Nelson Pass said:TAD, PHL, Polydax Pro (aka Audax), Fostex, Beyma and Selenium instead of beer.
And of course the ever popular Altec 604's [/B]
Variac said:How about a bipolar speaker? The PHL 1240TWX (with tweeter) faces forwarda plain PHL 1240 faces back.
The 1240 has 93 dB efficiency, the tweeter is higher.So if I have one forward and one back will the efficiency be 96dB for the 1240's ? Solves the bafffle step issue, right?, but does it also increase efficiency in the midrange also?
Second possible approach: I'm planning on getting a Fostex FE206 to make a varient on the Basszilla (instead of the FE208)
The driver is mounted in an open baffle. Will the PHL 1240TWX work in an open baffle instead?
Ok another question: What if I mount a 1240TWX AND a 1240 in a vertical array facing forward on an open baffle? Double the efficiency to 96 (the same as the Selenium woofers) Does the tweeter being in the center of one driver screw things up? Obviously not a D'Appolito, but the drivers don't have a tweeter keeping them apart. suggested crossover is 3k.
Nelson Pass said:Lately my favorites have been:
TAD, for the big buck crowd,
PHL for the slightly less wealthy
Polydax Pro, for slightly less $ yet
Fostex for the budget minded
Beyma and Selenium instead of beer.
And of course the ever popular Altec 604's
Horns are acoustic transformers, and work by taking a high pressure smal displacement signal at the throat, into a low pressure larger displacement by the mouth.skaara said:Whats with horns, why are they so efficient? Dont they make some distortion, how are they made?
Variac said:Dave BSC = baffle step correction I assume. Actually I cross over to the 15" woofer which is in a bass reflex box at the point that the baffle stops working so I don't think I need BSC.
The PHL would allow me to have the tweeter concentric. I suspect that the tweet is an audax unit.
OK, I'm tempted to do the open baffle. (buck up Dave!)
Is there any advantage to having the woofers right next to each other? or do they need to be spaced apart? The crossover freq is 3khz. I know in MTM arrangements the spacing matters-right? This would be more like an TMM [/B]