Synergy build with TF0410MR mids

[bwaslo]

Looks pretty nice. Yeah, as Patrick has pointed out previously, the midrange isn't likely to be the weakest link in these things in terms of producing output level. Even one mid is enough in a home.

 

[birkinshawc]

Plot looking better after changing phase on some drivers and adding a little EQ. Still measured inside though.

Top end response was improved by using the correct mic calibration file! ;-)

X-overs are at 330Hz and 1kHz now.

 

[birkinshawc]

Painted and in position. Paint job is not fantastic but it will do for now. The sound is really incredible which is the main thing!

 

[tmuikku]

Nice! Good camouflage, I like it. Most speakers are an eye sore

 

[birkinshawc]

Nice! Good camouflage, I like it. Most speakers are an eye sore

Yeah I had to strike a deal to get such large speakers in our living room!

 

[arcgotic]

Wow! Super nice!

What CD do you use?
The 10" is in a sealed or vented box? I don't understand.

 

[birkinshawc]

Wow! Super nice!

What CD do you use?
The 10" is in a sealed or vented box? I don't understand.

B&C DE250. The 10" is horn loaded with a sealed rear chamber in the base of the speaker, firing up in to the main horn. So you can imagine that the 2 horns for the mid/high and bass merge and share the last part together before the mouth.

 

[bwaslo]

Those look pretty nice. Appeals nicely to my form-follows-function tendencies.

 

[birkinshawc]

Those look pretty nice. Appeals nicely to my form-follows-function tendencies.

They actually look a lot better from the back, which is a bit of a shame!

 

[kipman725]

only just saw this after thinking of the same idea and doing some searching, cool to see someone had already done it. I was thinking with a coaxial compression driver the mid ranges could be omitted and it may even be possible to use a more advanced flare design than a conical as the midrange mounting surface is not longer required.

 

[Petrie]

This is gold - thanks guys!

 

[fers]

Ha! This is what I was trying to do in this thread: Increasing loading of midbass in synergy horn


Well I see the basic idea works, but as I can see from your modelling in HornResp, you start to have standing wave near the end of your bandwidth... I was trying to get away with a two-way, so make the approach work up until 1-2kHz. In this case, the midbass entry port needs to be infinitesimally thin to minimize the impedance mismatch and the ensuing standing waves. I am now thinking along the line of Renkus Heinz 1996 unity horn patent? US5526456A



So, on the bandwidth you are using, it is doable.