DescriptionCondition : AS-ISOperation confirmed. Thank you for looking. [Product]Beyerdynamic A1 Premium Headphone Amplifier [Operation/Condition (Overview)]Operation confirmed. [Appearance]No noticeable scratches, in good condition. [Set Contents]- Main unit- Power cord [Specifications]- Size: 250 (width) x 50 (height) x 225 (depth) mm This product is an authentic product sold in Japan. Please be assured that we package each item carefully without causing damage. Shipping We send a product with careful packing. After confirm your payment, Well ship this item within 5 business days. (except for Saturday, Sunday and national holiday in JAPAN) Weekends are not available because FedEx or DHL are closed. Returns This product has not been tested. Therefore, returns cannot be accepted. Please understand this before purchasing. About us Thank you for your seeing our page. Please feel free to question if there is an uncertain point on this page. We cordially answer it. International Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. Thank you for your understanding.

Der beyerdynamic A1 Kopfhörerverstärker bietet eine erstklassige Audioleistung für anspruchsvolle Kopfhörer. Mit Stereo L/R RCA Audioeingängen und einem Ausgang ist er vielseitig einsetzbar und liefert ein beeindruckendes Klangbild. Gebrauchspuren sind auf der Oberfläche zu sehen. Der Kopfhörerverstärker ist gebraucht. Die Ware wird unter Ausschluss jeglicher Gewährleistung verkauft. Keine Rücknahme und Garantie.

beyerdynamic Headphone Amplifier A1 German used Confirmed Operation w/boxDescriptionItem Condition : UsedVery Good!beyerdynamic Headphone Amplifier A1 made in Germany Up for sale is a used beyerdynamic Headphone Amplifier A1. Working, beautiful, with original box, everything in the photos.Shipping Handling Time: 5 business days We will ship your item on week day from Japan. Standard Shipping with tracking number by FedEX or DHL or Japan post. We will ships within 5 business days after receiving cleared payment. ?Business days are not include Saturday, Sunday and National holidays.PackageWe pack items carefully and send them from Japan prompthy. You should have no concern about shipment. International Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. Thank you for your understanding.

Please feel free to ask any questions you may have. Notes Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. If you are in remote area it might cost you remote fees addition so please check beforehand. Shipping Handling time 2-10 days after payment DHL,Fedex,EMS Return You can return in 30 days Return cost will be buyers responsibility.

Very good condition.

beyerdynamic Headphone Amplifier A1 German Has some scratches on the outside. Does not come with original cord, I am providing a cord that powers it on but is not the original. I have powered it on, otherwise untested.

This item is USED in GOOD working condition. This listing includes all items pictured in listing photos ONLY.Please view listing photos for further condition details.

beyerdynamic Headphone Amplifier A1 German Has some scratches on the outside. Does not come with original cord, I am providing a cord that powers it on but is not the original. I have powered it on, otherwise untested.

Beyerdynamic Kopfhörer VerstärkerModell A1 AZ Toller Kopfhörer Verstärker mit 2 Cinch Eingängen/Kanälen und einem Cinch Ausgang Voll funktionsfähigGuter Zustand, leichte Gebrauchsspuren auf der Oberseite und auf der Gummi Umrandung, nichts Wildes, alles im üblichen Rahmen - siehe BilderVolumenregler läuft geschmeidig, alles so wie es soll Lieferumfang ist der Verstärker und das Netzteil Privatverkauf ohne Gewährleistung und Rücknahme

Assembled Headphone Amplifier Board Compared with the commonly reproduction of Beyerdynamic A1, we improved: using class-A series type of voltage regulator to provide more silent power supply. Integrated earphone protection circuit. total 4 MOSFETs for for power output. Use double op amp design, double op amp per channel, with higher channel separation. all-in-one design, single-point grounding, ground resistance is close to the 0.02 ohm resistance value, low noisedesign. PCB is small and flexible, more suitable for all kinds of chassis installation. More cost-effective sound modification plan. PCB SIZE:127 x 152MM Power requirements: AC?15-0-15?~?18-0-18V?,I ?0.5A; Best:AC 15-0-15; I=1A Product configuration Finished board: Based on the well-tested board on the standard version kit, we verified all key points' voltage, and used the signal generator and oscilloscope for analog waveform double verification. We will not use this board for listening test. All finished pcbs are all carefully hand-soldered and fully tests. Schematic & key point of debugging.

Assembled Headphone Amplifier Board Compared with the commonly reproduction of Beyerdynamic A1, we improved: using class-A series type of voltage regulator to provide more silent power supply. Integrated earphone protection circuit. total 4 MOSFETs for for power output. Use double op amp design, double op amp per channel, with higher channel separation. all-in-one design, single-point grounding, ground resistance is close to the 0.02 ohm resistance value, low noisedesign. PCB is small and flexible, more suitable for all kinds of chassis installation. More cost-effective sound modification plan. PCB SIZE:127 x 152MM Power requirements: AC?15-0-15?~?18-0-18V?,I ?0.5A; Best:AC 15-0-15; I=1A Product configuration Finished board: Based on the well-tested board on the standard version kit, we verified all key points' voltage, and used the signal generator and oscilloscope for analog waveform double verification. We will not use this board for listening test. All finished pcbs are all carefully hand-soldered and fully tests. Schematic & key point of debugging.

Assembled Headphone Amplifier Board Compared with the commonly reproduction of Beyerdynamic A1, we improved: using class-A series type of voltage regulator to provide more silent power supply. Integrated earphone protection circuit. total 4 MOSFETs for for power output. Use double op amp design, double op amp per channel, with higher channel separation. all-in-one design, single-point grounding, ground resistance is close to the 0.02 ohm resistance value, low noisedesign. PCB is small and flexible, more suitable for all kinds of chassis installation. More cost-effective sound modification plan. PCB SIZE:127 x 152MM Power requirements: AC?15-0-15?~?18-0-18V?,I ?0.5A; Best:AC 15-0-15; I=1A Product configuration Finished board: Based on the well-tested board on the standard version kit, we verified all key points' voltage, and used the signal generator and oscilloscope for analog waveform double verification. We will not use this board for listening test. All finished pcbs are all carefully hand-soldered and fully tests. Schematic & key point of debugging.

Beyerdynamic A1 Headphone Amplifier, tested and working. A few minor scuffs, as pictured, and comes with a replacement power cord. Made in Germany.

beyerdynamic Headphone Amplifier A1 German Has some scratches on the outside. Does not come with original cord, I am providing a cord that powers it on but is not the original. I have powered it on, otherwise untested.

Eingangsimpedanz 50 k?, Maximalverstärkung 18 dB, Frequenzgang 1 Hz – 100 kHz (-1 dB), Klirrfaktor 0,001 % bei 170 mW/ 250 ?, Kanaltrennung > 89 dB, Ausgangsleistung: 100 mW / 600 ?, 170 mW / 250 ?, 150 mW / 30 ?, Fremdspannungsabstand >100 dB Ausgangsimpedanzen Line Out (je nach vorgeschaltetem Gerät) 100 ? Kopfhörerausgang, Leistungsaufnahme < 15 W über internes geregeltes Netzteil, Abmessungen 250 x 225 x 50 mm (Gehäusemaße mit Rahmen) Anschlüsse (Audio) Kopfhörerbuchse mit vergoldeten Kontakten 1 Line Ausgang 2 Audio-Eingänge über vergoldete Cinchbuchsen Netzteil 220 - 240 V/ 50 - 60Hz Gewicht ca. 2,3 kg

beyerdynamic Headphone Amplifier A1 German. Used, good working condition, minor cosmetic wear, please refer to pictures.