Tube pre-amp + Class-D amp. any experience?

rvrazvan · 22nd March 2011, 06:40 PM

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?

Miniwatt · 22nd March 2011, 06:48 PM

I've heard very good things about it.

rvrazvan · 23rd March 2011, 12:14 PM

up

Magz · 24th March 2011, 01:44 PM

I run a modified Supratek Chenin tube pre with Gilmore Raptor Class D monoblocks and they sound excellent with my Infinity RSIIb speakers.

rvrazvan · 24th March 2011, 03:21 PM

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?

Helmuth · 24th March 2011, 03:48 PM

pmillett · 24th March 2011, 07:15 PM

You might want to look at Ohashi-san's class-D hybrid:

Class-D Description

Pete

revintage · 24th March 2011, 07:40 PM

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.

Wavebourn · 24th March 2011, 08:29 PM

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.

rvrazvan · 24th March 2011, 08:55 PM

I'm gonna give it a try i think. Hope i can find the tripath chips here

22nd March 2011, 06:40 PM	#1
rvrazvan diyAudio Member Join Date: Jul 2010	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?

24th March 2011, 03:48 PM	#6
Helmuth diyAudio Member Join Date: Oct 2008 Location: Winterswijk	__________________ ( (( KUGELWELLE )) ) recent projects :OB-mk1 /fatboy / monitor-xl / Horn-AM / dappolito / td124-mk1-rb301 / Hybrid-pse / Vfet

24th March 2011, 07:15 PM	#7
pmillett diyAudio Member Join Date: May 2005 Location: Dallas (but I am not a Texan!)	You might want to look at Ohashi-san's class-D hybrid: Class-D Description Pete __________________ When life hands you a jeffery, stroke the furry wall.

24th March 2011, 07:40 PM	#8
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	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. __________________ Brgds Lars

24th March 2011, 08:29 PM	#9
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	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. __________________ The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity!

22nd March 2011, 06:48 PM	#2
Miniwatt diyAudio Member Join Date: Nov 2004 Location: Den Haag	I've heard very good things about it.

23rd March 2011, 12:14 PM	#3
rvrazvan diyAudio Member Join Date: Jul 2010	up

24th March 2011, 01:44 PM	#4
Magz diyAudio Member Join Date: Oct 2009 Location: New Jersey, USA	I run a modified Supratek Chenin tube pre with Gilmore Raptor Class D monoblocks and they sound excellent with my Infinity RSIIb speakers.

24th March 2011, 03:21 PM	#5
rvrazvan diyAudio Member Join Date: Jul 2010	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?

24th March 2011, 08:55 PM	#10
rvrazvan diyAudio Member Join Date: Jul 2010	I'm gonna give it a try i think. Hope i can find the tripath chips here

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Raphaelite Audio Transformers & Sino Tube Amplifier Kits - What's your experience ?	kimbal	Tubes / Valves	7	14th September 2010 08:50 PM
FS: Audio Experience Symphonies Tube Pre-Amp w/ Auricaps	mrdon	Swap Meet	6	26th November 2008 01:51 AM
Help designing Class-A, tube, transformer coupled, studio grade pre-amp	gibsonripper	Tubes / Valves	8	14th December 2007 09:02 PM
Valve Pre Amp & Class D Power Amp	Puffin	Tubes / Valves	7	16th June 2006 04:41 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read