The price has been reduced. 2025/12/10 sales price 698,000 yen Maintained! Genuine Stellar GOLDMUND Millennium Evolution preamp. It is a luscious, elegant amplifier with a sexy tone unique to Goldmund. A carbon top has been adopted to improve the signal-to-noise ratio, and the use of an A20 module eliminates minute vibrations and fluctuations on the circuit. There is slight rust on the front plate. Serial 40308038 (Daiki Goto)
Maintenance information: 2025.12.10 Maintained (the noisy Rch A20 amplifier module was replaced and the remote control battery was replaced. After the repair, operation, various characteristics were confirmed, running tests, and interior and exterior cleaning were carried out.)
Accessories: remote control, copy of manual, power cable
Main Specifications: Analog Input: Single Ended (RCA) x 7 Analog Output: Single Ended (RCA) x 2 Analog Tape Out Single End (RCA) x 2 Input Sensitivity/Impedance: 100mV/50kΩ Output Level/Impedance: 1.55Vrms/10Ω Frequency Characteristics: 0 to 150 kHz ± 0.1 dB 0 to 500 kHz ± 1 dB 0 to 0.85 MHz ± 3 dB Total Harmonic Distortion Ratio: 0.01% Below channel separation: 90 dB or more Maximum power consumption: 70 W W440 x D400 x H105 mm 10 kg
The disposal price has been reduced. Member prices are not applicable. 2025/12/3 sales price 238,000 yen ※There is PHONO notation, but the BNC input is a line-only type equipped with an NA328/2 module. Maintenance has been completed, including replacing 35 capacitors and creating an input cable! This is a pre-+ power amplifier set. Although it is small, it has high gain, and it lets you hear deep, English-like sounds. With a very sticky middle range and strong driving power, not only small groups but also large groups can make a loud noise. There are dirt and threads on the exterior. *There is some pop noise when the power is turned on and off, or when the preamp is unmuted, but this is a specification. There is overall dullness and small scratches (Mizusaki Ryo)
Maintenance information: 2025.11.9 maintained (NAP140 voltage failure → C deterioration in tantalum C short board replacement NAC62 board C capacity failure → replacement each SWVOL galley → cleaning (DIN5P → RCA male 1m cable x 2 created) operation check)
Accessories: power cable, connection cable, copy of instruction manual
Main specifications: NAC62 · input phono BNC (RCA) x 1 line DIN terminal x 3 systems W250 x H76 x D300 mm weight 2.5 kg NAP 140 · output 45 x 45 W (8 ohms) W205 x H76 x D300 mm weight approx. 5 kg
The price has been reduced. 2025/12/12 sales price 18,000 yen. The marble board has a mirror finish on the entire surface. It is also beveled and has a nice finish. If you place it underneath tall boy speakers that have become mainstream in recent years, it's full of style. Use it for amplifiers, CD players, etc. External line wounds and square chips can be seen (Murakoshi Yoichi)
Accessories: none
Main specifications: 400 x 40 x 600 mm 24 kg/1 sheet
The price has been reduced! 2025/12/19 sales price 598,000 yen Panel maintenance including fog removal! Modern vacuum tube premain amplifier. Vacuum tubes are used at all stages. The soft, glossy vocals are attractive. While firmly following the thickness and softness of traditional A sound images, it is also well compatible with modern sound sources. The plug ground part of the power cable has been cut off. The exterior is dull. Serial XB1421 (Jun Tamai)
Maintenance information: 2025.12.19 maintained (each SW, VOL cleaning (some remains due to scratches on the balanced rough contact plate) panel dismantling cleaning tube defective replacement input selector, push button LED replacement (original not available) pin jack cleaning operation check bonnet screw replacement)
Accessories: ※ Remote control is being arranged power cable (the ground part of the plug has been cut off.)
