Maintained by the manufacturer in 2024/9! The L-550X is the successor to the L-550, a masterpiece premain amplifier with pure Class A operation. Compared to the initial model, there are no changes other than the addition of an input terminal, and it plays back bright and spacious lacktones. MC compatible, which is great for analog users. The exterior is dull, and there are chips and scratches on the cabinet. Serial B4401324 (Fujisawa Yukishi)
Maintenance information: Maintained on 2024.9.5 Luxman (Rch power transistor replaced. Lch power transistor replacement. Replace resistors, driver transistors, capacitors and fuses. Power amplifier base solder correction. Pilot lamp replacement. Input selector SW contact cleaning and inspection. running test. Overall adjustments. (Operation characteristics test)
Accessories: No accessories
Main specifications: 50W+50W (8Ω) pre-main separation function W453 x H174 x D470 mm 20 kg
The price has been reduced! 2025/9/7 sales price 348,000 yen A new-generation premain amplifier that integrates the performance of a reference separate amplifier into one housing. All stages are balanced from input to output. The smooth tone in the mid to high range is impressive, and it beautifully reproduces vocals, strings, etc. The bass also has a sufficient sense of volume, and the sense of scale is perfect. There are some scratches on the exterior. Serial AHC15190900518 (Yonejima Satoshi)
Maintenance information: 2025.9.7 operation confirmed
Accessories: remote control, instruction manual, power cord
Main specifications: 200W+200W (8Ω) 400W+400W (4Ω) playback frequency band 5Hz to 50kHz input: PHONO (MM, MC) 1 system, 4 analog systems W440 x H168 x D453 mm 21.5 kg
The price has been drastically reduced. 2025/9/3 sales price 178,000 yen Balance volume, panel switch replacement, disassembly, polishing, replacement of deteriorated capacitors, etc. Maintenance has been carried out with attention to detail. This is a pure Class A premain amplifier that combines subtlety and strength. The sound unique to Lux Class A amplifiers, which is smooth, glossy, and has a sense of scale, is attractive. The low frequency playback also has a sense of volume, and it has a reputation for being compatible with European speakers such as TANNOY. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2025.9.3 maintenance completed (balance volume disassembly contact polishing, panel switch disassembly contact polishing, PHONO circuit board soldering correction, capacitor, protection circuit capacitor replacement, input/output pin jack polish)
Accessories: copy of instruction manual
Main specifications: 50W+50W (8Ω), pure A class operation, equipped with a high-capacity toroidal transformer, phono equalizer, MM/MC compatible, W438 x H176 x D467, 30 kg
The price has been drastically reduced. 2025/9/4 sales price 138,000 yen 2025/7 maintenance completed! LUXMAN's line-only premain amplifier. It is a model that omits both the headphone terminal and the remote control, and has thoroughly implemented simple is best. After all, the middle range is thick and the high range is smooth, lax sound. The supple tone gives a sense of security, and the warmth that is similar to vacuum tube amplifiers is attractive. You can see a feeling of use such as appearance, dullness, shine, small scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.7.20 Maintenance completed (defective IC replacement output relay contact defective exchange switch and volume disassembly contact polishing in the power supply circuit)
Accessories: copy of instruction manual
Main specifications: 50W+50W (8Ω) W438 × H155 × D446mm 23.0 kg
※Since there are noticeable insulator marks on the top plate, it is inexpensive. Denon's premain amplifier combines popularity and performance. The resolution is even higher than the previous model, and the sound quality is high and the SN is smooth, and it is a powerful machine that combines the thickness and sense of energy in the mid to low range. It works flawlessly with all genres of music. Serial 9091500994 (Fujisawa Yukishi)
Maintenance information: 2025.9.8 operation confirmed
Accessories: remote control, instruction manual, power cord, original box
