It's a 45/2A3. Search completed auctions and it will come up. What speakers are you driving with your 45 PSE?

I had a Jeff Korneff 45 amp years ago. A good 45 amp is magical.

I bought a triode Inspire and LP27a preamp from Dennis 5 years ago. Next was a used PSE. The 45 is a tube I really like and it may end up driving Lii or another full ranger.

Congratulations, neighbor. I was eyeing that amp as well. I almost pulled the trigger. Enjoy it in good health.

have a Firebottle purchased in December 2018 and a 3.1 that I picked up in July 2019. I run a pair of Spendor LS3/5A’s with superb results. I roll tubes from time to time, but I seem to have settled on the KT-150’s.

Ed

I placed a order for the Inspire Universal SET cant wait for my new toy from the toy factory!
rmlowz

Pulled it up. Nice!

I'm using it with a pair of Altec M14's. I've also used it with Tannoy Devons, but the Altec combo really works. Incredible bass authority in such a low wattage amp.

I'm having larger cabs made for the Tannoy drivers to take "full" advantage of them. That is something I'm looking forward to hearing.

I like hearing this. LS3/5As are quite inefficient, most measure at around 83dB, but have a smooth, easy impedance curve. Many Brits powered them for years with 15-20W tube amps. Many people are under the assumption that one cannot use a low efficiency speaker with a lower watt tube amp. But in the right room, and if a listener isn't driving them to concert-level volume, it can be a pleasant combination.

I have a pair of 87db Focals which I sometimes use with my Inspire KT88 and find the combination quite satisfying.

I know of people using Harbeth P3ESR speakers with 10wpc tube amps. Those also measure at 83db. You're not going to be able to play classical music at loud levels with this combo, but it can meet the needs of some.

Could you describe the changes to the front end of your IIPS? I have one built in 2016.

24” with the height of center at 31” both of which are to my low end detriment. My architects eye may not allow for much wider in my living space but I am interested to hear about what you have found.

Bombadil, in the small space where I have this setup, the LS3/5A’s sound great playing Jazz, Blues and other acoustic music. Classical guitar, vocals sound really natural. The 3.1 and the Firebottle mate very well with these 11 ohm Spendors.

You are right about the impedance curve is an important, often overlooked variable. While I would not necessarily recommend the combination for everyone, for my musical tastes and the small room this system is superb.

I found a thread about these drivers on Audio Haven. The baffles should be wider. You can do this by adding 8-10 inch wings hinged 'wings' to the sides. This will increase the effective width of the baffle. More later.