Amp mod, pre/post.

[Ggaa]

My Rumble 200 doesn't have a pre/post on the xlr out. Anyone know if it's even possible to add one? Simple or complex operation? Not me, job for a tech.

 

[Zooberwerx]

According to the manual, the Rumble 200 is preconfigured for post EQ / gain operation. Not sure if the "effects send" is pre or post. I think that it's safe to assume the mod suggested would be pricey if even possible. You'd be better off running a decent DI on your pedal board if "pre" is desired.

Riis

 

[Ggaa]

According to the manual, the Rumble 200 is preconfigured for post EQ / gain operation. Not sure if the "effects send" is pre or post. I think that it's safe to assume the mod suggested would be pricey if even possible. You'd be better off running a decent DI on your pedal board if "pre" is desired.

Riis

Something I saw made me think everything is post....was thinking maybe Ampeg Scrambler w/di.

 

[CallMeAl]

I’m pretty darn sure I’ve seen Rumble club members mention using DI boxes to get around that “flaw” in the Rumble’s design. I used a Rumble 100 for maybe 2 years- the post-EQ line out was never an issue for me, otherwise I probably would have bought a DI box (I mean, really, I should have one anyway)

 

[Kro]

I think the biggest issue, unless I'm mistaken, is that there's no way to adjust your amp's volume level without also adjusting the level of the signal sending FOH.

Something I saw made me think everything is post....was thinking maybe Ampeg Scrambler w/di.

Looking at the block diagram, I believe this to be mostly correct.

 

[Al Kraft]

IMO a good DI would get you the same or a better outcome and likely cost less (at least at top tier technician rates where I live).

 

[Zooberwerx]

Something I saw made me think everything is post....was thinking maybe Ampeg Scrambler w/di.

Good call. I've used the SCR/DI but did not care for the onboard Scrambler. Perhaps one of the dedicated individual Ampeg pedals would be better.

Riis

 

[agedhorse]

It’s a moderately difficult job for a knowledgeable tech (to do it well), a hack tech could ruin an otherwise good amp however.

 

[cableguy]

IMO a good DI would get you the same or a better outcome and likely cost less (at least at top tier technician rates where I live).

^^^^THIS^^^^^^
BDDI, Tone Hammer, VTDI, + many more. (I prefer the Tech 21 DP3-X for my needs) Look at the TB classifieds. Worse case, you buy it & flip it if you don't like it.

 

[Ggaa]

It’s a moderately difficult job for a knowledgeable tech (to do it well), a hack tech could ruin an otherwise good amp however.

Yeah, I'm not married to the idea, no known problems the way it is, just post. My wireless has an xlr out, but I don't use it all the time.

 

[JeezyMcNuggles]

Something I saw made me think everything is post....was thinking maybe Ampeg Scrambler w/di.

SCR is pretty nice. But, a simple Reddi, would suffice.

 

[StatesideRambler]

Good call. I've used the SCR/DI but did not care for the onboard Scrambler. Perhaps one of the dedicated individual Ampeg pedals would be better.

Riis

Around here somewhere is a lo-o-o-ong thread about the SCR-DI and several people there (Ampeg users, mostly) said they preferred the separate Scrambler pedal over the Scrambler circuit in the SCR-DI. I’m content with the SCR-DI but I don’t record so I have no need to sniff corks.

 

[S-Bigbottom]

Get any DI Box or a DI Preamp and be done.
Pull it out when you do not want to use the Rumble's DI.

If you want the DI attached to your amp, velcro, screw or glue it on.

 

[bassfreakah]

DI box would sound better and be cheaper and easier. Imho

 

[agedhorse]

DI box would sound better and be cheaper and easier. Imho

I wouldn’t say it would sound “better” than an onboard pre DI.

 

[beans-on-toast]

The first stage of the Rumble 200 is a simple TL074 OP amp. Not much sonically interesting there. There’s a reason why the don’t have a pre EQ option, it wouldn’t sound as good as post EQ. You’d get more out of a simple good quality sounding preamp, perhaps even a pedal format, feeding into a DI.

http://www.fmicassets.com/Damroot/Original/10002/Rumble 40 V3 Schematics-Diagrams.pdf

 

[74hc]

If it's a newer version, chances are good it will have surface-mount components which makes modding difficult for all but those with the proper equipment. Far more than the old days of turret boards with larger thru-hole components.

 

[walterw]

a simple Reddi, would suffice.

i'm sure a REDDI would indeed "suffice", at almost the price of two rumble 200s it better!

 

[Al Kraft]

I wouldn’t say it would sound “better” than an onboard pre DI.

IME that's clearly true for many of the newer upper end heads, and most certainly true the ones you've designed. However, there are certainly some heads/combos where I'm sure with your FOH pro-sound hat on you've found a good DI to be a better/quieter/cleaner option. As usual the most universally correct answer here is probably, it depends.

 

[agedhorse]

In this case, I don’t think there will be much of a difference based on what I know about the amp.