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#96274 - 01/26/17 05:52 AM Common Ground
Stephen B Offline
Gunslinger

Registered: 01/15/15
Posts: 201
Loc: East Texas
Could someone tell me if the RR2150 common ground? If not would a jumper across the negative speaker out posts be an issue?

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#96275 - 01/26/17 06:30 AM Re: Common Ground [Re: Stephen B]
XenonMan Offline
Desperado

Registered: 04/08/08
Posts: 2383
Loc: Columbus,North Carolina
Why would you want to jumper the negative speaker posts? The 2150 itself is grounded through the neutral via its own power cord but the power that goes from the amplifier circuit to the speakers is likely a different path and not the same ground plane.
_________________________
Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner

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#96276 - 01/26/17 07:32 AM Re: Common Ground [Re: Stephen B]
Helson Offline
Gunslinger

Registered: 03/21/12
Posts: 136
Loc: USA
They should be. If you have an ohm meter you could check continuity with the phono ground.
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#96277 - 01/26/17 12:14 PM Re: Common Ground [Re: Stephen B]
Stephen B Offline
Gunslinger

Registered: 01/15/15
Posts: 201
Loc: East Texas
Hi Xenon. This would be running a pair of Polk Audio SDA's and must be common ground. My Adcom GFA-585LE is common ground but not zero resistance common ground so requires the use of a jumper across the speaker out negative posts.

Thanks for the reply Helson. I am hoping someone who has one can check for me or maybe one of the Outlaws might chimb in.

Paging Ben to the Bat Phone.

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#96278 - 01/26/17 05:38 PM Re: Common Ground [Re: Stephen B]
XenonMan Offline
Desperado

Registered: 04/08/08
Posts: 2383
Loc: Columbus,North Carolina
I have seen the SDA interconnect cable but it is designed to connect to the speaker with a specific connection which is separate than the speaker terminals themselves. I am sure Outlaw Ben will be able to answer the common ground question.
_________________________
Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner

Top
#96279 - 01/26/17 07:36 PM Re: Common Ground [Re: Stephen B]
Stephen B Offline
Gunslinger

Registered: 01/15/15
Posts: 201
Loc: East Texas
Yes, the interconnect cable runs between the two speakers. The idea was to transfer a portion of the signal from one cabinet to the dimentional driver in the other cabinet to correct crosstalk.

The system works quite well in my opinion but comes with specific requirements for powering the beasties. Later SDA models came with an AI 1 isolation transformer which could then use non common ground amps or monoblocks.

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