Audio Research LS-25 mkII Vacuum Tube Stereo Preamplifier - 6H30pi (No Remote)

Reviews on audio research

 by 604is300 posted on Jan 28, 2020 13:20

audio research ls 25 mkii vacuum tube stereo preamplifier 6h30pi no remote
Good working condition. Please see photos. What you see is what you get. Frequency response±.5dB, 1.0Hz to 100kHz -3dB pionts below 0.2Hz and 400kHzDistortion (THD)Less than .01% at 2V RMS outputNoise & hum14µV RMS residual IHF weighted balanced noise output with gain control at minimum (103dB below 2V RMS output).GainMain Output: Selectable for each input: 18db, 12dB, 6dB Balanced output. (12dB, 6dB, 0dB SE output) Record output: 0dBInput impedance120K ohms Balanced, 60K ohms SE. Inputs (8): Tuner, Phono, CD, Video, Aux 1, Aux 2, Monitor, Processor (XLR and RCA connectors)Output impedance650 ohms Balanced, 325 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3: 2 Main, 1 Record (XLR and RCA connectors)Output polarity Maxi...
Onsale for CAD $ 2,999.00 and shipping from Vancouver, British more on eBay...

 by red-eyedaudio posted on Jan 16, 2020 03:36

audio research sp 9 preamplifier with mkii factory upgrades
Excellent tube hybrid preamp and phono stage Tested. Works. Sounds beautiful.Very nice physical Condition Took photo of internal and sent to Audio Research and they confirmed it was a mkii upgrade...
Onsale for CAD $ 1,712.41 and shipping from Orting, more on eBay...

 by tmraudio posted on Jan 23, 2020 23:31

audio research sp9 mkiii stereo tube hybrid preamplifier mm phono sp 9
The world's largest online retailer of pre-owned audio Product DescriptionWho we areWhat we doOur ProcessOur Policies Audio Research SP9 MkIII Stereo Tube Hybrid Preamplifier; MM Phono; SP-9 Product SKU: 22921 Voltage: 120V # of Owners: 1 Service History: None Serial Number: 04137005 Age: Circa 1996 Tobacco Exposure: No MSRP: $2495 Cosmetic Description: 7/10 Very good cosmetic condition with some minor visible cosmetic wear including some scuffing on the edges of the faceplate. This item has some very light wear but still presents like new from your listening position. What is Included: Preamplifier, Two Genalex E88CC Tubes, Manual, Factory Packaging Other Notes: Hybrid tube/FET stereo preamplifier. "The technical improvements since the MKII are...
Onsale for CAD $ 2,055.15 and shipping from Broomfield, more on eBay...

 by pocok posted on Dec 17, 2019 03:34

audio research d 130 stereo power amp
The D130 is a two-channel power amplifier using advanced semiconductor topology from input to output. Like Audio Research's most recent tube amplifier designs, the D130 uses distributed power supplies (52,000 uF total energy storage) on separate output stage circuit boards to yield a virtual dual-mono layout back to the A.C. power transformer. This layout minimizes signal-path lengths and allows the use of high-purity, low-ESR storage capacitors for quicker, cleaner transient response and better overall musical dynamics. Input impedance is a modest 150K ohms single-ended, making the D130 easy to drive with any Audio Research preamplifier. Multiple-emitter transistors (METs) are used in the output stage; these devices have the electrical ruggedness of a bipol...
Onsale for CAD $ 1,200.00 and shipping from Edmonton, more on eBay...

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