PedalCurrent drawAdapter*
Compact pedals
AC-2 Acoustic Simulator18 mA (stated)PSA
AC-3 Acoustic Simulator39 mA (stated)PSA
AD-2 Acoustic Preamp55 mA (stated)PSA
AW-2 Auto Wah15 mA (stated)PSA
AW-3 Dynamic Wah45 mA (stated, max)PSA
BB-1X Bass Driver54 mA (stated)PSA
BC-1X Bass Comp90 mA (stated)PSA (internally doubled to 18vDC, so don't go above 9vDC input voltage)
BC-2 Combo Drive45 mA (stated)PSA
BD-2 Blues Driver13 mA (stated)PSA
BD-2W Blues Driver (Waza Craft)18 mAPSA
BF-2 Flanger15-18 mA (fluctuating)ACA/PSA
BF-2B Bass Flanger14 mA (stated)ACA 12v
BF-3 Flanger40 mAPSA
CE-2 Chorus9 mAACA 12v
CE-2B Bass Chorus9-11 mA (fluctuating)ACA 12v
CE-2W Chorus (Waza Craft25 mA (stated)PSA
CEB-3 Bass Chorus18 mA (stated)PSA
CE-3 Chorus13 mA (stated)ACA 12v
CE-5 Chorus Ensemble20 mAPSA
CH-1 Super Chorus15 mAPSA
CP-1X Compressor90 mA (stated)PSA (internally doubled to 18vDC, so don't go above 9vDC input voltage)
CS-1 Compressor5 mA (stated)ACA 12v
CS-2 Compressor4 mAACA 12v
CS-3 Compressor10 mAPSA
DA-2 Adaptive Distortion45 mA (stated)PSA
DC-2 Dimension C30 mAPSA
DC-3 Digital Dimension / Digital Space-D60 mA (stated)PSA
DD-2 Digital Delay54 mAPSA
DD-3 Digital Delay45-54 mA (depending on the version)PSA
DD-5 Digital Delay57 mAPSA
DD-6 Digital Delay55 mA (stated)PSA
DD-7 Digital Delay52 mAPSA
DF-2 Super Feedbacker & Distortion10 mA (stated)ACA 12v
DM-2 Delay11 mA (stated)ACA 12v
DM-2W Delay (Waza Craft)35 mAPSA
DM-3 Delay11 mAACA 12v
DN-2 Dyna Drive36 mA (stated)PSA
DS-1 Distortion4 mAACA/PSA
DS-1X Distortion45 mAPSA
DS-2 Turbo Distortion12 mA (stated)PSA
DSD-2 Digital Sampler/Delay55 mA (stated)PSA
DSD-3 Digital Sampler/Delay55 mA (stated)PSA
EH-2 Enhancer24 mA (stated)PSA
FBM-1 Fender ’59 Bassman (COSM)36 mA (stated)PSA
FDR-1 Fender ’65 Deluxe Reverb (COSM)40 mA (stated)PSA
FRV-1 Fender Reverb37 mA (stated)PSA
FT-2 Dynamic Filter16 mA (stated)ACA 12v
FZ-2 Hyper Fuzz14 mA (65mA stated!!)PSA
FZ-3 Fuzz6 mAPSA
FZ-5 Fuzz (COSM)36 mA (stated)PSA
GE-6 Equalizer7 mAACA 12v
GE-7 Equalizer7 mAACA/PSA
GE-7B Bass Equalizer16 mA (stated)ACA 12v
GEB-7 Bass Equalizer17 mAACA/PSA
HF-2 Hi Band Flanger18 mA (stated)ACA 12v
HM-2 Heavy Metal10 mA (stated)ACA 12v
HM-3 Hyper Metal12 mA (stated)PSA
HR-2 Harmonist75 mA (stated)PSA
LM-2 Limiter12mA (stated)ACA 12v
LM-2B Bass Limiter16 mA (stated)?
LMB-3 Bass Limiter Enhancer17 mA (stated)PSA
LS-2 Line Selector25 mA (stated)PSA
MD-2 Mega Distortion18 mA (stated)PSA
ML-2 Metal Core30 mAPSA
MO-2 Multi Overtone40 mA (stated)PSA
MT-2 Metal Zone20 mA (stated)PSA
MZ-2 Digital Metalizer70 mA (stated)PSA
NF-1 Noise Gate4 mA (stated)ACA 12v
NS-2 Noise Suppressor20 mAPSA
OC-2 Octave4 mAACA/PSA
OC-3 Super Octave45 mA (stated)PSA
OD-1 OverDrive4.5 mAACA 12v
OD-1X OverDrive45 mAPSAv
OD-2 Turbo Overdrive10 mAACA 12v
OD-2R Turbo Overdrive16 mA (stated)PSA
OD-3 Overdrive9 mA (stated)PSA
ODB-3 Bass Overdrive13 mAPSA
OS-2 Overdrive/Distortion12 mA (stated)PSA
PH-1 Phaser7 mA (stated)ACA 12v
PH-1R Phaser11 mA (stated)ACA 12v
PH-2 Super Phaser16 mAACA/PSA
PH-3 Phase Shifter50 mAPSA
PN-2 Tremolo/Pan20 mA (stated)PSA
PQ-3B Bass Parametric EQ25 mA (stated)PSA
PQ-4 Parametric EQ21 mAPSA
PS-2 Digital Pitch Shifter/Delay60 mA (stated)PSA
