Is it possible to cover the whole spectrum, high SPL, low distortion with a 2-way?

Thanks guys, but the thread is the fruit of shared commitment and common interest in loudspeaker technology,
based on open source contributions to non-formalised 'knowledge transfer' :clown:


An interesting short article on manifolded compression drivers.


VOL37_Dec09_ManifoldedDrivers_DualDrivers.jpg
 
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I initially thought GM was a forum moderator ��

Beyma response curves are some of the most true to life representations I’ve come across. I was able to find community taken measurements to confirm that, I don’t think I can say the same for a lot of other big names.


GM is the brains behind this thread 😉

Beyma specifications and curves are indeed very reliable.
Differences between individual and factory measurements can be rooted in a number of causes, of which the horn used is just one.
 
do it... mono!

Is there much merit in MTM design when dealing bass channels running 15" woofers for a domestic relatively low level listening environment?

The reason I like the really high efficiency setups are because even at low volumes, can hear all the details/dynamics still come through.

Thinking of chopping my beyma towers in half so I can play with 2 speaker setups. 1 with 1x 15" woofer + 1x 12" beyma coaxial. Other with 1x 15" woofer + horn/waveguided hf CD.
 
My system has around 95db sensitivity (after BSC), which is plenty even for low power amps.
For SET amps and the like you'd want more, also when you want the highest output at the lowest (thermal) compression,
but in general you won't miss much if you cut the cabs in half.
 
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Obviously, dispersion and interaction with the room will change if you go from MTM to TM.
If possible, it's recommended to bring coax and woofer, but especially horn and woofer closer together.
The latter seems easy, because you'll have to cut a hole anyway, unless you want to put the horn on top (in a separate enclosure).
 
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Finished the French thread. The guy had some communication with Faital about measured distortion, which was probably caused by a faulty unit.

Despite better measurement results and less EQ needed with the Beyma CP-755Ti, he preferred the sound of the HF144.

01_faital-hf144-16ohms_18sounds-xr1496_1m_indoor_4v_4.2ms-gating_6-eq_no-filter_distorsions.png
 
Audio Elite did you take a peek into the hornthroat and at the drivers, specifically the coating of the cone and the dustcap?

This could be the woofer:
 

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If the comp. driver would indeed be a SICA unit, which makes sense given the profile of Zingli's Omni-ray horn, the phase plug would look like this (provided there isn't any protective foam, or felt in front of it):
 

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