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Old 22nd March 2011, 06:40 PM   #1
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Default Tube pre-amp + Class-D amp. any experience?

I won't let go of tube amps but in i might build a Class-d amp with a tube preamp for a friend. I'm also considering to build an 3 or four way Ob sometime in the future with tube preamps.
Any experience with this?
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Old 22nd March 2011, 06:48 PM   #2
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I've heard very good things about it.
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Old 23rd March 2011, 12:14 PM   #3
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Old 24th March 2011, 01:44 PM   #4
Magz is offline Magz  United States
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I run a modified Supratek Chenin tube pre with Gilmore Raptor Class D monoblocks and they sound excellent with my Infinity RSIIb speakers.
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Old 24th March 2011, 03:21 PM   #5
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Usually people complain about the lack of "life" in class d amps. they have great clarity great dynamics but the sound is not touching. Does the pre-amp heal this?
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Old 24th March 2011, 03:48 PM   #6
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Old 24th March 2011, 07:15 PM   #7
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You might want to look at Ohashi-san's class-D hybrid:

Class-D Description

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Old 24th March 2011, 07:40 PM   #8
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If one have an UCD, the above circuit will not be of any use as the amp already have enough gain. Can only get worse with another stage whether tube or sand.

If you insted remove the OP-amp built in the UCD and instead use an unbalanced to balanced tubestage, a mod will be understandable. Talked to the UCD-people a whike ago and we agreed this could be the solution for those wanting to make a hybrid.

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Old 24th March 2011, 08:29 PM   #9
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Last year I started developing such an amp, but gave up temporarily... It has tubes, video current comparator ICs, and MOSFETs. Should sound really nice, theoretically.
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Old 24th March 2011, 08:55 PM   #10
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I'm gonna give it a try i think. Hope i can find the tripath chips here
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