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mjk's workshop system - test bench System
IP Address: 69.19.14.30 Last Update: June 15, 2008 at 12:14:30
Amplifier: Custom 300B PP Monoblocks, approx. 14WPC at 400V a-k/45mA, 12K a-a load/UTC LS-54 OPT. Repeat coil balanced/unbalanced input, ECC99 DC driving 300Bs using LL1667/5mA split anode choke. Powered by UTC LS-40 (1050VCT/250 mA) B- driver supply uses damper diodes, LCRC, gas-shunt-regulation, unregulated B+ uses 5U4GB, LCLC, all ASC capacitors. Kimber TCSS and Belden 83XXX stranded CU/TFE wiring. Cardas bare copper binding posts.
Preamplifier (or None if Integrated): Mackie 1202VLZ mixer... mucho headroom with up to +28dbu out, very clean and quiet, lots of control over sources.
Speakers: - JBL 4312, approx. 91db/watt (room)
- Dynaudio BM-15 87db/watt (nearfield)
- Blue Sky 12" powered sub - fixed 80 Hz (don't use much)
Sources:
CD Player/DAC: - Alesis Masterlink 24/96
- DAW with RME 24/96 8 channel AD/DA
- Studer A-80 1/2", 2 track, 30 IPS tape machine

Turntable/Phono Stage: Not yet but soon...
Other Source(s): - ART DIO
- M-audio DUO 24/96
- Boonton 1130
- HP 339A
Other Accessories/Room/Misc.:
Speaker Cables/Interconnects: Radio Shack 16 Ga OFC fine strand zip cables, 25 ft. length. Radio Shack gold plated spades soldered on ends.

Line interconnects - balanced XLR - Belden 1800F, 10 foot length with Neutrik NC3 gold pins.
Other (Power Conditioner, Racks etc.): Xantrex/Trace SW5548 sine wave inverters powered by 780AH/48V deep cycle battery bank.
Sola CVT to filter switching harmonics from inverters
Tweaks: No thanks
Room Size (LxWxH): 19 x 24 x 13
Room Comments/Treatments: Open beam peaked ceiling w/fiberglass bat, 2x6 walls covered with perforated masonite.
Music Preferences and Comments:
Music Used (Genre/Selections): World, Celtic, Classic rock, pop, jazz vocals, eclectic...
System Goals/Comments: Monitoring system for recording studio, mixing and mastering
System Strengths: Great background and imaging, good resolution, great handling of dynamics
System Weaknesses: Speakers, obviously; working on a bi-amp setup with Heil AMT1s and open-baffle Altec 414s.
Video/HT System: None
URL Link: http://redwoodcoastmusic.com
Other Interests/Hobbies/Occupation: computer architect, hardware designer, musician, recording engineer

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