Main specifications: 75W+75W (2/4/8Ω) input RCA x 6 systems (internal phono MM/AUX switching x 1 system) XLR x 1 system power input RCA x 1 system W445 x H255 x D475 mm 35.8 kg
The disposal price has been reduced! Member prices are not applicable. 2025/12/16 sales price 1,180,000 yen Exterior cleaning, unit gap cleaning, etc. have been overhauled! Officially imported by TEAC. Genuine TEAC autograph equipped with a TANNOY K3808 unit. The Shinkosha enclosure, which was manufactured with a license from the home country of England, was particularly appreciated for its good sound, and is characterized by a rich sound field reproduction that sounds loud like an autograph. The core K3808 coaxial 2-way unit is designed based on the famous monitor Gold and uses a gathered hard edge with good response. Coupled with the clear and sharp mid-high range, it creates a firm and majestic mid to low range. Serial 001568/001574 (Yonejima Satoshi)
Maintenance information: 2025.12.16 Maintained (unit maintenance: low range side edge softening treatment/magnetic circuit gap cleaning/center adjustment, high frequency side magnetic circuit gap cleaning center adjustment. Network maintenance: frequency characteristics check, ATT cleaning, faston terminal replacement, terminal cleaning. Exterior cleaning/simple repairs. Saran net cleaning/repasting, frame repair)
Accessories: saran net
Main specifications: 2-way, 1 speaker, all-horn system, corner type, 2-way unit (K3808), frequency characteristics, 50 Hz to 20,000 Hz, nominal impedance, 8 ohms, output sound pressure level, 96 dB, crossover frequency, 1,000 Hz, crossover frequency, 1,000 Hz, W1,070 x H1,525 x D670 mm, weight approx. 85 kg
The disposal price has been reduced! Member prices are not applicable. 2025/12/10 sales price 2,780,000 yen with dedicated stand! The color is the special color Bororo Red. It is a brand founded by the designer of the first generation Nautilus, and the visual impression is somewhat reminiscent of Nautilus. Of course, the sound is also beautiful, like a Nautilus, and it beautifully expresses a large space. It's a speaker where you can even feel the singer's real breath. There are small scratches on the exterior. Serial 3993/3994 (Tamura Eiji)
Maintenance information: 2025.12.10 sweep check OK
Accessories: dedicated stand (https://stella-inc.com/vivid/page/base_g3g4.html)、スパイク、スパイク受け、取扱説明書、ジャンパーケーブル
Main specifications: 4 way 5 speaker tube absorber bass reflex system 88 dB 6 ohm frequency band 29 to 36,000 Hz maximum allowable input 800 W (music power) W360 x H1383 x D638 mm weight approx. 55 kg stand part: W330 x H160 x D460 mm weight approx. 12 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/12/11 sales price 250,000 yen Maintained! This is the 2010 version of the SV-2. This time it will be the 211 model. Compared to the 2007 model, it has a plump and glossy sound like a vacuum tube amplifier. There are also 4 input systems, so it's easy to use. There are scratches and paint peeling on the exterior. (TAMURA Eiji)
Maintenance information: 2025.12.11 Maintained (input volume and function switch replaced. Installing the bonnet fixture. Vacuum tube pin cleaning. Solder correction. Bias check. Voice check for each input and output. Output approx. 9 W (8 ohms))
Accessories: instruction manual, power cable, bonnet
Main specifications: 4 input systems with volume W410 x D408 x H251 mm weight 35 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/12/12 sales price 178,000 yen Maintained! Mcintosh tube FM tuner MR71 The sound unique to FM broadcasts has an appeal different from CDs and records, and the FM sound with a thick, sweet Macintosh sound is exceptional. The exterior has oxidation, scratches, etc. Serial 3181 (Fujisawa Yukishi)
