Boston Acoustics SPG555-2

This sub can be found for $350. I bought mine with the 1 f^3 factory sealed enclosure, then cut an oval out of the back (opposite the driver) and installed the passive radiator (free +3db with dummy cone) tuned to 30hz (with supplied weights). I am powering it with an MTX 81000-D, birth sheet says 1308 watts rms into my subs 2ohm load. I have read the SPG can take 1800 watts rms. I don't doubt this, as I am shopping for a bigger amp now. I have the gain set for 51 volts at my max volume, which shows no clipping on my oscilloscope and equals 1300 watts on my 2 ohm Boston. Have not melted the coil at max volume yet. Max temp of the plastic on the outer ring of the outside of the voice coil (its perimeter) I have measured with a laser no contact thermometer is 212 F. It did not fail at that temp. I did melt the coil once with the same amp, but gain was set too high on a road trip (6hrs of Tech 9 and Mike Jones) and it was clipping the signal. I did not have and oscilloscope or volt meter (51v rms ='s 1300w) to set the gain on the road. The replacement surround and voice coil just keeps getting louder, and runs cooler. It has been about 2 months of listening at full volume Bass Mekaniks and still the spider is getting looser and the sub getting louder, and now runs at about 98F after HARD hitting tracks. I also blew the surround out once when my girl opened my truck at full volume, thus unloading the driver and allowing over excursion (stretching the foam surround excessively). Evidence it is getting louder: volume 24 was max voltage for the amp and listenable. Now, volume 18 hurts my ears. My left ear is ringing and popping during the day, and my girl friend says both her ears are waxing more and damaged. Also, the whole car is shaking now, window, seats, dash, sodas in the console. Also, DVD navigation disc in the trunk just skipped and wouldn't operate for the first time the other day. This sub was made to conquer the 13W7 (and I read it did), Boston is way underrated, and audiophile grade. That is why I bought this, is does not distort a note, and shakes my whole car, all for 1 cubic foot! The only other sub that could come close for 1 cubic foot per sub would be Premier SPL sub. Recommended 1.5 f^3 per 12". So, 2 x 12= 3 Premier SPL. Also, equals 3 SPG + 3 passive radiators, total, 3 cubic ft. Although, the RE XXX does recommend max of 1.1 cubic ft sealed for their 12", and JBL MKII 12" recommends 1 cubic ft for sealed 12. Can somebody produce a louder sub in 1 cubic ft that Boston with the SPG 555 teamed with the passive radiator (which increases output by 3db but doesn't affect box volume)?

This sub hits low and hard. If you don't have much room get this; it is a very high quality product.

Just hooked this monster up today and WOW!!! crisp and clean bass. sounds amazing. by far the best subwoofer I have ever owned.

Just for your info this sub can handle anywhere from 100-1000rms...and it is light weight. I have it hooked up to the rear channel of a T8004, I'm giving around 600rms to it, in a sealed enclosure and i have to say i love the way it sounds. For simple use this sub will be more then enough if you have around 500-600rms. This sub only has pros in my book with only two cons, first it only has a single voice coil, 2 or a 4, but that is almost not a con for you can switch out the voice coils at any time with ease. Second you have to either make a sealed box yourself, i think this site has a ported, or convert a one cubic foot box into an oval shape.

On another note i have not tried to max this thing out to see how loud i can get it for that isn't what I'm using it for. I use this for quality sound and i am impressed with it, though if i were to put it in a ported i doubt i would be able to hear for long for its already loud as is. For those of you debating on getting a cheaper sub i would give the cash for this one any day for i was debating on going cheaper and I'm sure glad i didn't. This is one nice sounding sub.

13" Single 4 ohm SPG Series Oval Subwoofer • 1000 watts RMS • Polypropylene Cone Woofer • Foam Woofer Surround • Radialvent® Cooling • Removable Voice Coil (RVC™) • Soft Part System (SPS™) • Integral Sealing Gaskets • 3-1/2" Voice Coil