Troubleshooting Problems

MP1 No Output, "Magic Smoke" smell

Started by Hambone

Replies: 7
Views: 4,242

August 20, 2022, 06:02:27 AM
by Harley Hexxe

MP1 - Developed very loud hum on tube settings

Started by MR THUD

Replies: 8
Views: 4,783

August 29, 2022, 11:38:14 AM
by MarshallJMP

Solid State Clean Gets Nasty

Started by Moff40

Replies: 5
Views: 3,811

August 29, 2022, 09:34:51 PM
by Moff40

No Edit Function after replacing battery and eprom

Started by potus2028

Replies: 1
Views: 4,092

October 14, 2022, 09:30:47 PM
by rnolan

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

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

Started by Systematic Chaos

Replies: 11
Views: 6,028

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

MP1 Classic Err 7

Started by leninvargas

Replies: 6
Views: 7,988

May 08, 2023, 12:50:40 PM
by MarshallJMP

ADA mp1 - Solid States works only

Started by gg85

Pages1 2 3

Replies: 31
Views: 12,409

October 05, 2023, 11:42:29 PM
by rnolan

LED Issue MP1

Started by Mojave

Replies: 4
Views: 11,371

December 31, 2023, 12:47:45 PM
by Mojave

MP-1 Classic Noise Gate "stuck" at max values even when turned off

Started by Bret

Replies: 5
Views: 14,910

April 24, 2024, 03:19:42 PM
by Harley Hexxe

ADA MP-1 Master Gain Volume Issue

Started by charv712

Replies: 8
Views: 518

June 20, 2024, 01:13:10 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

No chorus and distorted SS voicing after noise mod

Started by Moulashaker

Pages1 2 3 ... 6

Replies: 81
Views: 2,153

July 09, 2024, 11:53:15 AM
by Gregg

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: Improving ripple distortion in compressor.

Started by Kazinator

Replies: 1
Views: 748

September 01, 2024, 08:53:19 PM
by Kazinator

MP-1 v2.01 120hz hum and loss of drive

Started by guitarmutant

Replies: 3
Views: 152

October 27, 2024, 02:35:59 PM
by Kazinator

B200s hum

Started by duecemfhatchet

Pages1 2

Replies: 16
Views: 3,715

November 02, 2024, 02:35:08 AM
by duecemfhatchet

MP-1: degraded sound quality when panels open.

Started by Kazinator

Replies: 1
Views: 41

November 04, 2024, 05:05:30 AM
by rnolan

MP-1 possible issues after noise mod (OD1 LED clipping at low gain)

Started by Loktite

Pages1 2 3

Replies: 38
Views: 1,050

November 05, 2024, 12:16:48 PM
by MarshallJMP