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Delta Audio XL-02 Towers

A high-power 2-way system that you build from a kit

By Leo Simpson. Design by Michael Gayler

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Tower speakers are certainly popular and they have a number of advantages in today’s homes and home units.

Because of their slim design, they occupy little floor space and even though they are tall, they do not dominate smaller rooms. And because of their height, their drivers are at about ear level for most people when they are seated.

Click for larger image
This side view of the Morel MW168H midrange/woofer clearly shows the very large blue aluminium voice coil former. That and the rugged suspension assure very high power handling. The woofer itself might look a bit small but it is a standard 6-inch driver; we should not have used such a big hand to hold it!

These tower models from Delta Loudspeakers each employ two 6.5-inch drivers to handle the bass and midrange while the 28mm dome tweeter handles frequencies above 3.5kHz.

The tweeter is mounted between the two midrange/bass drivers in the so-called D’Appolito configuration, often used in tower speakers, and reputed to give improved stereo imaging for seated listeners.

Both the woofers and tweeter are sourced from the Israeli manufacturer Morel. The woofers are Morel MW168H drivers with huge voice coils – no less than 73mm in diameter – and with aluminium formers, giving a quoted peak power handling spec of 1000W for a 10ms tone burst.

The woofers are also magnetically shielded, by virtue of their double magnets and speaker basket construction.

The tweeter is a soft dome combined with a shallow horn and the voice coil is ferro-fluid cooled for high power operation. In fact the tweeter has a nominal power rating of 200W (for high frequencies). Note that the tweeter is not magnetically shielded.

Specifications
Frequency response 38kHz to 18kHz within ±2.2dB
(1/3 octave smoothed)
Nominal impedance 7.5W (see impedance curve)
Sensitivity 93dB/1W @1m
Power handling 200W
Crossover frequency 3.5kHz
Crossover slope 6dB/octave
Dimensions 212 x 1235 x 215mm
(not including 260mm square base)
Weight 39.5kg each

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