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Telex Audiocom US-2002 2-channel user/main station + ES4000A 4-channel expansion station. Combined 6-channel rack intercom pair. Used, tested working.

Manufacturer: Telex Communications, Inc. (Audiocom / RTS intercom line, Minneapolis, MN, USA). Now part of RTS/Bosch. Professional party-line (PL) wired intercom used in broadcast, live production, theaters, houses of worship, and industrial comms.

What you get:

1x Telex Audiocom US-2002 (SN 0540) — 2-channel user/main station
1x Telex Audiocom ES4000A (SN 0538) — 4-channel expander
2x original-style 12–15 VDC wall-wart power supplies
Units are 1/2-rack each and currently connected as a 1U 19" pair

Condition: Used. Normal rack scuffs and marks. Buttons and labels intact. Tags from ODS Divestment 2023: “Tested Good: 20 JAN 2023.” Sold as used/tested working. No headset, gooseneck mic, or rack ears beyond what’s on the units.

Key features (US-2002 + ES4000A):

Balanced Audiocom or unbalanced Clear-Com compatible (rear BAL/UNBAL switch)
Digi-Latch Talk / Listen / Call buttons (backlit)
Remote Mic Kill, All Talk, PA output, VOX
Headset jack: XLR-4M (dynamic mic)
Panel/gooseneck mic: 1/4" locking
Program inputs (DB-9)
Speaker / line-level outputs (RCA)
Channel XLRs (loop-through)
Expansion link so more ES-4000A units can be daisy-chained (up to 18 channels total with additional expanders)
Local 12–15 VDC power or phantom from a party-line PSU (PS-2001L / PS-4001 class)

US-2002 specs (abbrev.):

Phantom: 24 VDC nominal (18–30 V), 65–150 mA
Local power: 12–15 VDC, 65–150 mA
Freq response: 200 Hz–8 kHz
Headset: 50–200 Ω dynamic mic, 150–600 Ω phones
Size: 1.75" H × 8.25" W × ~10.3" D, ~2 lb
Channels 1–2 on rear XLR-3 M/F pairs

ES4000A specs (abbrev.):

Adds channels 3–6 with Talk/Listen/Call per channel
Same BAL/UNBAL and program-input architecture
Speaker outs (RCA) per added channel
Size: 1.75" H × 8.25" W × 10" D
Same local/phantom power as US-2002

Ideal spare, small studio PL system, or expansion for an existing Audiocom/RTS 2000-series setup.