Marshall TSL100 FX Loop problems

[BoD]

I recently purchased a sonic maximizer for my rig and can't get it to work through the fx loop on the back of the amp. I tried both A and B fx loops with my buddies rack with the same results. It doesn't change the raw sound at all, plugged in or unplugged. The thing thats got me baffled is that the tuner does work on both rack systems but not the fx. How is this possible? The signal is still making its way through the tuner to the maximizer and back to the head but without being changed.... I don't get it.

The BBE does work on other amps, so I know it's not broke.

Also the mute button on my Korg DTR1000 tuner stopped working as well. I'm not sure if that is related or if I am just having some incredibly bad luck.
:(:(:(:(:(:(:(:(:(

[failsafe306]

The TSL uses a parallel effects loop, right? I had one years ago, but can't remember. It needs to be in series with your guitar signal, not parallel. It's basically being mixed in with the dry amp signal and that's why you aren't noticing any difference.

[BoD]

At the risk of sound completely stupid.........I don't know what that means. this is how I have it hooked up.

I'm running a cable from the "send" on the amp to the "input" on the tuner, then "output" of the tuner to the "in" on BBE and then back "out" to the "return" on the amp.

[Donting101]

BoD, what he is saying is that the TSL has a parallel effects loop, not a series loop

The difference is:

Three people walking side by side up the street, are walking in parallel
Three people walking 1 by 1 one behind the other, are walking in series

This means that if your loop is parallel, half of your signal is going out of the loop and into your tuner/maximize then back in (thus becoming a ‘wet’ signal’) and the other half of the signal is not going out of the loop at all, and is going straight to the power amp, bypassing the loop entirely – so you are getting a blended overall output of an effected signal and a totally dry signal

Most amps with parallel effects loop have a knob on the side where you can adjust the mix to say 15% wet and 85% dry, or 50/50 or 100% wet and 0% dry – if you can, set it to 100% so all of your signal runs through your rack gear.

I’ve never looked at the back of a TSL so if it is parallel and does not have one of these knobs then there is a chance it has a fixed level of wet/dry (which would be extremely gay). If you have the manual (if not download one PDF), and find out if both of them are parallel loops with a fixed wet/dry mix, or if the mix level can be changed – or if one of the loops IS serial but you just have the stuff hooked up in the wrong loop

Find out this stuff first then come back here k?

[KH Guitar Freak]

Oh wait, the mix knob is on the front panel of the amp...

[BoD]

2. Effects Loop A & Effects Loop B
The TSL supports two effects loops, which can be used in a variety of
ways.
Loop A when used on its own, is the master loop for the amp and will
channel switch from clean to overdrive when you change channels,
allowing you to set the individual mix from the front panel Mix controls.
Loop B is the specific loop for using effects on the overdrive channels
(Crunch / Lead) and if used on its own will only provide effects when on
these channels, leaving the clean channel totally dry.
When Loop B is in use Loop A becomes available for use solely on the
Clean channel. This means that you can have two totally different FX
systems, one for clean and one for overdrive.
Each loop has its own ‘loop level’ pushswitch, enabling you to select the
right send and return levels to suit whatever effects system you are using.
With the switch ‘out’, the level within the loop is high (suitable for most
pro rack fx). With the switch ‘in’, the level within the loop is set at a
much lower signal level (suitable more for floor pedals or lesser spec’d
rack units).
Note: The loops are in parallel mode until the mix controls are at 10
when the loop converts to series mode. Also, remember that as the loops
are between the preamp and the power amp, this is NOT the place for
distortion type effects units.

Well.....I think I found my problem! Instructions...Pffft...who needs 'em.

[Donting101]

good man. sorted.

don't forget to switch the switch to allow for line-level signal so the units don't overdrive your signal