D-Sonic custom Audio amps - Page 62 - AVS Forum | Home Theater Discussions And Reviews
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post #1831 of 1989 Old 04-06-2018, 09:30 AM
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Quote:
Originally Posted by David Varner View Post
Just learned something


There is no "American" or "European" XLR pinout. The AES adopted a standard of pin 2 = + (or "hot") and pin 3 = - (or "cold") back in 1992
I'm pretty sure Emotiva started all of this confusion. I can't believe Anthem put it in their manual!

Last edited by Marc Alexander; 04-06-2018 at 09:33 AM.
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post #1832 of 1989 Old 04-06-2018, 09:39 AM
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Quote:
Originally Posted by David Varner View Post
Yes It does just like reversing the + and - wires on speaker wires.

As long as all of your cables and equipment are the same kind of pin out you are fine. All my equipment is US and I do check the manual upon set up to see if it is the same as I use. I make my cables and this is how all my XLR cables and equipment pin out.

Pin 1 = negative
Pin 2 = positive
Pin 3 = shield
David, Pin 1 should always be ground. Shield usually stays disconnected on XLR interconnects. What equipment do you have that uses the Emotiva wiring? I'm fairly confident that D-Sonic uses the correct wiring.
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post #1833 of 1989 Old 04-06-2018, 09:44 AM
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Quote:
Originally Posted by David Varner View Post
As long as all of your cables and equipment are the same kind of pin out you are fine. All my equipment is US and I do check the manual upon set up to see if it is the same as I use. I make my cables and this is how all my XLR cables and equipment pin out.

Pin 1 = negative
Pin 2 = positive
Pin 3 = shield
Pin 1 should be shield
Pin 2 = +
Pin 3 = -

At least that's how I'm wired with all of my XLRs....
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7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1834 of 1989 Old 04-06-2018, 09:48 AM
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Quote:
Originally Posted by Marc Alexander View Post
David, Pin 1 should always be ground. Shield usually stays disconnected on XLR interconnects. What equipment do you have that uses the Emotiva wiring? I'm fairly confident that D-Sonic uses the correct wiring.
Yep, as does Anthem and my Class D Audio amp, and SVS subs....!

How do mean shield is usually disconnected on XLR interconnects? I thought shield and ground are the same thing with XLR....

7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1835 of 1989 Old 04-06-2018, 10:11 AM
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Quote:
Originally Posted by Jonas2 View Post
Pin 1 should be shield
Pin 2 = +
Pin 3 = -

At least that's how I'm wired with all of my XLRs....
Sorry u are correct post edited.

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post #1836 of 1989 Old 04-06-2018, 10:36 AM
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Quote:
Originally Posted by Jonas2 View Post
Yep, as does Anthem and my Class D Audio amp, and SVS subs....!

How do mean shield is usually disconnected on XLR interconnects? I thought shield and ground are the same thing with XLR....
I always connect the shield that's what separates them from RCA. The shield rejects RFI, EMI, and so forth. Without XLR cables to my three Subs they will buzz like crazy.

Short runs RCA no problem.Long runs XLR.

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post #1837 of 1989 Old 04-06-2018, 10:54 AM
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Quote:
Originally Posted by Jonas2 View Post
How do mean shield is usually disconnected on XLR interconnects? I thought shield and ground are the same thing with XLR....
If you take apart an XLR connector you will find 4 solder points. The 4th is for the shell casing. On every mic cable I've seen the foil shield is left floating, even though it can be connected to point 4. Connecting would likely lead to some ground loop issues as it would be tying together the chassis.
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post #1838 of 1989 Old 04-06-2018, 01:25 PM
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Quote:
Originally Posted by Marc Alexander View Post
If you take apart an XLR connector you will find 4 solder points. The 4th is for the shell casing. On every mic cable I've seen the foil shield is left floating, even though it can be connected to point 4. Connecting would likely lead to some ground loop issues as it would be tying together the chassis.
Interesting no foil on the mogami quad cable I use but know I know.

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post #1839 of 1989 Old 04-06-2018, 02:26 PM
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Quote:
Originally Posted by David Varner View Post
Interesting no foil on the mogami quad cable I use but know I know.

