By simply sandwiching it between the CD or DAC and the amplifier, the sound gathers at the center when you turn the knob of a line amplifier that changes the digital sound source to an analog-like warm and realistic sound. The exterior has a feeling of use such as dullness (Tomoho Asaine)
Maintenance information: 2026.2.1 sound output confirmed
Accessories: none
Main specifications: size 108 x 45 x 140 mm, weight 389 g (actual measurement)
Passive attenuator using Seiden ALAT3210S. Both input and output are RCA only. There is an insulator mark on the top plate (Oikawa Tetsuji)
Maintenance information: 2026.2.1 operation confirmed
Accessories: none
Main specifications: W90 x H67 x D165 mm 380 g (actual measurement)
The disposal price has been reduced! (Member prices are not applicable) 2026/1/19 sales price 798,000 yen with original box, 3D microphone for measurement, and Wi-Fi USB adapter! Batteries are being replaced and inspected at Stellar. This is TRINNOV's sound optimizer. With the current best sound correction technology, you can easily improve the acoustical characteristics of a room. Acoustic characteristics are measured with a unique 3D measurement microphone, and the built-in microprocessor measures and corrects the room's low-frequency acoustic characteristics, group delay characteristics, phase characteristics, and impulse response. With VNC connected to a LAN, it can be operated with a PC, Mac, iPad, iPhone, or Android device without the need for dedicated software, etc. The exterior is generally good. Serial S-000514 (Tomonori Asaine)
Maintenance information: 2026.1.18 Maintained (backup battery replacement operation confirmed)
Accessories: instruction manual, power cord, 3D microphone, microphone connection cord, Wi-Fi connection, USB adapter, original box (main unit only)
Main specifications: analog input terminal/XLR x 2, RCA x 2 digital input terminal/AES/EBU x 1, S/PDIF, RCA x 1 analog output terminal/XLR x 2 digital output terminal/AES/EBU x 1, S/PDIF, RCA x 1 W441 x H97 x D418 mm approx. 9.4 kg
*Currently sold. Vacuum tube graphic equalizer in the ONTOMO MOOK appendix. 5 bands (55, 220, 880, 3.5 k, 14 kHz) can be adjusted by ±8 dB. It comes with an ON/OFF switch for the GEQ function, so you can play easily. There are no visible scratches on the exterior, etc., and it is only dull (Murakoshi Yoichi)
Maintenance information: 2026.1.25 sound output confirmed
Accessories: power cord
Main Specifications: Input Impedance: 500 kΩ Output Impedance: 330 Ω Frequency Characteristics: 20 to 100 kHz S/N Ratio: 100 dB Crosstalk: 80 dB or less W183 x H120 x D88 mm 0.9 kg
The price has been reduced. 2026/1/27 sales price 24,800 yen. An entry-level network audio server. By inheriting the software technology cultivated with “fidata,” it can also be used as a network audio player by combining it with a USB-DAC. It can be said that the exterior is good with little feeling of use (Murakoshi Yoichi)
Maintenance information: 2026.1.27 sound output confirmed
Accessories: power cable, instruction manual
Main specifications: HDD2TB equipped USB-DAC output format PCM format (44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz, 705.6kHz※, 768kHz※) *wav, aiff only DSD format (DoP) (2.8 MHz, 5.6 MHz, 11.2 MHz) W168 ✕ H43 ✕ D134 mm 1.2 kg
Graph equalizer with spectrum analyzer. The variable width can be switched between 6 dB and 12 dB. It's easy, but you can make fine adjustments, and I think it will help you create the sound you like. The exterior is dull and there is a feeling of use such as scratches on the top plate. Serial 8031663 (Takahashi Nobuyuki)
Main specifications: size W370 x D320 x H95 mm weight 4.0 kg
*Currently, internal battery operation has been confirmed. An ultra-compact portable headphone amplifier with built-in DAC from the American HEADAMP workshop. The powerful sound that is disproportionate to the small housing is attractive. Peeling can be seen on the leather case. (FUJISAWA KOSHI)
