Pair Tube Bi-triode Power Tube Made in USA JAN Measurement Value 60/60 (Rejection Value 40) With Original Box ※ The pair is judged based on GM value measured on the tv-7 test machine (Yosuke Kojima)
Accessories: original box
Pair Tube Bi-triode Power Tube Made in USA JAN Measurement Value 60/60 (Rejection Value 40) With Original Box ※ The pair is judged based on GM value measured on the tv-7 test machine (Yosuke Kojima)
Accessories: original box
Pair Tube Bi-triode Power Tube Made in USA JAN Measurement Value 60/60 (Rejection Value 40) With Original Box ※ The pair is judged based on GM value measured on the tv-7 test machine (Yosuke Kojima)
Accessories: original box
※One piece only. Details unknown, this is an ALTEC 604 or ALTEC 1 inch driver diaphragm. It seems to be an inexpensive interchangeable product (Daiki Goto)
Accessories: none
※It is inexpensive because the urethane coating has deteriorated. Maintained. The 606 is thick and unimaginable from its compact exterior. The good sound unique to QUAD allows you to enjoy not only classical music, but also jazz vocals in a mild way. The high level of musicality that makes you enjoy the music with a pleasant tone stands out. Exterior and paint deterioration are conspicuous, and a feeling of use such as dullness, abrasions, etc. can be seen (Kobayashi Hitoshi)
Maintenance information: 2024.6.28 maintenance (power stage/driver stage TR check → OK, DC INPUT bypass C gain setting C replacement, other C/R checks, operation tests)
Accessories: power cord, instruction manual (copy)
Main specifications: output 140W+140W (8Ω) W321×H140×D238mm 12kg
The price has been reduced. 2024/5/23 sales price 79,800 yen Maintained in 2015. The 606 is thick and unimaginable from its compact exterior. The good sound unique to QUAD allows you to enjoy not only classical music, but also jazz vocals in a mild way. The high level of musicality that makes you enjoy the music with a pleasant tone stands out. There is deterioration in exterior paint (Murakoshi Yoichi)
Maintenance information: 2015.9.12 maintenance completed (internal power transfer → malt plane deterioration → dismantling and reinstallation, exchange of both channel in-board bypass C, gain setting C, etc., TR check → OK, operation inspection check)
Accessories: power cord
Main specifications: output 140W+140W (8Ω) W321×H140×D238mm 12kg
Maintained. The 606 is thick and unimaginable from its compact exterior. The good sound unique to QUAD allows you to enjoy not only classical music, but also jazz vocals in a mild way. The high level of musicality that makes you enjoy the music with a pleasant tone stands out. Exterior and paint deterioration are conspicuous, and a feeling of use such as dullness, abrasions, etc. can be seen (Kobayashi Hitoshi)
Maintenance information: 2024.6.30 Maintained (DC INPUT bypass C gain setting C replacement in L/R block, power stage TR/drive stage TRall check OK, operation check)
Accessories: power cord, instruction manual
Main specifications: output 140W+140W (8Ω) W321×H140×D238mm 12kg
The price has been reduced. 2024/5/19 sales price 54,800 yen ※Currently sold. JBL/UREI professional power amplifier Dynamic sound with clear contours and momentum. The driving power that makes it easy to drive even large speakers at a high volume is attractive. It can also be used as mono power by connecting to a bridge. There are conspicuous abrasions on the exterior and top plate, and a feeling of use such as dullness and scratches can be seen (Kobayashi Hitoshi)
Maintenance information: 2024.5.19 Operation confirmed
Accessories: none
Main specifications: 150W+150W (8Ω) 300W+300W (4Ω) input 2 systems (phone/XLR) W483 x H180 x D260 mm approx. 20 kg
Pair tube triode metal base, made in America, original with box ※ The pair was determined based on the EM value measured by the SENCORE TC-162 tester (Kojima Yosuke)
Accessories: original box
Pair tube, triode, metal base, made in America, with original box*Pairs are determined based on EM values measured by the SENCORE TC-162 testing machine (Kojima Yosuke)
Accessories: original box
Pair tube metal brown base Russian dharma tube measured value 60/58 (rejected value 44) with white box, printing on one side often disappears ※Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube, metal, brown base, made in America, measured value 66/64 (rejected value 44) with original box (some written), sticker is attached to the base part, and there is a getter burn ※ The pair was determined based on the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube KT88 compatible ball American metal base measurement value 58/52 (rejection value 44) There is getter burn and loss on one side, and there is dullness on the base on the other side ※The pair is judged based on the gM value measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: none
Pair tube KT88 compatible sphere Russian metal brown base measurement value 50/50 (rejection theory 44) there is writing on the base with the blue box ※The pair is determined based on the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: blue box
The price has been reduced. 2024/2/14 sales price 99,800 yen Maintenance completed! A preamplifier that can be operated by a full remote control. A familiar quad tone that is natural, easy to listen to and won't get tired of. In addition to volume, left and right balance, input switching, etc., it is fully equipped with functions such as TILT (loudness like function), high pass, low pass filter (2 levels each), etc. (Oikawa Tetsuji)
