Amcron Crown VFX2A dual channel filter, active crossover, 1988, made in USA

Link: Owner's Manual [PDF, eng]

Model: VFX2A
Manufactured: Crown International-Amcron
Type: Crossover Network - Pro
Year: 1988

Crown D-75A Stereo Power Amplifier, 2000-2014, made in USA

The D-45 and D-75A are perfect for moderate power applications such as recording or broadcast studio near-field monitoring, video suite audio monitoring, a recording/broadcast headphone amp or a small paging system. Designed, built and carefully checked to ensure reliable operation with a wide variety of loads, Crown D Series amplifiers are convection cooled. Their high reliability is particularly important in reducing maintenance costs. 

Link: crownaudio | !!!FULL DESCRIPTION!!! | Reference Manual | Service Manual

Date of manufacture (D-75A): 2000s ~ 2014

The D-75A is a cost-reduced version that came out sometime in the 2000s. 

It should have the same basic performance, but Crown took away the speaker connectors and replaced them with a terminal strip to save itself money. 

Crown also removed the dedicated unbalanced input and instead uses XLR combo jacka for balanced inputs only. The combo jacks will accept XLR or 1/4", but it's a 1/4" TRS balanced input, not the mono 1/4" jack that completely bypassed the balanced input for home Hi-Fi use — which is probably what most of you reading this want. 

The D-75A also has a Mono mode, but you have to open the case to switch it.

Crown offshored the D-75A to China in its last days before it was discontinued in 2014. It's best to avoid the newer D-75A, even if it looks cooler in black.