Hello,
This website came up while doing a search on this project and I would like to hear from members that can pass along some recommendations or suggestions. Having always enjoyed the high efficiency and horn loaded speakers from the 1970's, I'm looking to build a modified Altec Model 19 speaker.
As great as the Model 19 cabinet looks, the double bin configuration would be more of a challenge to build, the foot print larger than I would like and the 811b horn is positioned lower than I prefer. The Altec 620 enclosure, with the recommended slightly smaller port for a 416 woofer (vs. the typical 604 speaker used in it) to serve as the bass cabinet would provide the right internal volume and give the height I'd prefer to set the 811b on top.
Any comments on using the 620 with Model 19 components would be appreciated.
Alternatives to the HF components I have read favorable comments on include the BMS 4550 compression driver used either on the 811b or SEOS-15 wave guide. If any one has experience with those or has some used ones they are interested in selling, please let me know.
The speakers would be driven by a modified Dynaco ST70 for that familiar and favorite tube sound.
I look forward to any help or comments.