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 Help me with increased hiss and buzz when using effects on OD Channels

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sonofhud



Posts: 5
Join date: 2011-10-02

PostSubject: Help me with increased hiss and buzz when using effects on OD Channels   Mon Nov 07, 2011 10:28 am

Hi Its Jason here and I'm new to the forum.

I have an amazing HT100 and love it to pieces. I am using the amp as is but when I pass any effects through the input straight in, I end up with
extra hiss and buzz that is not there when using the amp straight.

If I use any delay, flanger or compression using single pedals from my BOSS board then this happens.

I have used the pedals individually with batteries and this still happens so I guess its not anything to do with the BOSS power supply causing inteference.

I am about to upgrade to a BOSS GT10 that I owned previously but don want to shell out the cash for one if the unit is likely to cause any similar problems.

Does anyone know if this is as expected, but these effcts are clean and going in through the front surely wouldn't cause a problem.

I have tried a couple of HT100 heads with this config and both produced the same results, so its NOT a faulty kit.

Please help
Cheers

JASON :-)
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majikmojo



Posts: 1106
Join date: 2011-03-21
Location: hollywood florida

PostSubject: re   Mon Nov 07, 2011 12:39 pm

welcome Jason...i have no issues running my board in front on my stage 60 - its pefectly quiet unless both the amp and pedals are turned waaaaay up....


Types and Causes of Noise

Guitar rigs are susceptible to 3 types of noise, each with a different cause:

HUM . A low pitched, smooth bass tone (60Hz).
If it does go away when you turn the ax down, you are probably using single coil pickups and standing too close to a power transformer in an amp.
If it does not go away when your turn the guitar down, it is caused by:
A ground loop in your rig, and can be fixed
A cheap power supply. Get a good "audio" supply or a wall wart from Boss, Dunlop, etc.
An overloaded supply. Remove some pedals from the power-chain

BUZZ . Similar to Hum (from 60Hz wall power frequency), but sounds like a "buzz" instead, with a higher pitched component in the sound
If does go away when you you turn the guitar down, you are probably using single-coil pickups and getting buzz from light dimmers, neon lights, color TV's, etc. (these emit radio waves).
Try turning-off these buzz sources, or move away from them.
It may help to rewire your pickups and pots properly, and shield the cavity (the manufacturers rarely do), Stewart-MacDonald has a nice kit, and Shielding a Strat has an excellent guide for proper wiring--take it to a good tech if you don't do it yourself.
Horribly noisy wall power. Try plugging your amp into a good power strip that claims "EMI" filtering on the package

HISS . Is just what it sounds like---a high pitched "white noise".
Hiss is typically "system" noise, and does not go away when the ax is turned down.
The most common cause is high gain. Use only enough gain to get the right sound (which can be a lot sometimes).
Other than that, hiss is best reduced by getting better amps and FX pedals.

POWER SUPPLY NOISE This is like buzz, but is not always based on the 60 Hz "wall power" frequency. It is based on the switching frequency of your pedal's power supplies.
Power supplies, unless they are expensvie chassis style supplies with "toroid" transformers, can radiate noise as radio frequencies. This does not imply you need an expensive toroidal power supply, only that you shouldn't put standard power supplies right up next to your pedals and cables. When moved to a safe distance, there is no difference in noise between the expensive supplies and the standard wall warts. They isolation and circuitry are the same, and the typical wall wart will have a higher current rating than most of the outputs provided by the expensive supply, which makes them better for power chains.
A fun experiment: Put a typical wall wart on an extension cord, and wave it around your pedals and cables while the volume is up loud on your amp. This will give you an idea of how much noise your power supplies contribute, how far away they need to be, etc.

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sonofhud



Posts: 5
Join date: 2011-10-02

PostSubject: Re: Help me with increased hiss and buzz when using effects on OD Channels   Mon Nov 07, 2011 1:15 pm

Thanks for your reply majikmojo.

I will have another look tonight and try to pin this down a bit more to determine exactly what it sounds like based on your detailed reply.

Thanks for taking the time again. Incidently, I am now just using an BOSS EQ7 into a BOSS NS3 noise gate and into the front of the amp.
Even when I switch the NS3 off and on there is still no hiss. Soon as I introduce the modulation or compressor then it starts!!!!

Cheers
JASON
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Bigsmudger



Posts: 166
Join date: 2011-05-12
Location: Bristol, England

PostSubject: Re: Help me with increased hiss and buzz when using effects on OD Channels   Tue Nov 08, 2011 9:36 am

Welcome Jason

Some pedals will cause some noise through the front of the amp.
If you put any modulation through the front of the amp, you're technically putting modulation in front of distortion
in the effects chain. Once that hits your pre amp it can cause problems. Some guys don't experience this but, as Majik said,
if your levels are up, you will get some noise. Any noise from your signal path through the front of the amp will be amplified.

I'd try this:

Wah, Tuner, Compressor and any distortion pedals up front - modulation (except Delay), eq and gate through your fx loop in that order.
You might not even need a gate with that set up. I rarely need to use mine. If you run a delay, put it last in chain or the gate will mistake the
effect for noise and kill it. I would leave the digital processors alone as well - they generally rip the heart out of your tone. I've yet to find one
I liked and believe me I've tried a few. Much better results to be had with dedicated pedals IMO.
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sonofhud



Posts: 5
Join date: 2011-10-02

PostSubject: Re: Help me with increased hiss and buzz when using effects on OD Channels   Tue Nov 08, 2011 11:47 pm

Bigsmudger you hero. I have used effects loops before but they have been pants on previous amps I have owned.

Just plugged my DD3 in there and BINGO no crap from the amp. I played it without the DD3 and was fine, then plugged it in and FINE again, then activated it and still no
hiss like previously.

The delay sounds absolutely AMAZING too. This is the sound I have been looking for and it's great to hear...................

You are right about the effects boards too, the HT100 is a fantastic machine on its own.

IM DEAD HAPPY NOW and will have fun experimenting with the rest of my gear.

Thanks for your advice and majikmojo's here and the uppercase content of this post is intentional by the way.........

Cheers
JASON
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Bigsmudger



Posts: 166
Join date: 2011-05-12
Location: Bristol, England

PostSubject: Re: Help me with increased hiss and buzz when using effects on OD Channels   Wed Nov 09, 2011 11:29 am

No worries - happy to be of assistance Smile
You pushed the loop level button in for the pedal setting?
My loop runs - Chorus, EQ, Gate, Delay. I use the EQ for volume lift on solos - just nudge the level knob up a touch.

I tried my MXR analogue delay throught the front at first. It wasn't noisy but sounded kinda harsh so tried it
last in chain through the loop and almost had to change my underpants Laughing

Enjoy playing with that amp.
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MikeD



Posts: 30
Join date: 2011-09-16
Age: 35
Location: Sweden

PostSubject: Re: Help me with increased hiss and buzz when using effects on OD Channels   Thu Jan 12, 2012 7:30 pm

man i do love this site..... have been running my korg toneworks as a volume pedal/tuner up in front and basically not using it for anything else not really thinking about it but our sound guy has been at me cause OD2 sounds really muddy.....so I put it in the loop after reading this and voila....crystal-clear
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