Next speaker choice: FHXL, Silbury, Blanda+Grönsaker, then?

[zintolo]

Hi,

I've built a pair of Frugel Horn XL with A11MS, a pair of Silbury with MArk Audio A10.3, and I will start building a pair of Blanda+Grönsaker with A7ms (these last will probably be paired with a sub).

I have to say that I really like the FHXL and I'm in love with the Silbury so much that I'm thinking to sell my Klipsch RF82.
So my question is: what do you think I could explore as next build?

Thanks,
Roberto

 

[von Ah]

Tysen V2!

 

[planet10]

The W14 woofers are really hard to get in Europe.

dave

 

[zintolo]

Can a Blanda + Grönsaker + Tysen2 (with the push-push configuration) be a solution? Aestetically seems a very good match.

I've tilted 5° backwards the front and back panels, 30° the top. Mid-lows speakers placement needs for sure improvements, as well as cabinet dimensions.
The distance between the center of the speakers is 360 mm, so I need to crossover below 240 Hz, but the Blanda + Grönsaker can go down to 70 Hz, so there's a huge range of possibilities.

 

[planet10]

Get the Ikea bits as close to the woofers as possible, even maybe add a notch on the top for top to dit down into.

dave

 

[zintolo]

Thanks Dave!

Something like the B&W 800 series.

I could do the notch on 3D, print it and then cut the top following the printed shape. Otherwise my friend has a small CNC, it can be done better there if it fits.

Can I ask to you or Scott to have a Teams/Skype introduction to speaker design on available softwares?

I always liked to build my own things, and I don’t like to build without knowing why I’m doing things.

 

[zintolo]

Inverting the sloped top I'm able to reach 270 mm speaker to speaker, but I don't know it the placement of the two push-push speakers is optimal or not in the lower cabinet.

 

[von Ah]

Cool! Here’s a wild idea. Though you would lose the push-push benefits of Dave’s design, the two bass drivers firing up into the globe might be interesting.

 

[zintolo]

I see some issues with that:

• you will loose the mechanical-forces canceling-effect you get by two coaxial push-push speakers;
• you will have no more space for a support for the Blanda+Grönsaker;
• possible interferences with high pressures where part of the Blanda+Grönsaker venting "breathes".

@planet10 , @Scottmoose , @GM what do you think?

 

[planet10]

Inverting the sloped top I'm able to reach 270 mm speaker to speaker, \

You cannot move the vertical position of the bass drivers. Z_d is critical to the design.

This is the line that is the basis of the woofer part of Tysen V2

https://frugal-phile.com/boxlib/SF-W14-ML-TL-191213.pdf

dave

 

[GM]

Hmm, at a glance, will just point out that the globe will have an acoustic sphere of 0.61r, so acoustically if 20" dia = 10*0.61 = 6.1+20 = 26.1" acoustical diameter for max calculating ctc, etc..

 

[zintolo]

You cannot move the vertical position of the bass drivers. Z_d is critical to the design.

Thanks Dave, so I have to stick on this design you posted here: https://www.diyaudio.com/community/...s-does-it-get-any-better.364188/#post-6443036 and hope to find four Silver Flute W14rc25 in europe...

Can I horizontally mirror the top slope keeping the same height at the bracing point?
So fron higher then rear?

 

[zintolo]

the globe will have an acoustic sphere of 0.61r, so acoustically if 20" dia = 10*0.61 = 6.1+20 = 26.1" acoustical diameter for max calculating ctc

Thanks GM! The globe has a diameter of 28 cm, as I'm using the big Blanda+Grönsaker.

 

[planet10]

four Silver Flute W14rc25

Good luck, they are, AFAIK, a Madisound house brand.

I shipped 4 to Scott in the UK,mi still have some.

dave

 

[zintolo]

Will they fit well with the Alpair 7MS?
I see the sensitivity of the Alpair is 86 dB/Wm, while the two SF should have 93 dB together.

Do you suggest to biamp (class D for lows, tube SE for highs) with two SF 8 Ohm paralleled, or a single amplification with two SF 4 Ohm in series?

 

[planet10]

Biamp yes. Then you don’t have to worry about sensitivity.

The W14 comes in 3 different impedances and with 2 you have some measure of being able to jusge sensitivity

2 4Ω in parallel worked right with the 3”ers.

dave

 

[chrisb]

I thought it was only two impedances - 4 & 8? Did you or Scott ever model anything with the 8” woofers? Those are still pretty danged affordable.

 

[planet10]

4, 8, 16Ω for thw W14, at least when i was working on Tysen V2.

I have looked at the 6.5 and 8, i wasn’t excited, i think maybe Scott had a look at the 8”.

I did send him a semi-random set of 4 (modPodged) W14s and his T/S showe dthem almost identical.

dave

 

[zintolo]

Biamp yes. Then you don’t have to worry about sensitivity.

Thanks Dave,

I’ll go 8 Ohm bevause I like TPA3116 and on 8 Ohm will give a reasonable power.

Is there any difference going with two SF 4 Ohm un series or two SF 16 Ohm in parallel?

 

[planet10]

I didn’t really look at that. It, in theory the passive should work with 2x16Ω in parallel, but…

If you are biamping, whichever makes th emost sense for your amplifier. 2 x W14, couold be 2/4/8/16/32Ω (latter would be good for an OTL)

dave