Views Read Edit View history. Conversely, the MT or TM combination's on-axis plane is not coincident with the physical on-axis plane - it is tilted w. Jesper's cabs have here been transformed into a more compact looking standmount speaker. Speakers during crossover development. With this, for listening distances much greater than the distance between the drivers the lobing effects are much less obvious. The above image shows the lobing pattern of a typical TM loudspeaker.
The midwoofer-tweeter-midwoofer loudspeaker configuration (called MTM, for short) was created by Joseph D'Appolito as a way of correcting the inherent lobe. One of the most important speaker building projects published by audioXpress, THOR was designed by Joseph (Joe) D'Appolito, who is world-renowned for his pioneering work on MTM-based (mid-tweeter-mid) loudspeaker configurations.
The original THOR transmission-line design was. The D'Appolito design, more commonly referred to as MTM configuration in the DIY world (mid-tweeter-mid) has withstood the test of time and.
LspCAD simulation of crossover and predicted response. The lower one-third of the cabinet had been sealed off to make an upper compartment of 22 liters - and to make a long story short, I don't think I've heard the W15 drivers better than from this cabinet.
As can be seen, the lobe tilts downwards towards P' which is not the same as the on-axis listening position P. As a result, the off-axis response i.
This page was last edited on 10 Aprilat The cabs are 32 cm deep and maybe the expansion towards rear panels has something to do with the absorption of the energy coming from the rear of the drivers. Download all kit sales presentations here.
Video: D appolito ����� � ������ The D'Appolito Design at Audio Video Design
Joseph D'Appolito has a speaker arrangement named after him, a vertical array of mid-Woofer, Tweeter. A loudspeaker configuration developed by and named for Joe D'Appolito, in which a high frequency driver, or tweeter, is positioned between.
Doing the Ellam and Ellam XT speakers, the idea of making a d'Appolito construction obviously came to mind. The Ellam25, 2½-way, came first and for.
Experiment with series resistor R for best tweeter balance. One thing is the laminated side panels made from 6 x 5 mm laminated plywood of various density.
There will, however, be some off-axis listening position where the acoustic sum is ideal - but the listening position itself may be such that it is not practical. The only other difference is the lobe tilt which is exactly the opposite of the MT configuration. Since it is rare for a tweeter and mid-range or woofer to have their diaphragms or acoustic centers in the same physical plane, it follows that sound waves emitted by them of the same frequency will not reach a particular listening position in the on-axis plane at the same time.