STM-72Denmark

This item has been sold.You can't purchase now. 25-48164-23864-00
STM-72
Manufacture:ortofon
Original price: JPY 13,000
Price: JPY 31,818 Sold Out
Step-up transformers
Denmark 1973 made
Arrival: 2025-11-23 19:29:21
description
MC boost transformer optimized for SPU. The sound creation that is only slightly distorted with a small transformer embodies superb music playback by connecting the SPU. You can see a feeling of use such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi) Maintenance information: 2025.11.22 Operation confirmed Accessories: none Main specifications: input impedance 2 ohms to 3 ohms boost ratio 60 times weight 70 g

ST-M25Denmark

This item has been sold.You can't purchase now. 25-48074-23029-00
ST-M25
Manufacture:ortofon
Original price: JPY 29,000
Price: JPY 31,636 Sold Out
Step-up transformers
Denmark 2009 made
Arrival: 2025-11-22 20:04:52
description
Mono dedicated step-up transformer. Excellent compatibility with orthophone CG25D mono MC cartridges. Due to the weak boost ratio of 12 dB, just the right volume can be obtained in the mm position. It is in good condition with no conspicuous scratches etc. (Asae Tomoho) Maintenance information: 2025.11.22 sound output confirmed Accessories: none Main specifications: boost ratio 12 dB input impedance 5 ohm to 50 ohm frequency characteristics 10 to 100 kHz recommended cartridge CA25D/CG25D/CA25DI/CG25DI W65 × H39 × D98 mm 410 g

T20MK2Denmark

This item has been sold.You can't purchase now. 25-48067-22967-00
T20MK2
Manufacture:ortofon
Original price: JPY 78,000
Price: JPY 27,091 Sold Out
Step-up transformers
Denmark 1989 made
Arrival: 2025-11-21 19:57:09
description
This step-up transformer is ideal for SPUs, etc. It is an MC transformer with excellent thickness and sense of energy, and fully brings out the characteristics of cartridges. (FUJISAWA KOSHI) Maintenance information: 2025.11.21 operation confirmed Accessories: No accessories Main specifications: input impedance 2 to 6 ohms boost ratio 28 dB load impedance 47 kΩ or more channel separation 80 dB (1 kHz) dimensions W80 x H40 x D128 mm weight 400 g

AN-S3Japan

This item has been sold.You can't purchase now. 25-48094-23197-00
AN-S3
Manufacture:AUDIO NOTE
Price: JPY 180,000 Sold Out
Step-up transformers
Japan
Arrival: 2025-11-15 19:32:36
description
A boost transformer from the era created by Mr. Kimiyasu Kondo, the founder of Audio Note himself. Please try the dynamic and delicate sound quality tuning delivered from a large transformer using silver wire, which is the company's signature technology. A feeling of use can be seen on the exterior, such as corrosion and rust on the plug, sticking marks, dullness, scuffs, etc. on the main body (Murakoshi Yoichi) Maintenance information: 2025.11.15 sound output confirmed Accessories: none Main specifications: PASS, 3, 2, 40 ohm switching W76 × H70 × D187 mm 807 g (actual measurement)

XF-1Japan

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XF-1
Manufacture:fidelity-reserch
Original price: JPY 68,000
Price: JPY 42,727 Sold Out
Step-up transformers
Japan 1981 made
Arrival: 2025-11-15 19:31:58
description
This is a boost transformer (Type L version) for FR low impedance MC cartridges. There is a sense of clarity, and the clean, straight sound is attractive. There are small wounds and dullness (Murakoshi Yoichi) Maintenance information: 2025.11.15 sound output confirmed Accessories: none Main specifications: input impedance 3 ohms or less, output impedance 47 to 50 kΩ, W158 x H60 x D120 mm, 2.1 kg