Maintenance information: 2026.1.26 Operation confirmed
Accessories: instruction manual (English characters), AC adapter, leather case
Main specifications: 2 inputs (3.5 mm stereo mini, miniUSB), 1 headphone output (3.5 mm stereo mini)
*Currently sold. Audio-Technica compact mixer with built-in MM phono equalizer. This introductory model is recommended for those who want to use a mixer from now on. There is a feeling of use (Takasaki Atsushi)
Maintenance information: 2026.1.18 sound output confirmed
Accessories: instruction manual power cable
Main specifications: W190 ✕ D63 ✕ H234mm 1.3 kg
Fidelity-Research system selector with 3 input terminals, 1 output terminal, and 1 REC out system. This selector has a reputation for its ease of use and good sound quality. The exterior has a sticker on the top plate, and there is overall dullness (Mizusaki Ryo)
Maintenance information: 2026.1.24 sound output confirmed
Accessories: none
Main specifications: Dimensions: W115 x H68 x D140 mm Weight: 1.0 kg (actual measurement)
Comes with a wooden cabinet! Mono specification. Commercial passive faders. It is an attractive fader with a rich and deep sound. A carbon film slide resistor is used. It is an RCA input/output terminal. There are small scratches on the exterior. Serial 1030 (Yonejima Satoshi)
Maintenance information: 2026.1.24 Operation confirmed
Accessories: No accessories
Main specifications: W65×H215×D150mm
A passive controller with minimal functionality packed tightly and compactly. You can level, mute, and monossum stereo sources. The appearance is good with little feeling of use (Kobayashi Hitoshi)
Maintenance information: 2026.1.10 Operation confirmed
Accessories: instruction manual, original box
Main specifications: input XLR/standard phone jack composite 1 system mini phone jack 1 system output XLR/standard phone jack complex 1 system mini phone jack 1 system W145 x H69 x D85 mm 0.4 kg
Digital sound repair machine. By predicting an ultra-high frequency range of 20 kHz or more and outputting it in addition to the original sound, it feels smooth, and the sound quality changes to very comfortable to listen to. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2026.1.18 Operation confirmed
Accessories: instruction manual, original box
Main specifications: RCA input/RCA output 1 system each, EFFECT 5 stage switching W132 x H71 x 334 mm 960 g
The disposal price has been reduced! (Member prices are not applicable) 2026/1/8 sales price: 108,000 yen, beautiful item with box! Marantz wireless streaming amplifier. It is equipped with a Class D amplifier with 100W/ch output in a compact housing that can be installed anywhere. You can enjoy high-resolution sound sources on your favorite platform, such as supporting HEOS, Airplay 2, Bluetooth, and Spotify Connect. Serial MCHX082401083 (Fujisawa Yukishi)
Maintenance information: 2026.1.6 operation confirmed
Accessories: instruction manual, power cord, connection cord, original box
Main specifications: 100W+100W (8Ω) decoding: Dolby Digital Plus, Dolby Digital, LPCM, DSD compatible audio formats: WMA, AAC/MP3, FLAC (maximum 192 kHz/24 bit), DSD (2.8 MHz/5.6 MHz) Bluetooth version 4.2 W217 x H84 x D239 mm 2.2 kg
The disposal price has been reduced. Member prices are not applicable. 2025/11/25 sales price 238,000 yen SSD 1TB type. A digital audio solution that provides everything from sound source capture to playback in one stop. Built in Diretta Host. It is equipped with an audio-quality media server function, USB-DAC support (network transport function), CD ripping function, and CD transport function. Various digital sound sources, from CD ripping to high-resolution sound sources, can be played back in high definition (Oikawa Tetsuji)
