Bastani Prometheus w/dipole sub - diyAudio
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Old 9th December 2005, 12:24 PM   #1
icebear is offline icebear  Norway
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Default Bastani Prometheus w/dipole sub

Here are some pictures of my latest project.

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To see the buildingprocess se HERE

The sound is VERY nice.

The subs are active trough a behringer DCX. The top is fullrange trough a tiny EL84 tubeamp.

Cheers
Bjorn
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Old 9th December 2005, 12:39 PM   #2
Nuuk is offline Nuuk  United Kingdom
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That's first-class work icebear! And it's the direction that I am heading in as well (with my Goodmans 201 baffles).

What drivers have you used for the woofer section and how much EQ have you used?
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Old 9th December 2005, 12:47 PM   #3
icebear is offline icebear  Norway
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Thanks Nuuk

It's the Peerless SW315. They are connected in parallell. To increase the Qts I have connected a 2 ohm resistor in series. Actually I have disabled the eq. Not really needed at this point. But I live in a concrete flat, and the bass can get quite exaggerated if there is too much level. So I just fill in the good signature of the prometheus. In another room maybee more eq is needed.

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b
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Old 9th December 2005, 12:49 PM   #4
icebear is offline icebear  Norway
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It's quite spacesaving to have the subs integrated in the baffle. I have lived with seperated subs for some time. It takes a lot of floorspace in the livingroom. :-)

b
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Old 9th December 2005, 12:53 PM   #5
Nuuk is offline Nuuk  United Kingdom
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Well I have always thought that the Prometheus deserved dipole bass and your design fits in so well with the main baffle!

I like my TL woofers but they are so large and I am growing tired of having to lean over them to reach my CD rack. So you have rekindled my desire to do something very similar!
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Old 9th December 2005, 03:36 PM   #6
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WOW!

Very nice!
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Old 9th December 2005, 05:19 PM   #7
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Very cool!

I looked for the SW315 on the peerless (tymphany) website and could not find it. The closest I could find was the 315 SWR (831857). Is that it?

Also, do I understand you to be saying you aren't using any eq? Are you doing anything to integrate the subs to the mains?

I'd like to build a dipole using the CSS FR125S and a woofer, but I figured I'd need to go active to do the crossover (which I can't afford at the moment ).

Thanks.

Paul Ebert
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Old 9th December 2005, 06:35 PM   #8
icebear is offline icebear  Norway
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Thanks for the kind words.

Paul
It's the SWR yes. Did not remember the last letter :-)
I am using the Behringer dcx2496. It's a digital 3 way crossover. I could apply eq if I want. It's a feature in the crossover. I have tried, and used it for a while, but for the moment it's turned off. The resistor in series increases the Qts, which is a natural EQ for the elements. I would recommend that you try EQ if you build a pair. If I move to a larger room, or a room with wooden walls, I most certanly would apply EQ.
Now I integrate the sub by trying out different X-over freq. and levels.
The woofers com in at 82 hz/ 48 dB. The prometheus goes fullrange, no filter, bur rolls of around 80 hz.

If you go for any speaker with seperate woofer, I would recommend a separat amp yes. Active setups have advantages there.

Cheers
Bjorn
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Old 10th December 2005, 01:55 AM   #9
dmason is offline dmason  United States
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Bjorn

Very, very nice. Dipole bass is Where It's At with open baflfe systems, no doubt. I was wondering which EL84 amp you are using. One thing I love about high sensitivity wide rangers is that they can extract unreal sonics out of a couple of sweet SE watts. Right now I am using the Bottlehead SEX amp, and a Korneff 45 for my Visaton OB.
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Old 10th December 2005, 07:32 AM   #10
icebear is offline icebear  Norway
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Hi dmason

I'm using a clone of the Decware SE84SC. (www.decware.com)
It's a nice 2w amp.
I also have e modified T-amp. It's good but does not have the tone of the tubeamp.
But you can throw any amp at the speaker, and it will play decent. Probably cause the speaker does not load the amp much.

cheers
b
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