PS-3 Digital Pitch Shifter/Delay70 mA (stated)PSA
PS-5 Super Shifter50 mA (stated)PSA
PS-6 Harmonist45 mA (stated)PSA
PSM-513 mA (stated)PSA
PW-2 Power Driver15 mA (stated)PSA
PW-10 V-wah55 mA (stated)PSA
RC-2 Loop Station95 mA (stated)PSA
RC-2 Loop Station50 mA (stated)PSA
RC-3 Loop Station70 mA (stated)PSA
RV-2 Digital Reverb130 mA (stated)PSA
RV-3 Digital Reverb/Delay70 mAPSA
RV-5 Digital Reverb50 mA (stated)PSA
RV-6 Reverb65 mA (stated)PSA
SD-1 Super Overdrive5 mAACA/PSA
SD-1W Super Overdrive (Waza Craft)15 mAPSA
SD-2 Dual Overdrive21 mA (stated)PSA
SG-1 Slow Gear3.5 / 6.5 mAACA 12v
SP-1 Spectrum23 mA (stated)ACA 12v
ST-2 Power Stack36 mA (stated)PSA
SYB-3 Bass Synthesizer80 mA (stated)PSA
TE-2 Tera Echo53 mA (stated)PSA
TR-2 Tremolo19 mAPSA
TU-2 Tuner35 mA maxPSA
TU-3 Tuner35 mA max (85 mA in high brightness mode)PSA
TU-3S Chromatic Tuner35 mA max (95 mA in high brightness mode)PSA
TU-3W Tuner (Waza Craft)60 mA max (110 mA in high brightness mode)PSA
TW-1 Touch Wah / T Wah6 mA (stated)ACA 12v
VB-2 Vibrato14 mA (stated)ACA 12v
VB-2W Vibrato (Waza Craft)35 mA (stated)PSA
VO-1 Vocoder65 mA (stated)PSA
XT-2 Xtortion15 mA (stated)PSA
Twin pedals
CE-20 Chorus Ensemble165 mAPSA
DD-20 Digital Delay172 mAPSA
EQ-20 Advanced Equalizer120 mA (stated)PSA
GP-20 Amp Factory85 mA (stated)PSA
OC-20G Poly Octave?PSA
OD-20 Drive Zone85 mA (stated)PSA
RC-20 Loop Station85 mA (stated)PSA
RC-20XL Loop Station106 mAPSA
RC-30 Loop Station195 mA max (stated)PSA
RE-20 Space Echo75 mA (stated)PSA
RT-20 Rotary Processor85 mA (stated)PSA
SL-20 Slicer110 mA (stated)PSA
VE-20 Vocal Performer180 mA max (stated)PSA
WP-20G Wave Processor?PSA
AD-3 Acoustic Instrument Processor90 mA (stated)PSA
AD-8 Acoustic Guitar Processor120 mA (stated)PSA
DD-500 Digital Delay180 mAPSA
ES-5 Effects Switching System125 mA (stated)9vDC, center negative
ES-8 Effects Switching System400 mA (stated)9vDC, center negative
FW-3 Foot Wah5 mAPSA
PW-3 Wah Pedal25 mAPSA
PW-10 V-wah55 mAPSA
RC-300 Loop Station350 mA max (stated)9vDC, center negative

* Note:

All Boss pedals have a sticker near the adapter jack, which indicates which adapter is needed. PSA pedals wants to see a regulated 9vDC adapter, while ACA pedals (made before august 1997) wants unregulated 12vDC. Since august 1997, all Boss pedals (including surviving ACA designs) use 9 volts DC and are labeled ”PSA”.

Therefore, adapter listings that read ”ACA/PSA” means that if the pedal is older than mid 1997, it wants the old-style ACA adapter. If it is newer, or if it has been modified to PSA specs, it works fine with the 9vDC PSA adapter. To find out (if the sticker isn’t there), plug your regular 9v supply into the pedal in question (alone, without daisy chain) – if the LED barely lights up, the pedal is definitely older than 1997.

Also, old (pre august 1997) ACA pedals will work fine from 9vDC, if they are daisy-chained with regular PSA pedals, and have signal cables connected between them. There’s a more indepth article about it here, if you’re so inclined. But whatever you do, don’t confuse ACA with ”AC” – the pedal still expects a DC input voltage, and feeding it 9vAC will fry it.