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If its a dual cable you have to use the braided shield for signal ground.


A tri/quad cable often has a foil over the braid. You can chose to use the braid as signal ground but I prefer to use one of the insulated wires and leave the braid unconnected. Another strategy is to connect the braid to chassis ground on the female side and float it on the male.
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post #1840 of 1989 Old 04-06-2018, 03:52 PM
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Quote:
Originally Posted by Jonas2 View Post

How do mean shield is usually disconnected on XLR interconnects? I thought shield and ground are the same thing with XLR....
All three pins are connected on the cables themselves.

Inside your amplifier pin 1 (shield) is supposed to terminate to earth ground as close to the xlr connector as possible. It does not go to the amplifier modules where pin 2 and pin 3 go.

Google the pin 1 problem.
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post #1841 of 1989 Old 04-06-2018, 06:27 PM
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Quote:
Originally Posted by Marc Alexander View Post
If you take apart an XLR connector you will find 4 solder points. The 4th is for the shell casing. On every mic cable I've seen the foil shield is left floating, even though it can be connected to point 4. Connecting would likely lead to some ground loop issues as it would be tying together the chassis.
Ah, gotcha, yeah forgot about that extra solder point on the connectors, but it's there alright! I've only ever used one type of XLR with "wrapped shield" wire, wasn't even foil, was braided, tinned copper with a drain wire, though the drain wire and shield touch, so I totally don't get how that even works. Anyway, drain wire went to Pin 1! This was the Belden 1800F (only XLR I was able to find in-wall rated....).

Quote:
Originally Posted by David Varner View Post
Interesting no foil on the mogami quad cable I use but know I know.
Nope! Just the braided copper - and this wire, hands-down, is my FAVORITE. I just find the spiral wire so much easier to work with than braided. Thank you Mogami. And it's available in a bunch of colors....

Quote:
Originally Posted by dwaleke View Post
All three pins are connected on the cables themselves.

Inside your amplifier pin 1 (shield) is supposed to terminate to earth ground as close to the xlr connector as possible. It does not go to the amplifier modules where pin 2 and pin 3 go.

Google the pin 1 problem.
Oh yes, I remember reading about this when I was first deciding on building the XLR cables and had a ground loop! (That turned out to be the safety ground for my Comcast system....)

7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1842 of 1989 Old 04-14-2018, 06:40 AM
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Do the m3 multi channel amps have some sort of gain control?
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post #1843 of 1989 Old 04-14-2018, 07:42 AM
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Do the m3 multi channel amps have some sort of gain control?
No your pre pro would handle that

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post #1844 of 1989 Old 04-23-2018, 08:16 PM
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NEW WEBSITE IS UP!

https://www.d-sonic.com/



Lookin' good!
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7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1845 of 1989 Old 04-29-2018, 08:40 PM
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Looks like the 3-channel amp has been discontinued.....??

7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1846 of 1989 Old 04-29-2018, 10:26 PM
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Originally Posted by Jonas2 View Post
Looks like the 3-channel amp has been discontinued.....??
No, just not listed.

Use contact to get prices/specs on available configurations.
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post #1847 of 1989 Old 04-30-2018, 09:21 AM
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No, just not listed.

Use contact to get prices/specs on available configurations.
Huh. Wonder why?

7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1848 of 1989 Old 04-30-2018, 01:00 PM
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Huh. Wonder why?
Likely just an oversight. Dennis can make any configuration one desires, not just what is listed on the site.

I just received a M3a-2800-7 that Dennis converted from a M3-2400-6 I purchased on the classifieds.

Now I have the M3a-2800-7 & 2000-5. My OCD would prefer to have to 2400-6s but 5s and 7s should be easier to resell if need be.

I'm moving to active LCRs so I really don't need my M3a-600Ms anymore.
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post #1849 of 1989 Old 05-03-2018, 02:20 PM
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Quote:
Originally Posted by Marc Alexander View Post
Likely just an oversight. Dennis can make any configuration one desires, not just what is listed on the site.

I just received a M3a-2800-7 that Dennis converted from a M3-2400-6 I purchased on the classifieds.

Now I have the M3a-2800-7 & 2000-5. My OCD would prefer to have to 2400-6s but 5s and 7s should be easier to resell if need be.

