These drivers have been taken out of a broken down Yamaha YSP900 processor. I had the processor set up in a fairly small TV room and the sound was excellent. When the bar packed in, I put the drivers into a fairly small 2-way sealed box with a simple cross-over and it also sounded good but was lacking the bass. I guessed the woofers must have been designed for a vented box so I took the stuffing out of the box, punched a hole and stuck a short vent in it. The bass improved but even though I tried a few different options with the length of the vent I could not get a balanced result.
Anyway - I have two 4" woofers and 20+ 2" mid-range/tweeters (they might be full rangers).
The inscription on the woofer says:
Yamaha X6947A0 4Ohm 7D08D
The stamp on the 2-incher is:
007-04 4Ohm 25W J47BA
I have done quite some googling and asking around but so far have drawn a blank. Even though the marking on the woofer indicates that it is a Yamaha driver, it could obviously be made by a specialist driver manufacturer.
I have built a few sets but speaker building is a casual hobby for me and I do not have any measuring equipment or software.
I know I am testing my luck but there may be someone who could help identify these drivers or may have even measured them - I believe these drivers were also used in the YSP1100 and possibly other similar Yamaha processors from the mid-00s.
Crossing my fingers.
Adam
Anyway - I have two 4" woofers and 20+ 2" mid-range/tweeters (they might be full rangers).
The inscription on the woofer says:
Yamaha X6947A0 4Ohm 7D08D
The stamp on the 2-incher is:
007-04 4Ohm 25W J47BA
I have done quite some googling and asking around but so far have drawn a blank. Even though the marking on the woofer indicates that it is a Yamaha driver, it could obviously be made by a specialist driver manufacturer.
I have built a few sets but speaker building is a casual hobby for me and I do not have any measuring equipment or software.
I know I am testing my luck but there may be someone who could help identify these drivers or may have even measured them - I believe these drivers were also used in the YSP1100 and possibly other similar Yamaha processors from the mid-00s.
Crossing my fingers.
Adam
