The price has been reduced. 2024/5/29 sales price 108,000 yen This is an MC-only phono equalizer that was sold to commemorate the 25th anniversary of the birth of the LP12. It is designed so that the sound of the LP12 can be enjoyed at its best by simplifying the signal path and installing a low noise power supply. The center of gravity is low and the sound quality is high in texture, but surprisingly, it is compatible with the SPU and can be used for a wide range of purposes. There is an appearance, dullness, threads, and a feeling of use (Kobayashi Hitoshi)
Maintenance information: 2024.5.29 Operation confirmed
Accessories: power cable
Main specifications: Phono equalizer for MC cartridges, input level 150 μ/480 μV, input cae impedance 1500/4.7 nF, W320 x H80 x D326 mm, 1.5 kg
The disposal price has been reduced! Member prices are not applicable. 2024/4/28 sales price 118,000 yen including new dust cover created and maintained! Torrens basic model. You can enjoy rich musical analog sound with the genuine TP90 straight arm. Belt drives, double platter floating suspensions, and the basics of record players that continue to continue in Europe are firmly held in place. The exterior is dull. Serial 21727 (Fujisawa Yukishi)
Maintenance information: 2024.4.28 maintenance (new dust cover created. (Rewinding the lifter lever lock solenoid coil, end detection cam processing correction, end position adjustment, belt replacement, board inspection, rotation check arm operation, voice check)
Accessories: arm adjustment strut, AC adapter
Main specifications: 50Hz/60Hz compatible W440 x H150 x D340 mm weight 11 kg
The disposal price has been reduced. Member discounts are not applicable. 2024/5/17 sales price 128,000 yen ※Depending on the arm base, the mounting position of the arm is slightly close to the shaft side. Since the arm is long, please remove the dust cover for playback. Comes with SAEC arm stabilizer AS-500! A record player that is highly regarded for its smooth rotation and the effectiveness of the insulator's suspension. The WE-308 arm features a double knife edge for sharp sound and accurate sound image localization. It is a combination of LUX's smooth and quiet motor and SAEC arms that cut sharply into the sound source, so you can fully enjoy the fun and depth of analog. Additional rubber feet have been attached to the legs to prevent the AS-500E. The exterior is dull and has small scratches. Serial G8903281 (Murakoshi Yoichi)
Maintenance Information: 2020.6.2 Maintained (created with strobe circuit LED. diode installation. Electrolytic capacitor replacement. Power circuit film capacitor replacement. (Inside Force cancellation weight exchange)
Accessories: phono cable
Main specifications: PD-131 direct drive system 8 pole 24 slot brushless DC servo motor W472 x H160 x D372 mm weight 12 kg WE-308 double knife edge static balance universal type total length 329 mm effective length 240 mm overhang 5 mm needle pressure 0 to 2 g cartridge weight range: 5.5 to 12.5 g
2022.9.10 This is the first 607 model that has undergone full maintenance, such as replacing capacitors, transistors, and SP terminals! It's one that makes you feel the intricacies unique to the heyday of audio. You can feel the strength of extrusion in the low range when playing LP records and the dynamic sense of dynamism with an intonation in the middle range, which is unique to the golden age of SANSUI. The exterior has dullness and small scratches. Serial 227050109 (Yonejima Satoshi)
Maintenance information: 2022.9.10 Maintained (electrolytic/tantalum capacitors, transistors, SP terminal replacement, RCA terminal polishing. Board cleaning and re-soldering. SW/VR disassembly and cleaning, application of grease to prevent oxidation and sulfation, replacement of tantalum capacitors, electrolytic capacitors, transistors, and heat dissipation sheets in the EQ/TONE section. Semi-fixed resistor, cement resistor, fuse resistor, fuse, relay replacement. Input waveform confirmation, load test (1kHz sine wave, 8Ω load: 65W+65W OK) sound output test)
