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Bi amp Carver Amazing Platinums....

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jonsoulman

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Posts: 4

Joined: Sun Oct 21, 2012 6:33 pm

Post Sun Oct 21, 2012 6:45 pm

Bi amp Carver Amazing Platinums....

My current system includes a Denon DP1000 with SME arm and MC cartridge (tweeked)
ARC SP 8
pair of ARC Classic 120s
All interconnects, power conditioning and speaker cable are Transparent.
I have three dedicated 20 amp circuits
Von Shweikert tower sub (powered with carver 800w amp)
Carver Amazing Platinum speakers.

I am currently using the passive crossovers in the Platinums with the "base" turned down completely and using the sub for fill below 100hz.
I want to bi amp the Amazings
Listening room is 24'x45' with a 20' vaulted ceiling and good base traps in back (behind listener) 24' wall

I have an ARC EC21 I could use for an active crossover.
Anybody have suggestions for crossover points and slope?
Any other suggestions?
Newbie here. First posting
J
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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

Posts: 13331

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Sun Oct 21, 2012 7:20 pm

Re: Bi amp Carver Amazing Platinums....

Most have made the crossover upwards of 200 hz, but I personally find the sound more pleasing when I keep it around 160-180 hz. I think the natural falloff of the ribbons to be about 165 hz.

Slope can be 6 dB/octave, but others have used higher slopes with good success. If you're crossover is selectable, you can play with it to find out what you like. FYI, every 6 dB will invert your phase 180 degrees.

You'll want to be able to adjust for ribbon delay to match the woofers (done passively in the passive crossover).
TNRabbit
Image

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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Martin1970

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TFM-25

Posts: 356

Joined: Sat Mar 06, 2010 5:44 pm

Location: Savannah, GA

Post Sun Oct 21, 2012 8:21 pm

Re: Bi amp Carver Amazing Platinums....

Here are my current crossover points. All crossovers are Linkwitz-Riley 24dB/octave.
The Amazing woofers are cut off at 50 Hz because they smoke badly at 100+ dB if you let them play lower. Letting the subs play up to 80 is a no-no, but it works in my tiny room for some reason, ymmv.

Welcome to the forum. Let's see some pics of your system.

Image
Carver: ALS plat upgrades, TX-11a, C-9, C-1
Sunfire: Cinema Grand Sig 400 Seven x2
Rane: RPM88 26Z x3
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jonsoulman

Newbie

Posts: 4

Joined: Sun Oct 21, 2012 6:33 pm

Post Mon Oct 22, 2012 6:02 pm

Re: Bi amp Carver Amazing Platinums....

Thanks for the quick responses. I have an Audio Research EC21 tube 2 way crossover with a mono bass output. I can figure out the crossover point around 175 or so but I don't know how to make that adjustment for the "ribbon delay". Am I to assume if I have a slope of 12db my phase will be normal? The ARC is not adjustable, I will need to do some soldering...(TNRabbit)

I like the idea of putting a floor on the 12" woofers since I have the VonSweikert (800w) pounding tight well below that 50hz.
That is a very impressive "wall of sound" (Martin1970)
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MRHP

User avatar

TFM-75

Posts: 895

Joined: Wed Jan 18, 2012 2:36 pm

Location: Buzzard Creek Ky

Post Thu Oct 25, 2012 6:34 pm

Re: Bi amp Carver Amazing Platinums....

Martin1970 wrote:Here are my current crossover points. All crossovers are Linkwitz-Riley 24dB/octave.
The Amazing woofers are cut off at 50 Hz because they smoke badly at 100+ dB if you let them play lower. Letting the subs play up to 80 is a no-no, but it works in my tiny room for some reason, ymmv.

Welcome to the forum. Let's see some pics of your system.

Image


400w per/ch to the DQ8 tweeters?!?!?! If so, thats awesome! =D>
TFM-75 serial #0001
PT-2400 serial #0001
Baby Black serial #0001
A Lightstar or two
Cherry/260's
Carver 490t
Sunfire Tube preamp
ProJect TT Tube preamp
DENON DP-62L TurnTable
Dual CS5000 Turn Table
DQ-20's
Douglas Cables
OK ERIC, LET GO OF THE MOUSE AND BACK AWAY FROM YOUR PC WITH YOUR HANDS IN THE AIR. NOW SLOWLY LAY FACE DOWN ON THE FLOOR!!!! - Snoop65
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angelod307

SILVER-7 TUBE AMP

Posts: 2713

Joined: Sat Jun 06, 2009 10:56 pm

Location: manning, sc

Post Thu Oct 25, 2012 10:55 pm

Re: Bi amp Carver Amazing Platinums....

