242 [WRMS] single channel audio amplifier core

Name: 242 [WRMS] single channel audio amplifier core
SKU: 17680
Price: 99.90 USD
Availability: InStock

High end, powerful, low noise design, providing an amazing sound

Designed by Joël Huser Électronique in Switzerland

242 [WRMS] single channel audio amplifier core 1

242 [WRMS] single channel audio amplifier core 2

242 [WRMS] single channel audio amplifier core 3

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242 [WRMS] single channel audio amplifier core 10

242 [WRMS] single channel audio amplifier core 11

242 [WRMS] single channel audio amplifier core 12

242 [WRMS] single channel audio amplifier core 13

242 [WRMS] single channel audio amplifier core 14

242 [WRMS] single channel audio amplifier core 15

242 [WRMS] single channel audio amplifier core 16

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High end, powerful, low noise design, providing an amazing sound

The people who listened to the sound that comes out of this board were amazed. I play saxophone and I'm very difficult about the sound which is coming out of a speaker. And yet, I DEFINITELY LOVE thi…

The people who listened to the sound that comes out of this board were amazed. I play saxophone and I'm very difficult about the sound which is coming out of a speaker. And yet, I DEFINITELY LOVE this sound!

Based on a published electronic circuit, I redrew the board and optimized the choice of the components, the electrical specifications, the heat's dissipation, the PCB technology, the tracks width and the connection of the cables on the PCB, in such a way to improve the sound's quality. This product fully applies RoHS standards.

I'm proud to present you this dazzling, pure and powerful class AB low noise analog amplifier board, which is very small if we consider the output power: only 38 electronic components on a 82 x 94.5 [mm] FR4 board for 242 [WRMS] output power without any visible distortion or oscillation! I've oversized almost every component and most of them are no more through hole but now SMD type. Moreover, I've put many holes around the resistors and the diodes to dissipate the heat through the circuit. And I don't use connectors, but only wires soldered directly on the PCB.

Electrical Specifications:

Minimum speaker's load of 4 [Ω] allowed.
Measured 156 [WRMS] on a 8 [Ω] resistive load with a +/- 60 [V] power supply and a supply current of +/- 2.4 [A].
Measured 242 [WRMS] on a 4 [Ω] resistive load with a +/- 60 [V] power supply and a supply current of +/- 4.3 [A].
Measured 5 [Hz] to 40 [kHz] bandwidth at -3 [dB].
12 [kOhms] input impedance.
1 [VAC] input sensitivity.
Main capacitors of minimum 2 x 20'000 [uF] 63 [V] required.
Main toroidal transformer of 500 [VA] with 2 x 40 [VAC] secondary outputs required.
Accepts main DC voltages of +/- 60 [V] maximum.
Needs a section of 4 [mm2] for wires of the +60 [V], -60 [V] and speaker output.
Needs a section of 6 [mm2] for the ground wire.
Needs a very good audio shielded wire for the audio signal input.

Each board is washed and tested before shipment. This product is not a kit to mount by yourself but comes to you fully assembled. However, the attached design files give you all the informations if you would like to build the circuit by yourself from zero:

The electronic schematic in PDF.
The top layer layout in PDF with components referencies.
The bottom layer layout in PDF with components referencies.
The BOM in PDF with links to farnell.com components web pages. Electronic components are also available on other online markets.
The GERBER files for PCB fabrication in ZIP. You can chose the color of the board, it's one of the advantages to mount the board by yourself! If you don't know any PCB supplier in your area yet, Google is your best friend, there are lots of companies in this field.
The mechanical schematic of the aluminium part in PDF.

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