Member's recommendations for tube amplification

I failed to mention that output transformerless amps should also be under consideration,  Atmasphere did not mention this type of amp because he makes them and is careful not to plug his own products.   
OTLs are very dynamic and lively sounding.  The Atmasphere amps also fit the OP's "not looking for overly warm, romantic or lush" criteria.  His 30 watt and 60 watt amps seem like a good candidates.

In you price range check out the 10 and 40 watt Linear Tube Audio amps (both David Berning designs?).

DeKay

+1 @noromance

I picked up a pair of the Coincident Frank mkII monoblocks last month, and these have become game-changing amps for me, after owning a multitude of other amps. Perhaps the end of the line, so to speak, for me.

I am using them with my Omega Super Alnico HO speakers (97db). They are NOT the stereotypical warm, euphonic 300b type of amp, but they are rather a dynamic, fast, open amp, that sounds a lot more powerful than the 8wpc rating. I highly recommend them for efficient speakers.

The thing about the Coincident amps is that they just don't make enough power. The speaker has an efficiency (we hope; if its a 4 ohm load the situation gets worse) of 94 db. 7-10 watts is simply not enough power, especially if you consider that with an SET, the ideal speaker for a given amp will be so efficient that there is never a demand for more than about 20% of full power.

If you break this rule, the SET will sound a lot more 'dynamic' than it has any business being, due to distortion generated that the ear uses as loudness cues. The thing is, once you know that is the case, its hard to listen to a setup like that and not be aware of the distortion. So reading this may have wrecked it for you.

In short, while the *idea* is attractive, in practice an SET won't work very well with this speaker although it may sound fine at low volumes.

David_Ten, if an OTL may be of interest I’d suggest that you check out the following listing here for a pair of Atma-Sphere M-60s:

https://www.audiogon.com/listings/tube-mk-3-3-2017-09-01-amplifiers

The seller is Duke of Audiokinesis, and based on the many outstanding posts he’s made here over the years I’d have total confidence both in him and in any advice he may have to offer as to their suitability for use with your Tekton Double Impacts. I presume, btw, that your DI, and the DIse you have recently ordered, are in the 4 ohm configuration that is usually chosen. If so, it may be best to use an OTL in conjunction with a pair of Zero autoformers, to boost the impedance seen by the amp.

You may also want to consider a used (and no longer manufactured) VAC Renaissance 30/30 or 70/70. The 30/30 utilizes a push-pull pair of 300B output tubes per channel and is rated at about 30 watts per channel. The 70/70 utilizes two pairs per channel in a push-pull parallel configuration, and is rated at about 70 watts per channel. Both should be findable in your price range, although the 70/70 would probably be close to the upper end of that range. I use the 70/70 in my system, with 6 ohm Daedalus Ulysses speakers that like the 4 ohm DI have a very flat impedance curve, and roughly comparable efficiency. I chose that amp because I wanted one that would provide a taste of the 300B magic but without the usual power limitations, given that I listen to a lot of classical symphonic recordings that have very wide dynamic range.

Both of the VAC Renaissance amps provide three output taps, btw, including taps that are designated as being suitable for use with 2 ohm speakers!

Finally, a minor point re Larryi’s post: Larry, I think your mention of "Brooks" should have said "Brook." Brooks was a relatively minor manufacturer of FM tuners which existed in the same ca. 1950s time frame as Lincoln Walsh’s Brook Electronics Company, to which I’m sure you were referring, and which as you know manufactured very highly regarded 2A3 and 300B-based amplifiers. Although I suspect that any Brook power amps which may be findable today would go for vastly more $ than the OP’s stated price range.

David, best of luck in your search.

-- Al