Monacor SPA-10PA

[Picarro]

Hi guys

Can the above Monacor model be used for a subwoofer? I have two of them lying around after a mis-buy and I was contemplating building a slim under-bed subwoofer. It will mainly be used for films so the bass doesn't have to be very loud or overwhelming. I just need it to be felt a little when sitting in the couch. It would be a good DIY project for me.

Here is a link to the specs:

SPA-10PA

[TheBaronGroog]

Hi, you can use it as a subwoofer, however even in a 2CF ported enlosure the F3 won't be much above 43Hz. Have tried tuning lower but response drops off. Make the box bigger and you can bring the tuning down while keeping a relatively flat reponse-what volume could you go to?

[Picarro]

The limiting factor is the height which has to be around 20 cm's. It has to be placed under a bed which gives it 28 cm's of clearance and I would like to place it on some feet so it doesn't have to rest directly on my concrete floor.

The box could probably be 100x150x22 cm's in outer dimensions if I can stretch it.

One of my main issues is that my room is in the basement which leaves me with concrete on 5 sides and a wooden ceiling. I don't require very low bass because that would just leave me with a lot of rumble and resonance and not much actual bass. I'd much rather go for precision at a bit higher frequencies.

Edit: My previous sub is/was a Cerwin Vega LW-12X which creates way too much rumble and not enough "punch".

Edit2: I have two of these drivers, so if they can be mounted in any way to create more SPL be my guest as to enlighten me. I have build Saturnus' Boominator, where the drivers are mounted back to back which increases their respective dB levels. Could something similar be done here to achieve MOAR BASS or well, more "punch".

[epa]

maybe a th or tqwtp.
maybe bjorno can help you
.

[Picarro]

Originally Posted by epa

maybe a th or tqwtp.
maybe bjorno can help you
.

I saw it. I recognized technobabble. My head went . Can you elaborate a little bit for me?

[bjorno]

Originally Posted by Picarro

I saw it. I recognized technobabble. My head went . Can you elaborate a little bit for me?

Hi,

epa is right: Here is a suggestion:

b

[Picarro]

Okay, so with a horn design I could get it to have an SPL of 108 watts at 37 hertz? And the enclosure would need to have a volume of 78 liters. How about the design of the horn? I have seen some horn designs before, but I am unsure as to the angles I would have to use and so forth.

[bjorno]

Picarro: ..Okay, so with a horn design I could get it to have an SPL of 108 watts at 37 hertz?..

I don't know if a horn would achieve the numbers you've posted but a T-TQWT,definitively not a horn, would do this in a single folded enclosure.

.. How about the design of the horn? I have seen some, but I am unsure as to the angles I would have to use and so forth..

I've seen some too..thousands during at least 45 years..With various angles...

IMO, You're too quick and vague..(so forth)....

b

[Picarro]

Originally Posted by bjorno

I don't know if a horn would achieve the numbers you've posted but a T-TQWT,definitively not a horn, would do this in a single folded enclosure.




I've seen some too..thousands during at least 45 years..With various angles...

IMO, You're too quick and vague..(so forth)....

b

Okay.. I will try to rephrase. I Googled your username and the term "TH" and I found a link about horns - therefore I assumed it was a horn you wanted me to build. I have no idea what a T-TQWT is, but I will Google it.

[TheBaronGroog]

Picarro, welcome to the wonderful world of quarter wave-I found it and am still trying to get my head round it-even working out what design is a horn, T-TQWT etc.

Bjorno, however, seems to know them inside out and can do what would take me a month in hornresp in a few minutes! I was still playing with hornresp and he's already got a nice model back for you! Follow his advice-follow mine and it's like the blind leading the near-sighted