Maintenance information: 2025.12.12 Maintained (tube all pin polishing. Replace the filter capacitor in the power supply section. Output coupling capacitor replacement. F cover sensitivity readjusted. internal and external cleaning)
Accessories: No accessories
Main specifications: frequency characteristics 20Hz to 20kHz SNR 70dB separation 35dB harmonic distortion ratio 0.5% output level 2.5V W407 × H138 × D335 mm weight 14.5 kg
The disposal price has been reduced! (Member discounts are not applicable) 2025/12/15 sales price 1,200,000 yen Maintained! It's a crossroads preamp that follows the Cello ENCORE 1MΩ flow. The sound is innocent yet supple and nostalgic. It is a valuable car where you can experience the awesomeness of the infinitely neutral and transparent sound that VIOLA promotes without any coloring. There are small scratches, dullness, and a feeling of use. Serial 0087 (Fujisawa Yukishi)
Maintenance information: 2025.12.15 Maintained (volume disassembly contact cleaning. The GAIN volume shaft knob is adjusted with clearance between panels. Attach the power connector receiving screw. Check the operation of each input/output)
Accessories: connection cord, power cord
Main specifications: fixed resistance switching type analog amplifier circuit module equipped with 4 output systems (XLR x 2, Fischer x 1, RCA x 1), 6 input systems (XLR x 1, Fischer x 1, RCA x 4) TAPE OUT (RCA x 1) main body W445 x H110 x D430 mm 9 kg power supply unit W225 x H110 x D400 mm 7.6 kg
The disposal price has been reduced (member prices are not applicable) 2025/12/4 sales price 28,000 yen RCA cable 1.0m, the upper series “Python” of the AudioQuest interconnect cable. In addition to the balanced triple PSC+ conductor, Teflon tube air insulation is used as an insulating material. In addition to the beauty of the high-pitched sound typical of a quest, the sound quality is deep. On the exterior, there is a feeling of use such as dark spots on the terminals (Tamai Jun)
Maintenance information: 2025.12.4 continuity confirmed
Accessories: none
The disposal price has been reduced (member prices are not applicable) 2025/12/4 sales price 28,000 yen RCA cable 1.0m, the upper series “Python” of the AudioQuest interconnect cable. In addition to the balanced triple PSC+ conductor, Teflon tube air insulation is used as an insulating material. In addition to the beauty of the high-pitched sound typical of a quest, the sound quality is deep. On the exterior, there is a feeling of use such as dark spots on the terminals (Tamai Jun)
Maintenance information: 2025.12.4 continuity confirmed
Accessories: none
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. 2025/11/22 sales price 79,800 yen Limited edition model commemorating the 80th anniversary of Stax's founding. Based on the entry-class “SR-L300,” it is equipped with an MLER oblong sound unit used in advanced models. Recommended as an introduction to electrostatic headphones (Ryo Mizusaki)
Maintenance information: 2025.11.22 sound output confirmed
Accessories: instruction manual, original box
Main specifications: Open air electrostatic type, sensitivity 101 dB/100 V, playback frequency band 7 Hz to 41 kHz impedance 145 kΩ, dedicated 5 pin terminal for input connectors, weight 486 g (including attached cable)
The price has been reduced. 2025/12/17 sales price 99,800 yen Maintained by the manufacturer! Line-only premain amplifier using EL34. The sharp sound of the EL34 tube is impressive. It has a glossy tone unique to tube amplifiers with a modern sense of range and good response. There is a slight dent on the front (Daiki Goto)
Maintenance information: 2025.12.17 Triode maintenance completed (JJ EL34 x 4 units were replaced, and various parts were inspected and maintained, including selector polishing.)
