2. speakers
  3. 1436727713

REL Subwoofers, Class D Amps and Neutrik Cables.

I have a Rel 505 and just purchased a a Peachtree grand integrated amplifier which is a class d amp. Unfortunately the Negative speaker terminals on D amps in which the neutrik cable connects to are not a ground which could cause damage to the amplifier. I contacted Sumiko (Rel) and they confirmed this. It sound the like best solution would be to use a neutrik cable that has "Caps" on the black wire or something. I've seen them selling on Audiogon A few years ago but not lately as Rel's new subs do not have the issue. Does anyone have any knowledge of this or has anyone seen seen this type of cable anywhere lately?
puffbojie
almarg's avatar
Ag insider logo xs@2x
almarg
9,670 posts
 
Kijanki, thanks. Your expertise on Class D is always valuable.

Rick, as a point of information REL usually recommends that if a single sub is being connected to monoblock amps it is usually best to connect the black wire to a ground point on the preamp. Ideally, IMO, to a circuit ground point such as an RCA shell, but preamp chassis might work just as well, depending on the specific design.

Also, since your Simaudio's are Class AB, the DC offset issue that has been discussed isn't a concern in your case.

Regards,
-- Al
shoff
133 posts
 
I have a REL G2. I tried connecting it to my McCormack DNA 500 amp in the "standard" manner. It got so hot it shut down my amp. I then determined the DNA 500 is a "differential" amp. I then connected as per REL's instructions for Class D and Differential amps. Simply find a screw on the back of your Peachtree, unloosen it, slip the spade of the black wire into place and retighten the screw. This will ground the connection and should solve any problems.
coxhaus
231 posts
 
I have a pair REL Studio III connected to a pair of monoblock Spectron Class D amps. The Spectron amps are running as differential amps since they are bridged so the hook up is a little different but I don't use the black wire.
More to discover