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Alex M's mostly DIY System
IP Address: Last Update: December 20, 2017 at 11:42:31
Amplifier: I bi-amp my speakers: DIY version of Kevin Kennedy's differential push-pull 6SL7/6SN7/300B monoblocks for mid/treble, and a pair of Hypex PSC2/400d modules for bass.
Preamplifier (or None if Integrated): Vacuum State RTP3 fully differential valve preamp (DIY). Twelve 6922 valves and a hybrid cascode phono input stage to increase gain and reduce noise.

Vacuum State SVP valve preamplifier with hybrid JFET/valve phono stage, also DIY.
Speakers: Troels Gravesen's SEAS 3-way Classics Mk 2

These replaced my own design of three-way floor-standers, with Scan-Speak tweeters and Audax HDA mid and bass. I spent much of 2012 converting these from semi-active to wholly passive and then tweaking the crossover: this resulted in a much more relaxing, natural and transparent sound. In the end, though I decided they were too big for the room.

I have also used, and enjoyed very much, ProAc Studio One Mk. 2 (on Target 17/2 stands)

I use Sennheiser HD595 headphones too (though these are usually either plugged into the Yamaha digital piano or used to listen to iTunes on my MacBook).
CD Player/DAC: Marantz CD6005
Turntable/Phono Stage: Turntable: Pink Triangle PT TOO, with full Funk Firm Vector upgrade

Arm: Funk Firm FX-R, recently replacing an SME Series IV

Cartridge: Lyra Delos
Other Source(s): Denon TU260 FM tuner
Other Accessories/Room/Misc.:
Speaker Cables/Interconnects: Maplin silver-plated stranded copper speaker cable

Twisted pair (Cat 5) DIY balanced interconnects, terminated with Neutrik XLRs

VdH D102 unbalanced interconnects for CD player and radio
Other (Power Conditioner, Racks etc.): DIY double-width six-shelf system rack.

Dedicated 30A mains spur, with separate wiring for power amps and for the line-level components.
Tweaks: ... as I said, mostly DIY to start with...
Room Size (LxWxH): 6 metres x 5 metres x 2.5 metres
Music Preferences and Comments:
Music Used (Genre/Selections): Classical; prog and heavy rock; folk; jazz; world music

BBC Radio 2 and 3
System Goals/Comments: Unfatiguing, dynamic sound with convincing presence, space and timbre.
System Strengths: With each change to the system (particularly the 300B amps!) the sound gets more listenable and colourful.

Adding the Hypex amps to drive the bass seriously improved the solidity and drive in the bass.
System Weaknesses: The room is an awkward L-shape, which restricts both speaker placement and the listening position. It is also too small to have either the speakers or the listening seat far enough from the wall, so the soundstage at the sofa isn't as expansive as I'd like.

The system is also missing some bass impact and definition, but that's probably mostly a room problem.
Video/HT System: None
URL Link: http://www.soton.ac.uk/~apm3/diyaudio
Other Interests/Hobbies/Occupation: Interests: music, aikido, science fiction, food.

Occupation: oceanographer/climate scientist.

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