21X21X21 external dimensions, so pretty big... I'm thinking about making a small deathbox for my car her in the near future, just have to do some research about how hard it would be to hook up an amp and sub to my stock stereo in my car... I bought some sealant and I brought home all the foam, gunna install it here in a sec.

Sorry for the long delay... I've been super busy at work and then I had a friend come and visit from Columbus over the weekend. I just transferred all of the photos off my phone and here's what it looked like:

Messy....


Finished box with the top off.


Top on.


Amp fitted.


Insulation and speaker hooked up.


Finished and sealed box with a 2 liter for comparison.



All in all, for the money I spent, I am fairly pleased. The low end isn't as good as I had hoped for but oh well :/ I can rumble the walls/light fixtures/basement door with it so that's pretty awesome. You can also hear it anywhere in the house, which really annoys my mom

Nice looking box. So about 4.2 cuft sealed. Remember you still have the option of boosting the lower octave with the resistor substitution.

Plus you can still try adding a 4" port to boost the overall output if you calculate out a proper length for it. And if you can't get it to sound right by adjusting the length of the port tube, well you can just seal it back up. ( ;

And yeah bass has an annoying habit of carrying a long ways. hehehe

which bass boost by switching resistors would you recommend? The data sheet shows a bunch of different ones. Yeah, I could also try a port. Would that affect the way the bass filled the room in any way? It seems to pool in the obvious spots like corners and such. I placed it in the corner that I heard the most bass in; I read you could do that for best performance.

I have no experience with these units so I can't recommend any values. One thing you should do though is verify if any of the lower octave bass is actually present in your source material. All FM radio stations cut off low end response around 45 Hz. There simply is nothing lower than that in the received music so there is nothing to reproduce. Much recorded media intended for mass broadcast may also conforms to this low end cut off as well. Why include such deep notes if you know they will never be transmitted and few systems are capable of reproducing them.

Maybe try picking up an RIAA preamp and connect a turntable to your little amp and play some older records just for comparison.

I'm fairly certain that I have a some music from a few artists that have very low frequencies. I also have a program on my computer that allows me to generate tones, so I may bring my laptop down there soon and make some nice and low tones.

stalker are you still here?

I hit jackpot at a thrift store - got a pair of Infinity RS5 speakers and a Onkyo TX-SV535 receiver.

The speakers are amazing in their clarity and lifelike reproduction of voice. The bass is incredible for such small drivers, compares with my reflex 12 inch Altecs.
I think they're a labyrinth of some sort, with a rear port - do you know a link to educational site on labyrinth design?


a.

i see this has been an often viewed thread last couple years. That's gratifying - i sure enjoyed seeing Dan's progress!!!
And i learned a lot. That enabled me to design & build some speakers for my retired neighbor, an elderly gentleman who complained he couldn't hear his TV. Made a reflex enclosure tuned for 44hz Q of 1.1, shelved the mid/tweeter about 6 db high for his ears... like me he has hf hearing loss... first time we turned 'em on he lit up "I can HEAR it now!"

Thought Stalker might find this tube amp interesting because of the choice of readily available power pentodes - TV horizontal drivers!

Thanks, all!

a.

oops here's link to that tube amp...
http://www.pmillett.com/DCPP.htm

a.

I own 4 of these Mattes SSP-200 amps! Back when Mattes Electronics was in full swing, I bought their integrated version and loved the preamp. At that time Mattes blew away everything on the market, and McIntosh hated Mattes, so much that if any Mattes showed up at their testing clinics, the techs were told to blow the fuse, so it couldn't be tested. My integrated was very unique, in that it put out 120 RMS per channel, because I took it to the factory in Chicago on a Saturday and the Manager Tech did some modification changes to mine to bump it up 20 RMS more per channel!
I am now 68 years old and became an extreme audio enthusiast in my early 20's. When I discovered the Mattes sound I went banannas, there is nothing like it even to today! Back then I used Altec speakers with the 811 horn and 2-15" woofers in each cabinet, (bass reflex, very high SPL), I eventually bought 2 more of the same Altec's, and wired the woofers to add a doubleing factor. The extreme power and unbelievable low distortion, blew everyone away, with no fatigue after hours of high level listening. I was into rock music back then and the Mattes was the only amp that could 100% deliver the full dimension of sound on recordings like Led Zepplin's Dazed & Confused, and Edger Winters Transulvania. I bought all of my 4 Mattes amps on Ebay from people who had no idea what this exactly was in grandpa's closet.
Of course there's always a down side, being I'm retired in Phuket Thailand now, and can't presently find a knowledgable tech to work on 2 of them. I tried many times to get a sam on line, but only wound up with a very faded copy for $20. Power surges are common in Thailand, so I use a CPU to try and protect my baby, some what.