Accessories: copy of instruction manual
Main specifications: 65W+65W (8Ω) W430 × H168 × D389 mm 15.3 kg
The disposal price has been reduced! (Member price not applicable) 2024/5/24 sales price 128,000 yen A digital amplifier equipped with a Tripath class T PWM amplifier IC. It beautifully expresses the sense of energy and description. Gain can also be switched on the back, and it is compatible with a wide range of input sources. On the exterior, there are oxidation and scratches on the manufacturer logo. Serial 100210015 (Tamura Eiji)
Maintenance information: 2024.5.24 Operation confirmed
Accessories: instruction manual, power cable, spike
Main specifications: output 150W+150W (8Ω) 240W+240W (4Ω) W420 x H98 x D395 mm weight 13 kg
Designed with a complete dual mono configuration from the power transformer. The pre and power are also independently configured. The high range is sparkling, and the mid and low frequencies are thick, making it a profound sound. The exterior has dullness, threads, and scratches on the front (Ryo Mizusaki)
Maintenance information: 2024.5.31 Maintained (The battery was replaced and the board pattern was corrected due to liquid leakage in the function memory battery. (Since the VR shaft is long, accuracy cannot be achieved, and stress is applied to the VR, so the extension shaft flexible joint Assy was replaced)
Accessories: remote control, instruction manual, power cord
Main specifications: effective output 85W+85W (8Ω) 170W+170W (4Ω) input: unbalanced (RCA) x 6 systems (1 system is PHONO: MM/MC compatible, 1 is TAPE) outer dimensions W440 mm x H95 mm x D400 mm weight 13 kg
The disposal price has been reduced! Member prices are not applicable. 2024/5/17 sales price 99,800 yen ※The HDD has been changed to an SSD (2TB). This is a black model that has upgraded the DELA N1A/N1Z, which was announced and sold as the industry's first “audio NAS,” and improved commerciality. Equipped with a dedicated USB-DAC connection terminal, the rear design has been renewed. In addition to being equipped with a 60W high-capacity power supply unit, a newly developed high-capacity capacitor bank is mounted on the rear stage of the power supply unit. A newly selected 3.5-inch quiet drive is mounted on a floating silicon bush to improve sound quality. There are scuff marks and dirt marks on the exterior. Serial 40300161000139 (Fujisawa Yukishi)
Maintenance information: 2024.5.17 Operation confirmed
Accessories: power cord
Main specifications: storage capacity 2TB (2TB SSD x 1) input/output terminal USB 3.0 x 3 (import/capacity expansion/backup) USB 2.0 x 1 (for USB-DAC connection) RJ45 x 2 (router connection/network player) compatible file format WAV · AIFF · FLAC · ALAC · DSF · DFF sample frequency 44.1/88.2/176.4/352.8/48/96/192/384 kHz (PCM) 2.8 /5.6/11.3 MHz (DSD) compatible bits 16 to 32 bits (PCM) W436 x H70 x D352 mm weight 7 kg
The price has been reduced! 2024/5/25 sales price 89,800 yen Maintained! CG25D is a staple mono needle and is the highest peak. The precise, thick, and thick sound brings out a unique sense of density that is different from stereo needles. The exterior is dull all over, and paint peeling can be seen on the body. Serial 137743 (Yonejima Satoshi)
Maintenance information: 2024.5.25 Maintained (damper replaced)
Accessories: No accessories
Main specifications: mono round needle, MC type, output voltage: 1.5 mV, proper needle pressure: 3.5 g, dead weight: 32 g
※The color may fade due to sunburn on the side, so it is inexpensive. A classic bookshelf speaker with a small yet firm sense of volume and texture that makes a good impression. It reproduces music without choosing a genre. There is a feeling of use on the exterior due to sunburn, small scratches, etc. (Tamai Jun)
Maintenance information: 2024.5.31 sound output confirmed
Accessories: saran net jumper plate
Main specifications: Playback frequency band 45Hz to 50kHz 8Ω W165 × H280 × D260 mm 6.7 kg/1