I'm moving to active LCRs so I really don't need my M3a-600Ms anymore.
What speakers are you using with them?
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post #1850 of 1989 Old 07-01-2018, 12:41 PM
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D-Sonic Update

Hello All, thought it was time for an update.

1) I do have custom rack shelves. 16GA steel, vent holes, powder coated chassis grey, very stable. Each kit comes with low-profile 3U feet and mounting hardware. There is no shipping charge if ordered with the multi-channel chassis amplifier.
2) Ostrey93 chose the Sanders Magtech. I have a customer's Magtech right now and am very impressed with it. Sonically, from the midrange up it is very close to the D-Sonic and I likely could not tell the difference in a blind test. I give D-Sonic the edge on bass extension and control due to 3x the damping factor. Also less than half the price and weight. Maybe Ostrey's girl friend had it right the first time .
3) XLR grounding: Marc Alexander is correct in post #1837 . The shield ground should tie to pin 4 on the input board connector and should float (no connection) on the XLR end. Pin 1 on this input board connector is labeled S GND. This stands for SIGNAL ground, not SHIELD ground. Both grounds tie together at 3 control points.
4) I only have 6 of the older style 3 channel chassis left. 3x400w was the maximum power in that chassis. I will use the multi-channel chassis for all 3-7 channel models after these are gone.
5) I am designing some new, lower powered models using smaller modules in the 250-500w power class. I propose to put 2 channels in my present mono size chassis, 4 channels into the stereo and 11 channels into the large multi. This will take a few months to get custom inputs and metal work.

Happy Sonics,

Dennis
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post #1851 of 1989 Old 07-01-2018, 02:28 PM
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Quote:
Originally Posted by dsonic View Post
Hello All, thought it was time for an update.

1) I do have custom rack shelves. 16GA steel, vent holes, powder coated chassis grey, very stable. Each kit comes with low-profile 3U feet and mounting hardware. There is no shipping charge if ordered with the multi-channel chassis amplifier.
2) Ostrey93 chose the Sanders Magtech. I have a customer's Magtech right now and am very impressed with it. Sonically, from the midrange up it is very close to the D-Sonic and I likely could not tell the difference in a blind test. I give D-Sonic the edge on bass extension and control due to 3x the damping factor. Also less than half the price and weight. Maybe Ostrey's girl friend had it right the first time .
3) XLR grounding: Marc Alexander is correct in post #1837 . The shield ground should tie to pin 4 on the input board connector and should float (no connection) on the XLR end. Pin 1 on this input board connector is labeled S GND. This stands for SIGNAL ground, not SHIELD ground. Both grounds tie together at 3 control points.
4) I only have 6 of the older style 3 channel chassis left. 3x400w was the maximum power in that chassis. I will use the multi-channel chassis for all 3-7 channel models after these are gone.
5) I am designing some new, lower powered models using smaller modules in the 250-500w power class. I propose to put 2 channels in my present mono size chassis, 4 channels into the stereo and 11 channels into the large multi. This will take a few months to get custom inputs and metal work.

Happy Sonics,

Dennis

Thanks for the updates Dennis! Can't wait to see the new 11-channel monster!
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7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1852 of 1989 Old 07-01-2018, 05:20 PM
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Quote:
Originally Posted by dsonic View Post
Hello All, thought it was time for an update.

1) I do have custom rack shelves. 16GA steel, vent holes, powder coated chassis grey, very stable. Each kit comes with low-profile 3U feet and mounting hardware. There is no shipping charge if ordered with the multi-channel chassis amplifier.
2) Ostrey93 chose the Sanders Magtech. I have a customer's Magtech right now and am very impressed with it. Sonically, from the midrange up it is very close to the D-Sonic and I likely could not tell the difference in a blind test. I give D-Sonic the edge on bass extension and control due to 3x the damping factor. Also less than half the price and weight. Maybe Ostrey's girl friend had it right the first time .
3) XLR grounding: Marc Alexander is correct in post #1837 . The shield ground should tie to pin 4 on the input board connector and should float (no connection) on the XLR end. Pin 1 on this input board connector is labeled S GND. This stands for SIGNAL ground, not SHIELD ground. Both grounds tie together at 3 control points.
4) I only have 6 of the older style 3 channel chassis left. 3x400w was the maximum power in that chassis. I will use the multi-channel chassis for all 3-7 channel models after these are gone.
5) I am designing some new, lower powered models using smaller modules in the 250-500w power class. I propose to put 2 channels in my present mono size chassis, 4 channels into the stereo and 11 channels into the large multi. This will take a few months to get custom inputs and metal work.

