[Kronos147]

Is this the complete list of 500 series EQ's?

A Designs EMPEQ - 2 band pultec design

Alta Moda Audio AM-20 - 4 band, 2 band fully parametric

API 550A - 3 band + high/low pass filters, Discrete, High and low bell/shelf switches
550b - 4 band, Discrete ('hybrid'), High and low bell/shelf switches
554 - 3 band sweepable frequencies
560 - 10 band graphic, Discrete (vintage) and hybrid (new) models

Anamod AM EQP - "500 series incarnation of the classic EPQ1A" 2 band + filter

Arsenal Audio V14 - four band fixed bandwidth

Avedis E27 - 3 band + high/low pass filters, Discrete, High and low bell/shelf switches

Buzz Audio Tonic - 3 band, mid with 10? x2 selectable frequencies + HPF, Class A, "utilizing both real chokes and electronic filters"

Daking Plus EQ500 - no longer in production :-(

Eisen LiLPEQr - no longer in production :-(

JLM Audio PEQ500 - "Pultec EQP-1A & EQP-1R type passive EQ circuit w/ 8 extra low and 5 high frequencies...the Q control will switch the high boost to a shelf...

Purple Audio Odd Inductor EQ - 4 band with two selectable frequencies per band, High and low bell/shelf switches.
Tav 10 band graphic - inductor based graphic EQ

S&M Audio EQSM1 - 4 band w/ HPF, high and low shelf with 2 selctable frequencies and two mid bands of semi-parametric fixed bandwidth EQ, true bypass feature

Speck ASC-V 4 Band Parametric EQ
Low band - semi parametric 25Hz - 400Hz, peak/shelf switch
Low/mid band - fully parametric, sweepable, switched between 40Hz - 800Hz or 400Hz - 8kHz, variable bandwidth
Mid band - fully parametric 400Hz to 10kHz, variable bandwidth
High band - semi parametric 2kHz - 25kHz, peak/shelf switch

Having only heard a few of these, I ask for opinions of the following assessment:

Color:
EMPEQ
550A
550B
560
AM EQP
V14
PEQ500
Tav

Surgical:
AM-20
ASC-V

Crossover (a little bit of both):
Tonic
Odd
EQSM

And finally, for those who have experienced most if not all of these units, in what order would you suggest someone audition units for color, surgical, or crossover use?