# Blue Ant AMP Architecture Rev2 Six Board System ## Description Single-project implementation of the Blue Ant AMP Architecture Rev2 using one shared schematic with six logical board partitions: PCB-01 phono stage, PCB-02 input selector and relay attenuator interface, PCB-03 balanced driver and RCA-to-balanced conversion interface, PCB-04 dual logical power amplifier channels, PCB-05 multi-rail power supply, and PCB-06 isolated control and display. Explicit inter-partition connector interfaces and named nets preserve balanced signal handling after RCA conversion, distinct rail domains (+63V, -63V, +15V, -15V, +5V, +3.3V), and documented hard constraints including low-noise analog isolation and high-voltage domain separation. ## Project Details - **Owner:** blueant - **Created:** 3/12/2026 - **Last Updated:** 3/19/2026 - **Visibility:** Public - **Reliability Target (MTBF):** Premium audio - low noise focus - **Connector Partition Notes:** PCB-01 boundary: J101/J201. PCB-02 to PCB-03 boundary: J202/J301. PCB-03 to PCB-04 left boundary: J302/J401. PCB-03 to PCB-04 right boundary: J303/J402. PCB-05 power distribution boundaries: J501/J502/J503. PCB-06 control boundary: J601. External interfaces: J1 XLR input 1, J2 XLR input 2, J3 XLR pre-out, J4 RCA line in, J5 phono in, J6 USB-B firmware, J7/J8 speaker outputs, J9 trigger I/O. - **Signal Handling Notes:** RCA line input is permitted and is converted to balanced immediately at the PCB-03 interface. From the phono output onward and after RCA conversion, inter-partition audio transport is represented as explicit balanced P/N signal pairs with separate shield references. - **System Architecture:** ```mermaid flowchart TD subgraph PCB01 [PCB-01 Phono Stage] A1[Phono In] --> A2[MM MC Gain and RIAA] A2 --> A3[Subsonic and Servo] A3 --> X1[To PCB-02] end subgraph PCB02 [PCB-02 Input Select and Attenuator] B1[Balanced Inputs] --> B3[Input Select] B2[RCA In] --> B4[RCA to Balanced] B4 --> B3 X1 --> B3 B3 --> B5[Relay Attenuator and Mute] B5 --> X2[To PCB-03] end subgraph PCB03 [PCB-03 Balanced Driver] X2 --> C1[Balanced Buffer Driver] C1 --> X3L[To PCB-04 Left] C1 --> X3R[To PCB-04 Right] C1 --> X4[Balanced Pre Out] end subgraph PCB04 [PCB-04 Dual Logical Channels] X3L --> D1[Left Power Amp] X3R --> D2[Right Power Amp] D1 --> E1[Left Speaker Out] D2 --> E2[Right Speaker Out] end subgraph PCB05 [PCB-05 Power Supply] P1[AC Input and Rectification] --> P2[Main Rails] P2 --> P3[Analog Rails] P2 --> P4[Control Rails] end subgraph PCB06 [PCB-06 Control and Display] F1[Display and Knob] --> F2[Control Logic] F2 --> F3[Mute Relay Control] end P2 --> R1[+63V and -63V] P3 --> R2[+15V and -15V] P4 --> R3[+5V and +3V3] R1 --> D1 R1 --> D2 R2 --> A2 R2 --> B3 R2 --> C1 R3 --> F2 F2 --> B5 F2 --> C1 ``` - **Hard Constraints:** 1) No unbalanced signal path after cartridge input; balanced handling preserved after RCA conversion. 2) No electrolytic capacitors in any audio signal path. 3) No switching components within 150 mm of any audio trace on PCB-01, PCB-02, or PCB-03. 4) Distinct rail domains must remain explicit: +63V, -63V, +15V, -15V, +5V, +3.3V. - **Power Requirements:** Rail domains: +63V, -63V main power; +15V, -15V analog; +5V control; +3.3V control logic. Balanced signal handling required after RCA conversion. Hard constraints: no unbalanced signal path after cartridge input, no electrolytic capacitors in audio signal path, and no switching components within 150 mm of low-level audio traces. - **Domain:** High-end audio amplifier, mixed-signal, multi-rail, single-project six-board partitioned architecture - **Author:** Flux Assistant - **Manufacturing Quantity Target:** 25-50 units/year - **Layout Placeholder Note:** Single rectangular layout placeholder fixed at 140 mm x 90 mm. This layout boundary is a placeholder only and represents the unified project container for six logical schematic partitions (PCB-01 through PCB-06, with dual logical channels on PCB-04). - **Rail Domain Map:** Main power domain: RAIL_MAIN_POS_63V_L, RAIL_MAIN_NEG_63V_L, RAIL_MAIN_POS_63V_R, RAIL_MAIN_NEG_63V_R, RAIL_PGND_L, RAIL_PGND_R. Analog domains: RAIL_A_POS_15V, RAIL_A_NEG_15V, RAIL_B_POS_15V, RAIL_B_NEG_15V, PCB01_TO_PCB02_AGND, PCB02_TO_PCB03_AGND. Control domains: RAIL_CTRL_5V, RAIL_CTRL_3V3, RAIL_DGND, CTRL_AUDIO_MUTE_ISO, CTRL_TRIGGER_IN, CTRL_TRIGGER_OUT, CTRL_IR_RX, CTRL_DISPLAY_LINK. ## Key Components ### J1 — [XLR-328P](https://www.flux.ai/lcsc/xlr-328p.md) - Role: External Connector - Manufacturer Part Number: XLR-328P - Role Details: Balanced XLR input 1 placeholder for source input - Package or Case Code: CONN-TH_XLR-328P - LCSC Part Number: C309326 - JLCPCB Part Class: Extended Part - Part Type: Circular Connectors & Cable Connectors - Product Info Url: https://lcsc.com/product-detail/Others_HOOYA-XLR-328P_C309326.html - Manufacturer Name: HOOYA(皓宇电子) - Package: Through Hole XLR 3-pin - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_HOOYA-XLR-328P_C309326.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J101 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Package: Through Hole Header 1x08 2.54mm - Role Details: PCB-01 to PCB-02 interface: balanced phono out, analog rails, ground, shield, and control - Part Type: Connector - Role: Partition Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J2 — [XLR-328P](https://www.flux.ai/lcsc/xlr-328p.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_HOOYA-XLR-328P_C309326.pdf - Role: External Connector - Manufacturer Name: HOOYA(皓宇电子) - Package: Through Hole XLR 3-pin - Part Type: Circular Connectors & Cable Connectors - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Others_HOOYA-XLR-328P_C309326.html - LCSC Part Number: C309326 - Package or Case Code: CONN-TH_XLR-328P - Manufacturer Part Number: XLR-328P - Role Details: Balanced XLR input 2 placeholder for source input **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J201 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: PCB-02 side of PCB-01 to PCB-02 interface - Package: Through Hole Header 1x08 2.54mm - Part Type: Connector - Role: Partition Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J202 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Role Details: PCB-02 to PCB-03 interface: balanced attenuator out, analog rails, mute and control - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Package: Through Hole Header 1x08 2.54mm - Role: Partition Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J3 — [XLR-328](https://www.flux.ai/lcsc/xlr-328.md) - Product Info Url: https://lcsc.com/product-detail/Others_HOOYA-XLR-328_C309327.html - Manufacturer Part Number: XLR-328 - Manufacturer Name: HOOYA(皓宇电子) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_HOOYA-XLR-328_C309327.pdf - Role Details: Balanced XLR pre-out placeholder after volume and buffer - Role: External Connector - LCSC Part Number: C309327 - Part Type: Circular Connectors & Cable Connectors - Package: Through Hole XLR 3-pin - Package or Case Code: CONN-TH_XLR-328 - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J301 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Part Type: Connector - Role Details: PCB-03 side of PCB-02 to PCB-03 interface - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole Header 1x08 2.54mm - Role: Partition Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J302 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Package: Through Hole Header 1x08 2.54mm - Role Details: PCB-03 to PCB-04 left interface: balanced drive, main rails, speaker return reference and control - License: https://creativecommons.org/licenses/by/4.0/ - Role: Partition Connector - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J303 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Partition Connector - Role Details: PCB-03 to PCB-04 right interface: balanced drive, main rails, speaker return reference and control - Part Type: Connector - Package: Through Hole Header 1x08 2.54mm **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J4 — [RCA Vertical - RCJ-024](https://www.flux.ai/404src/rca-vertical-rcj-024.md) - Part Type: Connector - Purchase Url: https://www.mouser.com/ProductDetail/CUI-Devices/RCJ-024?qs=WyjlAZoYn510/RpqUQhCng%3D%3D - Datasheet URL: https://www.mouser.com/datasheet/2/670/rcj_02-3159322.pdf - Package: RCA Vertical - Role: External Connector - Manufacturer Name: CUI Devices - Role Details: RCA line input placeholder feeding immediate RCA-to-balanced conversion - Manufacturer Part Number: 490-RCJ-024 **Pins:** - GND [pin 2] - GND [pin 