Maintained! SPU round needle type with built-in transformer. This is a shell from the Knicks era. The rich, rich SPU-like sound is attractive. The built-in transformer gives the impression that transparency and clarity have been improved. Needle cover missing. The exterior has a feeling of use such as dullness. Serial 340898 (Murakoshi Yoichi)
Maintenance information: 2024.5.29 Maintained (cantilever, damper adjustment, rubber cover replacement, cleaning)
Accessories: none
Main specifications: MC type with built-in transformer output 10 mV needle pressure 3 to 4.5 g dead weight 32 g
The disposal price has been reduced! (Member discounts are not applicable) 2024/3/29 sales price 138,000 yen Sneaky DSM with built-in network player function and 2ch amplifier has arrived. It has a smart design that eliminates anything superfluous, and can be operated with an iPod or the like. Of course, it also has an excellent external input function. There are some minor scratches on the exterior. Genuine Rin Japan. Serial 1333455 (Tomonori Asaine)
Maintenance information: 2024.3.29 Operation confirmed
Accessories: Speakon remote control power cable setup manual
Main specifications: analog input: RCA1 system digital input: coaxial, 1 optical system, 3 HDMI output, 1 HDMI system*RCA has variable output and fixed output can be changed by setting Compatible files: FLAC, WAV, Apple Lossless, AIFF, MP3, WMA, AAC, OGG Compatible Bits: 16 to 24 bits 33W ✕ 4ch (4Ω) W350 ✕ H54.5 ✕ D215mm Weight 2.3 kg
The price has been reduced! 2024/5/28 sales price 79,800 yen Maintained by the manufacturer in 2024/4! DENON's pre-main amplifier. It is a mid-size model, and a staple machine with excellent stability, with firm bass and delicate high frequencies. In addition to the bass energy from conventional models, you can enjoy well-balanced sound that takes into account the high mid to high frequencies with a high sense of transparency. There is a feeling of wear on the exterior, such as scratches and dullness. Serial 8061507480 (Jun Tamai)
Maintenance information: 2024.4.17 manufacturer maintained (Rch amplifier circuit, transistor and resistor replacement. Amplifier board soldering correction (both channels). (Idle current adjustment and operation inspection carried out.)
Accessories: instruction manual, power cable, original box
Main specifications: rated output 80W+80W (8Ω) PHONO1 system (MM/MC switching) dimensions W434 x H181 x D480 mm weight 24.0 kg
The disposal price has been reduced! (Member prices are not applicable) 2024/5/16 sales price 99,800 yen Maintained! A speaker that allows you to enjoy the powerful sound of JBL. A vertical twin that uses bi-radial horns for the tweeter and is developed with an upper and lower 20cm woofer. Sound pressure, which is characteristic of horns, is uniformly distributed within the area, and you can experience a wide service area. The exterior has been beautifully finished due to maintenance. Serial 5340-015070 5340-015071 (Asaine Tomoho)
Maintenance information: 2024.5.16 Maintained (exterior cleaning/touch-up saran net cleaning/frame repair/paint tweeter maintenance (magnetic fluid removal/cleaning/center adjustment in the magnetic circuit gap, left and right sound pressure difference adjustment, internal urethane replacement) woofer maintenance (edge replacement, gasket preparation and installation) unit detachment)
Accessories: saran net
Main specifications: output sound pressure level 92 dB frequency characteristics 35 Hz to 20 kHz W318 x H965 x D413 mm weight 34 kg
Maintained! For the first time in about 22 years, the musical Fidelity PREAMP3A has arrived. The circuit is based on a vacuum tube design, uses a low noise MOS-FET and uses a low NFB. The power supply unit has an external design, eliminates mutual interference with the audio circuit, and is particular about sound quality. The exterior is painted bald. Serial 03269 (Tamura Eiji)
Maintenance information: 2024.5.30 Maintained (poor contact with each SW/VOL, poor RCA contact → cleaning (chips cannot be removed) C deterioration replacement in the board, internal shaft, etc., rust/sticking → cleaning. Operation check OK.)
