Advent model history..........
Posted 13 March 2002 - 11:12 PM
The Advent 2 was an odd critter, came in two cabinet versions, one wood and one white plastic/ fiberglass. The woofer was built on the Samller Advent frame, same magnet and coil, but the cone was much smaller and higher resonance. It had to use an adapter ring like the old Large Advent woofers because the cone was too small for the frame.
Tweeters were small paper cone units, used mainly to save money [much cheaper to make than the dome tweeters]. These were only made for a few years then replaced with the "Baby" series which lasted through three versions.
The Advent 3 was a still smaller version of the 2, with a roughly 5.25" woofer and single cone tweeter, later replaced by the "Mini" series speakers.
Posted 02 March 2002 - 12:49 PM
Posted 02 March 2002 - 03:48 AM
Also, I was under the impression the "New Advent" came out around 76. Maybe it was the review that came out in 78, and they hadn't gotten around to testing them till then. Could someone clarify?
Posted 01 March 2002 - 10:06 PM
By the next model year...POOF...we start seeing Advent's own version of this poly dome tweeter in all their models.
As far as the frequency response, remember that you are looking at a bi-amped speaker with an electronic crossover. By tweaking the electronics you can get a "flat" response from most any reasonable driver combination. All but a few of the very best powered monitors have EQ curves built into the amps to flatten them out. This can also be done with passive crossovers, but the designs can get very complex and all the added components can easily lead to more signal loss and distortion.
Posted 01 March 2002 - 12:11 PM
Posted 27 February 2002 - 09:12 PM
Posted 25 February 2002 - 10:34 PM
Posted 18 December 2003 - 12:02 AM
The woofer section is flat up to the 12db/oct rolloff at about 4500hz. The lower end can be boosted up to 6db at 30hz if desired. You can also throw in a 6db/oct rumble filter below 20hz if desired.
The tweeter section rolls off below about 4500 too, first at 6db/oct, then going to 12 db/oct. below about 1500. I've not yet tested the Drivers to see what they are doing acoustically, but clearly the electrical crossover is much higher than the original Advent passive crossovers.
If the woofers have a gradually falling high end (not hard to imagine with that heavy cone & a ten inch diameter!), and if the tweeter response actually rises below 5000 down to it's resonance, then the actual "acoustic" crossover could be lower than 4500, maybe even match that of the original design - or the 1500hz published. If this proves the case it could explain why this design had apparently better "highs" than the passive models with the same drivers. The tweeters would have been basically flattened electronically and boosted in amplitude....and the bass improved in depth by the added boost on the low end.
I'll test the drivers soon with the original passive xover as well, and make the curves available on this site if anyone is interested.
I had double Advents in the 70s - I loved the smooth extended bass, wide soundstage and realistic string tone. I then used the woofers as subs for years after and am going to go back now & rebuild them as triple or quad-advent systems. The powered advents were amazing with their dynamics - the crossovers could be helpful to those of us wanting to duplicate or experiment with the designs nowadays.
Happy Holidays to all!
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