Soundcraft - S200 8ch Analogue mixer

The Soundcraft Series 200 (including its variants: original 200, 200B, and 200SR) in its 8-channel frame configuration—typically configured as 8/4/2 (8 mono inputs, 4 subgroup buses, 2 master stereo outputs)—is a modular analog mixing console built around a 19-inch rack-mountable steel chassis. 
Key technical breakdown, signal flow, and hardware specifications for the 8-channel model:
Key Specifications & Architecture

The Soundcraft Series 200 (including 200, 200B, and 200SR variants) in its 8-channel configuration is a modular analog mixing console built into a 19-inch rack-mountable or tabletop steel chassis with an 8/4/2 architecture, comprising 8 mono input channels, 4 subgroup buses, and 2 main stereo outputs. Operating at a nominal level of \bm{+4\text{ dBu}} with electronically balanced I/O, the console is powered by an external 2U rack-mount power supply delivering 17 rails and +48 DC phantom power. Each mono input channel includes an electronically balanced XLR mic input with a \bm{-20\text{ dB}} pad, a \bm{\frac{1}{4}}" TRS line input, a dedicated TRS channel insert, a 4-band fixed-frequency EQ pm 15 dB shelving at 12 kHz. and 60 hz peaking filters at 5 kHz and
250 Hz , 4 auxiliary sends configurable via internal jumpers, bus assignment pan and routing, a PFL solo switch, a peak LED indicator, and a linear fader. The master section features 4 subgroups with insert points and 8-track tape returns, slate/talkback routing, an internal calibration oscillator, control room monitoring, and 4 illuminated VU meters assigned to groups, mix, or PFL/AFL signals.

Channel Strip Architecture
Each of the 8 mono input channels features a discrete, high-headroom input preamplifier and modular PCB construction:
Preamplifier & Input Section:
Mic Input: Electronically balanced XLR (impedance \bm{>2\text{ k}\Omega}) with a \bm{-20\text{ dB}} pad switch. 
Line Input: Electronically balanced \bm{\frac{1}{4}}" TRS jack (impedance \bm{>10\text{ k}\Omega}). 
Phantom Power: \bm{+48\text{V}} DC phantom power, switchable per channel on the rear or via global PSU depending on the revision. 
Channel Insert: \bm{\frac{1}{4}}" TRS send/return point on every channel (post-preamp / pre-EQ).
4-Band Equalizer (Fixed Frequency):
HF: \bm{\pm 15\text{ dB}} shelving at \bm{12\text{ kHz}} 
HI-MID: \bm{\pm 15\text{ dB}} peak/dip (bell curve) centered at \bm{5\text{ kHz}} 
LO-MID: \bm{\pm 15\text{ dB}} peak/dip (bell curve) centered at \bm{250\text{ Hz}} 
LF: \bm{\pm 15\text{ dB}} shelving at \bm{60\text{ Hz}} 
Note: All EQ pots feature center detents for zeroing. 
Auxiliary Sends & Routing:
4 Aux Sends: Configurable via internal PCB jumpers (Options: Pre-EQ/Pre-fader, Post-EQ/Pre-fader, or Post-EQ/Post-fader). 
Bus Assignment: Panning pot with direct routing switches to Groups 1-2, Groups 3-4, and Stereo Main Bus. 
Monitoring & Fader: Pre-Fade Listen (PFL) solo button, Peak LED indicator (illuminates \bm{4\text{ dB}} prior to clipping at insert send), and \bm{100\text{mm}} long-throw linear faders. 
Master & Subgroup Section
4 Subgroups: Each subgroup features an insert jack, tape return level/pan controls for 8-track monitoring, auxiliary return controls, and routing to the main L/R stereo bus.
Talkback & Test Oscillator: Built-in slate/talkback mic routing to auxiliaries or groups, alongside an internal test oscillator for system calibration.
Monitoring: Comprehensive C-RM (Control Room Monitor) controls with source switching (Mix, 2-Track Tape Return, PFL/AFL) feeding dedicated monitor outputs and a headphone output (\bm{200\text{--}400\,\Omega} load target).