sheesh! I wasn't trying to be harsh .... I just had this mental image of an 8" woofer beating inside a Corvette door right... and the driver, sitting there at the stoplight, testing out the new system, sunglasses, laid out all back in the seat right .... has absolutely no idea the 1/8" plastic/fiberglass body panel on the door is distorting in and out 100 times a second utterly destroying what appears to be a *
gorgeous* paint job...
And I seriously don't think that is going to sound very good. Even JL recommends against using its SUBwoofer drivers as midrange or infinite baffle... indeed, before that awful redo of thier website I could've linked to a blurb about NOT using thier 6w0 as a midbass or as an Infinite baffle speaker, as either will produce poor results... certainly the 8w3 isn't going to be the first choice here either. I think there are probably about a bazillion better choices for an 8" woofer... most of which can prolly be had for $40 over at partsexpress. If he wants sumthin to show off for a woofer application.. I dunno he can get that Adire Extremis or whatever ppl here like so much. That 8w3 is just the wrong driver all the way around.
BUT all that is just about the 8"... I still think that is going to produce seriously marginal results anyway... particularly next to a 3-way componet set.
heamph, of course every single OBJECTIVE thing you said was correct.. but the most impressive statement was the *one* subjective thing you said:
heamphyst wrote:
Sounds complicated, but it isn't. |
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AHAHAHA.... ur such a gearhead. What we did to *MY* front stage was complicated... *this* is ... IMO, a total mess. The mixture of passives and actives, particularly the passives up top, make proper adjustability really questionable to me. One thing I've begun to appreciate having all actives channels in my car, (and I only have 3) is the chokehold I can (and need to) exert over every speaker to reach sweet spot I'm aiming for.. The fact that the mid-range and tweeter are NOT going to be independently adjustable here I think is going to be a *severe* limitation to proper system tuning, particularly with all that garbage down below.
To me, as I read your system-plan, I see something that isn't realistic, just technically feasible.
I can think of a dozen variations on this system but regardless, I really think if we're seriously looking at dedicated midbass, there is *no* concievable gain (at least, far, far past diminishing-returns) in an actively crossed 3-way componet set up top... Here is what I would do... to simplify things, remove all (but one) passive xovers, and have a *damn* fine bi-amped system:
Ditch the whole AudioControl box.. we do this more elegantly..
Amplifiers:
450/4
300/4 (We're using this as a 2-channel, but it costs the same as a 300/2 and has 2 more channels.. so I'm not really sure the point of the 300/2... )
1000/1
Speakers:
A high-quality 2-way componet set(but this would *not* be my choice..)
A high-quality subwoofer..
And of course, our elusive
high-quality midwoofer/midbass/woofer/whatever
Now we have our equipment...
First, we take the 450/4 (heamph you've never looked at this amp!? It gives me goosebumps!) and bi-wire it to our midranges and tweeters directly to the amplifier. heamphs xovers points are perfect and all selectable from the amp natively.
Next our 300/4:
Here we unfortunately need our single passive xover... this will be a simple custom job ... at least I'm guessing. I've never built my own xovers before, but I just spend 5 minutes reading
this and playing with the calculator and it looks like a simplistic (as far as this nutty system goes) matter.. anywho.. the 24dB/slope is what I'd use this low in the spectrum... but I didn't see calculators for that so .. eh "3rd order high-pass" or whatever..
Anywho, low-pass the amp, which is bridged to our midwoofers, at 200hz or so, and passive it with a ... I dunno I really don't think you should go so low as 50hz..
But either way.. you guessed it.. the low, low xover point and midwoofers really gives me pause at the *pair* of 12's... perhaps something
bigger would better handle such a LOW low-end... and, IMO, be as technically impressive..
Indeed, have you considered a pair of 300/4's, the ZR's (or XR for that matter) built in bi-ampable xovers? Then wiring one 300/4 to the componet set and other, as outlined above, to your midbasses?
"I'm finished!" - Daniel Plainview