Best Enclosure Dayton 10" DVC with 70 Watt AMP?

[subbu567]

This woofer works well in large enclosures. Not so much so in small ones. I think this has been pointed out redundantly by the other posters. 1.5 cu ft or 1.3 cu ft, as you have modeled, is much too small to do this driver justice. Tuning it to 30 Hz in those enclosures gives you an f3 of 43 - 47 Hz. By the time you reach 30 Hz, the point where a lot of HT special effects take place, the output will have dropped by 10 - 12 dB or so.

In addition your suggested 3" port tube will produce a port air velocity of 86 ft/sec at xmax, which is much too high. Chuffing will result. Port compression will occur well before chuffing is evident and compromise port output, reducing the already low output at low frequencies.

I consider using this driver in such a small enclosure akin to gagging an opera singer. The singer would probably still be able to produce audible sounds, but the performance would be far from attractive.

Of course this whole debate may be moot as the OP occurred on 01-04-2010!

sir-thank you for the clarification-I have posted my query,above, on 12th July 2012 ! Any help would be greatly appreciated !

[mdocod]

This woofer works well in large enclosures. Not so much so in small ones.

ALL low frequency transducers benefit from larger, more sophisticated boxes. This unit is no exception to this rule, and as such, since size limit was requested, it is in the OP's best interest to be told how to best use a given amount of available box volume.

I think this has been pointed out redundantly by the other posters. 1.5 cu ft or 1.3 cu ft, as you have modeled, is much too small to do this driver justice.

Justice in this case, is not for you to decide. Either the sealed or vented box here would need some EQ and be pretty SPL limited but the vented option is LESS limited. A box size limit was requested, I provided the best use of the available space with the driver in question, something nobody else bothered to do.

Tuning it to 30 Hz in those enclosures gives you an f3 of 43 - 47 Hz. By the time you reach 30 Hz, the point where a lot of HT special effects take place, the output will have dropped by 10 - 12 dB or so.

The point is that it beats the response and maximum output of the sealed box at nearly all frequencies for the same size. My suggestion is in regards to the original size limitations requested.

In addition your suggested 3" port tube will produce a port air velocity of 86 ft/sec at xmax, which is much too high. Chuffing will result. Port compression will occur well before chuffing is evident and compromise port output, reducing the already low output at low frequencies.

I don't know what sort of simulation you are running to predict this. It's plain wrong. Peak air velocity is 11m/s ~@25hz with the flared port suggested. You can't use WinISD to get a proper vent air velocity on the port I suggested in this box. (or bassbox pro, or more other programs)... You have to simulate the vent, the flare,the Xmax limitations, and the air velocity all together.

I consider using this driver in such a small enclosure akin to gagging an opera singer.

That's what people think when they don't see a straight line. If you don't like this box size for this driver, then you can't like this box size for any driver. You won't believe me because it doesn't make sense now, but run a few thousand more simulations and stop looking for straight lines, start making honest comparisons. (look at "max SPL" based on both Xmax and Pe limitations, also, look at power requirements to achieve gains).

The singer would probably still be able to produce audible sounds, but the performance would be far from attractive.

The only solution that will impact this "problem" in your eyes, at a useful level, is either a significant increase in box size and/or sophistication, or a significant increase in driver displacement and amplification, or some balance of the bunch. More importantly, you're "blowing the reality" of it out of proportion, small variations in maximum output at low frequency are hardly noticeable by most people.

Of course this whole debate may be moot as the OP occurred on 01-04-2010!

CRAP NUGGETS!

lol...

Well, that explains a lot, I guess this happens to the best of us.

Regards,
Eric

[thekorvers]

Pugnacious aren't we? Some of your answers are non sequitur, but no sense in arguing with you. I guess you are one of these people who cannot be wrong.

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[mdocod]

Hello thekorvers,

I'm not interested in a quarrel, rather, the truth. I have no hard feelings towards you. My endeavour in tearing apart your post (sorry, I know it's not polite to single you out like this), was to correct a multitude of misconceptions. I do not believe you are at any fault for any of the fallacy. I have, probably shared many equally incorrect posts in my history, and effectively spread similar misconceptions. The reality is that, the vast majority of us on these types of forums, are in a state of learning. I am in a state of learning myself. I was once saying the exact sort of thing you said about the driver in question here. I used to look for that "flat line" box simulation and thought I knew it all at that point. Boy, was I in for a shocker.

Regards,
Eric

[generic]

I ordered two of the older 10" shielded versions when they were on clearance. For light HT and music use, I think you will be happy. I built a larger sealed box. With room gain (depending on the size if your room), you should be able to have a usable 35hz before a huge roll-off takes place. Corner loading will give you a little more, but it doesn't sound as good. I pulled mine away. It did do HT duty for a little while as a HTIB sub upgrade, but now it's hooked to my computer. I think they are good subs for what they are. I've lost the WinISD file, but I think I built a 1.75 square foot box. SQ is really good for a $40 subr. Even better when they were $20. They are a value, but they just don't hit hard, take power, etc.

[thekorvers]

Hello thekorvers,

I'm not interested in a quarrel, rather, the truth. I have no hard feelings towards you. My endeavour in tearing apart your post (sorry, I know it's not polite to single you out like this), was to correct a multitude of misconceptions. I do not believe you are at any fault for any of the fallacy. I have, probably shared many equally incorrect posts in my history, and effectively spread similar misconceptions. The reality is that, the vast majority of us on these types of forums, are in a state of learning. I am in a state of learning myself. I was once saying the exact sort of thing you said about the driver in question here. I used to look for that "flat line" box simulation and thought I knew it all at that point. Boy, was I in for a shocker.

Regards,
Eric

Thank you for your post. Point proved.

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[billcurrier]

Passive Radiator?

[subbu567]

Gentlemen-You guys are amazingly helpful-I live in Bangalore India-Bought the 10" DVC and 240w plate amp with Bass boost!I find the amp is an over kill for the driver-I bought the one with bass boost because I wanted to make a sealed cabinet.I have made one with ~68 liters volume-The sub works well when the tritrix mains are subdued-ie @ -30db level on my Denon receiver.Sounds full and tight-However if I drive up the volume levels in the receiver-The sub slowly starts to fade away-and simply bounces like a tennis ball against the wall -with apparently no volume to match up higher sound from the mains.All settings and integration done by Audessey and manually tweaked it quite a bit as well-To cut a long story short-I intend to make a ported box now as suggested above-Winisd says @ 75l with a port of 82mm diaX247 m length-the tuning is @28hz-which is close-Now will my new configuration work?since I have +6db @30hz with my amp-will end up blowing the speaker?any other work arounds? buying another driver etc-takes 6 months cycle time as I need to wait for some one to come from US to bring home my goodies hence ruled out.thanks

Gentlemen,in a way I revived this thread with my post above,and somehow manged to be ignored.No complaints,learnt a lot.To update,Made a 73L ported with a 84 mm X 225mm port- tuned to an f3 of 28.9 hz,the results(listening impressions)are well pronounced.More thump and volume,the glass door in the kitchen started vibrating when I played the 'under the bridge'.so by experience I can conclude these drivers are more suitable for ported design.


But a v litlle loss in 'tightness' for the Volume ,I guess.