Seas Idunn kit

[DIFORCE]

anyone built \ Heard it ? Any thoughts ?

[ZilchLab]

Have the DXTs, but have not built with them. Heard DIY by another and liked it, "Best of Show" at a recent meet.

Operating via compound diffraction, in theory, they should be HOM City, but nobody can hear it, apparently....

[urkain87]

Hi, I have the Idunn-kit. I can really recommend it, very good off and on axis response. Mabe lacking a bit in the bass, but they roll off so slow they still go very deep.

Here is a link too my build:
AVforum.no - SEAS Idunn bygge"logg"

Its in Norwegian, but the pictures explain alot

I did an inn-room measurement at my listening position with a denon calibration mic.

Dissregard the worst bumps and dips as they are room and position dependent, but you get the idea. Blue line is with subwoofer.

[DIFORCE]

Doesn't seem like it's lacking in the bass

[hasaudio.co.nz]

DIFORCE. Its a very nice Speaker. The Seas U18RNX/P I think produces very nice bass for its size. Controlled and smooth with plenty of backing.

"The Seas Idunn is one of my favorite loudspeakers, and they have been anchored in my living room for a long time now. It has a very neutral and detailed sound, but is still lively enough to get your foot tapping and listen to music for hours. Although, what really separates the Idunn from other speakers, is the controlled wide dispersion. This makes it sound good even outside the sweet spot, when I’m lying in the sofa reading a book, or jumping around the living room."

Håvard Sollien, SEAS R&D Manager

Cheers

Cameron
Hasaudio

[critofur]

Originally Posted by urkain87

...I did an inn-room measurement at my listening position with a denon calibration mic.

The classic ~ 200 Hz (in this case, exactly 200 Hz) "FBC" [Floor Bounce Cancellation] that you find with any "bookshelf" speaker.

Filling in that big dip at 200 Hz with additional woofer(s) located physically lower really improves the sound IMO.

But, that problem is not particular to the Idunn, it's what you'll see with ANY speaker design lacking low (location, not Hz) woofers.

[RockLeeEV]

Originally Posted by critofur

The classic ~ 200 Hz (in this case, exactly 200 Hz) "FBC" [Floor Bounce Cancellation] that you find with any "bookshelf" speaker.

Filling in that big dip at 200 Hz with additional woofer(s) located physically lower really improves the sound IMO.

But, that problem is not particular to the Idunn, it's what you'll see with ANY speaker design lacking low (location, not Hz) woofers.

As far as I can tell, this "problem" is not particular to any loudspeaker. For example, a male vocalist 10 feet away from me, in my room, would have the same "floor bounce cancellation". Do we give him an additional mouth located phyiscally lower?

[SY]

Haven't heard them yet, but one of the best speaker designers I know bought a pair for himself.

[samadhi]

Originally Posted by RockLeeEV

As far as I can tell, this "problem" is not particular to any loudspeaker. For example, a male vocalist 10 feet away from me, in my room, would have the same "floor bounce cancellation". Do we give him an additional mouth located phyiscally lower?

Interesting point. But what about a drumkit that is usually poistioned on a floor, or an upright bass etc? I guess it depends on the recorded position of the instrument and how it correlates with the woofer location in your room.

To keep things kinda on topic I have a similar design (DXT + ER18) and I like it.

[critofur]

Originally Posted by RockLeeEV

As far as I can tell, this "problem" is not particular to any loudspeaker. For example, a male vocalist 10 feet away from me, in my room, would have the same "floor bounce cancellation". Do we give him an additional mouth located phyiscally lower?

It IS a problem and it is particular to any speakers which do not have woofers located in a relatively low position which play up to at least 200 Hz.

As others have pointed out - does the drum set, the guitar, or, a whole orchestra come out of his mouth? NO.

A deep null at ~ 200 Hz, which is introduced by the speakers, affects ALL the sound sources being played back. Also, a singer who is standing is generally not the same height as the woofer on a "TM" stand mounted speaker, and, the distance that one is from an acoustic singer at a live performance is also usually not the same as the typical distance from speakers at one's listening position when seated at home.

Having both speakers both the same height, and, the same distance from your listening chair exacerbates the problem.

Having two woofers per speaker would at least somewhat, if not substantially, ameliorate the problem.

If I had 4 of the Seas U18RNX/P woofers I would most certainly try to build a TMM tower equivalent of the "Idunn" speaker, partially because of the FBC issue.

Regardless, I would certainly like to hear both the Idunn and the ER18DXT (preferably one after the other in the same room so that I could compare them).

Originally Posted by samadhi

Interesting point. But what about a drumkit that is usually poistioned on a floor, or an upright bass etc? I guess it depends on the recorded position of the instrument and how it correlates with the woofer location in your room.

To keep things kinda on topic I have a similar design (DXT + ER18) and I like it.

Yes of course - with the upright bass there is a large area - the strings and the entire instrument body which radiate sound.

I do not generally hear a problem with tower speaker designs (such as the Revel Salon Ultima) in regards to the lower woofers making it sound as if a male vocalist has additional mouths at a lower location. I have, conversely, participated in listening experiments where the FBC was filled in and everyone participating agreed there was an audible and clear improvement...