Sonic Synths Power Supply Board EU14BR
Sonic Synths Power Supply Board EU14BR
Part No: 7218-151
Our standard Eurorack power supply board that accepts a 15Vdc input and will generate the +/-12V supplies to each of... Read more
£74.17 Excl. VAT
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Our power supply and distribution boards are all designed to slide into the System 345 extrusion sides. No fixings required and the components are all concealed within the extrusion. This means the full depth of the case is available for your modules.
At the time of writing, these boards do not have mounting holes for applications outside of our extrusion cases. However, the top and bottom edges are free from PCB traces so should not present any difficulties in drilling some mounting holes.
| Parameter | Value | Condition | Notes |
| Power Supply Specification | |||
| Power Supply Model Fitted | EU14BR | ||
| Power Supply Type | Common regulation | Switch-mode | |
| No Load Current | 33mA | ||
| Input Voltage | 15Vdc | ||
| Output Connector Type | 10-pin Boxed Headers | ||
| Fused | Yes | ||
| Switched | Yes | ||
| Output 1 | |||
| Voltage | +12V | ||
| Adjustable or Fixed Voltage | Adjustable | ||
| Recommended Maximum Load Current | 1000mA | ||
| Maximum Load Current | 2000mA | ||
| Minimum Load Current | 100mA recommended | ||
| Line Regulation | 2.6% | Input 14.5V to 15V | |
| Load Regulation | 0.65% | 100mA to 1000mA | |
| RMS Noise | <3mV @ 500mA, <8mV @ 2000mA | ||
| Pk-Pk Noise | <10mV@500mA , <25mV@2000mA | At output connector | 20MHz bandwidth |
| Current Limiting | Indirect, limited protection | ||
| Peak Efficiency | 84% | @1A | |
| Output 2 | |||
| Voltage | -12V Outlet sockets 1 to 7 | ||
| Adjustable or Fixed Voltage | Fixed, approx -12.4V off load | ||
| Recommended Maximum Load Current | 500mA | ||
| Maximum Load Current | 1000mA | ||
| Minimum Load Current | 0mA, recommended 50mA | ||
| Line Regulation | 1.2% | Input 14.5V to 15V | |
| Load Regulation | 1.24% | 100mA to 500mA | |
| RMS Noise | <2mV | @500mA | |
| Pk-Pk Noise | <10mV | @500mA | |
| Current Limiting | Indirect, limited protection | ||
| Peak Efficiency | 76% | @500mA | |
| Output 3 | |||
| Voltage | -12V Outlet sockets 8 to 14 | ||
| Adjustable or Fixed Voltage | Fixed, approx -12.4V off load | ||
| Recommended Maximum Load Current | 500mA | ||
| Maximum Load Current | 1000mA | ||
| Minimum Load Current | 0mA, recommended 50mA | ||
| Line Regulation | 1.2% | Input 14.5V to 15V | |
| Load Regulation | 1.19% | 100mA to 500mA | |
| RMS Noise | <2mV | @500mA | |
| Pk-Pk Noise | <10mV | @500mA | |
| Current Limiting | Indirect, limited protection | ||
| Peak Efficiency | 76% | @500mA | |
| Power Supply PCB | |||
| Ground plane Impedance | 9mΩ | Measured between J3 & J6 | |
| Ground Plane Volt drop | 9mV/A, (Ratio 10.7%)* | Measured between J3 & J6 | |
| Output 1 PCB Volt Drop |
50mV/A, (Ratio 60%)* 17mV/A, (Ratio 20%)* |
L5 to J8-1 L5 to Expansion port |
|
| Output 2 PCB Volt Drop | 30mV/A radial distribution, (Ratio 36%)* | Measured between J8-1 & J8-7 | |
| Output 3 PCB Volt Drop | 50mV/A, (Ratio 60%)* | Measured between J8-8 & J8-14 | |
| Pass Through Input Voltage PCB Volt Drop | 67mV/A, (Ratio 80%)* | Measured between S1 & J4 |
Noise tests at 20MHz bandwidth
* When compared to IDC ribbon cable of same length
The EU14BR fitted to the 84HP Powered Skiff is a regulating power supply board with a large ground plane which is essential in modular synthesizer power supplies. It helps reduce noise and electromagnetic interference (EMI), ensuring better signal integrity and stable power delivery. They also provide a low-impedance path for return currents, which is crucial for maintaining performance in both digital and analogue circuits. The impedance of the EU14BR ground plane is just 9mΩ which is 9 times lower than a similar length of IDC ribbon cable used by some manufacturers.
The incoming 15Vdc supply is plugged into the 2.1mm socket from which is generated two -12V supplies (headers 1-7 and 8-14 respectively) and an adjustable +12V supply. These supplies are then distributed to the 14 x 10-pin box headers.
The EU14BR can also be used for power supply and distribution in larger systems. J4 and J6 are used for 6U systems and the expansion port is used for the 104HP with the optional EU03BRX or 20U systems with the optional M210BRX systems. These connectors are not fitted as standard except when supplied as part of a larger case / skiff.
For 6U systems, J4 and J6 are cabled to the slave EU14BR. The two boards are simply cabled together: J4 to J5 and J6 to J7. The slave board does not have power switch S1 installed which reveals J5.
Not yet available
Sonic Synths System 345 is a modular analogue Synth enclosure that has versatility at the core of its design. Based around Sonic Synths unique and exclusive aluminium extrusion design, it is not constrained to any particular modular format. Starting with the Eurorack format, the range will be expanded to include 4U and 5U and even these have differing sub-formats such as the 5U MOTM, M² & MU.
System 345 launched in September 2025 initially with the 84HP Eurorack format. During the remainder of 2025 and beyond, further formats and widths will be added. Another nice feature is you can mix different formats in the same vertical rack of most cases.
Equally important and not an area to compromise in is the power supply. The System 345 excels with the number of different solutions for different modular formats. Whether this is module voltage, power lead connectors or module spacing, the System 345 aims to cover as many as practicable. From distribution only (DO), standard power supplies (BR) through to the fully featured FR range that offers individual voltage regulation at each and every module power connector.
The power supply board slides into the aluminium extrusion and requires no fixings.
The System 345 power supplies have been designed to keep noise on the power rails low, <10mV peak to peak is typical even on the BR range.