Troubleshooting Problems

MB-1 no output

Started by peoriashows

Replies: 7
Views: 4,790

July 28, 2018, 11:51:45 PM
by rnolan

MB-1 Error Messages

Started by kawai2g4b

Replies: 2
Views: 5,343

November 29, 2013, 08:14:48 PM
by kawai2g4b

Low Volume & Unpleasant Distortion in one output channel.

Started by Auntie Ada

Replies: 9
Views: 7,399

July 29, 2015, 02:26:50 PM
by MarshallJMP

Light went out on MP-2 display

Started by Ekornbakke

Replies: 2
Views: 3,827

November 19, 2014, 05:22:06 AM
by rnolan

LED Issue MP1

Started by Mojave

Replies: 4
Views: 7,258

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

Latency with SPX90

Started by Chip Roberts

Replies: 13
Views: 5,872

July 01, 2020, 03:07:40 AM
by rnolan

Hum and Crack on DIST mode

Started by Jonar

Replies: 3
Views: 4,090

August 31, 2014, 01:28:19 PM
by MarshallJMP

Help with mp1 - low distortion and "sputtering"

Started by Cstecker

Replies: 13
Views: 8,807

February 27, 2017, 03:58:07 PM
by Harley Hexxe

Help with MC-1

Started by Wimbish

Replies: 12
Views: 6,782

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

Ground hum noise

Started by dave_daut

Replies: 5
Views: 4,991

April 08, 2014, 08:45:59 AM
by rnolan

Got noise???

Started by Dante

Replies: 7
Views: 6,131

January 15, 2018, 12:27:21 AM
by rabidgerry

Gain drop

Started by Richie_B

Pages1 2

Replies: 17
Views: 9,080

July 12, 2016, 07:22:55 AM
by MarshallJMP

Front panel don´t work

Started by kserri

Replies: 5
Views: 5,147

January 30, 2015, 04:21:33 AM
by rnolan

front panel

Started by kserri

Replies: 3
Views: 4,737

December 03, 2018, 01:11:27 AM
by rnolan

Fixed: MP-1 with ALL clip leds lit solid and NO sound (long post)

Started by Pork_Chop

Replies: 2
Views: 2,421

November 12, 2021, 09:17:43 AM
by MarshallJMP

Extreme hiss and microphonic V1 tube circuitry

Started by NeverAfter

Pages1 2

Replies: 19
Views: 10,887

May 06, 2016, 10:33:18 AM
by rnolan

error codes

Started by Mike_Revis

Replies: 3
Views: 4,433

March 27, 2014, 03:45:20 PM
by MarshallJMP

Dialing Down on Signal Cut

Started by Chip Roberts

Replies: 3
Views: 2,760

January 22, 2021, 05:54:36 PM
by Harley Hexxe

Clicks when switching presets

Started by sadky

Replies: 6
Views: 5,245

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

Battery Issue in MP-1

Started by kfowler8

Pages1 2

Replies: 18
Views: 15,444

March 27, 2015, 01:07:53 PM
by MarshallJMP