ZAIKA 300B single mono power amplifier. While increasing bandwidth, it has musical distortion characteristics centered around 300B's unique secondary distortion, and can be enjoyed regardless of genre with tuning that maximizes 300B likeness. The vocals are particularly good. The appearance is fine, with no noticeable scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.12.6 operation confirmed
Accessories: none
Main specifications: 300B x 2 5U3C x 2 310A x 2 W230 x H210 x D400 mm 13.5 kg (actual measurement)
Comes with original box! Comes with a genuine dedicated stand HSS-7C. You can enjoy the smooth, beautiful sound unique to British BBC monitors. As expected, there is plenty of noise regardless of genre, from jazz and classical music to rock and pop music. It captivates with just the right amount of box noise and a design where there are guests. The exterior is beautiful with no conspicuous scratches (Mizusaki Ryo)
Maintenance information: 2025.12.3 sound output confirmed
Accessories: special stand, original box
Main specifications: 2-way 2-speaker bass reflex system unit, 20 cm cone type for low range, 2.5 cm dome type playback frequency band 43 Hz to 20 kHz output sound pressure level 86 dB impedance 8 Ω maximum input 150 W W271 x H520 x D315 mm 12.5 kg
It features clear, tight bass and a clear treble range, so you can enjoy it regardless of genre without any habit. Also, since it sounds well even with an amplifier without power, it is a highly versatile speaker. The appearance is fine, with no noticeable scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.11.30 Operation confirmed
Accessories: instruction manual, original box, saran net
Main specifications: 2 way 2 speakers playback frequency range 39Hz-50kHz 86dB impedance 4Ω crossover 3000 Hz W190 × H359 × D354 mm 8.7 kg
The price has been reduced. 2025/11/15 sales price 29,800 yen The woofer edge has been softened and the original bass sound has been revived! A moderately sized 3-way speaker. It is a model that has high cost performance and sounds regardless of genre. It is also recommended as an introduction to audio. As for the condition, there is a feeling of use such as wear and tear over time, and the saran net frame seems to have deteriorated slightly, and oxidation can be seen on the unit frame. Serial 24569/24620 (Yamato Yuki)
Maintenance information: 2025.11.15 Maintained (woofer edge softening treatment exterior simple cleaning operation confirmed)
Accessories: saran net
Main specifications: 3 way, 3 speakers, sealed system, bookshelf type, 6 ohm playback frequency band 30 Hz to 30 kHz level control/4 mid-range positions (600 Hz to 5 kHz), high range 4 positions (5 kHz to 30 kHz), W370 x H680 x D380 mm 24 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/11/10 sales price 49,800 yen This is a traditional Pioneer vertical twin speaker. The sound quality is coherent and tense. It comes out well, and has good low frequency response, so it sounds light. It is a speaker that can be enjoyed regardless of the genre of music. As for the exterior, there is a slight crease at the bottom. Serial 01036, 01053 (Fujisawa Yukishi)
Maintenance information: 2025.11.10 Operation confirmed
Accessories: saran net, jumper plate
Main specifications: 2-way, 3-speaker bass reflex system, tall boy type, anti-magnetic design, 6 ohms, maximum input, 180 W, W268 x H960 x D377 mm, 35.5 kg
Both the interior and exterior have been refreshed and maintained in 2023/6! ATT has been disassembled and cleaned again. The original 4343 by All Alnico, the original 4343 of 4343! The crisp low frequencies and punchy high frequencies are unbearable, and popularity continues unabated even now. The dynamic sound typical of JBL has been revived due to maintenance. It is a famous monitor that can best reproduce the sound source of on-microphone recordings regardless of age or genre (Tomonori Asae)
Maintenance information: 2025.11.22 maintained (ATT disassembly and cleaning, unit removal) 2023.6.1 maintained (exterior gray paint front and rear baffle paint exterior repair plate cleaning gloss adjustment paint horn paint diffuser cleaning/receiving part velcro replacement saran frame painting/magic tape replacement/net replacement, plate pin repair woofer maintenance (edge replacement, corn paper coating, Frame polish) Mid maintenance (edge replacement, cone paper coating, frame polish) driver maintenance (magnetic circuit gap cleaning/center adjustment, sound absorbing material replacement, screw replacement, terminal etc. Contact cleaning) Tweeter maintenance (magnetic circuit gap cleaning/center adjustment, terminal etc. Contact cleaning, exterior paint) Unit detachable terminal rust removal acid wash cleaning, insulation bush & mounting screw replacement ATT brand new Replacement INT/EXT switching SW contact cleaning. A frequency characteristic measurement check (~ 42 kHz) is performed, and the original capacitor is continuously used for good results, input/output waveform and balance confirmation sound output check)
