Altec 15356A Stereo Transformer Mix Box / Passive Line Processor

Altec 15356A Stereo Transformer Mix Bus / Passive Line Processor

• Matched Pair (<2%) • Variable Load • True Bypass • Ground Lift • Zobel Stability Network
• Custom-built passive stereo transformer processor using a matched pair of vintage Altec 15356A 600 Ω line transformers. Designed for mix bus, stems, and hybrid workflows where controlled transformer loading adds subtle cohesion, depth, and harmonic density.
• Fully passive signal path — no power required.
• WE-style 600 Ω transformer loading with controlled broadband line isolation and subtle phase density characteristic of broadcast-line signal practice. Full-bandwidth passive transformer coupling with naturally occurring harmonic structure and mix cohesion under defined termination.

FEATURES

• Matched vintage Altec 15356A transformers (<2%)
• Variable load control for adjustable transformer interaction
• Integrated Zobel network for HF stability
• True bypass for instant A/B comparison
• Ground lift options for system integration
• Passive design (no power supply)

SOUND CHARACTER

Subtle, source-dependent transformer behavior rather than overt coloration.

• mix bus glue and cohesion
• low-mid density and focus
• gentle transient smoothing
• harmonic complexity from passive transformer interaction
• full-bandwidth response under controlled loading

Best on mix bus, stems, drums, synths, and hybrid analog chains.

Built, fully tested, and ready to ship.