Rev 8's hissing help??

[PKKup]

So, I went with rev 8's on the tower and wetsounds amp. They are hissing just on battery and under slight load. Once going or at higher volume it seems to go down or away. Could just be drowning out. My marina thinks a filter will do the trick. Any thoughts? Lot of $ for this to be happening. But, they are insanely loud from what I heard from them so far. Thanks!

[David Analog]

So, I went with rev 8's on the tower and wetsounds amp. They are hissing just on battery and under slight load. Once going or at higher volume it seems to go down or away. Could just be drowning out. My marina thinks a filter will do the trick. Any thoughts? Lot of $ for this to be happening. But, they are insanely loud from what I heard from them so far. Thanks!

Speakers don't hiss. They just reproduce what the electronics deliver.
The level of the hiss is the same at all levels. Yes, it gets masked when the volume is increased or you are underway.
It's not an issue that is remedied by a filter.
You are going to have some small level of hiss with such a sensitive speaker. If the hiss is a major distraction then the gains are too high and the system needs to be re-tuned.

[nyryan2001]

PK- I assume you dont have a line driver or an EQ?

Easiest wave to fix/reduce hiss is to throw a $100 line driver to ramp up the pre-amp volts being fed to your amps... will allow you lower your gains on your amp and keep the noise lower.

Put one like this right before the amp that feeds your Revs, very simple, you can even tamp the + / - and REM off the amp lugs, we are talking 5 min install.

http://www.arcaudio.com/p/ald?pp=24

or, if you are feeling froggy, and want much more control to be able to fade better between tower, inboats and sub, look into a WS420sq or the new Exile ZLD in the $300-$400 range with the RCAs. These ramp up the pre amp volts to all your amps. A bit harder install, as you gotta run RCAs all the way over the the helm, and find good power and REM turn on.... 1-3hr install

[pe4me]

I hope this is related, and since I had hissing as described in my WS systems in the past I find this interesting. I am only a sound snob and know enough to get in trouble about electronics. Anyway, I have read and heard that the WS 420 was the source of more hissing and was possibly the root of issues that people were having?
All of the above makes perfect sense, but I am curious that I am now reading a WS420 will HELP with hissing.
I am eyeing a BT version and if OP is looking to rid hissing I am even more keen to put that extra $400 into the system straight away.

[MLA]

pe4me,

Ive been installing the WS-420 since its original release. The 1st gen units had adjustable gain levels. This made it REAL easy to get that unwanted gain hiss. But on the hand, that didnt mean the system was destined to have unwanted noise. The new SQ version is back to adjustable gain level settings, but the internals are so much better. Its tougher to get gain hiss from the EQ itself, but you can still get amp gains too high and you still need to avoid that roller coaster gain level. In closing, I do agree that there are benefits to a line driver, but its not really the fix. Properly setting the gains is the fix, with or without an EQ/line driver.

[PKKup]

Thank u, I'll play with gain first. Any special setting or a trail and error? Hopefully it stops the HISSING.

[RacingSims]

any luck?

[pe4me]

Tuning out the hiss. The audiophiles out there and OP, I have another caveat to the hissing. What if you listen to a wide range of music and have different quality downloads? I have some less than good rips/downloads and can easily go from George Strait to Godsmack. I seemed to always get the sweet spot and then you fire up the Jay-Z/Biggy and you running to adjust settings to not blow anything. And alcohol to you buddies and the volume goes up. I maybe alone here, but the it seems when "tuning" I end up having to turn everything low enough for the lows, then have to crank the volume for the crappy quality songs, hear the hissing and then hope the next song isn't too far off... I realize some of this is download/QC issue, but between genres it seems difficult to strike a balance when tuning my electronics.
Anyway, cant wait to install the Rev 10s, Syn 4 and WS420BT. Truly hope I can install it clean enough to avoid the HISSSSSS on my 2 grand splurge!
KUP keep us in the loop if you learn anything-

[PKKup]

I agree the song makes a difference. Once it cranked you definitely do not hear the hiss. It's more when lounging. We dialed back gain a bit, that helped. Should have filter next week. I refuse anything less than clear ! My number is the same, way too much $ not to be great at all levels. I'm going to try USB tmrw, have a feeling the BT isn't helping.