Maintenance information: 2024.1.16 Maintained (NG diode disconnected due to fuse in the main unit → short circuit in the remote control wired cord connector section → replacement, operation check)
Accessories: remote control, power cable
Main specifications: full remote control control amplifier with PHONO input (mm) W321 x H80 x D255 mm 3.3 kg
The disposal price has been reduced! (Member discounts are not applicable) 2023/11/11 sales price 99,800 yen Maintained! A preamplifier that can be operated by a full remote control. A familiar quad tone that is natural, easy to listen to and won't get tired of. In addition to volume, left and right balance, input switching, etc., it is fully equipped with functions such as TILT (loudness like function) and high pass and low pass filters (2 levels each), which is convenient. The exterior has peeling paint and repair marks on the bottom. Serial Q 202547 (Tamura Eiji)
Maintenance information: Maintained on 2015.2.23 (reworking the solder on the printed circuit board pattern on the power switch part of the amplifier body. Electrolytic capacitor replacement in the main unit. The CD/PLAY button installation on the remote control has been reworked. Remodeling the remote control emitting diode mounting position. aging test. (Check the operating distance range of the remote control → around 5m)
Accessories: remote control, power cable
Main specifications: full remote control control amplifier with PHONO input W321 x H80 x D255 mm 3.3 kg
※1 bottle only. The RCA cable uses a 0.6 m 6N-7N hybrid conductor and twin core structure. The cable is thick and powerful in the mid-range, making it a great cable for vintage audio. There is slight dullness on the plug part (Murakoshi Yoichi)
Maintenance information: 2023.7.20 Continuity confirmed
Accessories: none
RCA cable, 1.0 m pair, 6N-7N hybrid conductor, twin core structure, thick and strong midrange, this hidden name cable is recommended for vintage audio. There are some stains and disappearing characters (Tamura Eiji)
Maintenance information: 2021.2.3 continuity confirmed
Accessories: No accessories
Speaker cable with 2.4 m pair end unprocessed ultra-high purity 7nCu/6NCU hybrid multi-conductor cable achieves excellent cost performance unrivaled. All materials and configurations, such as insulators, coatings, and inclusions, are the same as 7N and 7.8N cables, and it is a product with outstanding content density. You can see the exterior, dullness, threads, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2024.6.18 Continuity confirmed
Accessories: none
The price has been reduced. 2024/2/20 sales price 49,800 yen 2-way bookshelf speaker system. It's the most compact speaker in the company's 600 series, yet it's second to none in terms of power and accuracy due to the new separate double dome tweeter and design improvements. It is in good condition (Sasaki Shota)
Maintenance information: 2024.2.20 sweep test good
Accessories: none
Main specifications: playback frequency 54 Hz to 50 kHz efficiency 85 dB impedance 8 ohm crossover 4 kHz dimensions W160 x H315 x D229 mm weight 4.6 kg
Pair tube direct heat triode tube American-made smoke measurement value 68/68 (rejection value 38) with white box (lid claws are missing) *Pairs are determined based on gM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube direct heat triode tube American-made smoke measurement value 72/70 (rejection value 38) with white box (lid claws are missing) *Pairs are determined based on gM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube, EL84 compatible ball, pentode tube, made in Japan, measured value 84/80 (rejection value 50), both tubes have pin bends ※ pairs are determined based on GM values measured with test machine TV-7 (Kojima Yosuke)
Accessories: none
※Set of 2 (both tubes are not treated as a pair since their structures are very different), deflection output tubes, made in America, measured value 66/64 (rejection value 38), with original box (box lid is missing) *Measured values indicate GM values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: original box
Sold 1 bottle EL34 compatible ball, made in Japan, black plate, measured value 52 (rejected value 30) with original box, there is a slight getter burn ※ pairs are judged based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
It is an EL34 compatible ball Mullard print sold in 1 bottle, but it seems to be made by RFT due to the structure. Measured value 48 (rejected value 30) with original box ※ measured values indicate GM values measured with the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube, EL34 compatible ball, Russian tube, measured value 44/42 (rejected value 30) with original box ※ pair is determined based on GM values measured with test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube triode for Hi-Fi made in Japan*Pairs are determined based on EM values measured with the test machine EM-604 (Yosuke Kojima)
Accessories: none
Pair tube, large beam output tube, 8147 compatible bulb, gray plate for Hi-Fi, with original box (outer box/inner box), has slightly decreased getter for both tubes ※ The pair measures and determines EM values with the measuring machine TC-162 (Kojima Yosuke)
Accessories: original box
Pair tube, deflection output tube, made in America, with original box ※Pairs are determined based on EM values measured with the TC-162 tester (Kojima Yosuke)
Accessories: original box
