Circuit Atlas · HUSH M4 · Rev 2027.4 draft

4 Signal flow

The order of stages in each strip and in the master path.

IN DEVELOPMENT · REV 2027.4 (DRAFT) · DESIGN TARGETS, NOT MEASUREMENTS

HUSH M4 is in development. This draft is published on zakkhutoretsky.com; it has no price and no ordering. Figures marked design target are goals for the finished product. Figures marked calculated come from the published formulas. No value on these pages was measured on a built unit. Interviews are cited as the design brief, not as an endorsement.

See this control Signal path at a glance

4 Signal flow

Each of the four strips runs input select, trim, four-band EQ, filter and fader, in that order, with a pre-fader cue tap. The strips sum into the master bus; the master isolator and the (switchable) FX loop follow, then the master fader and the balanced output drivers. The cue bus and headphone amplifier sit beside the master path. A single linear supply feeds everything. The whole path is analogue.

HUSH M4 block diagramSignal flow from four identical input channels, through the master section and FX loop, to the outputs and cue/headphone path, powered by a linear supply.BLOCK DIAGRAM — signal flowCHANNEL STRIP × 4 (identical)PHONOS1 RIAALINES2 trimSELECTPH / LNEQ 4-bandS13 + S3aFILTERS4 HPF / LPFFADERS5 VCACUE TAP / SUMpre-fader cue tapchannel outputs to the master busMASTER SUMS7MASTER ISOS3bFX LOOPS6 switchableMASTER FADERS7BALANCED OUTS7MASTER XLRBOOTH XLRREC RCAcue taps from each strip (pre-fader) feed the cue bus:CUE BUS + BLENDS7HEADPHONE AMPS8PHONES 6.35 / 3.5 mmPOWER SUPPLY S9±18 V regulated (LM317 / LM337), 5 V reference, star ground, double-insulated mains transformerIn development. Analogue path throughout: no converters in the path. The optional USB-C interface (S10) taps it; noscreens.
Block diagram Swipe sideways to pan on a phone.

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