Maintained by the manufacturer! Comes with original box Technology cultivated in the higher-level model C-2850 was introduced into pure analog circuit AAVA volume control. Delicate sounds are expressed in a fresh manner, and the sound quality is full of transparency. The overwhelming quality at low volume is practical. The exterior is generally in good condition. Serial G7Y105 (Yamato Yuki)
Maintenance information: 2025.12.21 maintained (front panel internal indicator, glass cleaning input/output check OK, safety check/pressure resistance check OK)
Accessories: original box, remote control, instruction manual, power cable
Main specifications: 7 input systems (RCA x 5, XLR x 2) output 3 systems (RCA x 2, XLR x 2) size W465 x H150 x D409 mm 19 kg
Maintained by the manufacturer! Comes with original box This is a full change model that enhances the degree of perfection of all P-4100 circuits. The latest instrumentation amplifier system is used for the overall configuration, and it is equipped with a mode changeover switch that allows easy bi-amp or bridge connections, improving convenience. The sound of the traditional 4000 series, which has a wide range and high transparency, has been refined. It is generally in good condition. Serial P5Y422 (Yamato Yuki)
Maintenance information: 2025.12.21 maintained (front panel internal indicator, glass cleaning idling adjustment, input/output check OK, safety check/pressure resistance check OK)
Accessories: original box instruction manual power cable
Main specifications: rated output 90W+90W (8Ω) 180W+180W (4Ω) load impedance 2 to 16Ω (in stereo) input RCA1 system, XLR1 system speaker output 2 systems W465 x H190 x D427 mm 28.9 kg
Maintained in 2021. The dust cover has been made brand new! A masterpiece model of a semi-auto player. The torque and braking power of the motor are excellent, and the stability of operation is impressive. The delicate and deep sound quality brings out the performance of the cartridge well. It has an auto lift-up function and is very easy to use. There is a slight feeling of use over time. Serial 90800158 (Yamato Yuki)
Maintenance information: 2021.10.25 Maintained (motor part removed, shaft and bearing cleaned and lubricated. Replace the tact SW of the operation unit and the electrolytic capacitor on the internal board with a new one. Resolder the board. Remove the area around the arm, clean each part after disassembly, replace the shaft bearing, inspect the internal lead wire, and reassemble. Dust cover hinge reinforcement bracket creation, hinge repair. Exterior cleaning, scratch repair, rotation speed check, operation test of each part, sound test)
Accessories: copy of the instruction manual, EP adapter
Main Specifications: Quartz Lock DD Drive Auto Lift Up Static Balance Type Compatible Cartridge Weight 2 to 12 g Needle Pressure Range 0 to 3 g W490 x H182 x D410 mm 14.5 kg
A flagship turntable tuned by Denon's sound master! The 2.8-kg heavyweight platter and high-rigidity cabinet suppress resonance and are designed to focus on stability and quietness. I have the impression that it reproduces every inch of the sound source information received by the cartridge. The appearance is good with little feeling of use. Serial DCFN112301620 (Murakoshi Yoichi)
Maintenance information: 2025.12.14 sound output confirmed
Accessories: instruction manual, power cord, RCA cable
Main specifications: DC brushless motor speed 33, 45, 78 tone arm: static balance S-shaped platter: die-cast aluminum+stainless steel plate (mass approx. 2.8 kg) Cabinet: made of high-density MDF, solid structure insulator: built-in spring, individual height adjustable power consumption 4 W or less W500 x H185 x D394 mm 18.5 kg (including dust cover)
Vacuum tubes, block capacitors, etc. have been refreshed and maintained with attention to detail so that they can be used for a long time! You can enjoy the rich sound with stable operation. The fresh, glossy tone in the mid to high range has a different appeal from the MC275. There is a feeling of use such as small scratches, peeling prints, etc. (Murakoshi Yoichi)
Maintenance information: 2025.12.20 maintained (diode failure and 2 replacement, 12AX7 x 1 replacement, shield case missing addition, power transformer rewound repair, 100/30 μF and 2 others replacement and insulation cover addition, 20 μF and 3 other electrolytic capacitors replaced, 0.22 μF oil capacitors replaced and 7 others replaced, 2W and 1W 9 resistors replaced, thermistors added, selenium deterioration countermeasures diodes added, vacuum tubes 6L6GC x 4 replacement, RCA jack and vacuum tube socket caulking repair
*Other operation checks have been performed (measured at 32 to 47 W SP: 8 Ω at rated output AC 100 to 117 V)
Accessories: none
