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Question your need for more power and how you came to the conclusion of needing 500-800 watts.
Question your need for more power and how you came to the conclusion of needing 500-800 watts. Keep in mind that doubling the power to 800 watts would only add 3 dB and going from 400 to 500 watts would produce less than 1 dB (imperceptible) increase in output. Running double the rated load on the driver could result in burning out the voice coil. If somehow you "need" more bass output, recommend buying another subwoofer. But first suggest measuring the room using REW or Dirac. Rooms inherently have bass peaks and dips that can easily reach 30 dB. Multiple subwoofers (3 or 4) set up in the corners or mid way along each wall is the best way to address the peaks/dips. Refer to Floyd Toole's "Sound Reproduction" (either edition).
I'd go with a Crown amp, tons of power and grip, rugged build quality and only moderately expensive. It's not a great amp for mids/highs, but it just fine for bass.
Yeah, doesn't make sense. Your Parasound should provide more than enough power for a 10" subwoofer. How big is your room? Nonetheless, for your budget, you can replace your sub with one or two used 15" powered subwoofers.
Something is wrong here, maybe you are sitting in a null or the phase is wrong. Or the Dayton is just a crappy driver for a sub. Or your cavernous space is too big for a 10" driver.How big is your listening room anyway?I use a REL Gibraltar G2 sub which has a 10" long throw carbon fiber driver and a 450w high current class AB plate amp. My room is 326 sq.ft./2608 cu. ft. and that little sub completely fills the room with tight bass down to 18 Hz. I use the sub for both stereo and home theater and the dramatic scenes can make the sofa vibrate. Crossover is at 30 Hz and the volume is at about 1/3.The current REL Gibraltar G1 MkII with the 12" driver has over 2” of stroke only has a 600w amp and is capable of 112 dB output at 15 Hz.That Parasound 2125 should be bottoming out that driver. What is your crossover arrangement? How many volts go the the Parasound - 2v-8v? Maybe the volume is too low.
Perhaps consider a used Mivera IcePower AS1200as2 amplifier. They use the two channel version of the IcePower modules PS Audio uses in their mono AS1200 amps. I have both a Mivera AS1200as2 amp with all Furutech wiring and connectors and the PS Audio M1200 amps and they're both excellent amplifiers at their respective price points. Bass reproduction is a strong point. Go to over to HiFiShark.com and use their search engine, there are Mivera amps for sale now.
The room is a small living room but extends into the kitchen so its probably 400 sq. ft.
While I appreciate the thoughts, the room does not need another sub and there isn't space to add one. The problem that I'm finding is in the way that the amplifier drives the sealed enclosure. One sub is plenty for the room and I'm not a fan of adding subs unless they can be placed in the room wherever the phase problems are minimal and that is not the case here. My wife doesn't want more speakers and I know that I don't need another sub. I just want to try a more powerful amplifier, specifically a class D amplifier (due to efficiency) to see if I like the results better because I know that headroom is important for driving low frequencies.Additionally, I understand that you may have a lower powered sub for your living room and it rocks the house, but it is likely a ported enclosure, which requires a lot less power to do so. Plus, the way that wattage is measured can be drastically different from amplifier to amplifier so we are often comparing apples to oranges. Plus, we might be listening to different music and utilizing a different amount of low end. I listen to everything from jazz to hip-hop and metal. I also use this system for movies and enjoy the low end being louder than most people (after it's properly EQ'd). So I'm really just looking for a Class D amplifier that is rated at a higher wattage than my current amplifier (not sure if it will actually deliver more power in this situation but that's the hope).