Accessories: manual, power cable
Main specifications: circuit type EL-34 ultra linear connection AB grade push-pull drive rated output 45W+45W (8Ω) SN-ratio 90dB vacuum tubes JJ EL34 x 4, 12AX7 x 1, 12AU7 x 2 speaker output terminals 6Ω/8Ω input 4 systems W330 x H150 x D315 mm 15 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 price has been reduced. 2025/12/15 sales price 99,800 yen Equipped with a JET V tweeter that is also used in the higher-level 300/400LINE. The round cabinet and network have been revamped, so you can enjoy an even more refined and clear ELAC sound. There is a scratch on the back corner of the top plate (Sasaki Shota)
Maintenance information: 2025.12.15 operation confirmed
Accessories: felt seals, screws
Main specifications: 2-way bass reflex efficiency 87 dB impedance 4 ohms frequency characteristics 41 to 50,000 Hz crossover frequency 2,500 Hz maximum input 80 W 192 x H285 x D 285 mm weight 6.6 kg
The price has been drastically reduced. 2025/12/15 sales price 1,980,000 yen Internal and external maintenance has been applied and brushed up! This is Tannoy's highest flagship model. A famous machine that has a majestic scale and an overwhelming presence, and plays high-quality playback sound from an elegant design that looks like a work of art. You can immerse yourself in the music without getting tired of listening. The high level of musicality, which is the opposite of current monitor speakers, is attractive (Sasaki Shota)
Maintenance information: 2025.12.15 Maintained (exterior repair/polishing/oil finish. Saran net cleaning/repasting, frame repair. Unit maintenance: low range side edge replacement/magnetic circuit gap cleaning/center adjustment, high frequency side magnetic circuit gap cleaning center adjustment. Network maintenance: frequency characteristics check, ATT part contact cleaning, low frequency capacitor replacement, faston terminal cleaning)
Accessories: key
Main specifications: coaxial 2-way front+backload horn crossover frequency 1,000 Hz efficiency 99 dB W980 x H1,395 x D560 mm weight 138 kg
The disposal price has been reduced. Member prices are not applicable. 2025/11/14 sales price 29,800 yen There is no problem with operation, but the dome is cheap because there is corrosion and overall dullness. FOSTEX's full range, which fully uses pure magnesium as the diaphragm, is now in stock. It is the opposite of the MG100HR for bass reflex seals, and is made for backloads. The delicate, highly transparent tone characteristic of magnesium is attractive. The color of corn paper is different on the left and right (Sasaki Shota)
Maintenance information: 2025.11.14 sweep test good
Accessories: none
Main specifications: 10cm full range unit 86.5db 8Ω W165 x H898 x D185 mm
The price has been reduced. 2025/12/18 Sales price 798,000 yen Maintained using carefully selected parts such as vacuum tubes, electrolysis, block capacitors, etc. You can enjoy a glossy mid to high range sound with a high sense of transparency and a thick, exquisite balance. It's a model that has been over half a century since it went on sale for analog fans, but it's still one they admire. The lustrous, indescribable tone is an appeal that cannot be enjoyed on modern devices. There is a feeling of use such as a line scratch on the left side of the front panel, small scratches on the wood case, dullness, and dirt on the back. Serial 7-21677 (Murakoshi Yoichi)
Maintenance information: 2025.12.17 maintained (each switch and selector contact repair, vacuum tube ECC83 x 1, shield case replacement, replacement and addition of 3 50μF block capacitors, 200μF electrolytic capacitors and 5 others, vacuum tube socket and RCA jack caulking repairs. (*Operation has also been checked with AC 100 to 117 V)
Accessories: none
Main specifications: tubular control amplifier, vacuum tube, ECC83/12AX7, 3-stage NF equalizer, NF type step switching control, W453 x H185 x D267 mm, 7.5 kg
The price has been reduced. 2025/12/19 Sales price 898,000 yen Overhauls such as unit network maintenance and exterior repairs were carried out! Equipped with an original enclosure and 15 inch monitor gold. It is an individual that sounds much better, probably because of individual differences. A speaker representing Tannoy that brings out the appeal of all sources. In particular, the beautiful, glossy sound in string and vocal music plays such a sound that once you hear it, you won't be able to leave your ears. ※Saran net has been exchanged (Takasaki Atsushi)
Maintenance information: 2025.12.18 maintained (exterior repair/polishing/painting, unit maintenance: magnetic circuit gap cleaning/center adjustment for both low and high frequencies, network maintenance: frequency characteristics check/ATT cleaning/4 pin terminal cleaning, high frequency capacitor replacement, unit detachment and sound absorbing material detachment)