Main specifications: output 80W+80W (8Ω) PHONO input (MM/MC) size W434 x H181 x D435 mm weight 24 kg
Denon's first full-size premain compatible with network playback. It uses a two-stage configuration with the same variable gain type preamp and power amplifier as the Denon 110th anniversary model PMA-A110, and the DNA of higher-level models, such as introducing similar high sound quality parts and exclusive custom parts, has been firmly inherited. The appearance is good with little feeling of use (Kobayashi Hitoshi)
Maintenance information: 50W+50W (8Ω) PHONO MM/MC Bluetooth version 5.4 playback sampling frequency DSD2.8/5.6 MHz WMA1, MP3, MPEG-4 AAC32 to 48 kHz WAV, FLAC 32 to 192 kHz Apple Lossless 44.1 to 192 kHz W434 x H131 x D375 mm 8.3 kg
Accessories: instruction manual, remote control, power cable, original box
Main specifications: 50W+50W (8Ω) PHONO MM/MC Bluetooth version 5.4 playback sampling frequency DSD2.8/5.6 MHz WMA1, MP3, MPEG-4 AAC32 to 48 kHz WAV, FLAC 32 to 192 kHz Apple Lossless 44.1 to 192 kHz W434 x H131 x D375 mm 8.3 kg
Comes with original box! An integrated stereo amplifier equipped with an advanced “AAVA volume control” that achieves a high signal-to-noise ratio and low distortion ratio. The power amplifier section has a parallel push-pull configuration with a high power transistor, and the strong power supply unit and low impedance output circuit achieve clear sound with good visibility. It is in good condition with no conspicuous scratches (Oikawa Tetsuji)
Maintenance information: 2025.9.7 operation confirmed
Accessories: power cable, instruction manual, remote control, original box
Main specifications: rated continuous average output 120w/ch (4Ω) 90w/ch (8Ω) damping factor 500 (8Ω/50Hz) W465 × H151 × D420 mm 20.4 kg
Maintained including 16 transistors and 32 capacitor replacements! A vintage model representing JBL. In addition to the extremely powerful and well-extruded sound quality, it also has a dry and tight tone unique to this era. The strong sense of energy in the low frequencies and the characters with clear outlines are excellent matches with old JBL speakers. It is a vintage masterpiece that stands out for its individuality. Serial 6151 (Takasaki Atsushi)
Maintenance information: 2024.6.4 Maintained (Phono stage TR, coupling, pre-section Tr check, replacement. All other couplings C, bypass C, etc. were replaced, power stage Rch, Lch driver Tr was replaced. Main Vol, Balance, TON Cleaning)
Accessories: copy of manual, power cord
Main specifications: 40W+40W (8Ω) W412 × H128 × D350 mm 11.8 kg
The price has been drastically reduced! 2025/9/4 sales price 148,000 yen Maintained! This is the Accuphase sound from the time when the high frequency range was good. The sense of power in the low frequencies is sufficient, and it drives both JAZZ and ROCK systems powerfully. A combination with the JBL 4312 series is recommended. As for the exterior, there are threads and line scratches on the top plate. Serial L2W428 (Yonejima Satoshi)
Maintenance information: 2025.9.4 maintained (balance VR push switch, output relay, and electrolytic capacitor each replaced. Added due to missing legs and screws. Remove deteriorated adhesives and apply silicone adhesives. Bias and offset checks. Output audio check)
Accessories: power cord
Main specifications: PHONO input, pre-main separable, 110W+110W (8Ω) W445 x H160 x D370 mm 17.2 kg
The price has been drastically reduced! 2025/8/22 sales price 79,800 yen This is DENON's mid-range model, and it is a staple machine with excellent stability, with firm bass and delicate high frequencies. In addition to the bass energy from conventional models, you can enjoy well-balanced sound that takes into account the high mid to high frequencies with a high sense of transparency. The exterior has line scratches, bumps, and partial lettering loss. Serial 8031506829 (Fujisawa Yukishi)
Maintenance information: 2025.8.22 operation confirmed
Accessories: power cord
Main specifications: rated output 80W+80W (8Ω) PHONO1 system (MM/MC switching) dimensions W434 x H181 x D480 mm weight 24.0 kg
