Troubleshooting Problems

Fixing-up any old gear

Started by vansinn

Pages1 2

Replies: 15
Views: 23,397

February 15, 2017, 10:27:25 AM
by DannyjoeCarter

Volume increases then drop when changing preset

Started by Wheeljack1976

Pages1 2

Replies: 16
Views: 2,069

March 05, 2025, 02:35:07 AM
by rnolan

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

Started by RobinL

Pages1 2

Replies: 26
Views: 2,973

February 22, 2025, 11:24:20 PM
by Wheeljack1976

MP-1 Front panel causing 164 Hz buzz, exaggerated when pushing buttons

Started by Purgasound

Replies: 5
Views: 1,605

January 21, 2025, 12:46:14 PM
by MarshallJMP

MB-1 Err 1 + Err 7

Started by rafammbass

Replies: 8
Views: 1,077

January 16, 2025, 06:51:49 AM
by Peter H. Boer

Rear output jacks

Started by Gupr01

Replies: 1
Views: 750

December 30, 2024, 08:28:32 AM
by Purgasound

MP-1: What voltage do you see at front input jack?

Started by Kazinator

Replies: 8
Views: 1,709

December 02, 2024, 12:31:06 PM
by Harley Hexxe

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

Started by Loktite

Pages1 2 3

Replies: 38
Views: 4,151

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

MP-1: degraded sound quality when panels open.

Started by Kazinator

Replies: 1
Views: 1,007

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

B200s hum

Started by duecemfhatchet

Pages1 2

Replies: 16
Views: 5,462

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

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

Started by guitarmutant

Replies: 3
Views: 1,026

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

MP-1: Improving ripple distortion in compressor.

Started by Kazinator

Replies: 1
Views: 1,907

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

No chorus and distorted SS voicing after noise mod

Started by Moulashaker

Pages1 2 3 ... 6

Replies: 81
Views: 6,700

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

No SS voicing

Started by Tweeddeluxe1

Pages1 2 3

Replies: 41
Views: 3,614

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

ADA MP-1 Master Gain Volume Issue

Started by charv712

Replies: 8
Views: 1,764

June 20, 2024, 01:13:10 PM
by MarshallJMP

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

Started by Bret

Replies: 5
Views: 16,057

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

LED Issue MP1

Started by Mojave

Replies: 4
Views: 12,441

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

ADA mp1 - Solid States works only

Started by gg85

Pages1 2 3

Replies: 31
Views: 14,835

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

MP1 Classic Err 7

Started by leninvargas

Replies: 6
Views: 9,046

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

MP-1 full refurb and restoration

Started by Systematic Chaos

Replies: 4
Views: 6,634

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