Accessories: none
Main specifications: 2 way 1 speaker bass reflex system floor type 15 inch coaxial 2 way (Monitor Gold 15 inch) frequency characteristics 30 Hz to 2000 Hz crossover frequency 1,000 Hz maximum input 50 W impedance 8 ohms size W597 x H1,070 x D375 mm
The disposal price has been reduced. Member discounts are not applicable. 2025/12/16 sales price 998,000 yen ※ It is cheap because you can see many signs of use, such as abrasions and peeling veneer that are noticeable on the exterior. Rebel Audio's flagship ULTIMA tall boy speaker. A woofer equipped with a neodymium magnet using a pure titanium diaphragm, and a 4-way configuration with a mid-range and forged pure beryllium tweeter. There is a sense of unity in the unit structure, and the powerful sound with good cohesion like a full range is attractive (Takasaki Atsushi)
Maintenance information: 2025.12.16 sound output confirmed
Accessories: saran net
Main specifications: 4-way 6Ω 86dB crossover 150Hz, 575Hz, 2.3kHz W356 × H1,385 × D584 mm 80.7 kg
The price has been drastically reduced. 2025/12/18 sales price 798,000 yen Diamond Tone 70th anniversary model. Using NCV-R made by blending and molding carbon nanotubes and several types of resins as the vibrating plate, it stands out for its high speed, good response, and excellent sound response. Using a unit made of the same material, the sound is attractive, and you can feel the natural texture and thickness of a full range. Serial BR8B283/BR8B284 (Takasaki Atsushi)
Maintenance information: 2025.12.18 sound output confirmed
Accessories: instruction manual
Main specifications: 2 way 2 speakers, bookshelf impedance, 4 ohms, efficiency 88 dB, playback frequency band, 38 Hz to 80 kHz, W270 x H473 x D289 mm, 17 kg
The disposal price has been reduced. Member prices are not applicable. 2024/9/16 sales price 59,800 yen edge has been replaced! This is a 38cm passive woofer for use in combination with 136A. I think it would be interesting to team up with 136A in a 150-liter enclosure and use 075 to make a replica of the Olympus S8R (Oikawa Tetsuji)
Maintenance information: 2024.9.16 Maintained (edge replacement, damper adhesion repair)
Accessories: none
Main specifications: 38cm cone type passive radiator recommended enclosure 114 L to 169 L 3.2 kg
The disposal price has been reduced. Member prices are not applicable. 2025/10/16 sales price 89,800 yen Maintained. JBL professional 2 inch screwdriver It is an item that continues to be used today in large horn systems, etc. The quality unique to titanium diaphragms makes the vocal breathing, drum hi-hat, and excellent reality no matter which one you take (Oikawa Tetsuji)
Maintenance information: 2025.10.16 Maintained (vibration plate installation adjustment, insulation bushing deterioration replacement vibration plate, terminal cleaning
Pad dampener replacement DCR (23523 7.7 ohm vibrating plate scratch) (23567 7.9 ohm vibration plate scratch free)
Accessories: none
Main specifications: 2 inch driver, slot diameter: 5 cm; allowable input: 100 W; sound pressure level: 111 dB; frequency characteristics: 500 Hz to 20 kHz; crossover frequency: 500 Hz or more; 16 ohms; diameter: 235 x depth: 132 mm; 13.6 kg/bottle
The disposal price has been reduced. Member prices are not applicable. 2025/8/8 sales price 99,800 yen Maintained! JBL professional 2 inch screwdriver It is an item that continues to be used today in large horn systems, etc. The quality unique to titanium diaphragms makes the vocal breathing, drum hi-hat, and excellent reality no matter which one you take. There are scratches and stroke marks all over (Kojima Yosuke)
Maintenance information: 2025.8.8 maintained (vibration plate installation adjustment, installation screw replacement, pad dampener replacement terminal ultrasonic cleaning
DCR (SN:88607/8.3 ohm/vibration plate without scratches)
(SN:63434/8.3 ohm/vibrating plate without scratches)
Accessories: none
Main specifications: 2 inch driver, slot diameter: 5 cm; allowable input: 100 W; sound pressure level: 111 dB; frequency characteristics: 500 Hz to 20 kHz; crossover frequency: 500 Hz or more; 16 ohms; diameter: 235 x depth: 132 mm; 13.6 kg/bottle
The disposal price has been reduced. Member discounts are not applicable. 2025/6/3 sales price 89,800 yen Manufacturer maintained! This is DENON's famous record player from yesteryear. This is a cost performance model of the DP-5000 that uses a direct drive servo turn tape and achieves a stable speed of rotation. Equipped with the SME3009S2imp, which is dedicated to light needle pressure but boasts excellent tracing performance, you can listen to record playback with a sense of stability.