Maintenance information: 2025.11.25 Operation confirmed
Accessories: instruction manual, power cable, original box
Main specifications: USB-DAC output format PCM format (44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz, 705.6 kHz, 768 kHz) DSD format (DoP) (2.8 MHz, 5.6 MHz, 11.2 MHz) LAN interface 1000BASE-T, 100BASE-TX, 10BASE-T USB port USB 2.0 x 1 Network UPnP AV, DLNA1.5 external dimensions W350 x H64 x D350 mm mass approx. 6 kg
The disposal price has been reduced! (Member price not applicable) 2025/12/26 sales price 898,000 yen Comes with a 3D microphone for measurement (140,000 yen) and a Wi-Fi USB adapter (25,000 yen)! This is TRINNOV's sound optimizer. With the current best sound correction technology, you can easily improve the acoustical characteristics of a room. Acoustic characteristics are measured with a unique 3D measurement microphone, and the built-in microprocessor measures and corrects the room's low-frequency acoustic characteristics, group delay characteristics, phase characteristics, and impulse response. With VNC connected to a LAN, it can be operated with a PC, Mac, iPad, iPhone, or Android device without the need for dedicated software, etc. There are no noticeable scratches on the exterior. Serial S-000351 (Fujisawa Yukishi)
Maintenance information: 2025.12.26 operation confirmed
Accessories: instruction manual, power cord, 3D microphone for measurement, microphone connection cord, Wi-Fi USB adapter
Main specifications: analog input terminal/XLR x 2, RCA x 2 digital input terminal/AES/EBU x 1, S/PDIF, RCA x 1 analog output terminal/XLR x 2 digital output terminal/AES/EBU x 1, S/PDIF, RCA x 1 W441 x H97 x D418 mm approx. 9.4 kg
Digital sound repair machine. By predicting an ultra-high frequency range of 20 kHz or more and outputting it in addition to the original sound, it feels smooth, and the sound quality changes to very comfortable to listen to. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2025.12.27 Operation confirmed
Accessories: none
Main specifications: 1 RCA input/RCA output each, 5 stage effect switching size W132 x H71 x 334 mm weight 960 g
An analog reconstructor to cut digital noise. The analog signal converted by a D/A converter is temporarily replaced with light, high frequency noise is completely removed, and then converted back into an electrical signal. In terms of sound quality, it changes to a pleasant sound with improved S/N. *XLR is #3 HOT. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2025.12.27 Operation confirmed
Accessories: instruction manual
Main specifications: 2 input/output systems each (RCA/XLR) W482 x H50 x D275 mm 2.1 kg
It is a clock that uses carefully selected parts and optimized circuits to reliably improve sound image localization. You can enjoy refined and delicate sound quality, high SNR, and a sense of transparency. The exterior is good with no conspicuous scratches. Serial ULPN (Satoshi Yonejima)
Maintenance information: 2026.1.4 operation confirmed
Accessories: power cord, connection cord
Main specifications: port quantity 6 outputs (square wave x 3, sine wave x 3) output impedance square wave: 50 ohm x 2, 75 ohm x 1 (default) sine wave: 50 ohm x 2, 75 ohm x 1 (default) W240 x H50 x D175 mm
The disposal price has been reduced. Member prices are not applicable. 2024/12/16 sales price 128,000 yen Internal thorough disassembly, cleaning & replacement of deteriorated parts! UREI's 27-band graphic equalizer. It is only for commercial use, and is useful in clubs, halls, etc., and of course there are many bands, but there is little sound loss, and it works well in the band you really want, so you can create your favorite sound. The exterior is generally dull and has scratches (Oikawa Tetsuji)