The price has been reduced. 2025/9/3 sales price 128,000 yen Master volume, carefully maintained, from dismantling and cleaning each switch to replacing the power section transistor! A premain amplifier boasting high driving power, supported by a strong power supply unit typical of Sansui. The sound is soft and transparent, yet also has firm, thick bass. The sophisticated design is also attractive. Exterior, dullness, light rust, scuffs, stains, etc. can be seen (Kobayashi Hitoshi)
Maintenance information: 2025.9.3 maintenance completed (master volume dismantling and cleaning, power amplifier direct switch and other switch disassembly and polishing (input selector, reckout, tape) push switch disassembly and polishing (MM/MC switch, tone, loudness, subsonic, processor) output relay headphone relay replacement power amplifier section transistor replacement (8 pieces) solder repair, etc., volume cleaning, inside Exterior inspection and cleaning, adjustment inspection, side wood veneer repair)
Accessories: none
Main specifications: 130W+130W (8Ω) rated power consumption 330W W471 x H162 x D452 mm weight 23.5 kg
The price has been reduced. 2025/8/28 pre-main amplifier for the Kyo line at a sales price of 49,800 yen. It is a thin, space-saving type that is characterized by its simplicity without tone control, and the clear sense of transparency gives a refreshing impression. The whole thing is dull, and there are scratches on the corners. Serial 5211010311 (Takasaki Atsushi)
Maintenance information: 2025.8.27 sound output confirmed
Accessories: none
Main specifications: output 50W+50W (8Ω) W435×H85×D374mm 9.1 kg
Since nothing other than the analog sound output has been checked, it is currently being sold. 5.1 channel network AV receiver for home entertainment. Wi-Fi Bluetooth AirPlay Spotify Connect MusicCast supports multi-room audio. The exterior has a feeling of use such as dullness. Serial Y599591RT (Tomonori Asaine)
Maintenance information: 2025.9.5 confirmed that only analog sound will be produced
Accessories: Remote control antenna*There is a crack microphone
Main Specifications: Decode Format Dolby TrueHD/Dolby Digital Plus/Dolby Digital/DTS-HD Master Audio/DTS-HD High Resolution Audio/DTS Express/DTS/DTS 96/24 AAC (MPEG-2 AAC5.1ch) /DTS Neo:6 (Music/Cinema) USB Compatible Sampling frequency 96kHz/24bit (ALAC) 192kHz/32bit (WAV*/AIFF) 192kHz/24bit (FLAC), 48kHz (MP3, WMA, MPEG-4 AAC) 11.2MHz/1bit (DSD) 5.6MHz/1bit (DSD) 2.8MHz/1bit (DSD) Linear PCM format only 32bit-float files cannot be played Impedance 6 ohms or more 435 W x 171 H x 377 Dmm 8.8 kg
※It is inexpensive because there are many scratches on the exterior. An AV amplifier that achieves more powerful surround playback by adopting a 6-channel power amplifier with all front, center, and rear amplifiers in a discrete configuration and installing a newly developed Dolby Time Link digital delay. The exterior is dull and has a feeling of use. Serial 2097304027 (Takahashi Nobuyuki)
Maintenance information: 2025.9.52 channel only sound has been confirmed ※Video not checked
Accessories: none
Main specifications: rated output 80W+80W (6Ω, 20Hz to 20kHz, 0.08%, during 2ch stereo playback) W434 x H160 x D427 mm 15 kg
The price has been drastically reduced. 2025/8/26 sales price 99,800 yen Made in 2025, it is a good product with only a small amount of use! Denon's first full-size premain compatible with network playback. It uses a two-stage configuration with the same variable gain type preamp and power amplifier as the Denon 110th anniversary model PMA-A110, and the DNA of higher-level models, such as introducing similar high sound quality parts and exclusive custom parts, has been firmly inherited. The exterior is good (Hiura Katsuji)
Maintenance information: 2025.8.26 sound output confirmed
Accessories: instruction manual, remote control, power cable, original box
Main specifications: 50W+50W (8Ω) PHONO MM/MC Bluetooth version 5.4 playback sampling frequency DSD2.8/5.6 MHz WMA1, MP3, MPEG-4 AAC32 to 48 kHz WAV, FLAC 32 to 192 kHz Apple Lossless 44.1 to 192 kHz W434 x H131 x D375 mm 8.3 kg
