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Denovo Audio SEOS-12 Waveguide 2/3 Bolt Matte with 1-3/8"-18 TPI Adapter

Brand:|Model: SEOS-12|Part # 300-7070
The Denovo SEOS (Super Elliptical Oblate Spheroid) waveguide emerged from a community research and design effort, to provide good horizontal high frequency coverage for consistent sound anywhere in a room.
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Part # 300-7070
  • Nearly linear horizontal coverage for great off-axis response
  • Reduced vertical coverage for less floor/ceiling bounce and improved imaging
  • Designed for use with compression drivers crossed over at 950 Hz or above
  • 1" throat for use with 2/3-bolt compression drivers or 1-3/8"-18 TPI compression drivers with included adapter

Product Details

Denovo Audio SEOS-12 Waveguide 2/3 Bolt Matte with 1-3/8"-18 TPI Adapter

The SEOS-12™ (Super Elliptical Oblate Spheroid) waveguide, from Denovo, is the end result of a community-based research and design effort to create the optimum waveguide for home audio use. Controlled directivity is realized in the consistant sound on the horizontal plane for seamless sound throughout the room, no matter the seating location. A side benefit is reduced vertical coverage for minimized floor and ceiling bounce.

Traditional horns have a horn "sound" (also referred to as honking) and internal reflections that cancel out certain frequencies or cause distortion. Denovo's SEOS waveguide provides high dynamics and SPL without the honking and added distortion plagued by other horns. Designed to be used with 2/3-bolt 1" compression drivers, but also attaches to standard 1-3/8"-18 TPI compression drivers with the included adapter. Available in matte and gloss finish.

Specifications: • Throat diameter: 1" • Driver mounting: 2/3-bolt and 1-3/8"-18 TPI (with adapter) • Recommended minimum crossover point: 950 Hz • Overall dimensions: 13.2" W x 6.5" H x 3.5" D, Cutout: 12" W x 5" H (oval shape due to screwhole locations).

Product Specifications
  • Mounting Type2-Bolt/3-Bolt
  • Entry / Throat Diameter1"
  • ConstructionABS
Denovo Audio SEOS-12 Waveguide 2/3 Bolt Matte with 1-3/8"-18 TPI Adapter
  • BrandDenovo Audio Inc
  • ModelSEOS-12
  • Part Number300-7070
  • UPC848864003122
  • Product CategoryHorns & Waveguides
  • Unit of MeasureEA
  • Product Rating
    (1 Reviews)
  • Weight2.1 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

View similar products to the Denovo Audio SEOS-12 Waveguide 2/3 Bolt Matte with 1-3/8"-18 TPI Adapter
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Denovo Audio SEOS-12 Waveguide 2/3 Bolt Matte with 1-3/8"-18 TPI Adapter
Denovo Audio SEOS-12 Waveguide 2/3 Bolt Matte with 1-3/8"-18 TPI Adapter is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from An amazing breakthrough in tweeter technology.I bought a pair of SEOS-12s about a month ago along with a couple of Dayton DT250P-8 1" Compression Drivers. The combination has far exceeded all of my expectations. In my opinion five stars is not a high enough rating so my rating is Nine Stars.I had previously used a variety of dome tweeters in the $30 to $60 range along with exotic components in the tweeter crossovers. But I was never satisfied with their sound. And looking at comments on the Zaph Audio site, it seemed that dome tweeters which cost a lot more than $60 test only a little better than the $60 SB29RDCN for example. I also have the usual audiophile aversion to horn tweeters, but wave guides have been getting good press recently from some pretty sane people. The SEOS design has the best looking response curves, so I took the plunge.When the items arrived I quickly assembled them and connected them through a third order high pass crossover at 2400 Hz. I soon discovered that the SEOS-12 and DT250P-8 combination is more than 20db higher in efficiency than the rest of my system. So a series of tweaks to the attenuator pad followed.The first thing I noticed while listening is that the DT250P-8 drivers maintain coherency at extremely low sound levels where all of the dome tweeters that I tried before actually fade out. The sound stage depth and detail I was previously seeking was right there, even without cranking up the loudness. Of course I was suspicious that the SEOS-12 might honk or shout or bleep at higher levels. Negative. Nope. None. At louder levels than I will ever need in my living room, they seamlessly match the dynamics and smoothness of the rest of my system which uses four Peerless HDS drivers per side and a Rythmik sub woofer below 60 Hz. I enjoy a variety of music genres, but I occasionally like to demo my system with an SACD recording of dramatic orchestral music. Now something is wrong if people don't jump.I hesitate to suggest a tweak for these drivers lest I be relegated to the "tin foil hat" bunch. And typically I use normally priced stranded speaker wire made by Canare, Mogami, or Supra. But the SEOS-12 and DT250P-8 combination is so efficient that even the smallest smattering of wiring grunge is evident. This is apparently true of all highly efficient drivers, not just these. So I would pointedly recommend SOLID 24 gauge copper wiring between tweeter crossovers and all high efficiency tweeters. In my experience, solid is much cleaner than stranded FOR THIS APPLICATION. And 24 gauge is big enough for a four foot run from my external crossover box. I use simple solid magnet wire and twist the strands together.In summary, the SEOS-12 and a well-matched compression driver add up to a true Giant Killer. You will probably learn to like their looks. But you may have to hide them in a pair of small cabinets to please your significant other. The SEOS-12 wave guides are very easily worth it.Cheers,Charlie
Date published: 2015-09-10
  • 2016-02-10T06:43CST
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Denovo Audio SEOS-12 Waveguide 2/3 Bolt Matte with 1-3/8"-18 TPI Adapter

The description says that this is to be used with 1" compression drivers, but can this horn be used with a 1" silk dome tweeter? If so, what about the 1 1/8" Dayton DC28F silk dome tweeter? (FYI, I have no issues with drilling new holes in the ABS)

Asked by: paradoxjeff
The throat of the horn would need to be modified and a mounting "platform" would need to be fabricated in order to use this with a silk dome tweeter, but if you are able to make those changes I see no reason why it won't work.
Answered by: MattP
Date published: 2015-04-17

What is the vertical pattern?

Asked by: Lawrence dM
The vertical pattern depends on the frequency the horn is seeing. 40*@ the crossover point and slowly reduced as the frequency goes up. For home audio, everyone in the seated area will be happy if they can look down the throat of the horn. Off axis is a different story though---reflections, standing waves, furniture etc. all change the sound. That's why in recording studios--the monitors are directed at the mixer & operator.
Answered by: Joe from San Francisco
Date published: 2015-05-28

What is the horn made from? Will the Dayton horn driver fit easily?

Asked by: dave251
This horn is made from ABS plastic and yes, it will fit any standard 2 or 3 bolt mount and with the included adapter, it will also work with 1-3/8" threaded drivers.
Answered by: MattP
Date published: 2014-06-28
  • 2016-02-10T07:21CST
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