Vintage Ampex 403 Mic Preamp w/ UTC HA-100X & HA-133 Transformers

Best for

Players matching the published factory/retail specs listed above.

Watchouts

Unsourced claims are omitted. Listing-specific mods, kits, or incomplete units may not match the base model specs.

Likely add-ons

• appropriate cables
• monitoring solution
• mount or stand if relevant

Verify before buying

• Can you confirm exactly what is included in the sale and show it in current photos?
• Are there any functional issues, repairs, or missing parts not shown in the listing?
• Can you provide close-up photos of wear points, serial numbers, and any modifications?
• Can you confirm the core specs that matter for compatibility in this setup?
• Is this still available and has anything changed since the listing was posted?