Goldwood Sound GW-212/8 OEM 12" Woofer 240 Watts 8ohm Replacement Speaker

Q: is the speaker 12" from the edges of the whole thing or from just the actual speaker

overall size is 12", fits enclosure hole size of 11.25", mounting depth is 4.75"

Q: Does this sub sound best in a sealed or a ported box? And also what is the ideal size box for this sub?

A ported box. My speaker is 18 inches by 30 inches.

Q: are this sold as a pair?

This is for 1 piece, but you can buy 2 for a pair!

Q: Can i use 2 of these 12" at 8 ohm on a dayton audio spa300-d (4 ohm) on low pass? trying to build a bass buttom for my self powered 15" mid/high top

The unit I got was not rated at 250 watts. It was maybe, 100 watts peak. If you used them that way, you would have to wire in parallel to get to 4 ohms. I don't recommend these speakers for hi power bass applications; very cheaply made. Just look at how tiny the magnet is. Very small voice coil.

Product ID: 574271339

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Details

Brand
Goldwood Sound
Speaker maximum output power
240 Watts
Connectivity technology
Bluetooth
Audio output mode
Surround
Mounting type
Flush Mount
Model name
OEM 12" Woofer

Specifications

Is Electric	No
Power Source	Corded Electric
Number of Power Levels	1
Speaker Maximum Output Power	240 Watts
Subwoofer Connectivity Technology	Wired
Connectivity Technology	1/4 inch TRS or XLR
Audio Driver Size	12 Inches
Number Of Circuits	1
Audio Driver Type	Dynamic Driver
Item Weight	0.01 Ounces
Item Dimensions D x W x H	12"D x 4.75"W x 12"H
Unit Count	1.0 Count
Impedance	8 Ohm
Number of Audio Channels	1.0
Frequency Response	28 Hz
Compatible with Vehicle Type	Car
Compatible Devices	MP3 Player, Laptop, Desktop, Tablet, Smartphone
Speaker Size	12 Inches
Woofer Diameter	12 Inches
MP3 player	No
Specific Uses For Product	pro DJ speakers, pro PA speakers, pro karaoke speakers, live sound speakers, fixed installation speakers, studio monitors and home audio speakers
Controller Type	Voice control
Color	Black
Is Waterproof	FALSE
Control Method	Voice
Audio Output Mode	Stereo
Mounting Type	Flush Mount
Material Type	Polypropylene or Aluminum
Speaker Type	Woofer
Additional Features	Bass Boost
Recommended Uses For Product	For pro DJ speakers, For pro PA speakers, For pro karaoke speakers, For live sound speakers, For fixed installation speakers, For studio monitors, For home audio speakers
Subwoofer Diameter	12 Inches