Maintenance information: 2024.12.16 Maintained (serial NO4480 has 13 slider pot resistors replaced and slider pot resistor connection defects repaired. Also, the movement of the knob is heavy and astringent even when grease is applied. There are good ones, but please note that the knobs are long and structurally poor. (Gain changeover switch and slope switch replacement x 4, serial No. 3391 has good cleaning procedures, XLR wiring correction procedures, sound output tests after gain installation, and changes for each band due to insufficient gain volume)
Accessories: copy of the manual
Main specifications: 27 bands (20 Hz to 20 kHz) mono graphic EQ W482 x H90 x D205 mm 5.3 kg/unit
The price has been drastically reduced. 2025/12/27 sales price 250,000 yen*For business use, it will be handed over as is. dbx digital multiprocessor. Equipped with functions such as effectors, equalizers, delay routing, etc. necessary for sound output systems, PC control can be performed from the dedicated software System Architect, which is flexible to scale and application. You can see a feeling of use such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.27 simple sound output confirmed
Accessories: power cable
Main specifications: 4 channel analog input XLR/electronic balance 4 ch, digital input 4 ch, RTA microphone input 1 system analog output XLR x 8 ch, digital output AES/eBU x 8 ch AES/eBUW483 x H89 x D284 mm 5.5 kg
※There was a slight crack at the time of check. This time, we will sell it as is. Comes with wood cabinet A pretty rare Macintosh equalizer. It can be adjusted in 3 parts: LOW, MID, and HIGH. In particular, the LOW position can be controlled independently on the left and right. You can see chipped veneer and small scratches on the exterior and cabinet. Serial 4V302 (Kobayashi Hitoshi)
Maintenance information: 2025.12.26 Operation confirmed
Accessories: Copy of instruction manual (English characters)
Main specifications: 3-band split environmental equalizer LOW5 stage MID5 stage HIGH5 stage W405 ✕ H78 ✕ D245 mm weight 2.7 kg
Currently sold. A compact headphone amplifier. The sharpness of the mid to high frequencies is good, and the refreshing sound is impressive. It can also be connected to an iPod, making it an easy to use car. The appearance is fine, with no noticeable scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.30 Operation confirmed
Accessories: power cable
Main specifications: 2 output systems, 400 mV x 2 (32 Ω/16 Ω), frequency characteristics, 10 to 200 kHz, channel stroke, 66 dB, W90 x H90 x D50 mm (including knobs), weight 412 g
*Since the video system has not been checked, it is currently being sold. 7.1ch AV surround receiver Equipped with a full discrete power amplifier with a maximum output of 100W. Compatible with Wi-Fi, AirPlay, and BluetoothR The realism of 3D surround is achieved even without surround speakers. Serial BHS36190500464 (Takasaki Atsushi)
Maintenance information: 2025.12.25 Operation confirmed (only sound confirmed. (Video unchecked)
Accessories: instruction manual, remote control, power cable, connection cable, antenna, original box
Main specifications: front output 50W (20Hz to 20kHz, 8Ω) 70W (1kHz, 6Ω) center output 50W (20Hz~20kHz, 8Ω) 70W (1kHz,6Ω) surround output 50W (20Hz~20kHz, 8Ω) 70W (1kHz,6Ω) sampling frequency WMA/MPEG-4 AAC: 32, 44.1, 48kHz WAV: 32, 44.1, 48, 88.2, 96, 176.4 , 192 kHz FLAC · ALAC: 44.1, 48, 88.2, 96, 176.4, 192 kHz size 440 x 105 x 378 mm weight 8.4 kg
The price has been reduced! 2025/12/21 sales price 138,000 yen A line transformer using 2 Western Electric repeat coils REP170B. The 600 ohm: 600 ohm winding ratio is 1:1. The strong analog sound with thick mid and low frequencies is attractive. There is a feeling of use such as rust floating on it, paint peeling, etc. (FUJISAWA KOSHI)
Maintenance information: 2025.12.21 operation confirmed
Accessories: No accessories
Key Specifications: Line Transformer 600 Ohms: 600 Ohms Winding Ratio 1:1 W150 x H135 x D120mm