1 bottle of side-heat beam tube, made in France, smoke measurement value 42 (rejection value 25), replacement box included, printing is missing ※ the measured value shows the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Pair tube ambient heat beam tube measurement value 44/42 (rejection value 25) with original box*Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube ambient heat beam tube measurement value 40/38 (rejection value 25) with original box*Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube, ambient heat beam tube, 5881 equivalent tube, made in America, JAN brown base measurement value 42/42 (rejected value 25) with white box ※Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Set of 2 (the internal shape seems to be the same, but the manufacturer country print is different (made in Canada/USA), so they are not treated as a pair), brown base measurement value 44/42 (rejected value 25), getta burns, and decreases) *Measured values indicate GM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube, ambient heat beam tube, made in America, JAN measurement value 42/40 (rejected value 25) with white box ※Pairs are determined based on GM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube Russian lot: 0202/0107 measured value 36/36 (rejected value 25) with original box*Pairs are judged based on gM values measured by testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube VT-115 equivalent tube, high durability tube, metal tube, tea base, measured value 46/44 (rejected value 25) with white box ※Pairs are determined based on GM values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: white box
Pair tube VT-115 equivalent tube, high durability tube, metal tube, tea base, measured value 48/46 (rejected value 25) with white box ※Pairs are determined based on GM values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: white box
Power cable, 0.4 m, no terminals, 6nCu+OFC new hybrid 2-core conductor Although it is the company's entry model, it is a power cable with low noise, stable sound, and high C/P (Kanai Hidetsugu)
Maintenance information: 2023.12.9 Continuity confirmed
Accessories: none
Balance cable 1.0m pair stress-free 6N conductors Sound quality that is thicker than AcroLink and has a natural texture that shines with good balance. It is a character that is compatible with a wide range of devices. In addition to cracks in the exterior and plug, dullness and a feeling of use can be seen (Kobayashi Hitoshi)
Maintenance information: 2024.5.12 continuity confirmed
Accessories: none
RCA cable 1.0 m pair 6NCU (99.9999% pure copper), PCOCC, pure silver coated HIGHER-OFC, high-purity oxygen-free copper are characters that are easy to listen to with just the right amount of delicacy and volume. (FUJISAWA KOSHI)
Maintenance information: 2024.7.2 continuity confirmed
Accessories: No accessories
The 1.3 m power cable uses a polymer polyolefin material for the untreated terminal sheath. The thickness, which can be called overspec, ensures high speed and large current capacity. You can see the exterior, dullness, threads, etc. and a feeling of use (Kobayashi Hitoshi)
Maintenance information: 2024.4.19 Continuity confirmed (PSE certified product)
Accessories: none
Power cable 1.8 m PSE standard product, 4 types of hybrid original conductor+3 core structure, this is a long-selling cable that reproduces an expansive sound field, medium to high range with good coverage, and a wide range (Kanai Hidetsugu)
Maintenance information: 2024.6.24 continuity confirmed
Accessories: none
Speaker cable uses a 1.5m pair of untreated 6N high-purity copper thick aluminum wrap shields, and is a speaker cable with an excellent balance between the warmth of the sound of 6N copper and elongation in the high frequency range due to the silver coating. There is a slight stickiness. (FUJISAWA KOSHI)
Maintenance information: 2024.7.2 continuity confirmed
Accessories: No accessories
Only 1 speaker cable uses a new conductor by hybridizing 4 types of materials, including the innovative HiFC and PCUHD wire materials, with an exquisite golden ratio, centering on an untreated ultra-high purity 6NCU at the end. It's a clear high range, a plump middle range, and a heavy low range. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2024.5.5 continuity confirmed
Accessories: none
Only 1 speaker cable uses a new conductor that is a hybrid of 4 types of materials, including the innovative HiFC and PCUHD wire materials, with an exquisite golden ratio, centering on an untreated ultra-high purity 6NCU at the end of the 1.35 m end. It's a clear high range, a plump middle range, and a heavy low range. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2024.5.5 continuity confirmed
Accessories: none
This model uses 4 types of wire, mainly untreated high-purity 6N copper at the 2.5 m end of the speaker cable. Of course, with the starcard system, where 2 of the 4 cores are twisted and connected to each other, it is also possible to use each of the 4 cores as bi-wiring by dividing them into high and low frequencies (Murakoshi Yoichi)
Maintenance information: 2024.6.27 continuity confirmed
Accessories: none
Phono cable uses a conductor that is a hybrid of high-purity oxygen-free copper, centering on 1.5m RCA-RCA specification ultra-high purity 6N copper. It is a model that incorporates various technologies in order to eliminate the ultra-fine low output power loss of MC cartridges as much as possible. (FUJISAWA KOSHI)
Maintenance information: 2024.7.2 continuity confirmed
Accessories: No accessories
Pair tube double triode tube, made in America, JAN measurement value 74/72 (rejected value 32) *Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box