The disposal price has been reduced! (Member discounts are not applicable) 2025/8/28 sales price 178,000 yen The volume, switches, etc. have been disassembled and polished and maintained! The next generation model of the L-550, a famous pure Class A amplifier. The very smooth, deafening, warm color sound perfectly matches the delicate sound quality of pure A grade. Analog sounds are also popular, and thick, and supple sound quality can be obtained with both MM/MC. There is a float on the front of the top plate, and there is a feeling of use such as small scratches scattered around. Serial A80612101 (Yonejima Satoshi)
Maintenance information: 2025.8.28 maintained (power circuit ground line corrected) 2025.8.2 maintained (repair adjustment due to failure in the power supply circuit. Output relay replacement. Volume lamp replacement. Switch and volume disassembly contact polishing. (I/O pin jack polish)
Accessories: instruction manual
Main specifications: pure A grade 50W+50W (8Ω) PHONO (MM/MC) PHONO/CD straight circuit system W453 x H174 x D470 mm weight 20 kg
The price has been reduced! 2025/8/30 sales price 138,000 yen Maintained! The fine and highly textured mid-range unique to pure Class A amplifiers is exquisite. It also plays difficult sources such as strings and female vocals in a glamorous manner. The exterior has a feeling of use such as dullness and small scratches. Serial L1501745 (Takahashi Nobuyuki)
Maintenance information: 2025.8.29 maintained (transistor replacement in the power supply circuit, IC replacement in the left and right main amplifier circuit, input/output pin jack polish, switch disassembly contact polishing)
Accessories: copy of instruction manual
Main Specifications: 50W+50W (8Ω) Class A Operation DuoBeta Circuit S Pre-heating Function Line Phase Sensor Mount Frequency Characteristics 10 to 100 kHz Dimensions W453 x H174 x D460 mm Weight 21.4 kg
Marantz mid-class pre-main amp. It excels in the extension and subtlety of the treble, and the thickness of the mid-range sound has been added to make the sound quality satisfying to listen to. It's versatile and easy to use regardless of music genre. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.8.31 Operation confirmed
Accessories: remote control, instruction manual, power cord
Main specifications: rated output 70W x 2 (8Ω) 100W x 2 (4Ω) frequency characteristics 5Hz to 100kHz W440 x H128 x D379 mm 12 kg
Thoroughly maintained, from polishing the internal contacts to exchanging the volume! The standard ES Primain model released in 1986. It is also equipped with a cartridge load selector, making it a perfect car for those who want to use it in a wide range of ways. The sound has momentum and sharpness is attractive. The exterior has small scratches and dullness appropriate for the model year (Oikawa Tetsuji)
Maintenance information: 2025.3.2 maintained (cleaning due to heavy internal dirt, speaker relay deterioration replacement, ATTENUATOR (volume VR) replacement for sound, power lamp red/green disconnection replacement, disassembly cleaning due to poor contact with other HP relays, replacement of 10 locations due to poor circuit board resistance deterioration, and 2 other INPUT selectors, Cartrich selector, RECOUT selector, Cartrich LOAD selector disassembly contacts (Polishing grease application, MUTINGSW, TONESW, disassembly and cleaning, DC bias DC balance adjustment, confirmation of sound output for each connection)
Accessories: none
Main specifications: 105W+105W (8Ω) phono input mm/MC compatible dimensions W470 x H161 x D436 mm weight 18.6 kg
The price has been reduced. 2025/5/14 sales price 59,800 yen The contact system has been thoroughly maintained! A pre-main amplifier that can operate 4 channels simultaneously. The mixing function and channel settings for the 3 microphone inputs can be individually controlled, and the volume of each channel can be individually controlled. The exterior has small scratches and paint peeling on the corner of the front panel top plate (Oikawa Tetsuji)
Maintenance information: 2025.5.14 Maintained (output relay replaced. INPUT selector disassembly contact polishing. Repair anything else that can be disassembled by disassembling it. Since the main volume is special, it cannot be disassembled and the contacts are cleaned. (The panel lamp on this unit has been modified and the white LED is attached, but leave it as it is)
Accessories: none
