4x100W Amp Build

[Ron_E]

I picked up one of the TK2050 4x100W Dayton amp boards recently. http://www.parts-express.com/4x100w-...board--320-335

The 28V PS I ordered from China came today. http://hifimediy.com/index.php?route...&product_id=71 I ordered the PS March 21st and it cost $20 to ship. This PS comes from the factory set at 28V but has a trim adjustment you could bump up to 30V. It also has an small split Aux output that measures +/- 11V. I found the board I got differs from the board on the web site. The web picture show 2 output terminals labeled Negative and Positive Out. The board I got has 3 terminals labeled Negative Out, GND Out and Positive Out. The Negative Out output is tied to the Positive Out and both measure 28V relative to GND Out. There was no documentation with the PS so I had to figure out the output configuration as well as the power input terminals whose labels are obscured by the terminal block. I chose this PS because it has high efficiency and no fan.



This will take a while to put together since I still need to get the rest of the hardware together. I'll certainly be looking at the cases from another recent thread.

Ron

[Mike220]

Re: 4x100W Amp Build

Sub'ed ill be looking forward to reading this and hearing your results. Seems like a mighty cheap amp if it actually puts out what it states.

[robertcottiers]

Re: 4x100W Amp Build

Hi Ron: How long did it take to get the PS from china?....

Regards
Bob

[tc]

Re: 4x100W Amp Build

Does that amp run off of straight DC power or is it +/-28Vdc?

That is a slick PSU! Are those 317/337 regulators?

[[email protected]]

Re: 4x100W Amp Build

cool
Ron. What will you do with it?

[Ron_E]

Re: 4x100W Amp Build

Does that amp run off of straight DC power or is it +/-28Vdc?

That is a slick PSU! Are those 317/337 regulators?

From the link in the OP:

Input: 110VAC
output: 28V DC (+-10%)
Dimensions: 100x100x36mm

The connexelectronic smps is newest generation smps and benefits from a small form factor, low weight and a high efficiency (up to 93%).
It can output 300W continous and 400W peak power, and can be adjusted +- 10% from its stock voltage. It also features a auxiliary power output which outputs around 10.5-13V, (proportional to main output voltage, 2/5 for 28V version (28V/5*2=11.2V) and 2/7 for 38V version(38/7*2=10.9) . The max. continuous current for the aux output should not exceed 500ma, and the total capacitance of the circuits connected to the aux output should not exceed 2200uF (otherwise the fuses might blow).

These are the semiconductors.



Ron

[Ron_E]

Re: 4x100W Amp Build

cool
Ron. What will you do with it?

Drive the mids and tweeters in the Cherry Pi's.

Ron

[[email protected]]

Re: 4x100W Amp Build

Drive the mids and tweeters in the Cherry Pi's.

Ron

I should have guessed that. Would love to hear them again. Your house?

[Ron_E]

Re: 4x100W Amp Build

I should have guessed that. Would love to hear them again. Your house?

I'm retired now so just PM me anytime you'd like to arrange a listen.

Ron

[Ron_E]

Re: 4x100W Amp Build

Hi Ron: How long did it take to get the PS from china?....

Regards
Bob

It was ordered March 21st so less than 2 weeks. The first tracking report I saw on the USPS site was it's arrival in Kentucky on the 30th.

Ron

[Ron_E]

Re: 4x100W Amp Build

I just ordered a case from Italy. http://www.modu.it/galaxyeng.html 330mm x 170mm x 80mm with the 10mm black anodized face option. $103 US delivered in 4 to 5 days.



Ron

[datranz]

Re: 4x100W Amp Build

Sub, thanks for sharing, I will be following closely.

[Ron_E]

Re: 4x100W Amp Build

I got out some clip leads and fired up the amp with the PS. I wanted to make sure the amp worked and all four channels are good. No thumps at start up and shut down and the fan is pretty quiet. Running stereo with a Sansa MP3 player and some little Radio Shack Optimus speakers everything is cool to the touch.

Ron

[Ron_E]

Re: 4x100W Amp Build

The case just got here from Italy and it looks good. The optional 10mm front panel is very beefy.



I have the rest of the hardware on order from ApexJr.



Ron

[Ron_E]

Re: 4x100W Amp Build

Case assembly went quickly. Everything fits together nicely. I'm going to have to find a way to de-rattle the tops and bottoms. They're only fastened on the short ends and the centers are free to buzz. It's going to look good I think.



Ron