Vintage Audio Lab tube MM-77 phono stage using 2 x 12AX7 and 1 x 12AT7 tubes and pretty good quality parts overall. I bought this unit off of the Valab store on eBay a couple of years ago and it sounds very, very good. It has actually seen little use over the past year as I upgraded to a Benz Micro Glider cartridge which is moving coil. Paypal please add 3%. The first picture is my unit and the other 3 are from the Valab page. From the Valab product page: Sheer Audio MM-77 Handbuilt Tube Phono Preamplifier We are so happy to introduce this tube phono preamp to our customers on ebay. This phono preamp is design and handmade by Sheer Audio, a most credit audio design house in Taiwan. This is best phono preamp we ever hear. Features of MM-77 Tube Phono Preamplifier
1. Two chassis design, power supply section was seperate from main citcuit to get best signal/noise ratio.
2. Multiple stage voltage regulator for high tension and filament. Clean and sufficient electric supply is most important basis for good sound.
3. 4 stage CR/NF RIAA circuit offer most accurate RIAA curve/
4. Best parts usage inside including WIMA mkp caps for coupling. all resistors use Philips metafilm precision resistor, long crystal OFC copper internal wires and CMC RCA gold plate plugs..... All very high quality parts was used in this product.
5. Handmade product by skilled tube electric specialist. Every MM-77 will be carefully assembly and pass 24hours burn-in test before shipping out.
6. Only for MM cartridge, need step-up transformer for MC cartridge.
How it sound?
MM-77 have very accurate RIAA curve, so it deliver precision and balance tone. It must be most accurate sound from vinyl record we ever hear. MM-77 have very good S/N ratio and very high resolution, offering vivid, detail and very sweat sound. Specification:
power consumption: less than 15W
main voltage: 100V,120V, 200V, 230V or 240V AC@50/60Hz
inputs: 1 stereo single-ended(RCA)
outputs: 2 stereo single-ended(RCA) for High and Low output (50% output volatage for high gain amp)
gain: 200x
S/N: 88dB
frequency Response: 10Hz~20kHz +- 0.5db
weight: 7kgs
tube usage: 2x 12ax7 and one 12at7
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