New TK2050 board

[TheDealer]

Originally Posted by hifimediy

Hi, I don't quite understand why it's fail when installed into the chassis. But I'm thinking about some possible reason. The first is that the input cable is not good connection, and then pls check the output cable(from amp to connectors), to see if any output terminal is Grounded. I suggest use a multimeter to check these upon carefully before power on, any mistake may kill the amplifier. There is also another possibility, the bottom of board touched the chassis (metal). And I also need a photo to check more if you can give

Originally Posted by DarpMalone

Hi Dealer... Have you checked for continuity between the binding posts and the enclosure? Are you sure you they're not shorted?

Indeed you both seem to be right. This time I tried the new binding posts and probably the metal touches metal and this leads to a short-circuit. Good that there is a working speaker protection relay I will check them out. Thanks ...

[mfaughn]

I searched this thread but can't find any head-to-head comparison in sound between the T2 SE and T3S. I've been planning to get a HiFimeDIY amp since this thread was less than a tenth as long and I'm finally gearing up to pull the trigger. Just don't know which one. If SQ is close I'd go for the power but if the T2 SE were significantly better sounding It'll be that one.

[hifimediy]

Originally Posted by mfaughn

I searched this thread but can't find any head-to-head comparison in sound between the T2 SE and T3S. I've been planning to get a HiFimeDIY amp since this thread was less than a tenth as long and I'm finally gearing up to pull the trigger. Just don't know which one. If SQ is close I'd go for the power but if the T2 SE were significantly better sounding It'll be that one.

Hi, I suggest choose the amp according to your need, like how many watts you need and what voltage supply you want to use.
T3S will output more power than T2 SE because it can be supplied with higher voltage. They are almost same when you use same voltage to same speaker.

[mfaughn]

Originally Posted by hifimediy

Hi, I suggest choose the amp according to your need, like how many watts you need and what voltage supply you want to use.
T3S will output more power than T2 SE because it can be supplied with higher voltage. They are almost same when you use same voltage to same speaker.

Thanks for the help there. I think it makes more sense then to go with the T3S because you never know what I might hook it up to in the future.

[zanlation]

I finally got around to putting my 3 channel amplifier together using two T4s and a SMPS800RE. The remote control switch is working really well and everything powers up nicely. BUT when everything powers up I get high pitched noise coming out the speakers. I double checked all my grounding, especially the RCA inputs and to my eyes all looks ok. I have another 2ch T4 amp with SMPS500R that works beautifully. I checked the differences between the two amps and these are:

1. I use a wooden enclosure for 2ch and metal for 3ch
2. I am using 1 SMPS to power 2 T4s in the 3ch
3. The RCA connections internally are grounded using two separate black wires that come from the potentiometer in the 2ch and in the 3ch I am using the single black to one of the RCA ground washers for front, the second T4 has red into RCA and the other white and black wire is grounded to red RCA plug.

I have been testing only the LR fronts with some spare speakers.

What other issues could I be having with the amp?

[b4rr3l]

problem is definately in the rca stuff, you should only use the ground provided by the amplifier board, and it should connect to all of rca ground together, you can also connect the earth input to the chassis.

[zanlation]

Originally Posted by b4rr3l

problem is definately in the rca stuff, you should only use the ground provided by the amplifier board, and it should connect to all of rca ground together, you can also connect the earth input to the chassis.

Do you mean the black wires (surrounding wire) for both amps are connected together? The ground washers on the RCA plugs are not connected to the chassis, but separated by a plastic washer. The black wire should be grounded but not in contact with the chassis?

[zanlation]

Or I could connect the black input wires to the grounding star that the external power and SMPS are connected too.

[b4rr3l]

Originally Posted by zanlation

Do you mean the black wires (surrounding wire) for both amps are connected together? The ground washers on the RCA plugs are not connected to the chassis, but separated by a plastic washer. The black wire should be grounded but not in contact with the chassis?

Originally Posted by zanlation

Or I could connect the black input wires to the grounding star that the external power and SMPS are connected too.

We are talking about the input right? yes ground both input together L and R,

But each input only connected to it's following amplifier ground input. (L and R together)

Keep them insulated from the chassis.

[zanlation]

Can I just check the order of RCA parts. from external to internal - PLUG -> plastic washer -> chassis -> plastic plug -> ground washer/ring -> nut -> positive wire soldered to end.