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TsunamiBr
Copper Member
Australia
4 Posts |
 Posted - 06/26/2009 : 00:26:17
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Hi everybody,
I just bought a used DD-3, and while testing I noticed it�s producing a distorted (I guess clipped) delayed sound... and it�s directly related to the input volume (if I lower the volume of the pedal before the DD-3, the distortion is gone). Is it normal? I never had a Boss delay pedal before. Thanks for any help! |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 06/26/2009 : 00:45:28
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Hi TsunamiBr and welcome!
What are you using the DD-3 for? If it is in an FX loop, it will distort if the level is too high. The D-3 is designed for guitar level signals (not exceeding about 300mV). |
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TsunamiBr
Copper Member
Australia
4 Posts |
Posted - 06/26/2009 : 00:50:55
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Hi Laurie, thanks!
No, it�s not a FX loop. It�s just a regular chain. Guitar -> Sansamp GT2 -> DD-3 -> SS amp. Weird thing is, if I replace the DD-3 for my MXR Carbon Copy, it work perfectly, no distortion, whatever volume level I put in my GT-2... |
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Laurie
Double Platinum Member
Canada
4854 Posts |
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TsunamiBr
Copper Member
Australia
4 Posts |
Posted - 06/26/2009 : 05:39:20
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It�s the latest one, the DD-3 version 3. I did a search around, but didn�t find anything, only an old thread in another site, the guy was having the same problem, and people suggested for him to change the power supply, to increase the pedal headroom... well, I�ve got a fine PSU, works fine with any other pedal, and I tried a battery, no luck...
Anybody else who have a DD-3 can tell me if this signal clipping in this pedal is a normal thing? Thanks... :/ |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 06/26/2009 : 06:08:38
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Clipping in the pedal is normal... but ONLY at high signal levels. At normal instrument leves, clipped signal is abnormal.
We've seen a couple of this version with failed output opamps, but they generally fail completely - no sound.
Some questions:
1) What sort of sound is there out of the direct out?
2) What sort of power supply are you using - manufacturer and model please.
3) Did you (or a previous owner) ever use a power supply of higher than 9V regulated, or with reversed voltage on the pedal?
4) Was your battery known to be fresh?
5) If you wind the level knob fully counterclockwise, is the sound without delays also distorted?
FYI - I probably have the most experience fixing DD-3's here, so please be patient - there is never a "quick fix" but we can probably work through this.
Do you have access to test equipment - multi-meter/scope/etc?
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Edited by - Laurie on 06/26/2009 06:11:14 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 06/26/2009 : 14:58:17
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Hi TsunamiBr
Welcome to the forum.
Laurie & TsunamiBr
quote:
Guitar -> Sansamp GT2 -> DD-3 -> SS amp.
Please keep in mind that the,
SansAmp GT2 is capable of some extremely high output levels.
have you tried backing off the level on the GT2
I own one of the older original GT2's,
& it can really push the front end of a tube amp.
Regards Dr. Bob  |
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TsunamiBr
Copper Member
Australia
4 Posts |
Posted - 06/28/2009 : 04:31:27
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Hi, thanks for your help!
Yeah, that�s right, when I roll back the volume of the GT-2 to almost zero, the clipping stops...
I got a Boss SD-1 and a GE-7 yesterday, so I could test the DD-3. So, I first tried SD1 --> DD3. SD-1 Volume max, drive zero, tune 12 o�clock. The DD-3 didn�t show any distortion, even hitting hard on my guitar.
I then tried SD1 --> GE7 --> DD3, SD-1 Volume max, drive zero, tune 12, and GE7 all flat, but output level max (15db). This time, the DD-3 did produce the distorted delay...
Laurie, sorry for not answer your questions, I�ll do, thanks anyway! |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 06/29/2009 : 14:53:28
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Do you have a way of measuring the peak-to-peak voltage going into the DD-3? The older ones will generally start distorting at about 3 volts p-p, the newer ones at a little less. Maybe the signal is just too hot.
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Distorted delay sound (DD-3). Help!!