Main specifications: 4 channel premain amplifier, 2 CH operation, 100 W x 2 (20 Hz to 20 kHz, 8 Ω), 4 CH operation, 50 W x 4 (20 Hz to 20 kHz, 8 ohms), W474 x H150 x D370 mm, 15.5 kg
The price has been reduced. 2025/8/2 sales price 59,800 yen. A mid-range premain amplifier using the new UHC-MOS. Compared to the previous model PMA-1500AE, which had a flat sound, the sense of resolution and sound image localization have been improved. The high signal-to-noise level, which is compatible with the latest sound sources, shines. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.8.2 operation confirmed
Accessories: remote control, instruction manual, power cord, original box
Main specifications: output 70W+70W (8Ω) PHONO (MM/ MC) built-in frequency characteristics 5Hz to 100kHz W434 x H135 x D414 mm 16.1 kg
The price has been drastically reduced. 2025/6/7 sales price 49,800 yen Selector contacts have been disassembled and polished, relays replaced with new ones, etc., and maintained! ONKYO middle class premain amplifier. The characters are delicate and unobtrusive and can handle any music genre flawlessly. It has good performance for introductory subsystems. There are many signs of use on the exterior, such as small scratches. *There is a slight deviation in the scale due to replacement with a balance VR replacement. Serial 6411010658 (Murakoshi Yoichi)
Maintenance information: 2025.6.4 maintained (INPUT selector, REC selector, Cartrich selector, and PASS selector disassembly contacts polishing and cleaning grease application, balance VR replacement, speaker relay replacement, front panel chassis sheet metal correction)
Accessories: instruction manual (copy)
Main specifications: 105W+105W (8Ω) PHONO (MM, MC compatible) W445 x H172 x D434 mm 17.0 kg
*Currently sold. An AV amplifier that has built up Onkyo's 60 years of amplifier manufacturing know-how to achieve thorough noise countermeasures and powerful speaker drives. Custom-made large power transformers and high-capacity capacitors instantly increase current supply capacity. On the exterior, you can see the feeling of use such as insulator marks and small scratches on the top plate. Serial 3957JJ55X0600473G (Jun Tamai)
Maintenance information: 2025.8.24 sound output has been confirmed ※The video has not been checked.
Accessories: Remote control instruction manual, power cable, measurement microphone
Main Specifications: Dimensions W435 x D433.5 x H201.5mm Weight 17 kg
Maintained by the manufacturer! Marantz's premain amplifier with an attractive, thin, and stylish design. It is a best-selling machine that has a supple mid-high range and a well-balanced low range. Combinations with Scandinavian bookshelf speakers are also a good match, so you can choose any music genre. The exterior has dullness due to aging. Serial MZ009706010026 (Asaine Tomoho)
Maintenance information: 2025.8.23 Marantz maintained (mechanical push SW disassembly cleaning. Clean each volume contact. Speaker relay replacement. Soldering fixes for each base. DC offset adjustment. idling adjustment. Inspection of all parts. Operation tests were carried out. Although it is the main volume, there is a slight gang error (Lch is small) when starting up, but since parts are not available, it will remain as is)
Accessories: instruction manual copy power cable (general purpose product) *Remote control not included
Main specifications: 60W+60W (8Ω), 4 line inputs, 1 phono input system (MM/MC switching), 2 tape systems, with pre-out terminals, W458 x H110 x D444 mm, 15 kg
Switches have been maintained, including disassembly and polishing! LUXMAN vintage prime amp from the 60's. Although it is a transistor, it was made in '69, so you can hear the soft, rich sound unique to LUXMAN. The vintage design is a masterpiece that is attractive enough as an interior decoration. The exterior has scratches on the top plate and scratches on the upper front. Serial 10213855 (Yonejima Satoshi)
Maintenance information: 2025.7.27 Maintained (transistors and capacitors have been replaced. Switch type disassembly contact polishing correction. (I/O pin jack polish)
Accessories: No accessories
Main specifications: continuous output 17W+17W W373 x H125 x D227 mm 4.9 kg
