Troubleshooting Problems

Loud pop/click when changing to a preset with clean tube voicing

Started by RobinL

Pages1 2

Replies: 25
Views: 1,099

July 29, 2024, 11:52:44 AM
by MarshallJMP

MP-1 v.2 Not editable equalizer.

Started by RVLP

Pages1 2

Replies: 15
Views: 13,655

October 28, 2022, 09:18:08 AM
by MarshallJMP

Clicks when switching presets

Started by sadky

Replies: 6
Views: 5,587

October 03, 2014, 05:47:22 AM
by Systematic Chaos

MP1 V2 (no top switch) All original excluding battery mod

Started by ScottGray

Pages1 2

Replies: 26
Views: 9,787

October 18, 2020, 11:03:11 AM
by MarshallJMP

MP2 Volume drop

Started by Shredzilla

Pages1 2

Replies: 25
Views: 14,224

July 27, 2014, 12:23:00 AM
by Shredzilla

MP2 suddenly noisy after a show

Started by SidecarJoeG

Replies: 13
Views: 11,161

May 10, 2014, 07:12:23 AM
by MarshallJMP

110v -> 220v

Started by Sirion

Replies: 2
Views: 3,631

January 05, 2017, 09:07:01 AM
by MarshallJMP

MP1 1.38 - Is my Chorus failing???

Started by skarkowtsky

Replies: 11
Views: 5,482

May 09, 2021, 02:50:58 AM
by MarshallJMP

ADA MP-1 Extreme Restoration

Started by SteveFuzz

Replies: 14
Views: 9,560

March 09, 2017, 05:24:45 AM
by Iperfungus

V1.38 gain drop/loss just seconds after startup / warmup (solved)

Started by Systematic Chaos

Replies: 11
Views: 6,027

October 28, 2022, 07:26:03 PM
by rnolan

MP-1 full refurb and restoration

Started by Systematic Chaos

Replies: 4
Views: 5,502

November 23, 2022, 07:09:05 AM
by MarshallJMP

No lights No sound and a hot ic

Started by t-rack

Pages1 2

Replies: 20
Views: 11,582

April 28, 2015, 02:38:42 AM
by MarshallJMP

MP-1- err 1 on startup

Started by tabascojunkie

Replies: 8
Views: 8,465

July 27, 2017, 03:50:00 AM
by MarshallJMP

MP-1 Classic dead

Started by tangohf

Replies: 4
Views: 4,543

December 07, 2014, 04:50:19 PM
by MarshallJMP

No SS voicing

Started by Tweeddeluxe1

Pages1 2 3

Replies: 41
Views: 928

June 28, 2024, 02:46:53 AM
by rnolan

Very OT: Refrigerator repair

Started by vansinn

Replies: 12
Views: 7,608

July 12, 2016, 12:50:14 PM
by vansinn

MP-2 After the noise mod - Spanky Clean is distored . . .

Started by W.Laturno

Pages1 2

Replies: 19
Views: 12,506

June 16, 2014, 05:14:37 AM
by rnolan

MP-1 diagnosis

Started by willem

Replies: 4
Views: 5,139

December 02, 2014, 10:55:53 AM
by MarshallJMP

Help with MC-1

Started by Wimbish

Replies: 12
Views: 7,264

February 01, 2018, 04:44:14 AM
by rnolan

MP1 v 1.38 no sound can someone help me out?

Started by Wormwoody

Pages1 2

Replies: 16
Views: 9,603

May 05, 2018, 10:06:19 AM
by Wormwoody