I found in relative esoteric comparisons the place to start is with AI.
Here’s how these three tend to differ sonically (all system-dependent, of course):
IsoTek V5 Titan (high-current conditioner for amps/subs)
Feel: punchy, dynamic, “unclamped.” Often adds bass grip/weight while keeping transient slam intact.
Why: it’s purpose-built for big current delivery (3 high-current outlets; massive surge protection), so amps don’t sound choked. Many listeners note extra kick in the mid-bass and a cleaner floor without dulling leading edges. (IsoTek, Alpha Audio, Music Direct, Facebook)
Puritan (top tier: PSM156 / PSM1512)
Feel: blacker backgrounds, smoother/“sweeter” mids, and a calmer treble; can read a touch warmer and more relaxed.
Why: extensive multi-stage filtering and DC blocking across many individually filtered outlets. Fans praise hum/noise removal and a more liquid presentation; a few reviews found the effect system-dependent—stellar in some rigs, less so in others. (PSM1512 is a 12-outlet expansion of 156 with the same sonic aim.) (6moons, The Audiophile Man, Steve Huff Hi-Fi, Alpha Audio, AudioVision San Francisco)
inakustik Reference Power Station AC-4500P
Feel: very clean, fast, and transparent; tighter, quicker bass and a focused, deep soundstage—often perceived as leaner/clearer vs. Puritan’s warmth.
Why: high-current parallel filtration and low-resistance busbars aim to avoid current limiting; several evaluations noted better bass control and spatial focus, even compared directly to Puritan’s 1512. (Stereo Times -, Small Green Computer, Mono and Stereo)
Quick pick guide
Want maximum slam & zero dynamic constriction on power amps? IsoTek V5 Titan on the amps, with a separate unit for sources if needed. (IsoTek)
System a bit edgy/bright and you crave ease and “inkier” silence? Puritan PSM156/1512. (6moons, The Audiophile Man)
System already warm/rich and you want speed, clarity, stage focus, and taut bass? inakustik AC-4500P. (Stereo Times -)
Setup notes that affect the sound
Keep high-current amps on high-current outlets (IsoTek Titan or inakustik do well here); put sources on the multi-filter banks (Puritan excels). (IsoTek, AudioVision San Francisco)
Expect room and power quality to swing results; the same unit can sound transformative in one system and subtle in another. (Alpha Audio)
If you tell me your system (amp/speakers, room size, what you’re hoping to change), I’ll tailor a recommendation and ideal outlet layout.