Pairing Bryston 28b3 with tubes

Hello all

I have a pair of Bryston 28b3 monoblock which I want to pair up with a tube pre-amplifier.

I want to add that "tubemagic" to make the music come alive and I´m interested in hearing from
you guys what you recommend. What could be a great match with the monoblocs from Bryston. 

These are some of the pre-amps I´ve been reading up on.

- Cortese from
- Microzotle from LTA

The speakers I will have is custommade with these specs

Drivers: 4 x 17,4cm
Treble: 1 x 2,8cm
Impedance: 7 ohm
Effect: 800W
Maximum effect: >20 kW (> 400 hz)
Sensitivity: 92dB-2.83 V
Power handling: 5w (min) to 2000 W (max)
Soundpressure: >130 dB/pair, 100 Hz (1,4 kW)



I have a much smaller Bryston Amp the 3B Cube and I have it hooked up to a Luxman CL38U se all tube preamp. For me an excellent combo. 

Backert Labs.,     Zesto Leto Ultra 

I had the original Zesto Leto and it was the best sounding preamp I have owned or had firsthand use with.   It commits zero sins and sounds incredible 

As you make a list of pres to research, be aware of the input impedance of your amps.It needs to be at the very least 10 times higher than the output impedance of the pre.Pres with highish gain can be an issue also. A gain of 10db is good,but higher gain that reaches close to 20 and above means barely turning the volume control or it will be quickly too loud.Then you'd miss out on all of that tube goodness:-)I have no experience with Bryston so no recommendations.