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-   -   best budget woofer for 1 cuft sealed sub? (http://www.diyaudio.com/forums/subwoofers/220710-best-budget-woofer-1-cuft-sealed-sub.html)

Bill poster 30th September 2012 03:41 PM

best budget woofer for 1 cuft sealed sub?
 
Looking for something around 8" with good response and reasonable sensitivity - the admittedly not budget RSS210 needs too much power for my application.. modelling various drivers but not much luck so far.

PB2 30th September 2012 04:36 PM

How much power do you have and will it drive 4 ohms?
The general thinking is that power is inexpensive these days and if you want
a small system you need more power - the power, bandwidth, efficiency
tradeoff.
Also, the trend for subwoofers these days has been to go for very large
Xmax which generally results in lower sensitivity.
You mention sealed, try to keep the Qtc up so that you get better sensitivity
at Fc.

Bill poster 30th September 2012 05:36 PM

I'm using an active 2.1 plate amp, output is 50w @ 4 ohms to the sub, so have to choose the drive units to suit. looking for a high qts and low moving mass. The 8" Hivis are good but they are 8 ohms

chris661 30th September 2012 06:52 PM

I'd go for a pair of the 6.5" TB sub. The ferrite version is cheaper.

I'd also go ported, tuned ~35-40Hz.

Wire for 8ohm and see how that goes. You have the option for 2ohm use later, but you'd need to be careful with the volume control.

The pair of 6.5"ers ported would wipe the floor with a sealed 8" in terms of output and (probably) extension.

Run the sims, see what you think.

Chris

cotdt 30th September 2012 07:45 PM

in a 1 cubic feet enclosure you can use a 10" or 12". in america we have the cheap dayton reference HO subs for small sealed enclosures on the cheap.

PB2 30th September 2012 08:41 PM

You might try auto sound sub woofers which are mostly 4 ohm or
dual voice coil and there are some real bargains. Some of the low
cost Rockford Fosgate are well suited to a sealed system but I
don't know if they meet your efficiency requirements. I suggest
that you simulate some to see how they actually perform.
This for example but it probably needs 1.5 - 2 cu ft:
http://www.rockfordfosgate.com/produ...?itemid=112932

Don't know if their smaller drivers are as well suited to sealed.

Bill poster 30th September 2012 09:48 PM

Thanks Chris for all the other replies. I am not sure if my small 50 w amp will drive the big Dayton HF or HO drivers, most would say 100w minimum to get them performing properly.
The TB 1138/9 are very good but for various reasons I would like to go for a sealed sub. I either take the risk with the RSS210 or maybe try the 90db Polk MM840, with a 0.6 qts and low fs, altho its not a light cone and transient response is important to me.

4Torr 30th September 2012 10:24 PM

I would definitely go with the Dayton Audio RSS265HF-4 10" Subwoofer. It's actually more efficient than the 8 and is ideal for a 1 cu ft sealed cabinet. Cone weight is not a factor as the Dayton 10's response is pretty flat past 500 hz. Your transient response should be fine. The increased Xmax will give you lower distortion and less power compression at high volume, even if you don't use it all.

Dayton Audio RSS265HF-4 10" Reference HF Subwoofer 4 Ohm 295-460

Josephjcole 30th September 2012 10:32 PM

Aren't we just dealing with Hoffman's Iron Law here? You want a subwoofer to fit into a 1 cubic foot box, and want higher sensitivity. How high a f3 are you willing to except? Sensitivity aside I would think the Dayton 10" HF would be a perfect fit. If you want higher sensitivity than that in a 1 cubic foot box you would maybe be looking at f3's higher than what most would consider subwoofer territory. How low do your current speakers go?

edit:
4Torr beat me to the 10" HF recommendation......

Bill poster 30th September 2012 11:22 PM

1 cu.ft box, sealed, high sensitivity of 89db, f3 of 42hz, f5 of 35hz, f10 of 25hz =
Polk audio MM840! v similar performance to the Dayton RSS210 but better sensitivity.
http://www.polkaudio.com/products/mm840

Yes its a car sub, but gets great reviews for its tuneful bass. Just wish it didn't have the cone logo.


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