Hi. My name is Fannar and i have had the Line 6 M13 for 2 years and I love it !

I have always connected it with the Four Cable Method and never had any problems but recently I got the feeling that everything wasn't right.

I use Bank 1 for Overdrive and Distortion (FX in front of the amp) and Bank 2,3,4 for Modulation, Reverb and Delay (After the Amp/Via the loop)

In the past I always had this smooth/rich/heaven like Delay sound (Bank 2,3,4 in the FX LOOP) but like 4-5 weeks ago it changed. It's like the Delay is in front of the amp. I've tried to reconnect my setup like 9-10 times (always connect via the 4 Cable Method) but it stays the same. It's hard to explain but i feel my Delay isn't blending with the signal as well it did. It's like the Delay sticks out if you know what I mean. I play a note and the Delay note doesn't exactly blend with playing. It's more like having 2 seperate players play at the same time.

I can't even hear a difference if a connect my M13 just through the Input and Output or via the 4-CM and i find that strange. I should hear a really big difference. Specially on the Modulation and Delay FX.

I also can hear a slight volume boost when i engage my Delay. I had never noticed that before but I think it started when the M13 started to behave weird. The Delay should be transparent and not have anything to do with the volume ?

What could this do ? Should i reset my M13 ? Could this be a bad cable ? Could some of my internal M13 settings be wrong and interfering with the 4-CM ?

I play through the Mesa Boogie Express 5:50 1x12 combo. The only info i can find on the FX loop : Fully Buffered FX Loop , The transparent series EFFECTS LOOP handles the interface to all outboard processing.

Could the Mesa FX LOOP be broken ?

Please let me know if you have any ideas how to solve this and help my to get my smooth Delay and Reverb back !