Boss od-1

[Chickenwings]

Got a line on a good price for one. I have a distant memory of people saying back in the early 90s that od-1s sound better than sd-1s but thats about as far as it goes.
Any love for the old two knob pedals? Or should i just get another sd-1 and not feel bad if i want to do some mods.

For some reason i'm a bit obsessed with old boss pedals atm. Maybe its because i have been so happy with my cs-2
Maybe its because i have two fulldrives and dont need both. Maybe its because they are so darn big.

 

[ehdwuld]

Re: Boss od-1

ok I have seen OD-1's on GC used for about $29
so if you have a good deal on one
then I would suppose it is less than that
which would mean that its a no-brainer to grab it and try it
and toss it to the corner if its not the one you remember

 

[ehdwuld]

Re: Boss od-1

ok just looked apparently the OD1 is some bootiquey Boss
I stand corrected

 

[Chickenwings]

Re: Boss od-1

lol noone corrected you!
Still the one i'm talking about is the old one that was around before the sd-1 came out with the tone control. I think the od-1 even predates the tube screamer.
Not the newish jfet based od-3 and not the newish od-1x

 

[MetalManiac]

Re: Boss od-1

yes, I own one. That's one of the seminal overdrives for 70's classic and hard rock, and it predates the Screamer.Lots of vintage recordings utilized that pedal.Essential for any Marshall JCM800 player interested in the original classic tones.

The OD-1 is still relatively cheap compared to Yngwies beloved Gray box Dod 250 , which another is historic/classic vintage OD of the era.

The clipping is something like symmetrical vs. asymmetrical of the TS808 or something like that.

Get it of you can get a good deal.

It's weird, but I do not ever see any clones of that pedal?

 

[Chickenwings]

Re: Boss od-1

Doing some searching i've found a couple of clones from small guys but apparently there is some now long lost quad opamp that boss stopped using pretty early on and changed to the 8 pin there are no clones for the original quad chip pedal. I imagine the pedal im looking at is not the "holy grail" quad chip thing but probably a regular 8 pin version. Im looking at the schematics and that od-1 looks to be the same as an sd-1 but with no adjustable tone circuit.
Maybe ill just buy it and if its is not the ducks nuts then secretly mod c3 for little more low end (ala fulldrive) and not tell anyone so i don't get into trouble with collectors! lol

 

[DankStar]

Re: Boss od-1

They can put a man on the moon but they can't make a clone of a two knob boss pedal

 

[MetalManiac]

Re: Boss od-1

Doing some searching i've found a couple of clones from small guys but apparently there is some now long lost quad opamp that boss stopped using pretty early on and changed to the 4558 there are no clones for the original quad chip pedal. I imagine the pedal im looking at is not the "holy grail" quad chip thing but probably a regular 4558 version. Im looking at the schematics and that od-1 looks to be the same as an sd-1 ut with no tone circuit.
Maybe ill just buy it and then secretly mod c3 and not tell anyone so i don't get into trouble with collectors! lol

God, mine probably isn't the original 'quad chip' either ( even though i forked over wads of cash for it)...thanks for ruining my life.

...yep, the chip on mine is a NEC c4558c;







so a SD-1 can be modified to a 4558 chip OD-1?

 

[Chickenwings]

Re: Boss od-1

More or less, but you'd probably have to disconnect the tone circuit as well as swapping some components.
FWIW Jerry i bought the OD-1 in question. Chances are its prolly the same as yours and i'm happy with that. YOu were happy with yours until you looked inside! lol Dont worry be happy!
To be honest im quite sure that an sd-1 can be modded to sound the same or better or even completely different for very little in the way of coin, but i kinda want the old pedal cos the two knobber looks so cool!

 

[JeffB]

Re: Boss od-1

The original chip is a 14pin Reticon, according to pedalarea.com

I do know I preferred my buddy's OD1 over the SD1, it was more...organic. But I did get alot of mileage out of my SD1 too.

 

[ErikH]

Boss od-1

Yes, a 4558 SD1 can be modded to a 4558 OD1. I've done it several times and even compared the schematics side by side. I went component by component through it and noted the differences and what to change or remove. It's fairly simple. I actually have it all documented in a PDF.

The old 14-pin chip version is the one that is most desirable and can catch a pretty penny these days.

 

[Gearjoneser]

Re: Boss od-1

Glad I saw this thread. The OD-1 is far superior to the SD-1, and it's because of that chip. It melds into the natural gain on your amp in a way that's very natural sounding, compared to the SD-1. Everyone using an OD-1 hated the fact it didn't have a tone control, so when the SD-1 came out everyone bought one. Most people sold their OD-1, like me, only to find that the new pedal with a tone control came with a new chip that ruined the sound of the pedal.

Players who love their SD-1 only like it because they never heard the OD-1. For nostalgia reasons, I'd love to find a minty old OD-1, but I don't feel compelled since there's so many new OD pedals that have it beat.......well, not beat, but thicker sounding.

OD-1's do the same trick as a Tube Screamer, although they're different circuits.

 

[Aceman]

Re: Boss od-1

Great pedal. Wish I had one.

