No safe generic
Three versions use three different supplies, and polarity rests on a forum reading of a label.
Keys and organs / TASCAM
Power Supply for TASCAM 424 Portastudio
Depends on the version: barrel wall adapter (original), built-in cord (MKII), multi-pin inline supply (MKIII)
Verified November 2026
Which one do you have?
You need: PS-P424 or equivalent: 12 V, at least 1100 mA, center negative
You need: Internal supply; no external adapter reported
You need: PS-P424MKIII replacement with the same plug; count pins first
- Device end
- Original: 2.5 mm barrel reported. MKII: fixed cord. MKIII: multi-pin plug, reported as 5-pin or 6-pin.
- Wall end
- Plug-in adapter, 120 V AC 60 Hz on the US PS-P424
- Voltage
- Original PS-P424: 12 V DC out. MKIII mains: 120 V AC 60 Hz US.
- Current
- Original 1100 mA; MKIII 22 W
- Polarity
- Original: center negative, shell positive (forum reading of the label)
The usual mistake
Using a center-positive 12 V wall wart or one short on current; forum owners say most generic warts can't drive a Portastudio.