420s are fun drivers. they do have some limitations. but nice overall.
I did a search on the 420 biflex driver and the most recent post was from 2012. Sorry if I am resurrecting an old topic.
Over the weekend, I put a 420 biflex driver into a 828 cabinet just to see how it sounded.
To my amazement, it sounded very good running full range.
I had it connected to a Merlin ISP-100 active crossover and began merging it with 1005B / 288-16G horn driver. I found that around 7500 Hz is a good place to crossover.. the two and still sound good.
Just wondering if someone else has tried this.
Full the 420 in full range mode, it sounds like it can make it up to 10-12K. I was pleasantly surprise.....
This is going to be more fun then the other project that I am working on.... tuning an A7 into MLTL.
420s are fun drivers. they do have some limitations. but nice overall.
Sonic Barbarian
Mids sound nice, bass is full and impactful. There are no highs. Not as efficient as the 515 and the 416 ...What are the other limitations?
Not sure how well this combo will perform as the horn's increased throat pressure will damp the bi-flex's small mid driver or worse, it may modulate it out of phase or even damage it at higher power. Only one way to know for sure though.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
Then you get it reconed as a 416....
I m biamping with 6w/Ch tube amp, added a 511b/902-8b for the highs. Crossover at 3750hz with 24db butterworth crossover, it sounds really good. I push the crossover point higher but base on my hearing, less than 4000 hz appears optimal.Originally Posted by GM
Fellas in Eastern Europe i have sold bi-flexes to really like them in back loaded horns, ah la JBL 4530 etc..
Not all vegetables make good leaders.
I don't think I can afford to house anymore large cabinets, although I would still like a set of model 18s. One thing that I do notice with the 420s in a 828 cabinets, that shrinking the port size ala the 416 or 515 woofers did not improve the bass. They seem to like the bigger port size.
Food for thought
Rusinos_Altecus_Maximus_Alnico_Lampizator
Interesting project. In a 828 cabinet at least, I didnt really care found the sound when crossover point is push above 4K. To my years, the system loses some agility. I can try to play with the crossover again... and push it to 7K. That is the beauty about using a electronic crossover. It makes changes like this quick and easy.
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