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-   -   Adding a Tube Pre-Amp Stage to T-Amp (http://www.diyaudio.com/forums/class-d/114559-adding-tube-pre-amp-stage-t-amp.html)

amsci99 31st December 2007 02:50 PM

Adding a Tube Pre-Amp Stage to T-Amp
 
Was just wondering if the marriage of a tube pre-amp stage and the pure power and efficiency of a Class D power stage could make a sonically pleasing yet compact integrated amp. Much as I like to experiment on this, have no idea how this could be accomplished and wonder if any T-Amp modders out there have tried this.

buddah2xa 31st December 2007 06:11 PM

http://www.autocostruire.com/catalog...1c5e8084097ff6
http://www.autocostruire.com/catalog...1c5e8084097ff6
http://www.autocostruire.com/catalog...1c5e8084097ff6


;) ;) ;)

zacster 1st January 2008 07:06 PM

I used my Foreplay II tube preamp with my Charlize amp for a short while and it was much better than just the charlize with a volume pot. Since the amp was for my kids, and the FP has high voltages running through a not very well sealed box, they use it with just the pot.

If you have a tube pre, or can borrow one, just try it and see if you like it. You could then build it into a single chassis.

yamaha 3rd January 2008 04:11 PM

I got this from ebay, sounds nice with a modded audiodigit Class T100 HCL-m. Its currentley my main set-up

http://cgi.ebay.co.uk/Tube-buffer-am...QQcmdZViewItem

amsci99 4th January 2008 03:25 PM

The following looks like it could preform as a pre-amp with the right modifications notwithstanding that it is small.

http://www.roehrentechnik.de/html/kolibri.html

Actually my intention was to integrate a tube-pre with the T-amp functioning as a power amp in a new enclosure as a hybrid amp driving JVC wooden cone speakers which are now available in kit form. Placed in the office, would not take up too much space and would sure make the overtime hours more pleasant.

OzMikeH 5th January 2008 12:21 AM

Be wary of the ebay one.
Tubes simply do not work properly at 12V.

planet10 5th January 2008 03:52 AM

Quote:

Originally posted by amsci99
JVC wooden cone speakers which are now available in kit form
Tell us more.

dave

doorman 5th January 2008 04:13 AM

I've got a Trends TA10.1 which I use occasionally. The addition of a tubed Pre in front makes it into a very enjoyable combination. Without it, it lacks a lot of that "something" that I look for!
Don

planet10 5th January 2008 04:35 AM

Quote:

Originally posted by OzMikeH
Be wary of the ebay one.
Tubes simply do not work properly at 12V.

Unless you use tubes designed to run that low. 6DJ8 isn't one of them (they usually start with 1)

dave

planet10 5th January 2008 04:37 AM

Quote:

Originally posted by doorman
I've got a Trends TA10.1 which I use occasionally. The addition of a tubed Pre in front makes it into a very enjoyable combination. Without it, it lacks a lot of that "something" that I look for!
Don


Just got our Trends back from Chris (had to give him the KingRex). Guess i should hook up my Gregg the Geek line stage up with the USB DAC and the Trends and have a listen.

dave


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