Hi All,

I am not a typical valve and vinyl guy... I have never bought or built any valve amps but I have loved the sound of all the valve amps I have heard in my system over the last 20 years. I have built dozens of loudspeakers for my own use and built over 50 pairs on a commercial basis for studio and private use... http://custominstallaudio.com/commercial-audio/

Now I am retired and building my end game audio project... First the source...

A 48 volt / 100 Amp / hour (38 Kg!) LiFePo4 battery powering a custom built motherboard with Auro 3D https://www.auro-3d.com/creative/ source/DSP/crossover/Eq mastering/processing software and 20 (upgradable to max of 50) Sd cards (500 Gb each) to store all my music (uncompressed WAV files only) and movies. It has massive processing power and can run all crossover/Eq/room measurement and correction functions for up to 32 loudspeakers where each loudspeaker is a three way active design... I am currently 10 loudspeakers plus four subwoofers. My current loudspeakers use Pro 15 inch bass and bass mid drivers with my own Rapid Energy Decay (RED) drivers for mid and high frequencies.

My new loudspeaker cabinets use stranded bamboo in a laminated front to back layer construction and all boxes sealed... No ports or TL/passive radiators etc! Bass cabinet is 160 litres with two seperate chambers for 15 inch Pro drivers with 4 inch voice coils, low Mms and high Bl. Low bass in 110 litres and midbass in 50 litres, with a combined sensitivity of 97 dB / 1 watt and 4 Ohm impedance they can handle up to 700 watts AES continuous power so should last forever with 100 to 200 watts of big valve power.

Midrange cabinet houses 6 seperate Pro midrange drivers and a Beyma TPL 200 AMT driver which is mounted in the centre of six midrange drivers arranged in a unique pattern. Each midrange driver is a 6.5 inch paper cone 94dB/1 watt 16 Ohm model. The end result is a giant "coaxial " driver with the Sd of a 15 inch driver but the Mms to Bl ratio of a 6.5 inch Pro midrange... 101 dB/1 watt at 1 meter with 10 Ohms impedance. This matches beautifully with the 100 dB/ 1 watt at 1 meter and 8 Ohm impedance of the Beyma TPL 200, the midrange drivers are rated at 120 watts AES per single driver and the Beyma TPL also handles 120 watts AES, so again should sing beautifully with 5 to 50 watts of tube amp... Big KT 120 monoblocks on bass, 845 mono block mids and something 300 B based for the treble...????

Thanks in advance for the next year or two advice as it will be a slow development process but OMG once this little lot is up and running!!!