It's kinda in the same zone as a Maxon Organix Overdrive, except maybe with a different EQ mojo. (Maxon Organic OD is a GOD-pedal, IMO, if that's what you are into)

 

[Chickenwings]

Re: Boss od-1

I found this while looking around in the net. Straight from the mouth of Analog Mike:
Analogmans 0d-1 mod:
The older OD1s with the quad op amp were MUCH better sounding. You can get 90% of their tone on the newer OD1s with the following mod:

C1 C6 and C7 .047 -> .1
C2 .0047 -> .047

I have also removed the dual opamp and installed a quad but VERY difficult as they are in upside down and several traces need to be redone, and several bias resistors need to be removed or changed to run the op amp. The chip change did not help as much as the cap change.

have fun!
http://www.diystompboxes.com/smfforum/index.php?topic=27356.20

 

[MetalManiac]

Re: Boss od-1

Glad I saw this thread. The OD-1 is far superior to the SD-1, and it's because of that chip. It melds into the natural gain on your amp in a way that's very natural sounding, compared to the SD-1. Everyone using an OD-1 hated the fact it didn't have a tone control, so when the SD-1 came out everyone bought one. Most people sold their OD-1, like me, only to find that the new pedal with a tone control came with a new chip that ruined the sound of the pedal.

Players who love their SD-1 only like it because they never heard the OD-1. For nostalgia reasons, I'd love to find a minty old OD-1, but I don't feel compelled since there's so many new OD pedals that have it beat.......well, not beat, but thicker sounding.

OD-1's do the same trick as a Tube Screamer, although they're different circuits.

Read this;


https://www.google.com/url?sa=t&rct...=NZc6TbjNP3xNA0Ku8Ee2KQ&bvm=bv.98717601,d.eXY


I'm not so sure what you mean. Do you mean you had the original 12 pin OD-1 chip, because some fo the early SD-1's had the rare C4558c chip( like the one I have) and also the rare old diodes.
Maybe of, depending on what OD-1 you had, and what SD-1 you had, it was a matter of the circuit changes and not the chip, unless you had one of the scarce 12 pin OD-1 chips that have been mentioned, and/or the SD-1 you bought had the common jr4558'd' and the newer blue stripe diodes mentioned in the article I linked. I'm befuddled.

 

[MetalManiac]

Re: Boss od-1

I found this while looking around in the net. Straight from the mouth of Analog Mike:
Analogmans 0d-1 mod:
The older OD1s with the quad op amp were MUCH better sounding. You can get 90% of their tone on the newer OD1s with the following mod:

C1 C6 and C7 .047 -> .1
C2 .0047 -> .047

I have also removed the dual opamp and installed a quad but VERY difficult as they are in upside down and several traces need to be redone, and several bias resistors need to be removed or changed to run the op amp. The chip change did not help as much as the cap change.

have fun!
http://www.diystompboxes.com/smfforum/index.php?topic=27356.20

grate poste! Gude wurke!

 

[ErikH]

Re: Boss od-1

I found this while looking around in the net. Straight from the mouth of Analog Mike:
Analogmans 0d-1 mod:
The older OD1s with the quad op amp were MUCH better sounding. You can get 90% of their tone on the newer OD1s with the following mod:

C1 C6 and C7 .047 -> .1
C2 .0047 -> .047

I have also removed the dual opamp and installed a quad but VERY difficult as they are in upside down and several traces need to be redone, and several bias resistors need to be removed or changed to run the op amp. The chip change did not help as much as the cap change.

have fun!
http://www.diystompboxes.com/smfforum/index.php?topic=27356.20

I came across this as well several years ago when I was working in my conversion. Really helpful. I reference this stuff in my conversion notes as well so I don't forget.

The OD-1 (8-pin chip version), SD-1 and Tubescreamer are the same circuit design with part value differences being the the main thing and with the OD-1 utilizing the inverting opamp input and the other two use the non-inverting input.

While the 14-pin version is more desirable, the 8-pin is more common as it was in production a lot longer.

When I have some more time on my hands I'd like to do another conversion.

 

[DrNewcenstein]

Re: Boss od-1

Aside from "because everyone says so" is there any hard evidence that these changes had as dramatic an effect as is always reported? I've seen these same old arguments for years as justification for the inflation of prices on old pedals, from BOSS to the Whammy, it's always the same: they changed something in the circuit and some intangible element was removed.

Where's the science? Where are the unbiased, not-tweaked-to-reinforce-one-man's-opinion audio clips? I find it difficult to believe that electrical engineers building audio devices were going simply by end-result oscilloscope readings with no concern for the audible portion, especially since Roland had in-house players to test these things and would have reported that the new revision sounds drastically different.

 

[Chickenwings]

Re: Boss od-1

Aside from "because everyone says so" is there any hard evidence that these changes had as dramatic an effect as is always reported? I've seen these same old arguments for years as justification for the inflation of prices on old pedals, from BOSS to the Whammy, it's always the same: they changed something in the circuit and some intangible element was removed.

Where's the science? Where are the unbiased, not-tweaked-to-reinforce-one-man's-opinion audio clips? I find it difficult to believe that electrical engineers building audio devices were going simply by end-result oscilloscope readings with no concern for the audible portion, especially since Roland had in-house players to test these things and would have reported that the new revision sounds drastically different.

To be honest im quite sure that an sd-1 can be modded to sound the same or better or even completely different for very little in the way of coin, but i kinda want the old pedal cos the two knobber looks so cool!

 

[DrNewcenstein]

Re: Boss od-1

And that's pretty much what I expected.