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Beside vinyl and maybe cassettetapes there is no need for a rumble filter when running a closed sub. I suppose the matrix guys put the sound there for a reason.

Hi. Last things first i highly approve on your fiberglass plans, but remember there will be a lot of sanding to do. I dont know the parts Express amps in detail, but they probably work fine. Remember: bigger is better.:) For my sub I bought something to grow in when I finally start on...

Do yourself a favour and get a kit. Reading your starting post, you clearly have no idea of the amount of work needed to get a good sounding pair of 2-ways out of those drivers. I´m sure the drivers are as good or better than the pricetag would suggest and supposedly better than any...

Hi. I´m building a pair of 6 ft tall, 2 2,5 ft wide sonotubes because I´ve got a super deal on a used TC-sound 15" pair. To get the most out of the room I´ll place the drivers as close to the floor corners as possible at the ends of the tubes and so they will be down firing. The...

Justin, To perform such a test the front speakers should have the same output level as the sub. You want to detect the difference in phase between the fronts and the sub. Ideally you use a sine frequency test signal equal to the xover freq. Out of phase - reduced output of test tone In...

I think it´s more like 40 Hz, but it´s impossible to know without some measurements. Take down some bass test signals from the net with like 1 Hz increments in the area 30 - 50 Hz and burn a test CD. Get a RS sound level meter and measure very close to the speaker cone at low level without...

Hi It´s very difficult to measure the low frequency response because of room resonances clouding up the picture. The response will also be different as you move the mike to another listening spot. I don´t know your particular test tone CD, but warble tones can be very useful. They are a...

Hi. I wouldn´t be to concerned about the input power ratings on the 6 1/2". I agree on most of your conclusions regarding the HT market. To me, HiFi buffs are generally more competent in science of sound than the typical HT afficionado. We are also older.:frowning: Compared to serious HiFi...

http://sound.westhost.com/project48.htm ;)

Hi. I´ll try to answer som of your questions the best I can but first thing´s first: Do NOT use the car version of the XLS as it will not give you near the low level extension of the basic model. The car version is optimized for small dead closed spaces. 1. No idea. 2. Of course it...

The filter will dampen a 19 Hz tone 3 - 6 dB. The fact that the sub has its tuning in this area is nothing to loose sleep over, taking your room modes in to account. You can always remove/tweak the rumble filter at some later time. Stick with the given alignment. You will need some...

You will have to modify the enclosure in one way or the other to fit the new driver. If you´re lucky you can get away with modifications only to the port.

Isn´t this a very long thread about a small problem?

Sounds to me that the tuning of your system is on the low side, that is the PR,s are on the heavy side. - Have you measured the output of your system? - Are you sure the amp is driven within its specs? - If you are loading it with 2 Ohms/ch most overloadmargins are probably used up if...

Crown amps are PA - amps as far as I understand. I wouldn´t recommend it. This is because of no guaranteed success. More power OK - better sonics NO. The thing to go for would be a 5ch, a 3ch or 3 identical monoblocs. Keword for you lucky americans: eBay A Crown amp for a killer subwoofer...

I would have listened to it first before starting digging in to the amp. Maybe you like it as it is? It´s always a good idea to know what to change ( and how to ) before you do it right? The next best thing would be to have someone ( don´t count me in for the moment ) running a sim on that...

David: A 3/4" tweeter must usually be crossed at +3kHz. This means that the midrange will be driven in an area where it really becomes directive and where the dredded cone edge resonances starts to become apparent. This is why you seldom see those drivers in newer constructions. 1" domes have...

A rumble filter can be a very good idea if you plan to play vinyl with your sub. I see no use for it with digital sources.

Thanx, it shure was!:emoji_thumbsup:

Sorry, but what´s the FRD site?

Hi. You defeat the internal amp by connecting the input to ground. Then it gets no signal. This can be done by a makeshift shorting plug that you easily make for yourself. I have done all the above 10 years ago, but on a 2 ch integrated. The real bitch is not the electronic part. It is the...

:emoji_thumbsup: Excellent!

You seem to be on the right track now. I´m sorry if I was unclear in my language about the blocks, but there are reasons and I was excused once earlier on this thread.:D :D Reading my last post, it comes to me that you can of course try your box out without blocks or stuffing and it can even...

OK On woodblocks: This a mean to change the internal volume of the cabinet. No special size ( if you know how big they are you know how much smaller the volume became ) or placement. You just smacke´m up/in there with a gluegun. Its not more complicated then Mc Donalds. There´s space in your...

Check out the Peerless XLS 10´ here:http://www.d-s-t.com/peerless/index.htm I´m afraid it´s more than $100 though.:frowning:

I would go for the bigger amp most definately. DIY is a lifelong contagious disease for which there is no cure and your next sub project being a smaller, less powerdemanding application is a concept of a very low order of probability.:D:D Good luck and best wishes!! Anders

Steven: While I´m still at it; Remember that when we´re talking box volume we mean the volume of the inside of the cabinet and everything that protracts in to the cabinet, bracing, reflex tubes, the driver basket and so on must be subtracted from this to give you Vb ( box volume ). The shape...

I really like it to. Keep it up!!:emoji_thumbsup: :emoji_thumbsup:

The 0.6 Shiva will do very nicely Steven and as a matter of fact, all of Peters suggestion would be perfect for you I think. If you want to play ( THIS IS A VERY GOOD ADVICE!! ), oversize the box to a volume translating into Qtc = 0.5 for the Shiva and then you can utilize the box for Qtc 0.5...

Ha, ha, that was really funny to me:D, but if that is the case, I think he makes very much out of it!