Accessories: none
Main specifications: W408 x H60 x D249 mm weight 5.5 kg
It hasn't been in stock in a long time! Accuphase Premium Cartridges Using a sapphire tube cantilever, the sound is straightforward with no specific sound, almost no distortion, and a perfect sense of range. Now it's a manufacturer that pushes ahead with the cutting edge of digital audio, but it's a cartridge where you can once again feel the high level of analog audio technology (Yamato Yuki)
Maintenance information: 2024.5.31 operation confirmed
Accessories: The original box needle cover is missing
Main specifications: MC type output voltage 0.18 mV needle pressure 1.5 to 2.5 g optimal 2 g impedance 4 ohms line contact needle
The disposal price has been reduced! (Member prices are not applicable) 2023/5/9 sales price 69,800 yen Maintained! It's a simple and easy to use preamp. Compared to the C-2, it has a clearer impression and allows you to listen to acoustic sources such as vocals and violin with a smooth sound. PHONO is also fully compatible with MM and MC. There is a feeling of use on the exterior such as dullness and small scratches (Asaine Tomoho)
Maintenance information: 2024.5.9 Maintained (replacement of faulty capacitors in the power supply circuit, replacement of power lamps. Solder correction on all circuit boards. (Disassemble switches, polish contacts and apply contact cleaner)
Accessories: none
Main specifications: PHONO2 system (MM/MC) LINE 2 system TAPE2 system size W435 x H96 x D369 mm weight 7.5 kg
Maintained! A model based on the CDP-502ES with digital outputs and insulators added. It plays a delicate and detailed sound while maintaining the firm low frequencies and good vocal localization typical of Sony. You can see a feeling of use on the exterior, air cap marks, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.3.12 maintenance completed (grease re-coating of each part of the CD mechanism, mechanical drive belt replacement, tact switch replacement, optical system cleaning)
Accessories: none
Main specifications: Unilinear multi-bit D/A converter linear pick mechanism coaxial digital out copper-plated chassis multi-bit machine W430 × H80 × D365 mm 9.0 kg
Maintained in 2023/7! A control amplifier that inherits the sound of Yamaha's famous C2a. A highly reliable phono equalizer is used, so you can enjoy both MM/MC. It has a clean sound typical of Yamaha, and clarifies the outline of the sound. In addition to dullness and small scratches on the exterior, there are scratches on the front sub-panel and insulator marks on the top plate. Serial E052015SU (Hiroki Aso)
Maintenance information: 2023.7.13 Maintained (PHONO circuit IC/capacitor replacement, main board, soldering, deterioration, all correction, volume type, contact correction, long time sound output check)
Accessories: copy of instruction manual
Main specifications: 3 line inputs, 3 tape terminals, 1 phono input (MM/MC), W438 x H86 x D405 mm, 8.8 kg
Denon's current CD player. Made in 2023 It is equipped with AL32 Processing Plus, which upsamples 44.1 kHz/16 bit data to 705.6 kHz/32 bit during CD playback and performs bit expansion processing. It comes with a front USB input that supports DSD high-resolution file playback. It is in good condition with no noticeable scratches. Serial DBTG082303357 (Fujisawa Yukishi)
Maintenance information: 2024.5.31 operation confirmed
Accessories: remote control, instruction manual, power cord, RCA cable, original box
Main specifications: output RCA, digital coaxial, 1 optical system each W434 x H107 x D328 mm 4.9 kg
Maintained! NAKAMICHIN's pre-main amplifier is in stock for the first time in a while. Simple design like an English amp. The thick, energetic sound typical of Nakamichi is attractive. The exterior has dents, dullness, and small scratches on the top plate. Serial 07436 (Yonejima Satoshi)
Maintenance information: 2024.5.31 Maintained (power switch replaced. Output relay replacement. (Switch and volume contact correction)
Accessories: No accessories
Main specifications: 80W+80W (8Ω) equipped with Phonomm/MC W430 x H125 x D360 mm weight approx. 15.0 kg
The neat and precise design using birch wood and the beautiful tone without turbidity are unique to YAMAHA. It makes me want to play it in a tasteful way with a simple pre-main amplifier. The highly transparent, fresh sound fills the room comfortably. There are exterior, sunburn, bruises, and abrasions (Murakoshi Yoichi)
Maintenance information: 2024.5.29 sound output confirmed
Accessories: saran net
Main specifications: 2 way, 2 speakers, sealed system, bookshelf type, anti-magnetic design impedance 6 ohms, 86 dB, W205 x H382 x D285 mm, 9.5 kg/unit
