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Carver AV 64 Cathedral Amp- how to bridge

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BillD

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Post Tue Jan 12, 2010 10:41 am

Re: Carver AV 64 Cathedral Amp- how to bridge

With the red pill in, I'm going to suggest this approach, as it seems to have been used in all the bridgeable Carver amps that are common ground. You hook the input only to the left input. The left red goes to the + on your speaker and the right red goes to the -. Mono button in.

Inverting amps typically don't have a switch, and you need to feed both inputs the same signal, and you hook the non inverted side (red) to the + on the speaker and the inverted side (black) to the -.
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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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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cpus456

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Post Tue Jan 12, 2010 4:26 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

BillD wrote:With the red pill in, I'm going to suggest this approach, as it seems to have been used in all the bridgeable Carver amps that are common ground. You hook the input only to the left input. The left red goes to the + on your speaker and the right red goes to the -. Mono button in.

Inverting amps typically don't have a switch, and you need to feed both inputs the same signal, and you hook the non inverted side (red) to the + on the speaker and the inverted side (black) to the -.

Yeah, tried this method and there is sound, but so low that i had to put my ear to the speaker
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BillD

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Post Tue Jan 12, 2010 4:31 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

If you are sure you ONLY connected one input, I'd try to put it in the other input. If you connected BOTH inputs, they are probably cancelling each other out.
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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cpus456

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Post Tue Jan 12, 2010 8:34 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

The beautiful People at Ritas send me a page from the manual

Image
Image

Click on image to open and zoom

So it looks like i have to put a jump between ch1 and ch2 and click Biamp
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cpus456

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Post Tue Jan 12, 2010 9:28 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

Being that this diagram only uses one input(L+R) and i wanted to use the amp to power my center and two rear surround backs i tested the following

- CH 1 and CH2 jumped
- RCAs L+R going into channel 1 and 2
- Pressed the Biamp button (whicH activates the bridging)
- left the MONO DEselected (as it sets it to 75 hz 18 db octive, which im
- assuming is to allow only low end for the sub)

Hooked up the volt meter and got 23 volts, which is the highest thus far
unpluging on of the rcas drops the volts to 8 volts, so im gonna have to get an Y plug that takes my center rca and splits it to two.

with the rca connected to Channels 3 and 4 their respective outputs are putting out 12volts - so these can power my surrondbacks

Comment, concerns, suggestions
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BillD

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Post Tue Jan 12, 2010 9:33 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

I see what's going on but I still can't believe it was designed that way (especially since the switch could have done the bridging of the outputs without you running one external).
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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cpus456

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Post Tue Jan 12, 2010 10:24 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

while testing just as the diagrams shows i got a blue spark around channel 2's red post (inside) i could see it through the grills

Channels 3 and 4 seem to be working fine.

Opened up and theres nothing visible wrong, caps look good, but then again i really dont know what to look for. ERRRRRRRRRRRRRRRRR!
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Jag_97470

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Post Tue Jan 12, 2010 10:43 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

I guess it makes sense if you had the same set-up as the diagram, but even looking at that I'm confused or Brain dead or something! ](*,) Maybe e-mail Rita again and ask if she could please diagram for you the correct set-up for what you want to do >power my center (bridged) and two rear surround. :-k
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cpus456

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Post Tue Jan 12, 2010 11:08 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

Jag_97470 wrote:I guess it makes sense if you had the same set-up as the diagram, but even looking at that I'm confused or Brain dead or something! ](*,) Maybe e-mail Rita again and ask if she could please diagram for you the correct set-up for what you want to do >power my center (bridged) and two rear surround. :-k

No sense in it now - channels 1 and 2 seem to be toast - nothings coming out of them now

Looks like my only option is to us the amps 3rd and 4th channel to power my center and forget about the rears

Ill be getting 60 watts to my top post and 60 watts to my bottom post on my Polk csi a6 center speaker.

Is it going to be a big difference compared to the advertised 110 watts that my Pioneer receiver say it pushes out per ?? ive already put my front towers on my tfm 55x
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cpus456

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Post Wed Jan 13, 2010 9:34 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

So I BIAMPed it with channels 3 and 4 (the two remaining ones) my center channel today (Polk audio CSIA4)

Im quite pleased with the unit
Definition is much better with the unit

I got the unit to about -7db on my pionner reciver and a little orange lite above channel 3/4 overload/clipping started to blink, turned it down to -9bd and it went away.

During regular tv watching its usually around 28db, so its plenty loud.

The weird thing that is happening now is that the ch1/2ch overload/clipping is a solid orange. Whats weird is that its not being used.

Sound has not changed at all????
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ArthurFromCanada

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Post Tue Jan 26, 2010 12:18 am

Re: Carver AV 64 Cathedral Amp- how to bridge

IMO, just drive your center channel with a bridged M-1.5t and put this whole thing to bed \:D/

And you won't need to worry about clipping, because by that point, you either won't have a center channel speaker left or you'll be more concerned with the weird ringing in your ear =D>
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TNRabbit

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Post Tue Jan 26, 2010 4:44 am

Re: Carver AV 64 Cathedral Amp- how to bridge

Art, the M1.5t is not a bridgeable amp.
Last edited by TNRabbit on Wed Jan 27, 2010 4:42 am, edited 1 time in total.
TNRabbit
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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"

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ArthurFromCanada

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Post Tue Jan 26, 2010 12:02 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

TNRabbit wrote:Art, the M1.5t if not a bridgeable amp.


You can have all the amp's power diverted to one channel with the M-1.5t.

Art
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TNRabbit

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Post Tue Jan 26, 2010 10:53 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

ArthurFromCanada wrote:
TNRabbit wrote:Art, the M1.5t if not a bridgeable amp.


You can have all the amp's power diverted to one channel with the M-1.5t.

Art


Incorrect. UP TO 750 watts can be directed to one channel, as long as the total output doesn't exceed 1200 watts. I'm pretty sure it doesn't sound so good at that level, though~
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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BillD

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(pair of) SILVER-7 TUBE AMPs

Posts: 7295

Joined: Wed Jun 06, 2007 8:29 pm

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Post Tue Jan 26, 2010 11:24 pm

Re: Carver AV 64 Cathedral Amp- how to bridge

Yeah, while the entire power supply is available, the output devices will limit the output.
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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