NEW Audio amplifier kits, modules and many others.

[DAKOS]

i guess was down for 10 min or so..it's working for me too now

[MartinQ]

It's working now, but I was getting DNS errors about 5 minutes ago.

[Cristi]

i'm sorry if the website cannot be accessed. It may be possible that the website to be down for few minutes, i try to make some updates and changes. if you cannot connect, please try again after half hour, or so. you also can send me mail, i will answer to it.

[samsagaz]

Welcome! i will test some of your designs.

[spgjmf]

Hi,

I aminterested in the TDA8920 pcb. can you post the hook up info and power requirements. alos, what is shipping to the USA for the kit?

thanks and good luck with business,

JEff

[Cristi]

TDA8920 amplifier requires 2x18 - 2x20 V AC at 5A for proper operation. for shipping cost, please login ont the site, and follow the steps for order

[dgm]

I am interested in the SPC1 speaker protection module. Can you provide some details of this module please? eg
1) circuit description - ie what it senses and the levels etc that will cause it to switch
2) adjustability - eg sensitivity of DC protection (I am having problems with a too sensitive protection circuit at the moment)
3) power supply requirements (I only have +/-12v)
4) if it has AC sense based on transformer secondary sensing (which I dont want since Im using an SMPS) and whether this can be bypassed if using an smps
5) mono or stereo
6) How is short circuit protection implemented?
7) limitations (voltages for speaker and for its own supply)
etc...

A circuit diagram would address most of these questions.
Thanks,
Derick

[e_fortier]

Hi Jeff,

I jst purchased 2 x TDA8920BTH (the B version if important if still available) each configured in bridge mode. This gives you roughly 130 W @ 8 ohm, for this I purchase a 2 x 20Vac, 400VA transformer. This IC is internally limited to 8A so I guess 300VA would be OK

Here are some notes I received from cnx regarding the pinout;

'The TDA8920 heatsink must be electrically (not thermally) isolated from the IC, this is connected to V- not to GND. Insert one strip of insultaing material which u should place between HeatSink and IC.

The boards have screw type terminal block (the green connectors) for power and output. For input i suggest to solder the wires, directely to the pins which i attached.

Power connector:
1; AC1 in,
2,3; GND
4;AC2 In

Spk connector:
1 OutL
2, GND L,
3, GND R,
4 Out R.

Input connector:
1. Left Input
2. GND
3. Mode (Mute, ST-by, ON)
4. GND
5. Right Input

Note that input L and R are shifted 180 degrees, so you need to connect one loudspeaker with + at GND. this is usefull when u want to use in BTL mode, just connect both inputs togeteher and the load between two outputs.'

Hope this helps,
Eric

[Cristi]

dgm,
the speaker protection board is built arround upc1237 ic. it monitors 2 channels, for a stereo amplifier. it senses the presence of DC component on the output of the amplifier and disconnect the relay. the sensing sensitivity is arround 2-5V DC and can be modified by changing the values of onboard resistors. the power supply requirement is 10-15V AC and uses a separate winding both for power and sense. can be powered from smps also, but the ground need to be galvanic isolated from the main ground. the maximum power for which can be used is 400W and can be increased by changing the components values. the shortcircuit protection has not been implemented on this board.

[cirrus18]

Hi Cristi,

I am interested in the TDA8924 amplifier and I would require six of them for an active crossover system I'm building if suitable.

Would you consider these amplifiers to be of audiophile quality or not?

Where can I get to see the spec sheets for them?

many thanks.