3rd generation voicing equalizer. Sound field correction/sound field creation is possible freely in the listening room by simply operating the touch panel screen with a single pen. How about a companion to your pursuit of a music space of your choice? Serial F0Y636 (Fujisawa Yukishi)
Maintenance information: 2025.12.27 operation confirmed
Accessories: remote control, instruction manual, power cable, original box, microphone, microphone holder, microphone cable
Main specifications: 35 band real-time playback frequency characteristics 0.5 to 50,000 Hz (sampling frequency 2.8224 MHz or 192 kHz) 4.0 to 20,000 Hz digital input/output: HS-Link, coaxial digital, 1 optical digital system each dimensions W465 x H151 x D396 mm weight 13.8 kg
Beautiful item with original box Cybershaft ultra-high accuracy clock By supplying a high-precision clock to the device you are using, you can obtain high resolution and highly transparent sound quality that suppresses DAC sampling errors as much as possible. It can be used with audio devices that have an external 10MHz clock input. Serial N0214 (Fujisawa Yukishi)
Accessories: instruction manual, power cord, original box
Main specifications: output 10 MHz, 1 system, W110 x H68 x D212 mm, 1.5 kg
Officially imported from Sennheiser Japan. Comes with a case. The successor to the company's flagship model HD800. It is a model with few colorings and a flat sound similar to the HD800, but it is a model with a more focused sense of localization and strength added. There is a small dent near the plug insertion point (Mizusaki Ryo)
Maintenance information: 2025.12.24 sound output confirmed
Accessories: instruction manual, unbalanced cable, case ※ balance cable missing
Main specifications: dynamic open type 4 to 51,000 Hz (-10 dB) 300 ohms 102 dB 370 g
Sennheiser's high-spec current headphone amplifier. It has a built-in D/A converter and is compatible with DSD256 files and up to PCM384 kHz/32 bit (when connected to USB). You can enjoy the sharp and clear sound. The combination with the company's HD800S is the best match, so if you have one, don't miss it. There is a line scratch on the top plate on the exterior (Mizusaki Ryo)
Maintenance information: 2025.12.24 Operation confirmed
Accessories: power cable
Main specifications: Headphone amplifier, 3 digital inputs (USB, coaxial, S/PDIF optical), maximum output 480 mW (XLR-4/600Ω), dynamic range 115dB, 2 analog inputs (balanced, unbalanced), 1 analog output (balanced), 4 headphone outputs (Pentaconn 2, XLR-4:1, 6.3mmXLR3:1) compatible impedance 16 to 600 ohms W224 × H44×D306mm 2.25kg
A digital amplifier from the appendix of the 2014/1 issue of the audio magazine “Stereo.” Magazines are not included. It is in good condition with no feeling of use (Oikawa Tetsuji)
Maintenance information: 2025.12.14 Operation confirmed
Accessories: original box, power cable
Main specifications: 12W+12W W94 x H40 x D52 mm 74 g
The price has been drastically reduced. 2025/12/13 sales price 99,800 yen Sony 1TB HDD built-in audio player. You can enjoy not only high-resolution sound sources such as DSD 5.6 MHz or 192 kHz/24 bits, but also compressed sound sources with high sound quality. If you install the software on your PC or smartphone, you can transfer and operate music data to the HDD. You can see a feeling of use, such as appearance, dullness, small scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.11 Operation confirmed
Accessories: remote control, power cord
Main specifications: built-in HDD (1TB) playback compatible codec DSDIFF [DSD] /2.8 MHz/5.6 MHz) DSDIFF [DST] DSF/2.8 MHz/5.6 MHz) WAV/maximum 192 Hz/32 bit) AIFF/192 Hz/24 bit) FLAC/192 Hz/24 bit) ALAC/192 Hz/24 bit) ALAC/192 Hz/24 bit) WMA · MP3 · AAC · ATRAC (Non DRM) playback frequency characteristics 2Hz-80kHz audio output (XLR/RCA) EXT terminal (USB type A) W430 x H130 x D390 mm 14.5 kg