Maintained! A preamp with plenty of phono that analog users are happy with. There are 3 PHONO inputs, 5 MM cartridge loads, and a dedicated transistor is used for the MC head amplifier, so you can enjoy clear, sharp sound with a clear outline (Yoichi Murakoshi)
Maintenance information: 2024.5.29 maintenance (switch disassembly, contact polishing, contact cleaner application. Volume contact correction. Replace deteriorated parts in each circuit. PHONO circuit IC replacement display lamp replacement. (I/O pin jack polish)
Accessories: none
Main specifications: input terminal/3 phono systems (MM/MM/MC), TAPE2 system, AUX, TUNER power consumption 40W external dimensions W435 x H116 x D376 mm weight 8.5 kg
Hamilex compact 4-tier rack. The design is simple and you won't get tired of it. The shelves can also be adjusted, making it easy to use. The screw holder on the reinforcing column rotates idle and the screw cannot be stopped completely. There are blows and scratches on the exterior (Murakoshi Yoichi)
Accessories: none
Main specifications: Top plate load capacity: 100 kg or less Shelf board load capacity 50 kg or less Bottom plate load capacity 100 kg or less Total load capacity 250 kg W591 x H600 x D550 mm Weight 31.5 kg
The price has been reduced! 2024/5/28 sales price 39,800 yen Genuine stand for the B&W805 series. It enhances the sound quality of the speaker and has an appeal unique to genuine products. The exterior has a feeling of use such as dullness and small scratches (Jun Tamai)
Accessories: instruction manual, mounting screw, spike holder (general purpose)
It is a Schumann resonance wave (7.83 Hz) generator that increases the S/N ratio by canceling electromagnetic waves etc. generated from the entire audio equipment. To use it, power the included AC adapter from an electrical outlet and place the main unit as high as possible in the room (1 m 50 cm or more). There is no noticeable damage to the exterior (Tomonori Asae)
Main specifications: Schumann resonance wave (7.83 Hz) generator input voltage 12V W140 × D170 × H50 mm 220 g
※6 month warranty. It is a speaker that was made for natural sound and gained popularity. There is no sense of emphasis and there is a good balance of strength between the high and low frequencies, which have a high texture, and it makes me feel the high level of musicality. There are scratches on the exterior. Serial 16400837L, 16400837R (Fujisawa Yukishi)
Maintenance information: 2024.5.31 operation confirmed
Accessories: jumper cable
Main specifications: 2-way, 2-speaker sealed, magnetic-proof type, W270 x H456 x D290 mm, 12.5 kg
The price has been drastically reduced! 2024/5/18 sales price 39,800 yen Flat speaker using 600 neodymium magnets. It is built into a self-made enclosure. It is an audio speaker that is mainly used outdoors for station announcements and as a large digital signage product for outdoor use. As for the exterior, there are screw holes in the top plate, and there are dullness and small scratches all over (Yonejima Satoshi)
Maintenance information: 2024.5.18 sweep test good
Accessories: No accessories
Main specifications: MCMA multi-cell flat speaker impedance 8Ω frequency specification 90Hz to 10kHz W270 x H375 x D205 mm 5.2 kg (actual measurement)
The price has been reduced! 2024/5/16 The CD mechanism has been replaced with Denon at a sales price of 35,000 yen! Denon design series CD player. It is equipped with an inexpensive yet highly accurate D/A converter that is compatible with MP3 and WMA files. Since it can also be used vertically, it is attractive that it is easy to adjust where it is placed. The exterior is dull and has small scratches. Serial ADR 27190603014 (Tamura Eiji)
Maintenance information: 2024.5.16 manufacturer maintained
Accessories: remote control, power cable
Main specifications: analog output x 1, coaxial digital output x 1 size W200 x H86 x D 240 mm, weight 2.4 kg
Equipped with an original needle. A rare TYPE2 from the popular V15 series. Although it is MM, the resolution is high, and the power of the low frequencies and the ease of transmission are attractive. The exterior is dull and scratched. There is no such thing as needle bends (Murakoshi Yoichi)
Maintenance information: 2024.5.26 sound output confirmed
Accessories: none
Main specifications: mm type output 3.5 mV needle pressure 0.75 to 1.5 g dead weight 7 g
*Currently sold. A small speaker with a 16.5 cm woofer. This is a high cost performance speaker that allows you to listen to rich musical sounds that are beyond its size. The full expressive power of the mid-range is attractive. The exterior is good with no conspicuous scratches. Serial 37866 (Yonejima Satoshi)
Maintenance information: 2024.5.30 good sweep test
Accessories: saran net