Maintenance information: 2025.6.3 manufacturer maintained (capacitor and transistor replacement around the head amplifier. 33/45RPMSW, STOPSW, LEAF SW CLEANING Speed adjustment, operation test.)
Accessories: copy of the manual
Main specifications: DP-3000 servo type direct drive speed 33, 45 rpm 3009S2IMP: short arm for light needle pressure, static balance type, needle pressure 0 to 1.5 g, cartridge weight 4 to 9 g, DK-100 cabinet, Rawan material 70 mm, laminated plywood size W530 x H170 x D420 mm
The price has been reduced. 2025/11/9 sales price 29,800 yen There is no problem with the sound output operation, but it is cheap due to missing dust covers and hinges. 6 month warranty. A fully automatic player with high convenience. The ease of setting is also attractive, but after all, the repeat function and location mechanism that allows you to move to the desired position and perform without touching the tone arm are convenient, so you can easily enjoy analog. Cartridge is not included (Sasaki Shota)
Maintenance information: 2025.11.9 operation confirmed
Accessories: shell
Main specifications: fully automatic player, direct drive, 33/45 rotation, variable needle pressure range, 0 to 3 g, compatible cartridge, dead weight 3 to 12 g (including screws and nuts), W434 x H179 x D410 mm, 8.5 kg
Disposal price reduction. 2025/10/12 sales price 15,000 yen JBL straight short horn for 1 inch drivers. This is a standard horn used in various models. The paint is peeling off and there are small scratches (Oikawa Tetsuji)
Accessories: none
Main specifications: Orientation characteristics 90° (horizontal) 45° (vertical) throat diameter 2.5 cm, crossover frequency 500 Hz or more, total length 216 mm, 1.1 kg/1
The price has been reduced. 2025/12/16 sales price 65,000 yen JBL professional tweeter. Since it is designed to make the sound fly far, the sound quality is solid and more straight compared to the company's consumer model 077. The mid to high frequencies are vivid, and the low frequencies are finished with a tight sound. There is dullness, rust, etc. (Oikawa Tetsuji)
Maintenance information: 2025.12.16 Operation confirmed
Accessories: none
Main specifications: horn type tweeter impedance 16 ohms playback frequency band 6,500 to 21,500 Hz (manufacturer specified), crossover 7 kHz, efficiency 105 dB, W100 x D84 mm, 3 kg/book
The price has been reduced. 2025/5/25 sales price 25,000 yen ※1 bottle only, the center cap is dented, and the cone paper is scratched. 38cm woofer from JBL. It can also be used in theaters and is used as a bass horn driver or multi-woofer system. Thin cone paper and hard edges make it possible to play bass without feeling lumpy (Oikawa Tetsuji)
Maintenance information: 2025.5.25 Operation confirmed
Accessories: none
Main specifications: 40Hz to 2kHz 8Ω 101 dB 100W front mount 355 mm rear mount 343 mm screw pitch 370 mm diameter 388 x D146 mm 7.7 kg