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Old 27th November 2012, 06:11 PM   #271
Kraniet is offline Kraniet  Sweden
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Quote:
Originally Posted by Joachim Gerhard View Post
The drivers i have certainly are made very well. Building quality is very high and they measure very good.
I saw the Guru speakers at Klangbilder in Vienna.
The straight edge may work because the tweeter has a waveguide.
Yes, i am waiting for cabinets from SB but i will also make some hand samples that are simplified. I simply was too busy, 3 shows in 4 Weeks.
I have no experience with Motus drivers. I see them here for the first time.
The designer for Guru (Ingvar Öhman) doesnt believe in easy answers and he designs loudspekers with all parts harmonizing together. The drivers are custom built with custom materials, glues etc all after his head. So theres probably more than one reason for him having a straight step. Although he have advised on other occasions that a straight shelf is better. Something to do with how the sound is projected. Hes all about psychoacoustics, having spent most of his life researching the field. Actually the original speaker pi60 (that the qm60 is a variant of) was developed as an psychoacoustically neutral monitor for the research.

Regarding the Satori I became very interested when I first heard of the SCAR-drivers. With the long wait they seem to have changed some aspects. It sure seems like a nice driver, and compared to Scan-Speak Illuminator they are cheap (!). I wonder how they hold up against Illuminator and Vifa NE drivers.
Its a pity the response could be made more flat. Id glady sacrifise some of the high extension for a flatter curve. It is nice though that they dont have any sharp peaks in the 5-7kHz area.
A driver with the satori motor and a cone similar to Raidho ceramic cone would be nice if it could be had for the same price. A special mix composite cone could also be interesting, but i guess it against their "policy" of high QMS

The Motus drivers are quite new. think I first saw an ad on them in last month Voice Coil.
As gornir says, this month issue had a tweeter for review. Seems to be good quality products. The price is pretty low for a underhung driver with controlled response.

My latest build is using the Wavecor wf182bd04 wich also are very nice and affordable. Id rate them a bit higher than SB normal range and even on par with SS Revelator. They to, however, suffer from an uneven breakup. I think a sharp peak higher in frequency might be easier to handle than an uneven breakup with several peaks in the 4-5kHz area.

WF182BD03_04

Arent Audio Physic using wavecor drivers to some extent?

Anyway this might be going off-topic.
I look forward to see the result of your project.
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Old 28th November 2012, 02:08 AM   #272
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Quote:
Originally Posted by Kraniet View Post
The distortion under 100Hz seems rather high on the 8" woofer
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Old 1st December 2012, 04:55 AM   #273
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These are somewhat similar of what i try to do. This would be the phase linear variant but i will also make a L/R4 crossover design for comparison.Earthworks Sigma 6.2 loudspeaker | Stereophile.com
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Old 1st December 2012, 06:32 AM   #274
_henry_ is offline _henry_  Australia
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i think its ugly
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Old 1st December 2012, 05:14 PM   #275
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Yes, they are but the principle works.
This guy build the same speaker with a first order crossover and an L/R4 and could not hear a difference :
Crossover demos
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Old 3rd December 2012, 09:05 AM   #276
Kraniet is offline Kraniet  Sweden
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as for the design Iwe always had a thing for Sonus Faber Extrema.

Click the image to open in full size.

Also Id favor a design that allows for placement ner the wall.
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Old 4th December 2012, 02:23 PM   #277
Speak is offline Speak  Sweden
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Default ABX test

I will say AB test don't work. You just listening differences not what/how it sound like. Specially if the frequency response are similar. Try AB test on cable.

Nice to read what's mind on other speaker designer.
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Old 4th December 2012, 02:27 PM   #278
Speak is offline Speak  Sweden
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Nice to read what's in mind on other speaker designer.
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Old 4th December 2012, 03:16 PM   #279
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I will make my own auditioning if fist order or 4th order works best.
I know it is not that simple.
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Old 20th December 2012, 02:06 PM   #280
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I am building the DIY version of the cabinets for the Satori Monitors. In the meantime the professionally made cabinets are build by SB. We still have not decided if we will offer this cabinets ready made or as a flat pack.
Anyway, here i show you how to build cabinets for the Satori Monitor with minimum effort.
We decided before on a Guru clone for the shape of the cabinet.
I am building it in 19mm chipboard. That is cheap and easy to work with. Some say that it also sounds better then MDF. I think it is not worse.
The dimensions are a bit unusual but not unattractive. They are 30cm wide, 40cm high and 22,5cm deep. There is also a 32mm thick baffle made from 2 x 16mm chipboard
to time align the drivers. I will round the edges and will look if the sharp edge from the woofer baffle to the tweeter has any bad effect. The wider then usual baffle has the advantage that the baffle step is not that pronounced so we win some efficiency in the fundamental tone area. The tweeter on the wider baffle will push the edge reflexion to lower frequencies. Would be ideal if i can place the crossover point in such a way that the edge reflexion suck out is in the region where the crossover already rolls off the tweeter. The front baffle is mechanically quite stable because of the extra baffle for time alignment. That way 2/3rd of the baffle is 51mm think. The side and top walls are not very deep, that also helps to make them stiffer then usual. The biggest unbraced wall is now the back wall so i decided to glue on a ceramic tile.
Attached Images
File Type: jpg smsb 1.jpg (550.3 KB, 847 views)
File Type: jpg smsb2.jpg (529.5 KB, 813 views)
File Type: jpg smab3.jpg (502.8 KB, 779 views)
File Type: jpg smsb4.jpg (557.3 KB, 764 views)
File Type: jpg smsb5.jpg (426.8 KB, 171 views)
File Type: jpg smsb6.jpg (583.9 KB, 237 views)

Last edited by Joachim Gerhard; 20th December 2012 at 02:34 PM.
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