amazings/plats crossover mod

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mbskeam
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amazings/plats crossover mod

Post by mbskeam » Tue Oct 05, 2010 7:47 pm

I have a pile of parts,
have 1 set of low hr 30" ribbons
have 8 plat type woofers
have both types of crossovers, the amazing (30") type, (A) and the plat (3rd gen) type (B), not the mark4

if I do this will it work?????
want to take the A crossover and pull off the woofer parts.
and then use the woofer parts off of crossover B,
I think I drew it up right but not sure....
and the second thing I want to change the low/high crossover point to about 200hz, but I can go with the crossover from part B.
what, and how does one figure out what size cap to use, to get the crossover you want?


crossover A
Image


crossover B
Image



NEW.......?????
Image
Mbskeam

SILVER 7's
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#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
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2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
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Re: amazings/plats crossover mod

Post by angelod307 » Wed Oct 06, 2010 2:07 am

without looking up the xover point of the woofer, 450uf would make it around 80hz or so. the ribbons would have a huge gap to the woofer.
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mbskeam
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Re: amazings/plats crossover mod

Post by mbskeam » Wed Oct 13, 2010 2:46 pm

so I got one done, here are some pics....

Image

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Image
Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
SUNFIRE: Tube pre
WTL Amadeus GTA+DV DRT XV-1t
2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
― Aristophanes

The only thing I'll feel......will be the RECOIL
Necronomicon Ex-Mortis....... Klaatu Barada Nikkto
"We should seek the greatest value of our action"

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Re: amazings/plats crossover mod

Post by BillD » Wed Oct 13, 2010 7:20 pm

So how does it sound with the hybrid crossover?
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
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Re: amazings/plats crossover mod

Post by Scarabeo » Thu Oct 14, 2010 1:19 am

That is a lot of work - Those must be pain pills in that RX bottle back there! :lol: are those 30 inch Ribbons new ones? its going to be sounding real nice...
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Re: amazings/plats crossover mod

Post by mbskeam » Thu Oct 14, 2010 11:42 am

well the coil for the subs is suppose to have an ohm reading .4
1 is just that, the bank of subs is 3.9 as a set.....
the bad coil set reads 4.8
when I measure the bad coil it is 1.0 ohms
the other is right on at .4 ohms....
looks like I need to find a new set ...
but I will test them in the mean time....


also I found that the plats (ver3 60" ribbon) had the subs wired outa phase to the crossover and the print above....
hhhmmmm.... I wonder whats up with this...
oem bought new by me, never messed with this part before...
so the mystery as to the the phase grows....
Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
SUNFIRE: Tube pre
WTL Amadeus GTA+DV DRT XV-1t
2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
― Aristophanes

The only thing I'll feel......will be the RECOIL
Necronomicon Ex-Mortis....... Klaatu Barada Nikkto
"We should seek the greatest value of our action"

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Re: amazings/plats crossover mod

Post by BillD » Thu Oct 14, 2010 12:18 pm

Most coils when they go bad read either less than supposed to — like 0, or open — like ∞).
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
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Re: amazings/plats crossover mod

Post by TNRabbit » Thu Oct 14, 2010 12:21 pm

The reason for being wired out of phase is some components of the crossover invert the phase of the signal as it passes through---So inverting the wiring to the ribbons rectifies that inversion.
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Re: amazings/plats crossover mod

Post by TNRabbit » Thu Oct 14, 2010 12:23 pm

BillD wrote:Most coils when they go bad read either less than supposed to — like 0, or open — like ∞).
That would depend on why they went bad; burned up (overload) would probably more likely created a short between windings (melted together), REDUCING resistance, whereas it would take a break in the wiring to INcrease resistance....
Last edited by TNRabbit on Thu Oct 14, 2010 1:37 pm, edited 1 time in total.
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From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.

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Re: amazings/plats crossover mod

Post by BillD » Thu Oct 14, 2010 1:14 pm

HUH? :-k Nothing would increase resistance other than it going to infinity with a break.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
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Re: amazings/plats crossover mod

Post by TNRabbit » Thu Oct 14, 2010 1:38 pm

BillD wrote:HUH? :-k Nothing would increase resistance other than it going to infinity with a break.
Sorry, mis-typed. Fixed now~
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From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.

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Re: amazings/plats crossover mod

Post by mbskeam » Thu Oct 14, 2010 2:37 pm

The reason for being wired out of phase is some components of the crossover invert the phase of the signal as it passes through---So inverting the wiring to the ribbons rectifies that inversion.
yes...

this set of plats was the end of the 3's, I wonder if the CO is diffrent, than the one above?
It don't matter really, just found it interesting is all.
so when it is said that the plats (60") are wired in phase to the ribbon/woofers, ya better look close because they may not be.... ](*,) ](*,) ](*,) :D :D :D :D
now to find new coils....
Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
SUNFIRE: Tube pre
WTL Amadeus GTA+DV DRT XV-1t
2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
― Aristophanes

The only thing I'll feel......will be the RECOIL
Necronomicon Ex-Mortis....... Klaatu Barada Nikkto
"We should seek the greatest value of our action"

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Re: amazings/plats crossover mod

Post by BillD » Thu Oct 14, 2010 2:52 pm

FYI, Silvers (in Rev. H) used the same iron core inductor (8.5mH, 0.4Ω, 616-00074-00)
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer

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Re: amazings/plats crossover mod

Post by mbskeam » Thu Oct 14, 2010 9:12 pm

okay....
I went and reread a few things..... ](*,) ](*,) ](*,)

the ribbons on the silvers and plats are in phase to the CO, the woofers are out of phase to the CO...

the originals are, the ribbons out of phase to the CO, with the woofers in phase..... to the CO

me so stupid...... :lol: :lol: :lol: :lol:
Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
SUNFIRE: Tube pre
WTL Amadeus GTA+DV DRT XV-1t
2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
― Aristophanes

The only thing I'll feel......will be the RECOIL
Necronomicon Ex-Mortis....... Klaatu Barada Nikkto
"We should seek the greatest value of our action"

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mbskeam
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Re: amazings/plats crossover mod

Post by mbskeam » Thu Oct 21, 2010 9:46 pm

I did find new coils.....

http://www.erseaudio.com/Products/Super ... 1199706372

they are out of the 8.5mH but this will do....8.2mH raises the CO by 3Hz......

but one of the coils on the woofer part is bad, when I put a test tone of 1000Khz it plays loud and strong, while the left plays nothing, but a super faint tone, only when an ear is pressed to the woofer.....
so I need to order new caps also.... ](*,) ](*,) ](*,)
I did a few other checks and it comes back to a bad coil....
lets the highs go right on thru.....

also found out this....
when doing a phase test, take your preamp out of dolby phantom center channel mode...
it messes things up..... :lol: :lol: :lol: :lol: :lol:
Last edited by mbskeam on Fri Oct 22, 2010 12:03 am, edited 1 time in total.
Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
SUNFIRE: Tube pre
WTL Amadeus GTA+DV DRT XV-1t
2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
― Aristophanes

The only thing I'll feel......will be the RECOIL
Necronomicon Ex-Mortis....... Klaatu Barada Nikkto
"We should seek the greatest value of our action"

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