ET-100Japan

This item has been sold.You can't purchase now. 25-48094-23198-00
ET-100
Manufacture:entre
Original price: JPY 48,000
Price: JPY 40,909 Sold Out
Step-up transformers
Japan 1977 made
Arrival: 2025-11-15 19:31:53
description
An easy-to-use Antray boost transformer with 3 inputs and 3 impedance types selectable in addition to PASS. It is simple and carefully made, and has good balance and precise sound quality, so it can be lifted honestly and firmly. You can see a feeling of use such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi) Maintenance information: 2025.11.15 Operation confirmed Accessories: none Main specifications: primary impedance 3/10/40 ohm switching, bypass, 3 input systems, W130 x H70 x D186 mm, 2 kg

TH-7559UK

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TH-7559
Manufacture:PARTRIDGE
Original price: JPY 49,800
Price: JPY 72,545 Sold Out
Step-up transformers
UK 1979 made
Arrival: 2025-11-13 20:10:00
description
MC boost transformer using TH-7559 made by the famous British transformer manufacturer Partridge, low to high switchable. You can enjoy a clear, hard sound. Perfect for Denon's DL103 series and Orthophone MC series. There is dullness and a feeling of use. (FUJISAWA KOSHI) Maintenance information: 2025.11.13 Operation confirmed Accessories: No accessories Main specifications: 2 input systems, input impedance PASS/LOW/3Ω/HIGH/32Ω switching W150 × H100 × D125 mm dead weight 845 g

TR-MC1SEJapan

This item has been sold.You can't purchase now. 25-48058-22880-00
TR-MC1SE
Manufacture:TRIODE
Original price: JPY 100,000
Price: JPY 54,364 Sold Out
Step-up transformers
Japan 2009 made
Arrival: 2025-11-11 19:47:43
description
The highest quality super permalloy core is used to strongly amplify the small signals of low distortion ultra-low impedance cartridges. It excels at reproducing all kinds of sound fields with a sense of hole, scale, and reality, and achieves supple, cohesive playback unique to analog. There are scratches and some paint peeling. Serial 08110133 (Fujisawa Yukishi) Maintenance information: 2025.11.11 Operation confirmed Accessories: No accessories Main specifications: frequency characteristics 10Hz to 70kHz gain: low16dB/high22dB input load resistance 2Ω to 47Ω input terminal 2 systems gain switching: pass/low/high output terminal 1 system W180 ✕ d155 x H145 mm 2.5 kg

MCT100Japan

This item has been sold.You can't purchase now. 25-47998-22234-00
MCT100
Manufacture:MUSICA
Original price: JPY 69,000
Price: JPY 18,000 Sold Out
Step-up transformers
Japan
Shop: Osu shop
Arrival: 2025-11-12 20:11:18
description
MUSICA MC BOOST TRANSFORMER. You can enjoy clear, natural sound. Overall, there are injuries, abrasions, etc. (Oikawa Tetsuji) Maintenance information: 2025.11.12 Operation confirmed Accessories: none Main specifications: input impedance 15 ohms to 40 ohms, compatible size W220 x H70 x D80 mm, weight 1.2 kg

MARK2 TYPE LU.S.A

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MARK2 TYPE L
Manufacture:MA COTTER
Original price: JPY 260,000
Price: JPY 409,091 Sold Out
Step-up transformers
U.S.A 1979 made
Arrival: 2025-11-12 19:42:37
description
Comes with original box! The pinnacle of step-up transformers, the most popular MARK2 TYPE L among MA cotters. MC boost transformer for low impedance such as orthophones. Using a strong, sealed case and silver wire, the strong and fresh tone is attractive. Perfect compatibility with SPU etc. The transformer itself is different from P/PP/S. Officially imported by RF Enterprise. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi) Maintenance information: 2025.11.12 Operation confirmed Accessories: original box Main specifications: primary impedance 1 to 6 ohm silver wire triaxial output cable, adopted size W76 x H55 x D150 mm, approx. 1.3 kg

