Recommendations for 12ax7/5751 and 12au7

Tubes Asylum

Questions about tubes and gear that glows. FAQ

Hi fellow inmates,
I live in Australia, and a keen but new audiphile. I have a locally made valve power amp which uses a pair of 12ax7's and 12au7's for input (both electroharmonix), and output stage are 4 6550's, Sovtek.
I am not overly keen on the sound generated, as it lacks impact, imaging, smoothness and bass. I currently use a CEC transport and DAC direct to the power amp. I have also teh bryston 25P preamp, and bryston 14bsst poweer amp. My speakers are DaliMS5 euphonia's.
A few weeks ago, a friend who has the same bryston power amp, brought this amp with him. We hooked up and used one amp for the base, and teh other to the mid/treble posts of the Dali's. It improved sound immensely, more focused, detailed, imaged amd quieter.
Well, as I had the valve power amp sitting around, I did the unthinkable or perhaps not great idea\(or maybe some will be contrary)of running the bryston power amp to the bass/mid of the dali's, and the valve power amp to the treble. Each fed from the bryston pre-amp.
Now, sounded better than the bryston alone. The treble detail was much better, and slight imrovement in imaging. However, still somewhat harsh.
Now my question. Is it worthwhile to pursue modifications to the valve power amp to improve the treble, or am i wasting my time?
If it is worthwhile, valve recommendations?
I have read about the amperex bugles, and the sylvania triple black plated 5751. as for 12au7? Matched pairs?
For the 6550's ?recommendations.
I enjoy wide range of music; vocals, jazz, classical, orchestral, string quartets....
Thanx for your opinions. i look forward to your responses.

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable

Topic - Recommendations for 12ax7/5751 and 12au7 - gopies 04:23:56 11/19/05 (5)

Re: Recommendations for 12ax7/5751 and 12au7 - Eli Duttman 11:05:22 11/19/05 (0)

Re: Recommendations for 12ax7/5751 and 12au7 - Jimmy 06:00:06 11/19/05 (3)

Re: Recommendations for 12ax7/5751 and 12au7 - gopies 15:29:17 11/19/05 (2)

Re: Recommendations for 12ax7/5751 and 12au7 - Kamigo 23:10:11 11/19/05 (1)

Re: Recommendations for 12ax7/5751 and 12au7 - gopies 03:20:13 11/20/05 (0)

You can not post to an archived thread.