[David Analog]

The horn tweeters in an HLCD tower speaker are typically 10dB more sensitive than the dome tweeter in an in-boat coaxial. So that isautomatically ten times the hiss power level and two to three times the audiblelevel. With an HLCD tower speaker it is like being directly in front of aspeaker array at a rock concert. You’ll clearly hear hiss in that position….atleast for the first 10 minutes. You’ll note that when fading to the in-boatspeakers that same hiss is far less audible. This is something that you mustreconcile with a tower speaker system that is designed to play loud at 80 feetbecause the byproduct is that it ruthlessly reproduces everything. It’s notselective.

Having said that, a great majority of the time the hisslevel can be managed to a tolerable level with the right execution in severalphases of the installation set-up and system tuning.
Rarely does adding another electronic component to thesignal chain reduce the hiss. In fact, the hiss level is generally increasedwith each additional gain stage and that would include an EQ. But if set up correctlythe noise increase is too minimal to be a distraction. There are cases wherethe voltage level somewhere in the signal path is so small that it places aninordinate responsibility to increase gain on the following component stage whichis definitely a prescription for noise. Gain should be high with a progressive one-wayreduction or consistent throughout the signal path and not on a roller coasterride. A line driver occasionally helps and in the right scenario can be asignificant improvement.
Since true hiss, if diagnosed correctly, is in the signaland not in the ground shield or supply power, an external noise filter cannotcorrect it because there is no noise filter that works on the center conductor signalunless it is a noise gate processor or something crazy sophisticated like that.If an external filter would help then the noise isn’t hiss.
Odin with Earmark Marine has been a soundengineer for a local Texas club and sets up the sound for hundreds of differentacts (that’s a REAL challenge), not to mention his considerable experience inautomotive and marine audio. He knows gain structure and all the land mines aswell as any pro I’ve met. He is a great equipment resource based on his abilityto guide his customers through issues such as this.

[RacingSims]

The hiss or Humm that I am now hearing after the install is with all the gains at the lowest setting. I am using 2 HT6 wetsounds amps. (1 HT6 for the 6 in boat JL Mx650 and 1 HT6 bridged for the tower and sub) Also using a WS 420 SQ. How is everyone else doing removing the annoying sound. I also purchased rev 8's however have not installed them as i still have the roswell 7.0 hooked up.

Btw remote ground and power are connected to the 4 pin nautique harness behind the head unit.

[PKKup]

I really appreciate all the feedback. It's still hissing. It really seems like a ground, but what do I know. Any chance the LEDs in the rev 8's could cause interference ?

[PKKup]

Thak you! I think this might be our next step. Guy is hopefully coming tmrw to try again. So, frustrating! I refuse to have this situation something I just live with.

PK- I assume you dont have a line driver or an EQ?




Easiest wave to fix/reduce hiss is to throw a $100 line driver to ramp up the pre-amp volts being fed to your amps... will allow you lower your gains on your amp and keep the noise lower.

Put one like this right before the amp that feeds your Revs, very simple, you can even tamp the + / - and REM off the amp lugs, we are talking 5 min install.

http://www.arcaudio.com/p/ald?pp=24

or, if you are feeling froggy, and want much more control to be able to fade better between tower, inboats and sub, look into a WS420sq or the new Exile ZLD in the $300-$400 range with the RCAs. These ramp up the pre amp volts to all your amps. A bit harder install, as you gotta run RCAs all the way over the the helm, and find good power and REM turn on.... 1-3hr install

[PKKup]

Nope!

any luck?

[MLA]

I really appreciate all the feedback. It's still hissing. It really seems like a ground, but what do I know. Any chance the LEDs in the rev 8's could cause interference ?

I have heard a whine being introduced into the speakers with RGB LEDs, by some RGB controllers, but not a his.