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jt1stcav's Straightforward Two-Channel Single-Ended Triode Audio System
IP Address: Last Update: March 25, 2009 at 18:37:11
Amplifier: 2003 BEZ Model T3B Class-A Single-Ended Triode Stereo Power Amplifier:

Class-A zero negative feedback stereo power amp, utilizing a pair of heavy duty single-ended output transformers made with Z10/0.35mm thick high grade silicon/steel EI plates and wound with 4N oxygen-free copper wire, along with a heavy duty EI core power supply transformer, filter choke, 1% red metal film resistors, paper-in-oil AC coupling capacitors, and point-to-point wiring, Power AC cord is a heavy-duty 3' SignalCable MagicPower. Four solid brass Dayton Audio isolation cones. Power output: 6.5Wpc x 2 @ 8 & 4 ohms (pure class-A). Frequency response: 20Hz-30kHz. S/N ratio: 90dB. Total harmonic distortion: 1% @ 10W/1kHz. Input impedance: 500k ohms. Input sensitivity: 0.5-1V RMS.

Tube compliment:

Matched pair new 2006 Electro-Harmonix 300B-EH power output tubes.

NOS '40s Canadian Westinghouse 6K7G driver tubes.

NOS '50s Mullard GZ37 rectifier tube.
Preamplifier (or None if Integrated): 2003 BEZ Model Q4B Linestage Vacuum Tube Preamplifier:

SRPP linestage preamp, utilizing an 80W EI core power supply transformer, dual NOS M.B.L.E. 2HYS chokes, dual NOS MEPCO/Electra 250uF electrolytic capacitors, along with point-to-point wiring, paper-in-oil AC coupling capacitors, 1% red metal-film resistors, and a 23-step attenuator with 1/4W (1%) resistors. One pair output, three pair input RCA jacks. Power AC cord is a heavy-duty 3' SignalCable MagicPower. Four solid brass Dayton Audio isolation cones. Frequency response: 20Hz-100kHz. S/N ratio: 96dB. Output voltage: 2.0V RMS (max 25.0V RMS).

Tube compliment:

Matched pair NOS '50s RCA 6SN7GTB blackplate SRPP amplifier tubes.

NOS 1958 RCA OC3 ST-shaped regulator tube.

NOS 1967 RCA OD3 ST-shaped regulator tube.

NOS '50s Mullard GZ30 rectifier tube.
Speakers: 2004 Klipsch RB-75 Reference Series Bookshelf Loudspeakers:

RB75CH Reference Series models in solid cherry cabinets, with a 1.75" titanium-dome K-50.1-DB compression tweeter driver on an 8" square 90x60 Tractrix high frequency horn, and an 8" mid-bass K-1128-OB Cerametallic cone/cast woofer driver with a rubber surround and polymer frame; frequency response: 42Hz-20kHz (3dB); sensitivity: 97dB @ 1 watt/1 meter; nominal impedance: 8 ohms; crossover point: 2kHz; recommended power: 150W max continuous, 600W peak. Mounted on a pair of 2005 Atlantis Pro Series 28" speaker stands.

2005 Dayton Audio DLS300-632 10" Powered Subwoofers (two):

Single down-firing 10" long throw coated paper driver with a rubber surround and vented pole piece, bass reflex loaded with a flared front port in a 3/4" MDF internal braced Black Ash vinyl veneer enclosure. Amplifier is class-A/B design and features gold-plated line-level and speaker-level inputs and outputs, phase reversal switch, gain control, auto on/off with LED, variable controlled 12dB electronic low pass filter, and a 6dB high pass filter; frequency response: 25-160Hz (3dB); power output: 100 watts RMS into 8 ohms @ 0.1% THD; S/N ratio: 90dB A-weighted; crossover frequency control: continuously variable from 40-160Hz @ 12dB/octave; 6dB high pass circuit: 125Hz @ 8 ohms.
CD Player/DAC: 2004 Cambridge Audio azur 640C Compact Disc Player:

Single disc transport player with Wolfson WM8740 24-bit/192kHz DAC, proprietary data reclocking, and three seperate power supplies for digital to analog circuitry/audio filter stages/regulator stages. Power AC cord is a heavy-duty 4' SignalCable DigitalPower-HC. Four black chrome solid brass isolation dampening cones from Dayton Audio. Frequency response: 10Hz-20kHz. Total harmonic distortion: <-92dB. Dynamic range: >105dB. Channel seperation: >75dB. Jitter: <260pS.
Turntable/Phono Stage: 1979 Technics SL-1700MK2 Quartz Direct-Drive Semiautomatic Turntable (with a 2004 SiennaGold STB-438 solid stainless-steel record stabilizer clamp).