AU-300LCJapan

This item has been sold.You can't purchase now. 25-47978-22103-00
AU-300LC
Manufacture:DENON
Original price: JPY 20,000
Price: JPY 12,545 Sold Out
Step-up transformers
Japan 1986 made
Shop: Osu shop
Arrival: 2025-11-05 19:57:50
description
※Since there are noticeable scratches, it is inexpensive and is sold as is. The final model of the DENON step-up transformer using all LC-OFC lines. Small and affordable, yet clear sound with high S/N. It is a versatile type that is compatible with various cartridges from 3 to 40 ohms. Appearance, scratches, dullness, and feeling of use can be seen (Kobayashi Hitoshi) Maintenance information: 2025.11.3 sound output confirmed Accessories: none Main specifications: All LC-OFC lines used, LR independent permalloy double shield compatible cartridge impedance, 3 to 40 ohms, boost ratio 1:10, connection cord, 40 mm, frequency characteristics, 20 Hz to 50 kHz, W50 x H37 x D110 mm, 260 g

T-300Japan

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T-300
Manufacture:Phasemation
Original price: JPY 79,500
Price: JPY 31,818 Sold Out
Step-up transformers
Japan
Arrival: 2025-11-08 19:54:55
description
Phasemation MC boost transformer. It is the successor to the company's classic model T-3. It features a structure that thoroughly eliminates magnetic noise, and its smooth mid-high range with a high sense of SNR is attractive. The exterior is fine with no noticeable scratches, etc. (Murakoshi Yoichi) Maintenance information: 2025.11.7 sound output confirmed Accessories: instruction manual Main specifications: Compatible cartridge 1.5 to 40 ohms, boost ratio, 26 dB, frequency characteristics, 10 to 50 kHz, W136 x H88 x D128 mm, 1.2 kg

AU-320Japan

This item has been sold.You can't purchase now. 25-47902-21443-00
AU-320
Manufacture:DENON
Original price: JPY 19,800
Price: JPY 31,818 Sold Out
Step-up transformers
Japan 1973 made
Shop: Osu shop
Arrival: 2025-11-01 20:08:06
description
A classic MC boost transformer. With 2 input systems, the impedance can be switched between 3-40 ohms, and a PASS line is included, so you can freely enjoy various cartridges and tone arms. There is a feeling of use (Sasaki Shota) Maintenance information: 2025.11.1 operation confirmed Accessories: none Main specifications: MC boost transformer input 2 systems switchable, primary impedance 40 ohm, 3 ohm switching, secondary impedance 4 kΩ boost ratio 1:10 frequency characteristics 10 Hz to 100 kHz, W97 x H65 x D155 mm 0.8 kg

AU-300LCJapan

This item has been sold.You can't purchase now. 25-47926-21629-00
AU-300LC
Manufacture:DENON
Original price: JPY 20,000
Price: JPY 14,364 Sold Out
Step-up transformers
Japan 1986 made
Arrival: 2025-10-28 19:53:43
description
*Currently sold. The final model of the DENON step-up transformer using all LC-OFC lines. Small and affordable, yet clear sound with high S/N. It is a versatile type that is compatible with various cartridges from 3 to 40 ohms. Small scratches and abrasions can be seen. (FUJISAWA KOSHI) Maintenance information: 2025.10.28 Operation confirmed Accessories: No accessories Main specifications: All LC-OFC lines used, LR independent permalloy double shield compatible cartridge impedance, 3 to 40 ohms, boost ratio 1:10, connection cord, 40 mm, frequency characteristics, 20 Hz to 50 kHz, W50 x H37 x D110 mm, 260 g

STA6600Denmark

This item has been sold.You can't purchase now. 25-47701-19861-00
STA6600
Manufacture:ortofon
Original price: JPY 25,000
Price: JPY 81,636 Sold Out
Step-up transformers
Denmark
Shop: Osu shop
Arrival: 2025-10-14 19:39:43
description
The price has been drastically reduced. 2025/10/14 sales price 108,000 yen This MC boost transformer is ideal for SPUs using a No. 6600 JS transformer. The sharp high frequencies and the tenacious sound in the mid and low frequencies make the SPU sound even more energetic. There are dull stains. The exterior has small scratches, paint peeling, etc. (Oikawa Tetsuji) Maintenance information: 2025.10.14 Operation confirmed Accessories: none Main specifications: boost ratio 31 times with bypass function, primary impedance 1.5 ohm/secondary impedance 1.5 kΩ dimensions W90 x H68 x D88 mm weight 420 g

