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Old 29th April 2009, 03:03 PM   #21
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Thanks Arjen, that's nice and clear.

Stupid Question Alert: Would I be able to run my Rotel 931 MKII Amp into your "25Watt TA2020 PCB new version fully finished and tested" amp; as people are raving about the sound quality of the Tripath TA2020? Or could I use the TA2020 as a preamp instead?
Thanks again, Tony Swaine
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Old 29th April 2009, 07:02 PM   #22
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...I've been thinking... that if I ran the TA2020 as a preamp, into the Rotel amp, I would lose any 'quality sound improvement' benefit, though, wouldn't I?
Tony
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Old 29th April 2009, 09:25 PM   #23
morglo is offline morglo  Sweden
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A pre-amp is basically a control unit that regulates the volume and allowes you to switch between input sources. An integrated amplifier consists of a built i pre amp and a power amplifier.

You could use the Rotel as a pre-amp if it has pre out exits. The TA 2020 which is a power amplifier should definitively not be used as a pre-amp.
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Old 30th April 2009, 12:30 AM   #24
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Thanks, that's sorted that one out - I should forget the Rotel, and just run the source (CD) straight into the TA2020 and onto the speakers!
Thanks everyone for helping.
Tony
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Old 9th May 2009, 02:18 PM   #25
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Hi! In reply to Arjen and Morglo (posts #20 & #23): Arjen I am stunned and amazed at the power and quality of this tiny amp - the size of a fag packet!
I am running the amp (12V 2A DC supply) into 2x physically large 8 Ohm speakers, but without the pot, the volume was too high for comfort; but now it's exquisite!

I have setup the "TA2020 PCB new version fully finished and tested" amp with a 100K volume pot and a 22k resistor on the output/GND (middle/2nd)/ (right/3rd) pins, as suggested here:http://sound.westhost.com/project01.htm

This was to inprove the characteristics of the pot to enable a more Log Pot S curve response/sound.

I have noticed a slight thump through the speakers, when I switch on the amp, but I am not at all concerned by this, as I have had this on a NAD 3020, and my current Rotel 931 mkII does the same thing.
Is this a 'power surge'?
I saw somewhere, of a configuration where someone had a resistor and a capacitor connected in-line just after the power in. What might that have been for?

I cannot wait for the valve preamp TA 2020!
Many thanks, Tony Swaine
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Old 12th May 2009, 03:42 PM   #26
adn6244 is offline adn6244  Singapore
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Default ta2020

Hi Arjen,
i'm the same guy who message u thru ebay.

question, can i use one pcb for one speaker and ttherefore each one output 25w?
is the new ta2020 model that u are launching soon, sonically better than the existing one?

i am referring to the model that output 25w with 2 orange or res caps by the side.

cheers....
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Old 14th May 2009, 07:40 AM   #27
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I'd also like to know the answer to adn6244's question.

As well as: If we have a pre-amp and want to bypass the pot on this board how do we do that?

Just jumper the holes?

Thanks,
Matt.

(kingmattman on ebay)
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Old 3rd June 2009, 10:44 PM   #28
gychang is offline gychang  United States
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Location: Davis, California
Quote:
Originally posted by twinney12


I have setup the "TA2020 PCB new version fully finished and tested" amp with a 100K volume pot and a 22k resistor on the output/GND (middle/2nd)/ (right/3rd) pins, as suggested here:http://sound.westhost.com/project01.htm

Tony Swaine

Tony, I will be getting the same MKII Version of TA2020 and will be adding the volume pot.

Any recommendation on how to do it on this board?

gychang
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Old 4th June 2009, 09:20 AM   #29
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Hi! This was sent me by Arjen:"To connect a volume potmeter you have to do the following:

- every stereo potmeter has 6 pins, in 2 rows of 3. every row of 3 is one channel, so one for left and one for right.

the 2 last pins in each row can be connected to the ground wire from the PCB and from the source

the middle pins can be connected to the TA2020 PCB input

The 2 first pins can be connected to the source.

if you have connected it it looks like this:

[R-source][R-amp][GND]
[R-source][L-amp][GND]
then it should work!

all these connectors should have there function written next to it
"
See the picture I've included, and orientate your pot in same way - ie turn it upside down with the pins sticking up, and the knurled knob facing you.

(From my post to Arhen: I am running the amp (12V 2A DC supply) into 2x physically large 8 Ohm speakers, but without the pot, the volume was too high for comfort; but now it's exquisite!

I have setup the "TA2020 PCB new version fully finished and tested" amp with a 100K volume pot and a 22k resistor on the output/GND (middle/2nd)/ (right/3rd) pins, as suggested here:http://sound.westhost.com/project01.htm

This was to improve the characteristics of the pot to enable a more Log Pot S curve response/sound.")

That is:
1. connect top left pin to right channel from cd output (or whatever source).
2. connect top middle pin to right channel connector R input on pcb board (or whatever source).
3. Top R pin on pot to ground (or earth) on the board.
4. Connect 22k resistor BETWEEN top middle and top R pins on pot.

You place the pot between the output of your source (CD?) and the Input of the Tripath board.
Attached Images
File Type: jpg vol pot.jpg (19.1 KB, 1236 views)
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Old 4th June 2009, 09:36 AM   #30
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Thanks for posting that, might end up doing it on my board.
Not sure coz I'm going to build a preamp though.
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