Problem JVM205H + Clean Boost (Boosta Grande BG-20)

[Mitchey_Ritchey]

Hello, maybe you can help me, as I am not a specialist but just a pure "user"

When I play the amp and boost my solos with the "Boosta Grande BG-20" clean boost pedal
(up to +20dB of transparent clean boost), the volume only increases minimally!
No matter which channel I use on the amp and how high I set the booster.

I don't use an FX loop but connect the guitar to the booster and then to the amp.

I also use various other amps in this way (VOX AC30C2X, Ibanez TSA15H, Laney IRT120H Ironheart)
and I don't have this problem at all - only with the JVM205H!?!?
The amp has just been completely checked and fitted with new tubes.
Apart from that, the amp runs and sounds sensationally good!

Do you have any idea what the problem could be? Thank you

 

[spacerocker]

The volume only increases minimally because you are boosting an already saturated pre-amp circuit!

Amps like the JVM series were designed to specifically solve problems like this, which was always the problem with single channel amps (without an effects loop)

Personally, I have never seen the point of "boosting" a JVM! By "boosting" all you are doing is adding more gain and/or transistorised distortion. The JVM has plenty of all-valve gain stages built in!

What do you want the boost to do? Raise your volume for leads? You can do this much more effectively on a 205H by using the OD channel for leads, or engaging the second Master Volume!....

 

[Mitchey_Ritchey]

Hi and thank you! Sorry if I have not given enough clear information!

As written above, I only want to boost my solos.

I can not add another boost or a louder channel to the Marshall pedal because I already need to use all 4 "buttons":

1. clean with reverb
2. crunch
3. crunch with reverb and master
4. overdrive/heavy

All at the nearly same volume...

Therefore I use the Boosta Grande or would like to use it for the solo/lead boost!

 

[spacerocker]

Hi and thank you! Sorry if I have not given enough clear information!

As written above, I only want to boost my solos.

I can not add another boost or a louder channel to the Marshall pedal because I already need to use all 4 "buttons":

1. clean with reverb
2. crunch
3. crunch with reverb and master
4. overdrive/heavy

All at the nearly same volume...

Therefore I use the Boosta Grande or would like to use it for the solo/lead boost!

Some options to consider:

1 - you could buy the 6-button footswitch from the JVM410 and use one of the extra buttons to select your preferred solo channel and MV2 (set to give a boost over MV1)

2) Buy a midi foot controller Like the Behringer FCB1010 - this is what I use and is set up as follows

PEDAL 1 = Clean Green + Reverb and Chorus from my G-Major Rack effects - Intros etc....
PEDAL 2 = Crunch Red - Rhythm Guitar
PEDAL 3 = OD1 Orange - Rhythm Guitar
PEDAL 4 = OD1 Orange + MV2 (boost for leads) + Echo from G-Major - Lead Guitar
PEDAL 5 = Same as Pedal 4 but with more echo - Lead Guitar
PEDAL 6 = Crunch Red + "U2" style echo - Rhythm Guitar
PEDAL 7 = Crunch Red + Delay and Chorus - Special effects (keyboard type swells, etc...)

Etc, etc....And that's only Bank 1! I have another 9 Banks to play with!

3) Try putting your boost in the effects loop and engage it just for solos


I hate the fact that you have a sophisticated multi-channel all-valve amp, and have backed yourself into a corner that should only really exist with a single channel amp! If you are using it like a single channel amp, and are trying to boost it with just a pedal in front, you are doomed to failure (or at least very limited success)! This is the problem I had with my old single channel 2203 (i.e. not being able to get a satisfactory boost for solos) and is the single biggest reason I bought the JVM!......

 

[EADGBE]

Does the pedal change the tone at all? If so, how? You may want a volume pedal instead of a clean boost. Although this is just conjecture on my part as I have neither.

 

[Filipe Soares]

I love that pedal name, Boosta Grande. Bosta Grande means big shit in Portuguese.

 

[Mitchey_Ritchey]

Some options to consider:

1 - you could buy the 6-button footswitch from the JVM410 and use one of the extra buttons to select your preferred solo channel and MV2 (set to give a boost over MV1)

2) Buy a midi foot controller Like the Behringer FCB1010 - this is what I use and is set up as follows

PEDAL 1 = Clean Green + Reverb and Chorus from my G-Major Rack effects - Intros etc....
PEDAL 2 = Crunch Red - Rhythm Guitar
PEDAL 3 = OD1 Orange - Rhythm Guitar
PEDAL 4 = OD1 Orange + MV2 (boost for leads) + Echo from G-Major - Lead Guitar
PEDAL 5 = Same as Pedal 4 but with more echo - Lead Guitar
PEDAL 6 = Crunch Red + "U2" style echo - Rhythm Guitar
PEDAL 7 = Crunch Red + Delay and Chorus - Special effects (keyboard type swells, etc...)

Etc, etc....And that's only Bank 1! I have another 9 Banks to play with!

3) Try putting your boost in the effects loop and engage it just for solos


I hate the fact that you have a sophisticated multi-channel all-valve amp, and have backed yourself into a corner that should only really exist with a single channel amp! If you are using it like a single channel amp, and are trying to boost it with just a pedal in front, you are doomed to failure (or at least very limited success)! This is the problem I had with my old single channel 2203 (i.e. not being able to get a satisfactory boost for solos) and is the single biggest reason I bought the JVM!......

Thx

Yeah, you are right...so i guess i have to change my approach with this amp. Best thanks for your very helpful info!!!!

 

[Mitchey_Ritchey]

Does the pedal change the tone at all? If so, how? You may want a volume pedal instead of a clean boost. Although this is just conjecture on my part as I have neither.

No it is only a transparent boost and does not change the tone at all. Because I am playing solos on top of all 4 sounds of my Marshall pedal I thought this will be the best way...

 

[Mitchey_Ritchey]

Ok I spoke to the Marshall guys direct and they recommend to use the FX loop which I did not do in the past.
So this should work. Thank you all

 

[Karl Brake]

Indeed. I swear by a graphic EQ in the loop in my JVMs for the high gain channels. You can adjust it nicely to get just the right quality of boost, and it inherently tightens up the tone for solos...makes it cut through without much change in volume. For the clean channel a compressor does the job...really most of the boosting I do is on the clean channel, which reacts radically different than the high gain channels. One other trick is a Robin Trower thing...a univibe can be a great solo tool...on single notes, it adds warm clarity and subtle volume boost, and great fluidity...you really don't hear the Leslie effect on single notes.

 

[scozz]

Indeed. I swear by a graphic EQ in the loop in my JVMs for the high gain channels. You can adjust it nicely to get just the right quality of boost, and it inherently tightens up the tone for solos...makes it cut through without much change in volume.

Yeah, an eq in the loop works great, shaping and boosting options are many. Even I use an eq in the loop of my SC20 playing at home.

 

[MonstersOfTheMidway]

I love that pedal name, Boosta Grande. Bosta Grande means big shit in Portuguese.

I did not know that, but now I'm very happy to learn something new.

Now, I can say, "Excuse me while I go take a bosta grande over here."