TH-7834UK

This item has been sold.You can't purchase now. 25-47796-20560-00
TH-7834
Manufacture:PARTRIDGE
Original price: JPY 128,000
Price: JPY 143,636 Sold Out
Step-up transformers
UK
Arrival: 2025-10-21 19:39:00
description
The price has been drastically reduced! 2025/10/21 sales price 178,000 yen The TH-7834, a Partridge step-up transformer that is rarely in stock, has arrived! It is a car that has deep carvings and expresses sound well. This is a nice coupling that gives sharpness to the rich appeal of the SPU. In addition to PASS/LO/HIGH switching, it is also a nice specification that it has 2 input systems. The exterior has peeling paint, dullness, and scratches (Satoshi Yonejima) Maintenance information: 2025.10.21 operation confirmed Accessories: No accessories Main specifications: 2 input systems, PASS/7.5/30 ohm switching, W150 x H108 x D130 mm, weight 1.7 kg

AU-340Japan

This item has been sold.You can't purchase now. 25-47779-20452-00
AU-340
Manufacture:DENON
Original price: JPY 46,000
Price: JPY 45,273 Sold Out
Step-up transformers
Japan 1978 made
Arrival: 2025-10-18 19:28:13
description
Denon boost transformer for MC cartridges. It has 3Ω/40Ω impedance switching, including PASS, and 2 input switches, making it a very convenient unit. A must have for those using DL-103 cartridges. There are stain marks and stains (Fujisawa Yukishi) Maintenance information: 2025.10.18 Operation confirmed Accessories: No accessories Main specifications: MC boost transformer boost ratio 1:10 (40 Ω) 1:33 (3 Ω) primary impedance 40 ohm 3 ohm/secondary impedance 4 kΩ frequency characteristics 10 Hz to 120 kHz W155 × H70 × D215 mm 2.1 kg

ST-7Denmark

This item has been sold.You can't purchase now. 25-47793-20536-00
ST-7
Manufacture:ortofon
Original price: JPY 34,000
Price: JPY 25,455 Sold Out
Step-up transformers
Denmark
Arrival: 2025-10-15 19:54:50

AU-310Japan

This item has been sold.You can't purchase now. 25-47727-20052-00
AU-310
Manufacture:DENON
Original price: JPY 14,000
Price: JPY 15,455 Sold Out
Step-up transformers
Japan 1976 made
Arrival: 2025-10-14 19:26:15
description
*Currently sold. DENON's MC type cartridge step-up transformer. Since it is equipped with a pass circuit, it is convenient when listening by exchanging 2 types of cartridges (MM type, MC type). Also, since it uses a transformer designed for the DL-103 and DL-103S, it fully demonstrates the capabilities of the models described above. Dullness and dirt can be seen over time. (FUJISAWA KOSHI) Maintenance information: 2025.10.14 Operation confirmed Accessories: No accessories Main specifications: primary impedance 40 ohms secondary impedance 4 kΩ boost ratio 1:10 frequency band 20 to 40 kHz W51 × H53 × D181 mm 0.65 kg

ST-90Denmark

This item has been sold.You can't purchase now. 25-47727-20046-00
ST-90
Manufacture:ortofon
Original price: JPY 99,000
Price: JPY 77,273 Sold Out
Step-up transformers
Denmark 2015 made
Arrival: 2025-10-13 19:56:43
description
Comes with original box! MC transformer compatible with orthophone balanced transmission. The transformer unit uses a high-performance permalloy with high permeability, and has wide range and flat frequency characteristics. It is also equipped with a perfectly balanced XLR terminal. The strong body and thick front panel pursue a sense of luxury in design, and the finish has good performance. The exterior is dull (Fujisawa Yukishi) Maintenance information: 2025.10.13 operation confirmed Accessories: instruction manual, original box Main specifications: Boost ratio 24 dB, compatible impedance 2 ohms to 60 ohms, body dimensions W165 x H115 x D119 (including terminals) mm dead weight 2.17 kg

