Below is a list of all designs I have verified are Hegeman's work (in whole, or as a collaboration). 

Know of others? 

Have information to share about the designs or the man himself? 

Message me through AudioKarma or DIYAudio with the links below

Speakers

FOR AMPEG

• V4-B Bass Cabinet

FOR BROCINER

• Brociner Transcendent

• Brociner Model 4 Horn (C4 & M4)

FOR EICO

• HFS-2 (See Hegeman Standard)

FOR HARMAN KARDON

• Citation X

FOR HARTKE

• 1st Generation HARTKE Bass Drivers

HEGEMAN

• Hegeman Professional

• Hegeman Standard

• T1 & M1 Tweeter

• Hegeman Labs Model 1 

• Hegeman Labs Mode 2

• The HSW (Hegeman Subwoofer)

• Hegeman Labs Model 80

• Hegeman Labs Model 100

• Hegeman Labs Model 120

FOR LOWTHER

• Hegeman-Lowther Reproducer

Amplifiers, Preamplifiers, Tuners

FOR BROCINER

• Mark 12 Amplifier

• CA-2 Preamplifier

• UL-2 Amplifier

FOR DYNACO

• FM-1 Tuner

• FM-3 Tuner

HEGEMAN

• Hegeman HPR & HEU (Phono Preamp)

• Hegeman HAPI (Preamplifier)

• Hegeman HAPI 2 (Preamplifier)

• Hegeman Labs HL-100 Preamplifier (HLA)

• Hegman Labs HL-200 Stereo Power Amplifier (HLB)

• Hegeman Labs HL-320 Jack Panel & Metering Unit

FOR LAFAYETTE

• KT-600 Stereo Control Center (LA-600)

• KT-550 Power Amplifier (LA-550)

FOR HARMAN KARDON

• Citation I Preamplifier

• Citation II Power Amplifier

• Citation III Tuner (Also III-X)

• Citation IV Preamplifier

• Citation V Power Amplifier

• Citation A Preamplifier

• Citation B Power Amplifier

• The Award A300

• The Award A500

• The EPIC A250

Other Designs / Works

• The Hegeman "HIP" Probe (phono to preamp load matching device)

• The Hegeman VTR (prototype B&W and Color video tape recorder)

• A Big-Screen Projection TV (the first? ) for a bar in Hegeman's neighborhood

• Hegeman was the engineer behind Westminster's "SonoTape" audio tapes and "Lab Series" records