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PCB Mechanical Envelope
Purpose
Define the first-pass mechanical and PCB packaging envelope for enclosure modeling and electronics partitioning.
Exterior Reference Envelope
- Product width: 220 mm
- Product height: 125 mm nominal
- Product depth: 95 mm nominal
Internal Zoning Strategy
- Front center: display module and light pipe or window subassembly
- Front left/right: speaker zones and knob mechanical volumes
- Mid-body: primary PCB zone
- Lower rear or lower center: rechargeable battery pack zone
- Upper rear or side rear: antenna keep-out region for WiFi/Bluetooth
- Rear wall: charge/power connector and optional service/debug access
Main PCB Assumption
- Single primary PCB preferred for cost and assembly simplicity
- Initial PCB bounding target: 140 mm to 170 mm wide, 45 mm to 70 mm tall depending on audio and power partitioning
- PCB likely mounted behind front control cluster or slightly rear-shifted to preserve acoustic volume
Display Subassembly Envelope
- Display visible window baseline: 62 mm x 22 mm
- Internal module allowance should include bezel, mounting, connector bend radius, and standoff depth
- Reserve front-center depth allowance of approximately 8 mm to 18 mm depending on display selection
Knob and Encoder Envelope
- Two front knobs approximately 32 mm diameter baseline
- Reserve mechanical keep-out behind each knob for shaft encoder or potentiometer body plus harness/connector clearance
- Maintain hand clearance and structural rigidity at front panel mounting points
Speaker Envelope Assumptions
- Preserve left and right front cavity regions for drivers and acoustic treatment
- Electronics should not excessively intrude into speaker depth or front radiation path
- Final acoustic volume to be refined after driver choice
Battery Envelope Assumptions
- Rechargeable battery intended for a few hours unplugged runtime
- Reserve protected battery compartment or bracketed internal space low in the enclosure for center-of-gravity stability
- Battery should be isolated from hot amplifier and RF-sensitive zones where practical
Antenna Constraints
- Provide non-metallic enclosure region near antenna placement
- Keep dense ground, battery metal, speaker magnets, and shielding away from immediate antenna near-field volume as much as feasible
- Do not place antenna directly behind a metal grille if avoidable
Connector and Service Envelope
- Rear connector zone should accommodate charging input and possible USB/service interface
- Provide assembly access for battery connection and display interconnect
- Keep serviceable items away from speaker screws where possible
Mechanical Risks to Track
- Display depth conflicts with front structure
- Battery volume reducing acoustic chamber size
- Antenna detuning from nearby metal and battery placement
- Thermal buildup in enclosed wood-look cabinet construction
- Knob shaft alignment tolerance stack-up
Outputs This Document Supports
- enclosure CAD model
- PCB outline exploration
- component height budgeting
- mounting boss planning
- front panel stack-up design
Purpose
Exterior Reference Envelope
Internal Zoning Strategy
Main PCB Assumption
Display Subassembly Envelope
Knob and Encoder Envelope
Speaker Envelope Assumptions
Battery Envelope Assumptions
Antenna Constraints
Connector and Service Envelope
Mechanical Risks to Track
Outputs This Document Supports