1.8ft3 sealed

[Relic1Golf]

Eminence Lab12 or Dayton HF 12 4ohm subwoofer in a sealed enclosure with a 500w bash amp? Im looking for clean sound with minimal distortion down to mid 30s for home theater use.

 

[Relic1Golf]

I think I answered my own question, the eminence lab12 is good for 2ft3 sealed and the dayton HF 12 has a Q of .7 at almost twice that.

 

[head_unit]

Box stuffing can increase the apparent volume, but probably not enough to get the Dayton where you want it.

However, I still urge stuffing, as it can greatly help clarity by reducing higher frequency reflection.

 

[Relic1Golf]

Im going to get the eminence lab12 using about 20-40% polyfill. I already got the MDF measured and cut down, just waiting on the driver and time off to build it.

 

[Inductor]

Yes, in fact the Dayton Audio RSS315HF-4 needs slighter bigger enclosure than the Eminence LAB 12 (the Eminence Lab 12C High has also less LF extension) on a sealed 2ft³ = 56.6L.
http://www.oaudio.com/docs/manual_v1_6.pdf
http://www.eminence.com/pdf/LAB_12.pdf

(specsw) amp: 325W RMS (into 8Ω load @ <0.01% THD)
Setting the filter to 25Hz (2)
F3 = 48 Hz - (with filter on) 320.9 W (2): pic of freq and excursion shown below with filter activated.
F3 = 43 Hz - (no filter) (1)
(1) amp@listening levels/power, (2) amp using@max power

 

[Relic1Golf]

I wish I could find an Oaudio bash amp, I believe they went out of business a few years ago. I already have a 500w bash amp from PE. Oaudio had a parametric EQ and adj subsonic filter, the PE version is fixed. as far as the graph I cant read whats at the top.

 

[Inductor]

That's why I usually erase that.
It translates (from French):
1. 25Hz filter, red: without filter, blue: with filter.
2. 25Hz filter, red: freefield, blue: with filter, green: only the filter.

 

[Relic1Golf]

ah I see thats pretty close to what I got with winisd and another program that uses excel. I was going to buy a 300w a/b amp and turn it up all the way but I already has a 500w bash amp from a prev project I will probably use. if I set the amp gain to 12 oclock (250w at 4ohms) how would that correspond to driver at 6ohms?

 

[Inductor]

You don't need filter if not abusing it, I would say.
F3 get's lower.
You can have the amp measured for max. speaker output () but I don't think is necessary.
The Lab12 has a max excursion between 13mm to 22mm (Xmech) before destruction. 😀 😀 😀

 

[Relic1Golf]

any idea what the fixed subsonic filter is set to on the bash 500w amp?

 

[yoke]

What is best/recomended volume for LAB 12C in closed box,for music and HT use ?

I'm thinking about buying one (maybe a pair)
, so I can use one driver per cabinet and make two subs (one for each chanel) or maybe use two drivers in one cabinet ?

I belive that one driver in closed box would do for music and HT use ?

Any advice should I use two drivers in one box ? (Does it make sense?)
or just to buy one driver and place it closed box ?

( the smaler the better 😉...I have read that people have use LAB 12 in something like 30-40L closed...but I can get 12C which is lettle diferent )

 

[Inductor]

Ok yoke,
You can do a isobaric with 2 lab12C woofers, one firing to the front and the other to the back (size of the room and space/location of speakers?) but in opposite phase (). Lower frequency extension (less speaker volume/isobaric, if it works) and cardioid dispersion.
https://bobmccarthy.wordpress.com/tag/cardioid-subwoofers/

 

[yoke]

thanks inductor
this is how my room look like
I have living room kitchen and dining in one space , there is no wall betwen living room and kitchen
I draw position of loudspeakers
when it's small apartman

 

[yoke]

I'been thinking...
I think that I need something relativeli small...
maybe to build something like coffe table with driver downfire...
othervise I would have box which have high of 35cm min...
so maybe I should stick with one driver in compresion with downfireing ? (made as coffetable)

 

[Inductor]

Your room is not that big, so, you can do a small speaker with a Linkwitz Transform (LT).
You can have your table then.
ESP - The Linkwitz Transform Circuit

 

[yoke]

Tnx Inductor 😉
Any advice with how many liters should I go for LAB 12C in closed box ?

 

[Inductor]

What you want it's (it will be) fine. How much do you have available (net).
40/30/20L is a good starting point.
Others might have good examples of projects...
(Having in mind that a small woofer would be very much enough.)

 

[yoke]

Whell,I could build something like 50L -60L if its gona be like coffe table.

I have try to simulate LAB 12C in winISD and have F3 of around 50hz in 40-60L.
So I'm wondering should I go with peerless XLS 10 (30L) with scan speak pasive radiator instead 12C ?

 

[Inductor]

...should I go with peerless XLS 10 (30L) with scan speak pasive radiator instead 12C ?

Haha... 😀
For a shallow table sealed, you should go with the best (notice the small room),
8" Scanspeak 23W/4557T00
10" SB Acoustics SW26DAC76-4
10" Dayton Audio RSS265HF-8
Have a nice build. 🙂

 

[yoke]

Tnx 😉
But I would stick to those two 😉
Peerless XLS + SS PR at around 200euro and LAB 12C which I can get for 200euro (per peace).

If I would now start to think about some other solution I think that I will never build one 😉
I can live with one box 30x30x30 (or 35x35x35) for XLS+PR 😉

Have to think 😉
Thanks for advices 😉