Goal: 40Hz, 92-94dB, 2 cu.ft

[cosmindaniel12]

Hello guys.

I would need an advice for the woofers in a 3-ways system.
I was hoping to go down to 40 Hz (around 35 Hz in room), in an enclosure around 1.5-2 cu.ft, with an sensitivity of 92-94 dB (close to 90dB including the baffle step). Also, to keep the price under 100/speaker for the woofer(s)...
Also, I was hoping to do that with paper-cone drivers (I'll use paper midrange and soft dome tweeters). The best solution I could find was a pair of Visaton W 200 S 8 Ohm speakers...

I know I'm asking for a lot... but... any advice, please?

[Pit Hinder]

Visaton, and that driver, are a good idea - and they do excellent customer service. They might help you with complete plans for box, crossover and everything.
Even better, if the exchange rate is a horror (or does Romania have the €?):
If available, have a look at Monacor. Cheaper and really really good, and the plans they offer for free will make you smile.

Greetings,

Pit

[chris661]

Hi

You can simulate the response of Visaton drivers using BoxSim. The program itself is all in German, but here's a walkthrough in English. BoxSim
It's a pretty powerful piece of software - it will simulate things like baffle step, passive crossovers, off-axis frequency response, polar plots etc.

Chris

[Helmuth]

I have a great tip monacor spa30a, meets perfect your requirements.
MONACOR INTERNATIONAL:Product detail page

Here with simulation and reflex port dimensions. 75L so that means a box of 60liter with stuffing.

Great alu frame and bottom price super price performance.



Mid frequency. 93dB.
Dayton RS 52


or morel EM1308


tweeter morel et448


monacor dt28


monacor dt-25ti



succes

[Helmuth]

Papercone mid MSH115 monacor. low distorsion flat response. Medium price.

And the super measurements of the monacor dt25ti.
Monacor - Romania

[Helmuth]

And try a 1st order series filter phase correct.

[cosmindaniel12]

Thank you Chris, I already played a bit with the BoxSim, and it really seems a very good and powerful program. It also simulates the difraction and several other stuff...
The only thing that worries me a bit about Visaton drivers is that they look... I don't know, cheaper and more fragile than, let's say, Silver Flute or several Vifa or Peerless drivers, not to mention SB Acoustics. I'm talking about the stamped chassis (vs cast chassis for the others) and the aluminium VC. I know that cooper in the speaker's motor helps a lot with the distortions...
Helmuth... an impresive amount of suggestions! I must say I love the idea of a 1st order series crossover, I was also thinking about it, or a 1st order series everywhere, and second or third order for the tweeter only, if I have to cross it low...
The problem is that I really don't know anything about Monacor, I haven't heard of them or of any great project with their drivers...
Also, the monacor spa30a is a PA high sensitivity driver, with great efficiency over 100-150 Hz, but like any other pro driver, poor efficiency down to 40-50 Hz. I'm looking for home drivers, with good efficiency from 40 Hz up to 350-500 Hz.

[Flaesh]

Originally Posted by cosmindaniel12

like any other pro driver, poor efficiency down to 40-50 Hz..

it does not matter - home or pro. high sensitivity (read - low Q) driver have (in the limit) 6db\oct slope at LF

[arjank]

Most PA drivers have indeed the highest efficiency in the mid/bass band. But, if you want a driver that doesn't need a large cabinet, has good efficiency and can take some power then you should also take a look at this one 10B200

Oberton makes great loudspeakers for a reasonable price. I have two 10b200's at home and they have a stunning bass performance down to 40hz in a 35 liter bassreflex enclosure (tuning between 40 and 50hz).

[Helmuth]

Originally Posted by Flaesh

it does not matter - home or pro. high sensitivity (read - low Q) driver have (in the limit) 6db\oct slope at LF

Precise it doesn't matter I simulated a lot of drivers. And when the same volume spl and frequency response come together. In simulation they all become the same.

I began with visaton drivers 20 years ago last project I used monacor woofer real good result nice tone dynamic bas and good subbas.
I have to say I am fully satisfied although there is one point they have problems with manufacturing consistency IMO.
If you do not won't a pro driver(they have often better thd figures).

I know a other nice driver from monacor polypropylene cone.
sph-300ct only connect one coil to have 8ohm.





Good suggestion that oberton chassis. Amazing price for such a cool chassis.