This is an Altec Voice of the Theater A5 system. There are 5 components that make it up, the bass bin, the horn, the crossover the bass bin driver and the horn driver.
It features an 828 bass bin with a 416 driver and a 500Hz crossover
You can see my favorite speaker cables, the blue 47 labs cable entering the crossover located on the back of the bass bin. Everything 500Hz and lower goes through the bass bin. Everything higher than that goes through the horn. Usually you'll see 511b horns and 808 driver. In that config they are called A7's. Mine have the 803 horns and 288 drivers so these are A5's
The horns and the horn drivers also play a role. The 511b horns are rated for 500Hz and the 803 and 1003 cut over at 300 Hz. The 8 means an 8 cell horn, the 10 means a 10 cell horn.
This driver is an Altec 288-c which is rated for 40 watts.
This is pretty much the basic config for speakers. I have to run now, but we'll expand on this later
HT - Sunfire TG IV, Sunfire Cinema Grand Sig. 400 x 5, Oppo 93, Klipsch LaScala (3), Cornwalls (2), SW-12, Sony 60" LCD
2 channel - AN L2 Pre-amp, AN Interstage Mono Blocks 300b PSE, AN 2.1 DAC, Oppo DV-981HD, Lowther PM4a/Azurahorn/SentryIV
2 channel - AN L3 Signature Line stage, AN Interstage Mono Blocks 300b PSE, AN Sig. DAC 3.1 , AN Sig. Phono Stage, Sota Comet TT, Altec A5's
2 channel - empty, Klipschorns
2 channel - Audio Note Kit 1 300b SET, Audio Note DAC 2.1, Altec A4's