You are viewing a used Yaqin MC-100B tube amplifier that has been meticulously maintained and exceptionally cared for by its owner, an electronic engineer, since acquired. It is in excellent condition, completely operational and functioning according to specification.
Prior to listing, it was completely gone over, tested and verified with a 1kilohertz (1kz) sine wave provided by a TAG 1010 Signal Generator and verified on a B&K Precision 100 Mhz dual trace Oscilloscope for comparative analysis of input/output signal, waveform and amplitude. The amplifier then spent 24 hours (3, 8 hour sessions) on the bench performing an ordinary listening test at normal volume levels to ensure dependability for providing reliable service (line and speaker connections in photos).Upon conclusion, it was thoroughly cleaned, dusted and polished. I did not account for the heat generation from (6) tube amplifiers.
As a result, the amplifier has seen very little actual use and have decided to sell them instead of keeping them stored. An original Yaqin box and packing material are included. This amplifier contains the stock tubes and consists of the following tube-set. KT88 quantity 4 (power output).12AX7AB quantity 2 (preamp voltage amplifiers). 6N8P quantity 4 (preamp drivers coupled to output stage).
Below is a brief overview of the MC-100B and its specifications. Please check my other auctions as I will be listing more equipment. On a side note, I have a dedicated pair in my listening room running in a bi-amp configuration. From personal experience, these amps sound great with various tube combinations. They sound excellent with Gold Lion KT88 and 12AX7 reissue tubes, vintage and reissue Tung Sol 6550's and GE 6550A's.
While doing some tube rolling, I have found some incredible mixes when using vintage Sylvania 6SNGTB chrome domes and Brimar CV4004's or CV4035's (12AX7WA) in the preamp stage (dead quiet) and any of the power tubes previously mentioned (although the grunt of the vintage Tung Sol 6550's are a force to be reckoned with, especially with guitarists, like Page, Clapton, Beck, Van Halen, etc). Class A, 60 watt per channel, true dual monoblock power amplifier with independent power supply for each channel. Beautiful styling with bright copper lacquered chassis and huge potted transformers with curved aluminum tube cage. Front panel inputs to bypass internal preamp so you can use your own preamp or source directly to power amps. User-selected amplifier modes, UT (Ultra linear) mode provides greater output power and TR (Triode) mode provides smooth and rich sound.
Switchable from 60 watts Ultra linear mode to 30 watts pure triode mode. Excellent frequency extension and bass control (fast and tight, not loose). User-selected pure post-stage and integrated modes.Utilizes audiophile grade capacitors and high quality metal precision resistors dedicated in signal path for improved imaging and soundstage. Output transformers are manufactured with Japanese silicon steel sheet and oxygen-free enameled copper and high quality lacquer, providing a wide dynamic range at full rated output. Beautiful heavy duty chassis (stainless steel top, steel bottom), aluminum panel and bezels.
User adjustable bias, test points and tool to refine bias of the output tubes. KT88-98 × 4 (Output Tubes). 6N8P × 4 (Drivers and Cathode followers). 12AX7B × 2 (Voltage amplifiers). 30W per channel (8 and Triode Mode).
60W per channel (8 and Ultra linear Mode). Output Jacks: Two channels with two groups gold plated RCA jacks. Output Impedance: 4 and 8.
Gold plated isolated RCA jacks, 4 groups (CD, DVD, Tape, and Tuner) on rear. Gold plated isolated RCA jacks, 1 group on front as the input of post-stage mode. 0.25V in integrated mode (CD, DVD, and Tuner).
0.6V in pure post-stage mode (Front input connectors). Distortion of Harmonic Wave: 1.5%.Frequency Response: 5Hz 80KHz (-2dB). Signal-to-Noise Ratio: 90dB (A weight). Supply Voltage: AC 115V, 60Hz. Net Weight: 28kg / 61.6lbs. The item "YAQIN MC-100B KT88 Integrated Tube Amplifier Excellent Condition" is in sale since Sunday, October 10, 2021.
This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "nncna" and is located in Gibbsboro, New Jersey. This item can be shipped to United States.