2] - In [pin 1] ### J401 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Role: Partition Connector - Role Details: PCB-04 left side of PCB-03 to PCB-04 left interface - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole Header 1x08 2.54mm **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J402 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Role Details: PCB-04 right side of PCB-03 to PCB-04 right interface - Package: Through Hole Header 1x08 2.54mm - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Partition Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J5 — [RCA Vertical - RCJ-024](https://www.flux.ai/404src/rca-vertical-rcj-024.md) - Package: RCA Vertical - Role: External Connector - Part Type: Connector - Datasheet URL: https://www.mouser.com/datasheet/2/670/rcj_02-3159322.pdf - Purchase Url: https://www.mouser.com/ProductDetail/CUI-Devices/RCJ-024?qs=WyjlAZoYn510/RpqUQhCng%3D%3D - Role Details: Phono input placeholder for cartridge signal into PCB-01 - Manufacturer Name: CUI Devices - Manufacturer Part Number: 490-RCJ-024 **Pins:** - GND [pin 2] - GND [pin 2] - In [pin 1] ### J501 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Role Details: PCB-05 to analog chain rails: +15V, -15V, +5V, +3.3V, AGND, DGND, mute and status - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Package: Through Hole Header 1x08 2.54mm - Role: Partition Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J502 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Part Type: Connector - Role Details: PCB-05 to PCB-04 left power distribution: +63V, -63V, PGND, speaker return, enable and fault - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole Header 1x08 2.54mm - Role: Partition Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J503 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: PCB-05 to PCB-04 right power distribution: +63V, -63V, PGND, speaker return, enable and fault - Part Type: Connector - Role: Partition Connector - Package: Through Hole Header 1x08 2.54mm **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J6 — [61729-1011BLF](https://www.flux.ai/adrian95/61729-1011blf.md) - Datasheet URL: https://www.amphenol-cs.com/media/wysiwyg/files/drawing/61729.pdf - Manufacturer Name: Amphenol ICC (FCI) - Manufacturer Part Number: 61729-1011BLF - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB-B firmware update connector placeholder for isolated control board - Role: External Connector - Part Type: Connector - Package: Through Hole USB-B **Pins:** - D- [pin 2] - D+ [pin 3] - GND [pin 4] - SHIELD [pin S2] - SHIELD [pin S1] - VCC [pin 1] ### J601 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole Header 1x08 2.54mm - Role: Partition Connector - Role Details: PCB-06 control distribution: +5V, +3.3V, DGND, isolated mute, trigger, IR, display and control bus **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J7 — [Connector 01x04_2.00mm](https://www.flux.ai/jecstronic/connector-01x042p00mm.md) - Role: External Connector - Role Details: Left speaker output placeholder including hot and return references - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole Header 1x04 2.00mm **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### J8 — [Connector 01x04_2.00mm](https://www.flux.ai/jecstronic/connector-01x042p00mm.md) - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole Header 1x04 2.00mm - Role: External Connector - Part Type: Connector - Role Details: Right speaker output placeholder including hot and return references **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### J9 — [Connector 01x04 Horizontal](https://www.flux.ai/jharwinbarrozo/connector-01x04-horizontal.md) - Role: External Connector - Part Type: Connector - Role Details: 12V trigger in and trigger out placeholder connector - Package: Through Hole Header 1x04 2.54mm **Pins:** - PIN_1 [pin 1] - PIN_2 [pin 2] - PIN_3 [pin 3] - PIN_4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/blueant/blue-ant-amp-architecture-rev2-six-board-system](https://www.flux.ai/blueant/blue-ant-amp-architecture-rev2-six-board-system).* --- *Generated from [https://www.flux.ai/blueant/blue-ant-amp-architecture-rev2-six-board-system](https://www.flux.ai/blueant/blue-ant-amp-architecture-rev2-six-board-system)*