Sonic Impact 5066 Parts List & Modifications

[soundphreak]

You have a 3 position switch. Probably a SPDT (single pole double throw) This page describes several different types of switches and briefly how they work. My amp actually has one of these because I had it in on hand. Just use the center pole for gnd and one of the sides for + or you could connect + to both outside poles so it would come on no matter which way you switch it.

This is another page showing how switches work.

[samvel65]

Thanks, soundphreak!
It all makes sense now.

Now, thanks to all of you guys. You inspire me and make me want to learn and create. Thanks! Before I ask away, a little about my technical background. I have none! I've never soldered anything in my life or know how to work a multimeter. However, I'm diving into this thing and learning fast. I own tube and solid state equipment, some mass-market stuff, and Mirage speakers. I've owned Klipsches and Magneplanar MMG's before and going back to Maggies soon. I just got my first T-amp and I am thrilled! I have a D-class 5.1 channel TEAC, as well as Motorola DCP501 on the way.

My SI T-amp board is one of the later ones, so I'm attempting Michael Mardis' "Caps Only" mod for now, until there's more info about that board. The chip is TA2024B, by the way. Now to the questions:

1. Wiring: I've seen that many of you use twisted wires for your PCB wiring. Is there a specific wire I must use? I was thinking about stripping the CAT5 wire and use the 24 gauge wires inside to twist mine. Will that work?

2. I read that TA2024B CAN be bridged, but you would have to run 2ohm speakers to see the benefits. Did I understand that correctly? And if so, are there really any practical applications for that (i.e. are there any 2 ohm speakers).

I'm sorry if I sound confusing, but you guys will set me straight, I hope
Thanks!

[pekar]

I've been using my Sonic Impact in a solar boombox.
I've posted basic instructions here-
http://www.instructables.com/id/EYASGDSF0FI3ADK/

[Sbailey294]

Wow..cool project with the solar boom box. That was going to be project #2 for me.

I'm a total nOOb at DIY so I find myself at a hold with modifying my SI T-amp.

Any one have updated pictures for moding a rev. D of the SI board? I am having problems locating some of the little caps I am supposed to bridge and or remove. It's kind of good my Mardis edition Trend isn't here yet...that would give me a good excuse to give up ...but no I'm pressing on.

[soundphreak]

Start reading this thread at about post 87 for info on the new board revisions. I have one of them also and just decided to upgrade the power circuit and re-box before this info was available. I have since built an AMP6 and am in the finishing stages of it, so I think I'll leave my SI t-amp the way it is and use my Auricaps on the amp 6.

Hope this helps

[Pano]

Here are some updates on the new Sonic board.
It seems to be easier to modify than the old board. There have been some nice improvements.

Images and diagrams in the next few posts.

[Pano]

Here is the mod layout. Using a Panasonic EVJ pot for volume, but you may be usiing something else.

[Pano]

Here is a detail of where you will do the hard work.

[Pano]

After surgery. Small delicate work.

To bridge the removed caps, use a tiny bit of L shaped wire. You hold onto one leg of the "L" with pliers or tweezers, cut off the extra after soldering.

EDIT: No need to remove the plug socket. It was done here just for illustration.

[Pano]

This is the new plug that connects the board to the volume pot and switch. Nice to have a plug!

Don't reverse the cable, the wires are in opposite order on each end. You will not need the last 2 wires on the right, as they come from the mini-plug and go to the pot. You will be bypassing all that, right?

You can use the red switch wires for your own switch, or just connect them together if the switch is elsewhere.