The constant power/memory wire is hooked up directly to a main always on positive connection directly connecting to the battery. I have the power wire to my HU hooked up to my ignition so that it only turns on when I have my key in the "on" position. It's a little box that takes both sets of speaker wires from the components and runs 1 set to the amp from each box. So I put back to 1/4 because the bass is so overpowering.Ĭrossover modules? Sorry for being a noob, but I don't believe I have any crossovers that I know of, unless that is the device that is sending the signal from the components to the amp. Even with the gain set to 0 it still hisses. I have the gain set to 1/4 turn right now. I made sure to go extra large on the grinding of the paint to make sure that it was a solid ground. The grounds are going to a body bolt and have been sanded/grinded with a dremel. Just got the box and sub hooked up today. I haven't had a chance to test your recommendations. Posted on Thursday, Aug02:15 GMTThank you Joe and Glass. Power and signal can be together, as the lower the volume, the lower the current draw, thus you won't have enough current to produce noise that would be audible over the sound of the stereo itself, however crossovers, due to the capacitors and chokes, and ignition systems due to the high current and the plugs or coil packs, will induce noise. crossovers and ignition system wiring are the two things most often guilty of injecting noise into your system. Next, be sure that none of your signal path lines are running anywhere near the crossover modules for the components. In your case, I'd make sure everything has a solid chassis ground to sanded bare metal, not to a seat bolt, or painted chassis point, and make sure all connections are tight and secure. However, in the mean time, this is either most commonly caused by a ground loop, RFI, or the amp gain being set too high.
Posted on Tuesday, Aug20:30 GMTI have some FAQs written for this sort of thing at Is there anything I can do? I don't mind it so much as when I turn it up, the speakers sound fine and the hiss isn't audible at higher volume. The speakers are setup bridged on the amp. I have it on AP, 0dB punch bass, rear gain is set to 1/4 turn. I believe the gain is the only thing I've messed with. Amp set to 0 gain or a quarter of a turn, still same hiss. Tested with loud on/off, still same hissing. The hissing does not increase when volume is increased. Volume all the way to 0, doesn't make a difference. I'm getting a hissing sound through my set of Infinity Component speakers. I have a JVC RX-888 receiver, Paradigm Titans for surrounds. Which basically means to me, that power is being sent to the speakers. I've been listening/testing my components and trying to tweak the amps for optimal settings. The hiss is only present when the receiver is in 'Surround' mode. I'm still waiting on the box for my sub, but I have all the wiring ready to go.
I've got pretty much the whole setup ready to go. The problem is now isolated to the Marantz being the sole culprit.Posted on Saturday, Aug23:34 GMTHello again.
Turn it on-it should be at a low speaker volume as you already confirmed you have turned down the Oppo volume and are using the Oppo as a preamp instead of the Marantz. Now plug the oppo directly into your power amp using the front left right rca inputs directly from the Oppo to the Outlaw power amp, bypassing the Marantz completely. Verify the output volume in the Oppo is turned down low by listening first to the headphones to confirm this. Then using your digital volume control on the Oppo turn those RCAs way way down.
SPEAKER HISS FULL
On that Opp the digital volume control runs the Oppo RCA outputs-it will not control the Oppo HDMI output volume so that is why you need to use the RCAs and unplug the HDMI which is full blast all the time. It simply can NOT be anything the power amp is doing.Īnd one more check would be to unhook the Oppo HDMI connection to your Marantz and run only analog RCA into the Marantz from the Oppo. This helps point to the pre-pro as being in need of service. Is it still doing exactly the same things but through headphones? Turn off the Outlaw power amp and unplug all the XLR cables to your power amp so it is off line completely. Take your Grado phones and plug them into the Marantz pre-pro. Here's an idea to pinpoint things a bit better. They are too late in the circuit to be affecting the hiss. This makes the pre-pro react with noise that otherwise would be shunted to ground.įorget about the power section and those XLRs. I'm guessing something at the first stage of preamplification is running "open" with no way to drain off capacitively, perhaps a defective resistor trace on the board. Sounds like your Marantz is due for servicing.
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