I have a pair of Legacy II and a pair of Prodigy II. I sent out all the
drivers for rebuild. On the instruction sheets that came with the boxes,
they indicate 6 ohms. I was curious about the driver DC resistance. I don't
have them with me at this time to take a reading.
I am using the Legacy II which is a 10 inch driver as the bass speaker. I
stack the Prodigy II on top to form a column, which is an 8 inch driver. I
have them bi-amped with 2 Crown PowerTech II amplifiers via an electronic
crossover. I use the smaller box for the mids and highs. I use the larger
box for the bass drive. I equalized them for the room using an Ashley
parametric EQ with phase compensation, and an acoustic spectrum scope. I
rewired the inside of the boxes with Belden AWG #12, and rebuilt their
internal crossovers, I feed them with Belden AWG#10 from the amps. I am able
to get a total frequency response down to less than 30 Hz, and clean up to
about 24 kHz within a few Db. The THD was measured at less than 3%. The
amps are over 300 w/CH at 8 ohms with a damping of more than 1200.
I listen mostly to opera, classical, and jazz. The performance sounds like
it is live in the room! My listening room is 26 X 16 feet.
The speaker rebuilder told me that the foam will rot in about 6 to 10 years.
I asked about using another type, such as a rubber base. He told me that it
will change the accuracy of the driver from its original design. He
suggested to stay with the foam to have the original specs, and put up with
getting them rebuilt again.
For the specifications that these speaker boxes can put out, they were very
reasonable in their price. These boxes are very well constructed, and with
the proper set-up, they can put out very accurate and very re-enforced
sound.
--
Jerry G.
======
Would anyone know, the DC resistance for the main driver, and the impedance
of the main driver used in the Advent Legacy II speaker box?
I know that the total speaker unit is rated at 6 ohms. I need to know the
bass driver's DC resistance.
Thanks.
Most of Advents speakers were 8 ohm impedance with the notable
exception of the 'smaller Advent loudspeaker' which was a 4 ohm
system. I have 2 old 'larger Advent' woofers in need of foam. The
voice coils read 4.97 and 4.92 ohms with a Fluke 8060. And no, I'm not
interested in selling them.
GG