The price has been reduced. 2025/7/12 sales price 99,800 yen First arrival, made in 2024! Denon's first full-size premain compatible with network playback. It uses a two-stage configuration with the same variable gain type preamp and power amplifier as the Denon 110th anniversary model PMA-A110, and the DNA of higher-level models, such as introducing similar high sound quality parts and exclusive custom parts, has been firmly inherited. It is in good condition (Oikawa Tetsuji)
Maintenance information: 2025.7.12 operation confirmed
Accessories: remote control, instruction manual, power cable, original box, BT antenna
Main Specifications: 50W+50W (8Ω) PHONO MM/MC Network Type: IEEE 802.11a/b/g/n/ac compliant (Wi-Fi® compliant) Security: WEP 64bit, WEP 128bit, WPA/WPA2-PSK (AES), WPA/WPA2-PSK (TKIP) Radio Frequency: 2.4GHz/ 5GHz Compatible Profile: A2DP 1.3.2, AVRCP 1.6.2 Compatible Codecs: SBC Frequency Band/ Transmission Output/ Communication Distance: 2.4 GHz Band/ Class 1/ Approx. 30m (line of sight) W434 x H131 x D375 mm 8.3 kg
The price has been drastically reduced. 2025/7/4 sales price 46,800 yen An entry pre-main amplifier that inherits the high sound quality technology of the NE series. Equipped with a Bluetooth function, it is possible to play content from smartphones, etc. In addition to 4 analog inputs and a Phono input compatible with mm cartridges, it is equipped with 1 coaxial digital input and 2 optical digital inputs. As for the exterior, there are some threads on the top plate. Serial BLC27241021406 (Murakoshi Yoichi)
Maintenance information: 2025.7.4 sound output confirmed
Accessories: remote control, instruction manual, original box
Main specifications: rated output 45W/8Ω/70W/4Ω compatible impedance 4Ω to 16Ω playback frequency band 5Hz to 100kHz W434 × H122 × D307 mm 7.4 kg
The price has been drastically reduced. 2025/1/20 sales price 49,800 yen Each SW class has been disassembled and maintained, such as contact polishing! Onkyo's unique supercurrent amplifier configuration is used for the power section, and the smooth sound is impressive with a circuit that combines a MOS FET and a bipolar transistor. The sense of power in the low frequencies and the extension in the high frequencies play a slightly different sound from the others. Serial 6110010627 The exterior has small scratches, dullness, and a feeling of use (Katsuji Hiura)
Maintenance information: 2025.1.18 maintained (INPUT selector (motor life) SW, source direct SW, Cartrich MM/ MCSW, speaker SW, REC selector SW, polishing grease UP for each disassembly contact, replacement of other speaker relays, partial crack solder repair for each board solder crack, DC idling adjustment, input/output connection sound confirmation)
Accessories: none
Main specifications: 80W+80W (8Ω) W455 × H170 × D430 mm 17 kg
Yamaha premain amplifier compatible with DSD 5.6 MHz native playback and PCM384 kHz. It is equipped with cutting-edge equipment such as a USB DAC function, and has a convenient design that can be easily operated with only knobs and buttons, and boasts a clear and wide range that matches the times. As for the exterior, there are scratches, dirt, etc. on the top plate. Serial Y066426TV (Tomonori Asaine)
Maintenance information: 2025.8.12 operation confirmed
Accessories: remote control instruction manual power cable
Main specifications: 100W+100W (8Ω) input 9 systems (CD x 1 tuner x 1 line x 3 phono MM x 1 optical digital x 1 coaxial digital x 1 USB Type B x 1) output 5 systems (reck-out x 2, subwoofer x 1, headphone x 1, USB-DC out x 1) W435 x H152 x D387mm 12.1 kg
The price has been reduced. 2025/6/21 sales price 49,800 yen Main volume replacement, switch disassembly, contact polishing, etc. have been completed! Denon's 80s pre-main amp. DENON of this era emphasizes the mid-range and neutral sound quality, so you won't get tired of listening, and the tuning regardless of genre makes a good impression. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.6.21 Maintained (main volume replaced. Other switch disassembly contact polishing. (I/O pin jack polish)
Accessories: none
Main specifications: 105W+105W (8Ω) 125W+125W (6Ω) W434 x H139 x D414mm 10.6 kg (including feet, knobs, terminals, etc.) 10.6 kg: