy !!!

Question 4

Do i need a amp for these?

Accepted Answer

With Audio it all comes down to what YOU are happy with. Face it, the Marine Speaker choices we have are limited. We buy a marine speaker for its waterproof properties not the awesome sound we expect to receive. The cockpit of a boat is not the ideal sound enclosure with the combination of wind, engine  and other noise competing with your tunes.I have not installed these yet, so my response is solely based upon the manufacturer's specifications. Some will be happy with the sound right off the stereo head unit and others will not.The Mfg. states "350 Watts MAX 175 Watts RMS @ 4 Ohms". I could not find what the "Nominal" rating was on any site for these speakers. "Nominal wattage" is typically the minimum power (Watts) that is needed to drive the Voice Coil of a speaker to achieve decent sound, anything less will likely sound as if it were coming from a tin can. I assume with the given MAX and RMS ratings provided that the "Nominal" power rating will be around 50 watts/channel. Check the output of your Head unit, know that 50 Watts@ 4 Ohms is equivalent to 25 Watts @ 8 Ohms or 100 watts @ 2 Ohms. With that said... Watts RMS is the power that the speaker can drive continuously and Max is the Peak that the Speaker can handle. This all assume that you are driving clean amplified sound and not driving sound from a crappy amp @ 10% THD (Total Harmonic Distortion). You can easily blow a 350W MAX rated speaker if you run distorted sound though it at a lower power rating. I plan on driving four of these speakers with a Kenwood head unit preamped into a 4 channel Fosgate amp rated at 150Watts/channel RMS @ 4 Ohms at 0.01% THD.  Without a Subwoofer, this should be enjoyable while cruising or at anchor.  There are many other speakers that will outperform these but they are not waterproof nor are they less than $100/pair.  I hope this helps.

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BOSS Audio Systems MR692B 350 Watt Per Pair, 6 x 9 Inch, Full Range, 2 Way Weatherproof Marine Speakers Sold in Pairs

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