Sunfire Standard or Signature Edition

Ah, I just noticed something in the specs...

The Signature Edition is 2 lbs heavier than the Standard Edition. I'm going to weigh them tonight and hope that the top amp is 2 lbs heavier than the bottom amp. That 2 lbs would make it worth at least $500 more. :)

Wish me luck!

They both look like Standard 300-2 models, 5amp fuse and captive power cord.

I’ll check my archives.

The top one appears to be a 1st version Sunfire 300 w/ gold posts, captive power cord (no IEC), no power switch... bottom looks like the later model 300x2 w/ plastic posts, captive power cord, no power switch. Standard models operate at 390 joules (same as photos). These are not Signature Editions.
These are the Sunfire models...

1). Sunfire 300 Load Invariant   1996 -2000 (no switch)
    Sunfire 300 x 2 ... (end of Series 1) IEC, plastic posts.

2). Sunfire Series II 2001 - 03 325w/8, 650w/4
    Architect’s Choice (with on/off)       17” wide

3). Sunfire 300 -Two   2004 300w   19” wide
    - plastic binding posts, diff rear panel L/R layout
    - Balanced design**

Sunfire 600         1997 1200w/4 ohms   19” wide
Sunfire 600-Two   2004

Sunfire Signature     600w   1997   19”wide   $2995
Sunfire Signature II   650w     2001   17” wide
(uses gold spkr terminals).

The Tell-tale sign... model 300 operates at about 390 joules, 600 signature about 470 joules.

Also, back of Sunfire Signature 600
https://www.ukaudiomart.com/details/649279940-sunfire-signature-600-ii-one-of-the-most-powerful-ampl...

https://forum.audiogon.com/discussions/sunfire-signature-what-is-this