TH-7559UK

This item has been sold.You can't purchase now. 25-47708-19906-00
TH-7559
Manufacture:PARTRIDGE
Original price: JPY 49,800
Price: JPY 72,545 Sold Out
Step-up transformers
UK 1979 made
Arrival: 2025-10-06 19:35:56
description
MC boost transformer using TH-7559 made by the famous British transformer manufacturer Partridge, low to high switchable. You can enjoy a clear, hard sound. Perfect for Denon's DL103 series and Orthophone MC series. The appearance is fine, with no noticeable scratches, etc. (Kobayashi Hitoshi) Maintenance information: 2025.10.6 operation confirmed Accessories: original box Main specifications: 2 input systems, input impedance pass/low, 3 ohm/high, 32 ohm switching size measurement W150 x H99 x D113 mm weight measurement 845 g

SPU-T1Denmark

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SPU-T1
Manufacture:ortofon
Original price: JPY 150,000
Price: JPY 81,636 Sold Out
Step-up transformers
Denmark 1993 made
Arrival: 2025-09-15 20:01:15
description
The disposal price has been reduced! Member prices are not applicable. 2025/9/15 sales price 118,000 yen 1990s orthophone SPU boost transformer. 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. The exterior has a feeling of use such as dullness. (FUJISAWA KOSHI) Maintenance information: 2025.9.15 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

STA-202JJapan

This item has been sold.You can't purchase now. 25-47475-18224-00
STA-202J
Manufacture:Audionix
Price: JPY 27,091 Sold Out
Step-up transformers
Japan
Shop: Osu shop
Arrival: 2025-09-27 20:10:11
description
Maintained. A slightly rare Audionics MC transformer. It has a thick, mellow tone, and an appeal that is a bit different from modern models. It seems to be compatible with SL15, MC10, MC20, etc. from the 1960s and 70s. The label on the back is missing (Oikawa Tetsuji) Maintenance information: 2025.9.27 Maintained (PASS/ON changeover switch contact cleaning) Accessories: none Main specifications: 35 dB gain, suitable primary side impedance 1.5 to 30 ohms

AU-320Japan

This item has been sold.You can't purchase now. 25-47576-18966-00
AU-320
Manufacture:DENON
Original price: JPY 19,800
Price: JPY 31,818 Sold Out
Step-up transformers
Japan 1973 made
Arrival: 2025-09-26 19:45:37
description
A classic MC boost transformer. With 2 input systems, the impedance can be switched between 3-40 ohms, and a PASS line is included, so you can freely enjoy various cartridges and tone arms. The exterior is dull. (FUJISAWA KOSHI) Maintenance information: 2025.9.26 operation confirmed Accessories: No accessories Main specifications: MC boost transformer input 2 systems switchable, primary impedance 40 ohm, 3 ohm switching, secondary impedance 4 kΩ boost ratio 1:10 frequency characteristics 10 Hz to 100 kHz, W97 x H65 x D155 mm 0.8 kg

ST-M25Denmark

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ST-M25
Manufacture:ortofon
Original price: JPY 29,000
Price: JPY 29,091 Sold Out
Step-up transformers
Denmark 2009 made
Arrival: 2025-09-20 19:56:18
description
Mono dedicated step-up transformer. Excellent compatibility with orthophone CG25D mono MC cartridges. Due to the weak boost ratio of 12 dB, just the right volume can be obtained in the mm position. It is in good condition with no conspicuous scratches etc. (Asae Tomoho) Maintenance information: 2025.9.20 sound output confirmed Accessories: original box Main specifications: boost ratio 12 dB input impedance 5 ohm to 50 ohm frequency characteristics 10 to 100 kHz recommended cartridge CA25D/CG25D/CA25DI/CG25DI W65 × H39 × D98 mm 410 g