Main specifications: 40W+40W vacuum tube CV1947 (6L6G) x 4, 12AX7 x 3, 12AU7x2, 12BH7 x 2, frequency characteristics 16 to 40,000 Hz dimensions W400 x D265 x H195 mm weight 25 kg
※It is inexpensive with large scratches on the frame, top plate, and sides. The S-LH5 is a hidden famous speaker that can also be called a little TAD. TAD technology has been boldly introduced, and the low frequency response is excellent, and the sound is thick enough. The characteristic compression driver+horn makes the mid to high frequencies pop forward, which can be said to be a high cost performance machine that truly surpasses the boundaries of domestic speakers. A feeling of use can be seen on the exterior, dullness, scratches, screw holes on the back, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.16 Operation confirmed
Accessories: saran net
Main specifications: 2-way bass reflex edgeless woofer impedance 6Ω sound pressure level 90dB size W370 x H575 x D328 mm weight 19.2 kg
A bookshelf speaker that uses a vertical twin system! There is also the rich low range of the double woofer and the good localization unique to vertical twins, but after all, the sound is extremely clear. Since the driver was developed by utilizing the TAD design, the piano's stretchability is impressive. You can see the exterior, dullness, peeling veneer, chipped corners, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.19 Operation confirmed
Accessories: saran net
Main specifications: 2 way, 3 speakers, bass reflex, bookshelf type, anti-magnetic design, impedance, 6 ohms, playback frequency band, 35 Hz to 35000 Hz, 88 dB size, W236 x H517 x D309 mm, weight 10.4 kg
Boost transformer for 1990's Orthophone SPU. The core was carefully selected from the specially ordered Hi-Mew Super Permalloy with high magnetic strength for the first time and used. If the impedance is low, it is compatible with various cartridges. Dullness and a feeling of use can be seen. (FUJISAWA KOSHI)
Maintenance information: 2025.12.21 operation confirmed
Accessories: No accessories
Main specifications: input impedance 1 ohm to 6 ohm boost ratio 26 dB frequency characteristics 10 Hz to 100 kHz load impedance 47 kΩ or more size W150 x H108 x D112 mm weight approx. 1.7 kg
silver type. It is a model that can be said to be the flagship of Macintosh. The heavyweight frame, the refreshing blue meter, and the braking power to drive lightly even the large speakers, and the rich, rich tone are just perfect! It's exhilarating to drive the woofer briskly. On the exterior, scratches and a feeling of use can be seen on the top plate. Serial CS2131 (Fujisawa Yukishi)
Maintenance information: 2022.1.22 maintained (power stage Tr check, driver board Tr deterioration, C deterioration, Gain VOL Gal, meter display lamp deterioration, C deterioration in power supply board → all replacement. MODE selector dismantling contact cleaning. Resolder and clean the connector pattern. Operation check)
Accessories: power cord
Main specifications: 500W+500W (1000W when mono) equipped with power guard circuit W483 x D465 x H263 mm 60.3 kg
Anniversary model for the company's 600 series. It is a floor-type speaker designed to reproduce sound that combines power, accuracy, and transparency. There are thin scratches on the sides and overall dullness can be seen. Serial 2045-0014577, 2045-0014578 (Fujisawa Yukishi)
Maintenance information: 2025.12.21 operation confirmed
Accessories: saran net, spikes, rubber feet, jumper plates
Main specifications: 3-way bass reflex type frequency response 48 Hz to 28 kHz recommended amplifier output 8 Ω without clip, nominal impedance 8 Ω (minimum 3 Ω) W320 x H1055 x D370 mm weight 24.1 kg (including pedestal part)
Full maintenance has been completed, such as replacing deteriorated parts, disassembling and polishing switches, etc. The thickness of the mid range and the thickness of the low range are an exciting masterpiece pre-main. The special phono part uses a transformer for built-in MC boosting. This quality is a must-listen for record fans. Compared to lower models, it also has a good sense of SN where you can enjoy classical music. The exterior has a feeling of use such as dullness. Serial 823071541 (Tomonori Asaine)
Maintenance information: 2025.12.21 maintained (men volume dismantling cleaning balance volume exchange output relay, headphone relay replacement switch disassembly and polishing (input selector, reck-out, tone, filter, muting, tape) ⑤ main amplifier transistors (16 pieces), 33ZD diodes (2 pieces) replacement protector section capacitors (2 pieces) replacement tone circuit capacitors (4 pieces) replacement Power supply unit floating resistor exchange volume, switch cleaning pin jack polishing solder repair interior and exterior cleaning operation confirmation)
Accessories: copy of instruction manual