Happy Sonics,

Dennis
Hi Dennis - are you able to give more details on the 11 channel you are working on? is it 250x11?

this thing sounds like exactly what i’ve been looking for, a high powered one box solution to do 7.x.4

(finally got a new, deeper stand that can fit bigger amps...)

Selling in AVS classifieds
FS: McIntosh MX-160 Processor
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post #1853 of 1989 Old 07-02-2018, 02:11 PM
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Originally Posted by madhuski View Post
Hi Dennis - are you able to give more details on the 11 channel you are working on? is it 250x11?

this thing sounds like exactly what i’ve been looking for, a high powered one box solution to do 7.x.4

(finally got a new, deeper stand that can fit bigger amps...)
I am proposing two models:

1) M3as-2750-11, 11x250w/8 ohm
2) M3as-3250-11, 9x250w, 2x500w - a 500w center channel could be an option on this model.

D
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post #1854 of 1989 Old 07-02-2018, 02:13 PM
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Quote:
Originally Posted by dsonic View Post
I am proposing two models:

1) M3as-2750-11, 11x250w/8 ohm
2) M3as-3250-11, 9x250w, 2x500w - a 500w center channel could be an option on this model.

D
and sorry - should have asked earlier, but I’m
assuming you could do a 9 channel version as well? (for the 5.x.4 guys...)

and idea yet cost and general eta?

Selling in AVS classifieds
FS: McIntosh MX-160 Processor
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post #1855 of 1989 Old 07-03-2018, 06:31 AM
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Quote:
Originally Posted by madhuski View Post
and sorry - should have asked earlier, but I’m
assuming you could do a 9 channel version as well? (for the 5.x.4 guys...)

and idea yet cost and general eta?
Yes, many custom builds would be available including the 5+4 nine channel.

Pricing for the 11 channel M3as series should be close to the 7 channel M3a series.

D
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post #1856 of 1989 Old 07-03-2018, 05:59 PM
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Pricing for the 11 channel M3as series should be close to the 7 channel M3a series.
Wow, that is aggressive pricing for 11 channels!!

What does the "s" stand for in M3as?
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7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1857 of 1989 Old 07-04-2018, 11:10 AM
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@dsonic

Bridging not possible on any of your amps?
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post #1858 of 1989 Old 07-04-2018, 04:05 PM
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Originally Posted by laserjock II View Post
@dsonic

Bridging not possible on any of your amps?

Not sure how often Dennis checks the forums - I'd give him a direct shout out on the phone or email!

7.2.4 System: Display: Sony XBR-65X930D; Processing: Anthem AVM60
Mains:
Paradigm Prestige 85F and 55C; Side / Rear Surrounds: Totem Acoustic Tribe III / Tribe I; Amplification: D-Sonic M3a-2800-7 (7ch. x 400w)
ATMOS:
Definitive Technology DI8R; Amplification: Class D Audio SDS-470C (4ch. x 300w)
Subwoofers:
2 x SVS-SB13Ultras; Media: Oppo UDP-203, Pioneer CLD-59
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post #1859 of 1989 Old 07-04-2018, 06:30 PM
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Originally Posted by Jonas2 View Post
Wow, that is aggressive pricing for 11 channels!!

What does the "s" stand for in M3as?
The "s" references an internal part that is unique to the new series. Some of the numeric designations will be the same for these new models as they are for the M3a series so an alpha addition acts as a unique separator for each serial number.
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post #1860 of 1989 Old 07-04-2018, 06:32 PM
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Originally Posted by laserjock II View Post
@dsonic

Bridging not possible on any of your amps?
No customer bridging for the assembled amplifier. Internal bridging is possible with some models and I do so for various upgrades.
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