Which class D amp sounds closest to a SET amp while driving full rangers? - diyAudio
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Old 8th October 2011, 04:03 PM   #1
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Default Which class D amp sounds closest to a SET amp while driving full rangers?

Hi,

I just started getting interested in high efficiency full range speakers. I have a few tripath amps. After testing out with my valve amp, I think I still like my valve amp more. The tripath amps that I find closest sounding to my valve amp is based on same chipset as original sonic impact. I have tried the virtue one, but I find the voice too thin. I reckon it has to do with damping factor more than anything else. So I am wondering if anybody out there has gone through a whole bunch of amps compared against a good SET on a pair of lowthers or the like and see which one sounds the most similar...

Thanking all in advance...
Oon
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Old 8th October 2011, 06:20 PM   #2
Trebla is offline Trebla  United Kingdom
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You could kick off a whole thread discussing what constitutes "a good SET".

The TA2024 and TA2020 sound similar to my EL84 PP amp. But also different.
Not sure either would compare to my previous SET, or any SET for that matter.
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Old 8th October 2011, 08:24 PM   #3
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You can always plug in a 0.5 - 1 ohm power resistor on the speaker outputs so the Tripath amps have very low dampening factor (and your speaker gets it's Qtc boosted) just like on your SET.
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Old 8th October 2011, 08:41 PM   #4
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Yeah, but that will not make it sound like a 300B SET amp...

I have owned one - it didnt sound like anything else, and not at all like class D.
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Old 9th October 2011, 10:43 AM   #5
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I have 2 tripath in my arsenal. I have to agree on your choice of chips. The 2024 sounds more valve like than the 2050. Wonder how it might sound with an additional 1 ohm resistor.

Oon
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Old 11th October 2011, 04:50 PM   #6
julcat is offline julcat  Mexico
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Hello, could you please explain how to connect the resistor and what are the specs of the resistor????
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Old 11th October 2011, 05:02 PM   #7
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Quote:
Originally Posted by julcat View Post
Hello, could you please explain how to connect the resistor and what are the specs of the resistor????
You just series connect it on the plus or minus terminal somewhere between the amp and the speaker. Only important spec is the power handling capacity of the resistor which should be:

Rp = P * (R / Z)

Where

Rp is power handling specification of the series resistor in watts
P is the Wrms output of the amp
R is resistance value
Z is nominal impedance of the speaker.
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Old 11th October 2011, 05:09 PM   #8
albin is offline albin  United Kingdom
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Default oon

I've not compared them,but the fact that the low power tripaths switch at 900khz affects my perception.
Regards Max

Last edited by albin; 11th October 2011 at 05:13 PM.
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Old 11th October 2011, 05:21 PM   #9
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Originally Posted by albin View Post
I've not compared them,but the fact that the low power tripaths switch at 900khz affects my perception.
Regards Max
Whatever makes you think that? The specification sheet states it's a wide band spread spectrum typically between 100kHz and 1MHz.

Last edited by Saturnus; 11th October 2011 at 05:24 PM.
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Old 11th October 2011, 05:30 PM   #10
albin is offline albin  United Kingdom
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Default 900Khz

Saturnus,
ripple on an oscope.
regards Max

Last edited by albin; 11th October 2011 at 05:35 PM. Reason: I might be wrong,but I didn't notice spread spectrum
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