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#21879 - 07/28/03 10:14 AM 755 with 2 200s
jdh Offline
Deputy Gunslinger

Registered: 04/01/02
Posts: 12
Right now I have a 950/755 combo as my room can accommodate only this. I'm hoping to be able to move up to 7.1 soon though. I'm planning on using 2 200s for my mains. Any suggestions as to how to hook up my remaining speakers to the 755 since I will have 4 surrounds (R and L sides and 2 rears) and no mains hooked to it. Does it really matter? Thanks.
John

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#21880 - 07/28/03 11:57 AM Re: 755 with 2 200s
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
You mean which channels to use for what? It doesn't really matter -- you could put the rears on the channels labeled for the mains (assuming that the mains are moving to the 200's, as it sounds like they are) and leave everything else as-is.

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#21881 - 10/24/03 07:44 PM Re: 755 with 2 200s
obie_fl Offline
Gunslinger

Registered: 12/20/02
Posts: 194
I have that exact set up. I think my center is on the center channel the sides on the surround and the rears on the mains.
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#21882 - 12/13/03 05:05 PM Re: 755 with 2 200s
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
Here's my understanding:

The 755 has two toroidal transformers. If Outlaw uses them like most amp-makers, 1 is for the surrounds and center, and the other is for the mains. (They try to balance the power delivery capability.)

Seeing as how the surrounds get more content than the rears, having the surrounds as the mains, and the rears as the surrounds might make the most sense.
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#21883 - 12/14/03 01:19 AM Re: 755 with 2 200s
Unferth Offline
Gunslinger

Registered: 12/31/02
Posts: 148
Loc: Homewood, AL, US
Quote:
Originally posted by Kevin C Brown:
...Seeing as how the surrounds get more content than the rears, having the surrounds as the mains, and the rears as the surrounds might make the most sense.


This is how mine is set up.. and it works great... I haven't had it set up any other way though, but I haven't ever had a problem thinking that the surrounds or back surrounds or center weren't getting enough power... always plenty

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#21884 - 12/14/03 10:26 AM Re: 755 with 2 200s
stabie Offline
Gunslinger

Registered: 09/21/02
Posts: 93
Loc: Austin, TX US
The 755 uses two different transformer sizes. The one driving 3 channels is quite a bit bigger. I imagine each channel gets the same number of "turns" in the transformers, so I think the channel assignment is probably moot. The transformers are located in the front of the 755 & boy you can tell. Almost *all* the weight is in the front.

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#21885 - 12/14/03 05:09 PM Re: 755 with 2 200s
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
That is true, but, ... I personally am very finicky about making sure that the center channel has enough power. Handles upwards of 70% of the content of movie soundtracks. So to me, still makes more sense to make sure the center channel is on the same transformer as the rears and not the surrounds.
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#21886 - 07/28/04 05:51 PM Re: 755 with 2 200s
alzy101 Offline
Deputy Gunslinger

Registered: 07/28/04
Posts: 2
I just purchased 2 M-Blocks to go with my 755. Both M-blocks have considerable hiss even with the preamp (Denon 3803) mutted and even with it disconnected from the amp input, while all 5 channels of the 255 are dead quiet. Are your 200's noisier than the 755 or are mine defective?? The hiss can be heard up to about a foot away from the speaker depending on ambient noise.

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#21887 - 07/28/04 06:23 PM Re: 755 with 2 200s
tekdredger Offline
Gunslinger

Registered: 02/28/03
Posts: 142
Loc: Franklin, WI
Quote:
Originally posted by alzy101:
The hiss can be heard up to about a foot away from the speaker depending on ambient noise.


I usually sit much further back.


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#21888 - 07/28/04 07:20 PM Re: 755 with 2 200s
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
It could be a ground look hum, too - I'd check out the routing of my power and signal cables and try unhooking the cable if you have cable TV (a common source of ground loops).

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gonk -- 950 Review | LFM-1 Review | Pre/Pro Comparison Chart | Saloon Links
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Reviews: Index | 990 | speakers | BDP-93

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#21889 - 08/04/04 02:43 PM Re: 755 with 2 200s
Bob045 Offline
Gunslinger

Registered: 07/25/04
Posts: 90
Loc: USA
alzy101,

Did you ever solve the hiss issue you were haveing with the M200's?

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#21890 - 08/04/04 06:10 PM Re: 755 with 2 200s
alzy101 Offline
Deputy Gunslinger

Registered: 07/28/04
Posts: 2
Quote:
Originally posted by Bob045:
alzy101,

Did you ever solve the hiss issue you were haveing with the M200's?



No. They sent me out a swap unit to see if the 2 I had were defective but all three performed the same. I get considerable noise out to a foot away from the speaker. I have owned and tested many power amps over the years and none had anywhere near this level of noise. I believe that a decent power amp should add no audible noise to my system. And it is not my system since the noise is the same whether my preamp is connected or not or on mute.I get the noise with no input connection, just a speaker and power. It is not a hum problem as it is wide band "white" noise. I am returning the units for a refund. All 5 channels of my 755 are dead quiet under exactly the smame set up. The M-Blocks in my opinion do not belong in a quality system. I can't imagine having 7 M-Blocks all hissing away in my otherwise quiet listening room. Should have started with the 770.Thanks for asking.

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#21891 - 08/17/04 11:59 PM Re: 755 with 2 200s
Bob045 Offline
Gunslinger

Registered: 07/25/04
Posts: 90
Loc: USA
Well at least you had one solution open to you ( returning them! ). Sorry to hear it worked out that way. I do not doubt that you heard hiss from the speakers and I imagine you did all the appropriate tests to locate it.

While this might be slightly divergent from topic, I wanted to put this out there as it may be of benefit to some.

I live in an older house and while all wiring is in code, the wire placement was not of the best design. I recently had hiss in one speaker. Swapping the speakers ( stero mains ) proved nothing, I still had hiss in the right speaker. Figuring it was the amp, I thought I would take it in for service. The day before I did, I was in the basement and happened to be right below the main stereo room. Above me was a small juction box on the roof of the basement, which was the floor of the stero room. Going back upstairs, I disconnected the speaker, from the amp.

Amusingly enough, I still had hiss. Moving the speaker solved the issue.

Bob045

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