Accessories: saran net diffuser
Main specifications: 4-way 4-speaker bass reflex type 2405/2420/2121/2231A crossover 300Hz/1250Hz/9500Hz 8Ω 93dB W635 x H1,051 x D435 mm 83.9 kg/book
Maintained. 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. (Kanai Hidetsugu)
Maintenance information: 2025.11.17 Maintained (panel switch and volume class disassembly contact polishing. I/O pin jack polish. Soldering correction for each circuit board)
Accessories: none
Main specifications: 105W+105W (8Ω) 125W+125W (6Ω) W434 × H139 × D414 mm 10.6 kg
Maintained. The mid-size α series uses an α-X balance circuit that prevents the effects of noise and distortion from the ground. The smooth, stretchy sound quality is attractive. Designed with CD playback in mind, the sound separation is good, and it is a classic premain that will keep you entertained regardless of genre. Overall, there is a feeling of use such as dullness. Serial 438045069 (Mizushima Itsuro)
Maintenance information: 2025.11.11 maintenance completed (main volume dismantling, cleaning, and fixing, switch disassembly and polishing (reckout tone subsonic muting, loudness source direct processor, MM/MC), output relay replacement, power amplifier transistor replacement, capacitor installation, other volume switch cleaning, interior and exterior inspection and cleaning, pin jack polishing, operation confirmation)
Accessories: copy of instruction manual
Main specifications: 90W+90W (8Ω) W448 x H160 x D441 mm 16.0 kg
The price has been reduced. 2025.11.3 sales price 39,800 yen The woofer has been softened. The successor to the 77 series, which was all the rage in the 1980s. It has an excellent range balance typical of Diatone, and is a versatile type that can be enjoyed regardless of preferences. The overall sound quality gives a tight impression, and it plays music with tight low frequencies and clear mid to high frequencies. There are dents on the grill, small scratches, dirt, and dullness throughout, and undulations on the top plate (Oikawa Tetsuji)
Maintenance Information: 2025.11.3 woofer softening treatment
Accessories: none
Main specifications: 3 way 3 speakers anti-magnetic design impedance 6Ω W400×H700×D330 mm 29.0 kg
*Currently sold. A bookshelf that uses a honeycomb flat unit. It doesn't have strange habits like Technics, and it sounds in an honest way, and it seems to make a sound regardless of genre. There is a dent in the saran net, there are footprints on the top plate, and there are places where the speaker terminal button does not return well (Oikawa Tetsuji)
Maintenance information: 2025.11.5 operation confirmed
Accessories: none
Main specifications: 8Ω 89dB W223 × H372 × D207 mm 6 kg
This model was the first to use an ALPHA processor in the best-selling 1650 series. The mid and low frequencies are quite stable, and the balance depicts rich, rich music regardless of genre. Stains are conspicuous on the exterior and front panel, and a feeling of use can be seen throughout, such as dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.5.31 Operation confirmed
Accessories: remote control
Main specifications: Real 20-bit 4DAC/Lambda Super Linear Converter with 20-bit 8x oversampling digital filter+GIC 3rd order analog filter frequency characteristics 2Hz to 20kHz W434 x H120 x D340 mm 10.2 kg
*Currently sold. Remote control is missing. It has a high signal-to-noise ratio and low THD value, and you can enjoy clear sound quality with little noise regardless of genre. In addition to paint peeling on the exterior and inside of the tray, you can see a feeling of use such as dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.9.16 Operation confirmed
Accessories: power cable
Main specifications: frequency characteristics 2 Hz to 20 kHz dynamic range 100 dB or more (EIAJ) S/N ratio 120 dB or more (EIAJ) headphone output level maximum 15 mw/32 Ω (variable) dimensions W430 x H114 x D290 mm weight 4.0 kg