Altec 604 D Enclosures

[charly1944]

Il y a de quoi,Panomaniac,
Let me know wether we should go on in French!Actually,your suggestion to go for an MLTL solution guided by GM after measuring my speakers is probably the more reasonable one.But it implies that i equip myself with measuring devices (an adapted mike and a sound card i guess), that i learn how to properly use them, and that when the measures are done, GM agrees to help me and has enough time to guide me in the design and the buiding process.He will tell me wether this is the case but i understand he his pretty busy with his house .So all that may take time.
Meanwhile i am tempted to try to improve my friend's enclosures by two combined approaches:
1. Reduce the size of the present rectangular opening empirically, the way Altec Best recommended ,and test the impact on the performance,simply by listening.This will be done on monday on my friend's speakers.
2.If that works,Change then the dimensions of the enclosures while keeping the same internal volume in order to get the height of the speaker more in line with my ear level .So increase the height of the boxes and reduce the width and the depth accordingly.My challenge here is to select a good a ratio to reduce resonances and minimize damping.They are many golden/desirable ratios published and i have no clue wether some have proven better than others.Help is welcome.
This will cost me around 400 USD and allow me to listen to music while preparing the MLTL solution if i am not totally happy with what i have.
Any thoughts,monsieur ?