Main specifications: 130W+130W (8Ω) PHONO (MM/MC) 2 systems W460 x H160 x D444 mm 18 kg
Maintenance has been completed, from replacing deteriorated parts to disassembling switches, etc., and polishing contacts! Recommended for those who enjoy all genres of music. It seems to be an amplifier manufactured during the heyday of audio, and it supports music with plenty of room in the mid to low range. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.17 maintenance completed (A output board resistance 100 Ω x 210 Ω x 2 replacement, speaker protection relay left and right replacement, other ATTENUATOR disassembly, polishing cleaning, speaker switching SW,
Cartrich LOAD switching SW, RECOUT selector SW, INPUT tape selector, INPUT selector,
(MUTING push SW, source direct push SW, grease application for each decomposition, polishing, cleaning grease, other input/output RCA terminal cleaning, DC bias adjustment, input/output sound confirmation)
Accessories: none
Main specifications: output 120W+120W MC compatible impedance 4Ω to 16Ω dimensions W470 x H166 x D436 mm weight 26 kg
A popular SAEC tone arm with a double knife-edge structure. It is an arm with excellent workmanship accuracy and is still valuable as a first-class product. It is a popular gem that brings out the full potential of the cartridge. The attached weights are blue (standard). Appearance, dullness, scratches, and a feeling of use can be seen (Kobayashi Hitoshi)
Maintenance information: 2025.12.19 Operation confirmed
Accessories: connection cable, copy of instruction manual
Main specifications: static balance type needle pressure 0 to 4 g total length 311 mm effective length 233 mm overhang 12 mm cartridge dead weight 23 g to 33.5 g (both shells, when using standard equipment weights)
Manufacturer maintained by Marantz Metropolitan Area Service! Marantz channel divider AD-6. Since the cutoff frequency is variable LOW/HIGH, various combinations are possible. For 2WAY+3D systems with a center channel. It can also be used as a 2-way channel divider without using a superwoofer. Although the sound itself isn't as thick as a business process, it's sharp and I like it. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2025.12.18 Manufacturer maintained (flat cable solder repair connecting the input/output terminal board and filter circuit board. Check the through holes on the printed circuit board and the continuity of each track on the printed circuit board. Filter board and power board solder inspection and correction. Each VR and SW contact point cleaning. Check the cutoff, rolloff frequency, and distortion of the LOW PASS, HIGH PASS, and center channel filters. (Running test)
Accessories: instruction manual (copy)
Main specifications: electronic crossover network cutoff frequency LOW/HIGH independence: 70 Hz, 90 Hz, 180 Hz, 300 Hz, 500 Hz, 800 Hz, 1.2 kHz, 3.2 kHz, 5 kHz, 7 kHz, 10 kHz center channel: 50 Hz, OFF, 90 Hz frequency characteristics 10 Hz to 100 kHz size W416 x H44.5 x D300 mm weight 4.8 kg
A classic tweeter used in JBL's successive speakers. Cymbals and wind instruments are vividly played back with a clear, dry sound. There is a lot of feeling of use, such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.20 Operation confirmed
Accessories: none
Main specifications: horn type tweeter unit, alnico magnet, 8 ohms, crossover frequency, 2,500 Hz, allowable input, 20 W, 2 kg
MM/MC compatible A tubular phono equalizer developed with the aim of better analog reproduction. You can enjoy a warm, natural sound using a vacuum tube non-feedback amplifier and a CR-type equalizer. The impedance can be switched according to the cartridge. (TERASHIMA Yuya)
Maintenance information: 2025.12.21 operation confirmed
Accessories: manual, power cable, original box
Main specifications: MM/MC compatible 12AX7 (ECC83) x 2 W300 x H100 x D260 mm 4.8 kg
MC step-up transformer. It features a body structure that thoroughly eliminates magnetic noise. The sound is fresh and smooth. The range is also wide and the sound quality is relaxed and elegant (Mizusaki Ryo)
Maintenance information: 2025.12.21 sound output confirmed
Accessories: none
Main specifications: Compatible cartridge impedance 1.5 to 40 ohms load impedance 47 kΩ boost ratio 26 dB W133 x H85 x 129 mm 1 kg
Power transformer primary: 100V secondary: CT-6.3V/2A, 370V/DC400mA, 5.5A/6.3V x 2, 90V/DC180mA W120 × H107 × D100 mm 6.4 kg There are abrasions and line scratches on the cover (Kojima Yosuke)
Accessories: none
Power transformer primary: 100-110V secondary: 6.3V/1A x 2, 12.6-6.3/1A, 270-0-270V/50mA W83 x H57 x D70 mm 1.4 kg There is paint float on the cover surface (Kojima Yosuke)
Accessories: none
A self-made cable with single/bi-wire specifications using 2 CV-6.2 for each channel with 3.7 m pair end Y lug (WBT-0660CU) specification. The epidermis deteriorates and fades, and the fluff peels off and sticks. The plug shell is cracked or defective, and the +/- identification ring is missing (Kojima Yosuke)