1983 Stanton Magnetics 981HZS Professional Calibration Standard MM Cartridge:

Cartridge utilizes a D98S "Longhair" Stereohedron low impedance elliptical diamond stylus, mounted in an ultra-low mass samarium cobalt armature (0.02mg); tracking force: .75-1.5 gm; frequency response: 10Hz-<50kHz (calibrated to 20kHz); channel separation: 35dB @ 1kHz, 25dB @ 10kHz; inductance: 450mH; resistive load: 47k ohms; capacitive load: 275pF; weight: 5.5 gm. Connected with 2005 Sumiko HS-29 silk covered OFC headshell leads with brass tips.

2004 Music Hall MMF-Phono Pack MM/MC Phono Preamplifier:

Preamp has three-position switching between loading for 47k ohms and 100 ohms moving magnet and low output moving coil cartridges.
Other Source(s): 1997 Nakamichi DR-1 Cassette Deck:

Discrete three heads, with Dolby B & C noise reduction, tape monitor, and playback head azimuth tuning control. Frequency response: 20Hz-21kHz (3dB). S/N ratio: 72dB (Dolby C). Total harmonic distortion: <-0.8% @ 400Hz/0dB/Type IV. Channel seperation: >37dB. Crosstalk: >60dB @ 1kHz/0dB. Bias frequency: 105Hz.
Other Accessories/Room/Misc.:
Speaker Cables/Interconnects: 2002 Canare Star Quad 4S11 Speaker Cables:

11 AWG, eight foot twisted pair of four 14 AWG OFC conductors, unterminated.

2005 Mandaville Grounded Interconnects:

Assembled by Erik Mandaville of the Klipsch Forums, using 10' length Dayton Professional MSC-1 signal cables, made of two 22 AWG OFC conductors, 92% coverage bare copper braid shielding, terminated with Neutrik NYS352G heavy-duty machined brass, nickel plated RCA connectors with gold plated contacts.

2003 MagWire Naked Interconnects:

Twisted pair of a single OFC magnet wire, terminated with Neutrik NYS352G RCA connectors.
Other (Power Conditioner, Racks etc.): 2001 Monster Power HTS 5000 PowerCenter Line Conditioner.
Tweaks: None really, unless you consider all the Dayton Audio isolation cones.
Room Size (LxWxH): 13.5' x 13.5' x 8'
Room Comments/Treatments: The room's way too small, and it could use some treatment. It'll have to do for now.
Music Preferences and Comments:
Music Used (Genre/Selections): Classical music from the Baroque to the Romantic periods, especially compositions written for the pipe organ. Also jazz, blues, classic rock from the late '60s thru the '80s, some alternative, industrial, and New Age as well.
System Goals/Comments: Would eventually like to upgrade my CD player for one with a vacuum tube output stage (from JoLida, Ajoe Tjobe, Shanling, et al).
System Strengths: I believe I have the makings for a first-rate single-ended audio system. My 6SN7 linestage preamp is very smooth and blends perfectly with my horn-loaded monitors. My 300B SET amp is also a perfect combination with my preamp...the entire system is very accurate, dynamic, and extremely musical to my ears.
System Weaknesses: My present room is way too small; in the near future I plan on relocating my audio system to a much larger room in the house.
Video/HT System: None
URL Link: http://www.freewebs.com/jt1stcav/
Other Interests/Hobbies/Occupation: Besides audio, I enjoy all things related to pipe organs, their construction, and all classical music composed for them, along with collecting antique tube radios, photography, and bicycling.

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