Alpine amplifiers are used to amplify sound of digital equipment such as Subwoofers. You can purchase Alphine amplifiers online from retailers such as Amazon.
Alpine by far.
2x20 Watts
current series feedback amplifier=series parallel feedback amplifier or voltage to current amplifier,or TRANS CONDUCTANCE AMPLIFIER.
Alpine skiing uses gates.
Thats really an opinion both brands are good amps and both are tested to show their correct wattage if not more than
Alpine offered up until last year the PDX-1000 wich is a 1000 Watts RMS amplifier designed with the type X subwoofer series in mind. Now the best match would be the PDX-M12. Set the amplifier gain carefully as this amplifier is a bit strong for this subwoofer.
The Alpine v12 MRV-F505 amplifier puts out up to 200 watts of RMS power at 4 Ohms and using 12 volts. At 14 volts, it puts out up to 400 watts of RMS power with a bridged 4 Ohms ratio.
This type of amplifier has 75W x 4, V12 High Power Amplifier, MOSFET Power Supply, Non-Fading Pre-Amp Output, and Bass Engine.
To parpahrase Henry Ford the Alpine V-Power MRP-F300 comes in any color you want so long as it's black.
According to Alpine's website the dimensions are (WxHxD) in: 10-15/16'' x 2-23/64'' x 9-27/32''
The Alpine MRV is an amplifier that is used in car stereo's. There are many different models in the MRV line. On ebay you see prices from $50.00 for older units, on up to $1250 for current new-in-the-box models.
You could use any amp size over 100 watts for great sound production.