Accessories: none
※There are no operation confirmation issues, but since it is for business use, it will be handed over as is without warranty. Excellent heat dissipation performance due to the servo cooling system. It clearly brings out stable sound quality even when used continuously for a long period of time, and the sound source and pre are simply brought out. The speaker cover is missing on the exterior. There is a feeling of use such as line damage and footprints on the top plate (Ryo Mizusaki)
Maintenance information: 2025.12.21 operation confirmed
Accessories: none
Main specifications: 80 W+80 W (8 Ω continuous output) 110 W+110 W (4 Ω continuous output) 220 W (BTL 8 Ω continuous output) frequency characteristics 20 Hz to 20 kHz +0 -0.5 dB (at 4 Ω 1 W output) dimensions 480 x 102 x 394 mm
※There are no operation confirmation issues, but since it is for business use, it will be handed over as is without warranty. Excellent heat dissipation performance due to the servo cooling system. It clearly brings out stable sound quality even when used continuously for a long period of time, and the sound source and pre are simply brought out. The exterior has multiple line scratches on the top plate (Mizusaki Ryo)
Maintenance information: 2025.12.21 operation confirmed
Accessories: none
Main specifications: 80 W+80 W (8 Ω continuous output) 110 W+110 W (4 Ω continuous output) 220 W (BTL 8 Ω continuous output) frequency characteristics 20 Hz to 20 kHz +0 -0.5 dB (at 4 Ω 1 W output) dimensions 480 x 102 x 394 mm
※There are no operation confirmation issues, but since it is for business use, it will be handed over as is without warranty. High sound quality is achieved by not having an output transformer. Equipped with a high-pass filter switch, it reduces distorted sound when the bass is output too much. The exterior has footprints on the top plate, and there is a feeling of use such as small scratches and dullness overall (Mizusaki Ryo)
Maintenance information: 2025.12.21 operation confirmed
Accessories: none
Main specifications: rated output 60W+60W W480 x H88 x D417 mm weight 11 kg
*Currently sold. D/A converter using the famous Barbraun PCM1796 chip. It is a rare built-in transformer power drive in this price range. You can enjoy sound with a firm structure and good sound loss. This DAC supports 192 kHz/24 bit sampling, but please note that the USB input is compatible up to 48 kHz/16 bit. There is a small wound (Oikawa Tetsuji)
Maintenance information: 2025.12.21 operation confirmed
Accessories: power cable
Main specifications: input USB/SPDIF/TOS sampling frequency 44.1/48 kHz (all inputs) W250 x H50 x D130 mm approx. 1.5 kg
Currently sold. Sony commercial 1U size power amplifier. You can enjoy powerful sound at a low price. There is a line scratch on the top plate (Sasaki Shota)
Maintenance information: 2025.12.21 sound output operation confirmed
Accessories: power cable
Main specifications: 50W+50W (8Ω) 70W+70W (4Ω) W430 × H59 × D380 mm
*Currently sold. Equipped with an IC with a built-in 24-bit DSP. It is an MD player that uses parts such as large capacitors and large resistors to achieve clear sound quality. As for the exterior, there are multiple small scratches on the top plate. The remote control is out of stock (Mizusaki Ryo)
Maintenance information: 2025.12.21 operation confirmed
Accessories: none
Main specifications: W435 x H96 x D288 mm 4.0 kg
※ Y lug on one side is missing. The fixing bracket for the DBS unit is missing and cannot be fixed, so it is inexpensive. This is an excellent model that combines 1.8 m pair single-by-wire thickness with realism (Tamura Eiji)
Maintenance information: 2025.12.21 continuity confirmed
Accessories: none
DENON's classic MC cartridge. The balance of localization and sound is excellent, and all music genres can be played without difficulty. This cartridge can be recommended to a variety of people, from analog beginners to experts. There is dullness on the main body. There are no needle bends. Serial 7271 (Fujisawa Yukishi)
Maintenance information: 2025.12.21 operation confirmed
Accessories: needle cover
Main specifications: MC type output voltage 0.3 mV playback frequency 20 Hz to 45 kHz electrical impedance 40 ohms needle tip 16.5 microns round needle pressure 2.2 to 2.8 g dead weight 8.5 g
Denon's masterpiece during the heyday of analog. The strong sound of extrusion and the smart design not seen in other manufacturers are excellent. There is oxidation and dullness on the exterior (Fujisawa Yukishi)
Maintenance information: 2025.12.21 continuity confirmed
Accessories: phono cable
Main specifications: static balance dynamic damping type, total length 332 mm