tube amp for Apogee Tweeter mid-range

Ouch... I really like the sound of my (Nelson Pass designed) Threshold poweramp with my Apogees (Centaur Major). I'd suggest you take another approach and change the preamp for a tube amp. To my ears, Naim gear always sounds a tad bright.

Then again, it's all a matter of taste. For two K there are many poweramps available, especially secondhand. You can also 'tune' them a little bit by changing the tubes. Only problem of the Stages is the lowish impedance - not as bad as the Scintilla's, but 3 Ohm and a low sensitivity means a new poweramp has to be able to deliver some power. Make sure you test your new amp at home before buying.

I use all tubes with my Apogees....Amps, preamp, and DAC. I have Duetta Signatures, and MiniGrands...and I switch between them every few months.

I had been using Solid State (Krell) for a number of years, but switched to Rogue Audio tube mono's around three years ago...and I would never go back, unless I was forced to.

Biamping the Stage, Duetta Signatures, or any other two-way Apogee speaker is a waste of time and money, in my past experience....YMMV of course.

Around 100-200 good tube watts are all you need (my amps are 120 watt monos, and real toe tappers!). These amps drive both pair of Apogees as loud, and with enough control, to fill all my needs.

If you listen at above 90db very often (I don't)....150/200 watts may be in order for you.

Tube amps come in all flavor of coloration...or very little at all? In my search....I wanted Krell like bass, a better midrange (tube coloration?)....and very articulate highs....I chose the Rogue amps (Kt-88 tubes), and have been very happy.

My DAC is Monarchy M-24....NOS Amperex
My preamp is Audioprism Mantissa...NOS Amperex

Good luck in the hunt!

Dave

Hi Scott

How much breakin time is on the new caps that were installed? Is the crossover passive or electonic? Passive crossover caps and resistors can take up to 300hrs to burn in and open up. Your description of sound is what you can expect for the first 25 to 50 hours. After that things begin to mellow out and expand at the same time. What brand caps did you use?

Ed

Thank you for your responses,

You are probably right about the burn in time for the capacitors. I'm using Clarity Caps SA, and I remember when I built some speakers last year and had a similar problem. It took a good three months for the higher frequencies to settle down. Once they burned in, the sound was beautiful. After that time period I may try a Rogue amplifier since my local dealer carries Rogue.

Dave, When you said Biamping the Apogees is a waste of time, what effect did biamping have on the sound from your Apogees? When I first tried biamping with my Pass Labs x150 and Sim Audio W3, it really opened up the sound and allowed me to match the strength of each amplifier with either the bass panel or tweeter midrange ribbon. I have never tired using tube monoblocks to power the stages, only an Audio Research Vs110 amp. I though the sound frp, the Audio Research was a little to "soft and mellow" for my taste. Maybe I should try a few more tube amps.

Scott