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<blockquote data-quote="Peter Morris" data-source="post: 212593" data-attributes="member: 652">If you turn the box sideway with the two 12&quot; or 10&quot; drivers either side of the horn, and cross to the BMS 4594/HF950 horn at around 630Hz the pattern at this point will collapse (as a best guess) to round 40 - 50 degrees. This is why the double 10 like Jaroslav&#039;s design looks great, it controls the vertical pattern of the 10&quot; drivers to match the horn&#039;s nominal vertical pattern of 50 degrees at the crossover point.@ Jaroslav ... that gain you get around 300Hz and EQ-ed out will actually translate more SPL <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />Below (excuse the cat) is a box I built which is some what similar to yours (its on its side in the picture). The 2 slots and chamber in front of the 2 x 14&quot; drivers produces a peak around 400Hz which is EQ-ed out. The spacing of the slots either side of the horn form a dipole and hence control LF directivity. If you get it correct (the spacing and crossover frequency/slope) you can get an almost perfect off axis frequency response through the crossover point in both the horizontal and vertical plane.[ATTACH=full]208912[/ATTACH]</blockquote>

[QUOTE="Peter Morris, post: 212593, member: 652"] If you turn the box sideway with the two 12" or 10" drivers either side of the horn, and cross to the BMS 4594/HF950 horn at around 630Hz the pattern at this point will collapse (as a best guess) to round 40 - 50 degrees. This is why the double 10 like Jaroslav's design looks great, it controls the vertical pattern of the 10" drivers to match the horn's nominal vertical pattern of 50 degrees at the crossover point. @ Jaroslav ... that gain you get around 300Hz and EQ-ed out will actually translate more SPL :) Below (excuse the cat) is a box I built which is some what similar to yours (its on its side in the picture). The 2 slots and chamber in front of the 2 x 14" drivers produces a peak around 400Hz which is EQ-ed out. The spacing of the slots either side of the horn form a dipole and hence control LF directivity. If you get it correct (the spacing and crossover frequency/slope) you can get an almost perfect off axis frequency response through the crossover point in both the horizontal and vertical plane. [ATTACH type="full" alt="IMG_1581.JPG"]208912[/ATTACH] [/QUOTE]

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