TNRabbit wrote:Most have made the crossover upwards of 200 hz, but I personally find the sound more pleasing when I keep it around 160-180 hz. I think the natural falloff of the ribbons to be about 165 hz.

Slope can be 6 dB/octave, but others have used higher slopes with good success. If you're crossover is selectable, you can play with it to find out what you like. FYI, every 6 dB will invert your phase 180 degrees.

You'll want to be able to adjust for ribbon delay to match the woofers (done passively in the passive crossover).



i won't swear although i know many of the words, but , for every 6db it is 90 degrees out so 12 would be 180. i could and may be wrong. just what i remember from rockford fosgate traing in the late 80's.
CarverFest: I just go for the arts and crafts
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TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13331

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Fri Oct 26, 2012 3:41 am

Re: Bi amp Carver Amazing Platinums....

angelod307 wrote:
TNRabbit wrote:Most have made the crossover upwards of 200 hz, but I personally find the sound more pleasing when I keep it around 160-180 hz. I think the natural falloff of the ribbons to be about 165 hz.

Slope can be 6 dB/octave, but others have used higher slopes with good success. If you're crossover is selectable, you can play with it to find out what you like. FYI, every 6 dB will invert your phase 180 degrees.

You'll want to be able to adjust for ribbon delay to match the woofers (done passively in the passive crossover).



i won't swear although i know many of the words, but , for every 6db it is 90 degrees out so 12 would be 180. i could and may be wrong. just what i remember from rockford fosgate traing in the late 80's.


Thanks for the correction, Angelo. You are right.
TNRabbit
Image

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.
<<

Martin1970

User avatar

TFM-25

Posts: 356

Joined: Sat Mar 06, 2010 5:44 pm

Location: Savannah, GA

Post Fri Oct 26, 2012 5:49 am

Re: Bi amp Carver Amazing Platinums....

MRHP wrote:400w per/ch to the DQ8 tweeters?!?!?! If so, thats awesome! =D>


The fuses pop pretty regularly on tracks with lots of hf energy.
Really need to get a line of those tweeters or something.

You've got me beat with what you're doing with those 20s!
Carver: ALS plat upgrades, TX-11a, C-9, C-1
Sunfire: Cinema Grand Sig 400 Seven x2
Rane: RPM88 26Z x3
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MRHP

User avatar

TFM-75

Posts: 895

Joined: Wed Jan 18, 2012 2:36 pm

Location: Buzzard Creek Ky

Post Sat Oct 27, 2012 2:04 pm

Re: Bi amp Carver Amazing Platinums....

Well thank you for the compliment, I would like to hear your system its interesting how you have it setup. What kind of crossover do you use?
TFM-75 serial #0001
PT-2400 serial #0001
Baby Black serial #0001
A Lightstar or two
Cherry/260's
Carver 490t
Sunfire Tube preamp
ProJect TT Tube preamp
DENON DP-62L TurnTable
Dual CS5000 Turn Table
DQ-20's
Douglas Cables
OK ERIC, LET GO OF THE MOUSE AND BACK AWAY FROM YOUR PC WITH YOUR HANDS IN THE AIR. NOW SLOWLY LAY FACE DOWN ON THE FLOOR!!!! - Snoop65
<<

Martin1970

User avatar

TFM-25

Posts: 356

Joined: Sat Mar 06, 2010 5:44 pm

Location: Savannah, GA

Post Sat Oct 27, 2012 3:18 pm

Re: Bi amp Carver Amazing Platinums....

MRHP wrote:Well thank you for the compliment, I would like to hear your system its interesting how you have it setup. What kind of crossover do you use?

It's a work in progress... needs a much bigger room/house.

The crossover is a Rane RPM-88 multiprocessor, kind of an audio Swiss Army knife.
Image

Image
Carver: ALS plat upgrades, TX-11a, C-9, C-1
Sunfire: Cinema Grand Sig 400 Seven x2
Rane: RPM88 26Z x3

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