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Todd Krieger's Main System
IP Address: Last Update: July 24, 2020 at 05:58:33
Amplifier: Don Allen-modified Bogen MO-100 monoblock tube amplifiers (75 wpc push-pull in current configuration).

Alternative amplifier:
Don Allen modified Bogen MO-30 monoblock tube amplifiers. (30-watt push-pull.... Use during summer months.)

Tube complement, per monoblock amplifier: 2 Genelex KT88 (new production) power (biased for longevity), 1 Tung-Sol ECC803S (12AX7) signal, 1 Globe Philco Type 37 (via 6J5 adapter), 1 RFT "white print" EZ81 rectifier, 2 GE "Copper Plate" 5AR4 rectifiers.

MO-30 Tube complement per monoblock: 2 TheTubeStore 7581A (6L6), 1 GE 6135, 1 Tung-Sol ECC803S (12AX7), 1 GE Copper Plate 5AR4.
Preamplifier (or None if Integrated): Don Allen Gen III 4-Tube Dual Mono line stage.
Speakers: Von Schweikert Audio 'VR4.5 Mod VR-5'
CD Player/DAC: Don Allen-modified Philips CDC-935 CD changer. With 1976 Voskhod 6N23P (Russian 6922).
Turntable/Phono Stage: Teres/Redpoint hybrid turntable- Quattro Aluminum/PVC platter, Opera Consonance T1288 12' tonearm, Audio Technica ART7 phono cartridge. Driven by Jasmine TM-R501 Turntable Motor with custom belt.

Ryan Sound Lab RSL phono stage with Silk Audio MC-220A step-up transformer, custom 1:20 with 50 ohm input impedance (special order).

Home Depot 'commercial' vinyl tile (cut to platter dimensions) damping topped by Funk Firm Archromat turntable mat. 115g record clamp/weight.
Other Source(s): FM Tuner: JVC KT-HDP-1 HD radio tuner
Other Accessories/Room/Misc.:
Speaker Cables/Interconnects: Silverline Audio Bi-Wire speaker cables, Morrow Audio MA5 (new version) and Grover Huffman Empress interconnects, Audio Envy interconnect (RCA-RCA) for phono cable. Volex 17604, Audio Envy, and Gotham "85055" power cords (Wattgate connectors).
Other (Power Conditioner, Racks etc.): MSB Technology isolation plate underneath transport. Black Diamond Racing shelf with Stillpoints isolators under turntable. Tripp-Lite voltage regulation. Two ZeroSurge 2R20 surge protectors for component protection- One for line-level electronics, the other for power amp. OneAC CP-1110 transformer/conditioner for line level components. Topaz 01P3 ferromagnetic line conditioner for CD player and phono stage.
Tweaks: Two dedicated 20A lines, one for power amp, other for line-level electronics. Hubbell Cryo IG5362 outlets.
Room Size (LxWxH): 19' x 16' x Slanted
Room Comments/Treatments: System placed along short wall, with ceiling sloped downward toward system. Speakers placed about 5' into the room.
Music Preferences and Comments:
Music Used (Genre/Selections): Everything- Orchestral, jazz, pop, rock, country, new age, international, oldies, exotica, etc.
System Goals/Comments: Bring the live performance to the listening room. Combination of accuracy and pleasing to the ear. A high-power system with effortless dynamics of low-power single-ended.
System Strengths: Microdynamics and overall dynamic range. Image specificity. Expansive soundstage. Transparency and soundstage maintained through wide dynamic swings and complex passages. True full-range response- 'Gestalt!!' The best of both high-power and SET sonics.
System Weaknesses: VSA speakers over time developed an 'antique checkering' cosmetic flaw. Bogen MO-100 amps might get reduced use during hot AZ summer months- Tubes generate a lot of heat. (But the MO-30s are used during the summer, generate less heat.)
Video/HT System: None
Other Interests/Hobbies/Occupation: Sports- Tennis anyone??

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