Main specifications: 2 way impedance 8 ohms efficiency 90 dB playback frequency band 43 to 21,000 Hz W227 x H360 x D230 mm 7 kg
The price has been reduced. 2024/5/25 sales price 29,800 yen. ※There is slight distortion, but I don't mind playing music. Altec's 10cm full range unit is rarely in stock. An ALTEC unit with an orthodox design suitable for bass reflex. Please enjoy the speedy sound unique to ALTEC. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.5.21 operation confirmed (slight distortion, no problem with music playback)
Accessories: instruction manual, gasket
Main specifications: inch screw pitch, 120 mm, playback frequency characteristics, 130 to 14,000 Hz, efficiency: 94 dB, impedance: 7 ohms, weight: 0.8 kg
The price has been drastically reduced. 2024/5/3 sales price 29,800 yen A compact bookshelf speaker equipped with a high-resolution “Terylene Dome Tweeter.” It achieves clear, high-definition treble. There is a slight feeling of use (Takasaki Atsushi)
Maintenance information: 2024.5.3 sound output confirmed
Accessories: instruction manual, original box, saran net
Main specifications: Playback frequency band 44Hz to 40kHz impedance 4Ω W192 x H306 x D259 mm 5.9 kg
Taock SCB series sound creation board. Sandwich structure and special coating for high-density wooden boards, surface materials, and back materials centered around a honeycomb core containing cast iron powder. Spikes can be attached as an option. The unique vibration control structure greatly improves the sense of localization and sound field of sound. The exterior has scuffs, dents, felt on the bottom, etc. (Tamai Jun)
Accessories: none
Main specifications: W500×H52×D450mm 10kg
Taock SCB series sound creation board. Sandwich structure and special coating for high-density wooden boards, surface materials, and back materials centered around a honeycomb core containing cast iron powder. Spikes can be attached as an option. The unique vibration control structure greatly improves the sense of localization and sound field of sound. The exterior has scuffs, dents, felt on the bottom, etc. (Tamai Jun)
Accessories: none
Main specifications: W500×H52×D450mm 10kg
Taock SCB series sound creation board. Sandwich structure and special coating for high-density wooden boards, surface materials, and back materials centered around a honeycomb core containing cast iron powder. Spikes can be attached as an option. The unique vibration control structure greatly improves the sense of localization and sound field of sound. The exterior has scuffs, dents, felt on the bottom, etc. (Tamai Jun)
Accessories: none
Main specifications: W500×H52×D450mm 10kg
The price has been reduced. 2024/5/23 sales price 22,800 yen. Set of 4 large insulators The weight capacity is 60 kg, and the height can be adjusted by 7 mm. Please use it under the foot of a rotating device such as a record player. There is a feeling of use such as dirt (Takasaki Atsushi)
Accessories: none
Main specifications: load resistance 60 kg diameter 10 x height 50 mm weight 425 g per piece
The price has been drastically reduced. 2024/5/17 sales price 24,800 yen. Q ACOUSTICS 2-WAY BOOKSHELF. Once the setting is decided, you can enjoy a variety of music genres with a sense of scale that makes you doubt the size. There are dents around the upper corner on one side, and there is slight dullness throughout (Murakoshi Yoichi)
Maintenance information: 2024.5.16 sound output confirmed
Accessories: saran net, rubber feet
Main specifications: 2 way 6Ω 88dB W170 × H260 × D226 mm 4,6 kg
A rare item. Technics meter unit. 3 modes can be switched. One meter can be used properly for 3 types, making it extremely easy to use. It's a rare gem just for visually enjoying the sound. There are scratches and rust (Oikawa Tetsuji)
Maintenance information: 2024.5.29 Operation confirmed
Accessories: none
Main specifications: meter sensitivity 0 dBm 20 dBm switchable 3 system input switching W450 x H92 x D378 mm weight 5.3 kg
LUXMAN MC cartridge demagnetizer is easy to use. Plug in the cartridge shell, press the switch, and the 2 indicators go off, and you're done. *Never use MC cartridges or MM cartridges that use print coils. (FUJISAWA KOSHI)
Maintenance information: 2024.5.27 Operation confirmed
Accessories: original box
Main specifications: W120×H44×D56mm 250g
A rare item. Technics meter unit. 3 modes can be switched. One meter can be used properly for 3 types, making it extremely easy to use. It's a rare gem just for visually enjoying sound (Oikawa Tetsuji)
Maintenance information: 2024.5.29 Operation confirmed
Accessories: none
Main specifications: meter sensitivity 0 dBm 20 dBm switchable 3 system input switching W450 x H92 x D378 mm weight 5.3 kg