15095AU.S.A

This item has been sold.You can't purchase now. 25-47468-18173-00
15095A
Manufacture:ALTEC
Price: JPY 45,273 Sold Out
Step-up transformers
U.S.A
Shop: Osu shop
Arrival: 2025-09-15 19:54:49
description
An Altech matching transformer is cased to create a step-up transformer with a boost ratio of 10 times. The high frequencies are spoiled, but the sense of energy in the mid and low frequencies is outstanding. Perfect for old jazz. There is dust and dirt (Oikawa Tetsuji) Maintenance information: 2025.9.14 Operation confirmed Accessories: none Main specifications: load impedance in 150 ohm, out15 kΩ size W122 x D80 x 95 mm approx. 500 g (actual measurement)

HA-T10Japan

This item has been sold.You can't purchase now. 25-47376-17444-00
HA-T10
Manufacture:SONY
Price: JPY 16,364(pair)Sold Out
Step-up transformers
Japan
Arrival: 2025-09-02 19:51:41
description
*Currently sold. Popular connector-type MC step-up transformer. It uses an ultra-compact double voice coil, and although it is small, it boosts the voltage well. A powerful machine that lets you hear realistic sounds. It can be used for a wide range of purposes, from SPUs to MC cartridges such as DL-103. In addition to the exterior and bald paint, you can see a feeling of use such as dullness, abrasions, etc. (Kobayashi Hitoshi) Maintenance information: 2025.8.31 Operation confirmed Accessories: none Main specifications: boost ratio 26 dB, adaptive impedance, 3 to 40 ohms, frequency characteristics, 20 Hz to 30 kHz, W13 x H13 x D55 mm, 20.8 g

SH-305MCJapan

This item has been sold.You can't purchase now. 25-47335-17225-00
SH-305MC
Manufacture:Technics
Original price: JPY 65,000
Price: JPY 90,727 Sold Out
Step-up transformers
Japan 1981 made
Shop: Osu shop
Arrival: 2025-08-27 19:54:25
description
It is a beautiful item with the original box and no noticeable scratches! MC boost transformer using an amorphous troidal core transformer. The sound quality is so smooth and amazing that you can't imagine from its size. Impedance is switched in 4 levels, including PASS, and is compatible with various cartridges (Daiki Goto) Maintenance information: 2025.8.27 continuity confirmed Accessories: manual, connection cable, original box Main specifications: Pass (when using MM cartridges), Low 3Ω, Middle 15Ω, High 30Ω switching W60 x H90 x D210 mm weight 4.5 kg

HA-5Japan

This item has been sold.You can't purchase now. 25-47192-16164-00
HA-5
Manufacture:YAMAHA
Original price: JPY 8,000
Price: JPY 5,182 Sold Out
Step-up transformers
Japan
Arrival: 2025-08-16 19:28:28
description
The price has been reduced. 2025/8/16 sales price 6,000 yen. *Currently sold. A long-selling model of phono equalizer for MM type cartridges. You can feel the thickness of the sound for the price, probably because of the good old design. You can see a feeling of use such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi) Maintenance information: 2025.8.12 Operation confirmed Accessories: none Main specifications: rated input 2.5 mV (1 kHz) rated output 150 mV (1 kHz) power consumption 0.6 W W73 × H62 × D162 mm weight 640 g

AU-320Japan

This item has been sold.You can't purchase now. 25-47201-16184-00
AU-320
Manufacture:DENON
Original price: JPY 19,800
Price: JPY 31,818 Sold Out
Step-up transformers
Japan 1971 made
Arrival: 2025-08-13 18:53:45
description
A classic MC boost transformer. With 2 input systems, the impedance can be switched between 3-40 ohms, and a PASS line is included, so you can freely enjoy various cartridges and tone arms. There are a few stains, scratches, dirt, etc. on the top surface throughout (Murakoshi Yoichi) Maintenance information: 2025.8.10 sound output confirmed Accessories: none Main specifications: MC boost transformer input 2 systems switchable, primary impedance 40 ohm, 3 ohm switching, secondary impedance 4 kΩ boost ratio 1:10 frequency characteristics 10 Hz to 100 kHz, W97 x H65 x D155 mm 0.8 kg
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