I've been working on this for a few days now. I purchased one of these: http://www.behringer.com/EN/Products/RV600.aspx, a Behringer RV600 Reverb Machine for a couple of quid. It's supposed to be a replica of the Line 6 Verbzilla pedal (more info on that one here: http://line6.com/tonecore/verbzilla.html) and it does a pretty good job of emulating it too. There are ton of very useful reverb tones to be had here. However, there was also 3 major problems with the stock unit:
1) The case was plastic and definitely not up to being trodden on for long!
2) The stock switching was useless. If you had trails on and the mix set below about 80% there was serious tone suck, if the mix was 100% wet and you turned the thing off it didn't pass your signal at all!
3) There was a noticable noise increase while using the pedal.
OK, so simple. A rehouse was in desperate need! I also decided to build up my own switching and mixing system around the pedal instead of trying to adapt the stock unit to perform how I wanted (It's all SMD so not ideal to take a soldering iron too!).
The switching/mixing system I designed allows you to have trails on the switching but also to true bypass the unit. I added independent wet and dry level controls and a preGain control (I used a Zvex SHO as the preamp circuit) which controls the boost of the signal before it hits the front of the 'verb. The set up I produced, with the separate wet/dry level & preGain controls in combination with a few sneaky low pass filters, allows much lower noise operation than the stock single "mix" control present on the Behringer RV600. There is no distinct increase in noise between on and bypassed!
Below you can see what I eventually produced. Controls from left to right: PreGain, Wet Level, Dry Level, Tone, Decay, Delay, Mode.
Check out the neat custom Hammerite & Jackson Pollock paint job On the left of the internal gutshot you can see my custom switching/mixing circuit. I'll be posting a schematic of my switching/mixing circuit soon so stay tuned if your going to be embarking upon any Behringer rehouses....
Next up the Behringer EM600 Echo Machine
P.S Thanks to SuperVelcroBoy for his heads up on things to look out for while rehousing Behringer stompboxes.
Behringer RV600 Reverb Machine: Bad -> Great mods.
- briggs
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Taken from my blog:
- moltenmetalburn
- Resistor Ronker
Nice workaround!
IMHO the yellow knobs are drawing too much attention away from your awesome paint job.
IMHO the yellow knobs are drawing too much attention away from your awesome paint job.
"The Humans Will Never Destroy Us"
- briggs
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- briggs
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- Ripdivot
- Resistor Ronker
"Next up the Behringer EM600 Echo Machine"
I am looking forward to seeing what you can do with the echo machine. I have one and it is not too bad but I find it noisy unless it is on its own power supply. I even shielded the inside of the plastic enclosure but it didn't help.
I am looking forward to seeing what you can do with the echo machine. I have one and it is not too bad but I find it noisy unless it is on its own power supply. I even shielded the inside of the plastic enclosure but it didn't help.
- briggs
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Any features you'd especially like to see?Ripdivot wrote:"Next up the Behringer EM600 Echo Machine"
I am looking forward to seeing what you can do with the echo machine. I have one and it is not too bad but I find it noisy unless it is on its own power supply. I even shielded the inside of the plastic enclosure but it didn't help.
- Ripdivot
- Resistor Ronker
Just for it to work on the same pwr supply as the rest of my pedals. Sometimes it will work with a shared supply but it depends on the pedals before and after it. I have the Rotary Machine as well and it is also noisy. One thing that bothers me with the behringer line 6 knock offs is how the bypass works. You step on the pedal but it doesn't switch until you release your foot. I want them to switch when you step down on them like any other pedal (boss, ibanez etc...). As for the delay itself, it sounds pretty good.briggs wrote:Any features you'd especially like to see?Ripdivot wrote:"Next up the Behringer EM600 Echo Machine"
I am looking forward to seeing what you can do with the echo machine. I have one and it is not too bad but I find it noisy unless it is on its own power supply. I even shielded the inside of the plastic enclosure but it didn't help.
- JiM
- Diode Debunker
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I heard that the original Line6 had this problem too ... they are very noisy when they share their power supply. If we find a solution for one, it should work for the other.Ripdivot wrote:Just for it to work on the same pwr supply as the rest of my pedals. Sometimes it will work with a shared supply but it depends on the pedals before and after it.
Isn't there some "hold" or tap tempo function using a long press on the footswitch ? This might explain this behaviour, as you don't want the effect to switch off when you begin tapping the tempo ... I guess it could be fixed in software or by adding some pulse-generating logic (the opposite of a latch) right after the switchRipdivot wrote:One thing that bothers me with the behringer line 6 knock offs is how the bypass works. You step on the pedal but it doesn't switch until you release your foot. I want them to switch when you step down on them like any other pedal (boss, ibanez etc...).
Btw, what is the DSP ? I can't read on the picture, but i guess there is also an Atmega16 for the knobs like in the other Behringer Boss-inspired digital pedals.
I only give negative feedback.
- briggs
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Awesome looking mod. Im new here, but I was just wondering how much of a difference you think it would make to leave out the pre-amp circuit? Is there something you can point me to that would be a good substitute for the Zvex circuit? Thanks.
- briggs
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Are you using the scheme I posted above? You can try grounding the input on switching. That may help.
Regarding a different preamp choice - you could use a standard op amp gain stage, configured to give gains from 1~10, it would work just as well I chose the SHO circuit because I'd already run out of op amps in my quad and I like the sound of it
Regarding a different preamp choice - you could use a standard op amp gain stage, configured to give gains from 1~10, it would work just as well I chose the SHO circuit because I'd already run out of op amps in my quad and I like the sound of it
Allready tried to do that (grounding the input) but no luck.
Iám using the your schematic now but i think i'll change the input buffer/pre gain circuit to an opamp stage as i like that more.
I will get back on this as i solved the problem.
Iám using the your schematic now but i think i'll change the input buffer/pre gain circuit to an opamp stage as i like that more.
I will get back on this as i solved the problem.
- briggs
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Hey Briggs! Hi all!
what about the layman in all this? I understand the switching/mixing schematic but I don't have the technical know-how to make something of it. Could anyone by any chance write a actual layout of the mod with the actual parts needed and brief run through of what goes where. Give the working musician a chance guys! I'm sure I'm not the only one looking for this! Don't let us down and spread the good word!!! ...please.... thanks!
what about the layman in all this? I understand the switching/mixing schematic but I don't have the technical know-how to make something of it. Could anyone by any chance write a actual layout of the mod with the actual parts needed and brief run through of what goes where. Give the working musician a chance guys! I'm sure I'm not the only one looking for this! Don't let us down and spread the good word!!! ...please.... thanks!
- DWBH
- Cap Cooler
One thing I didn't understand is whether you eliminated/bypassed the original buffers of the pedal.
I mean, from what I read and from the schematic, you have the original pedal, unmodded, turned always on, with the mix pot all the way up, 100% wet - then you just added the aforesaid circuitry. Correct?
I mean, from what I read and from the schematic, you have the original pedal, unmodded, turned always on, with the mix pot all the way up, 100% wet - then you just added the aforesaid circuitry. Correct?
- briggs
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