Up for sale is a beautiful Onkyo Grand Integra M-508 matching amp / Onlyo Grand Integra P-308 preamp set. 200 watts per channel and sounds absolutely incredible. Moving magnet and moving coil functions on the preamp. Awesome green VU meters. Very heavy and very well built. Back of amp needs a screw in speaker terminal. Few scratches here and there but overall in nice shape. No wood panels included. Units will be professionally packed, tracked, fully insured and delivered to your address within the lower 48 states. Cash local pickup also welcome in Long Island NY.

This is a reprint of an Audio Advertisement from 1987! The picture is of the actual item, Mint Condition! Very rare and hard to find! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Audio Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

DescriptionWe have 100% stock & Ready to ship!! This machine works with AC100V. Be sure to check the voltage in your country, as other voltages may cause malfunctions. Use a converter if the voltage is different. All accessories are as pictured. A stereo power amplifier that pursues a real-phase (digital) amplifier configuration that reproduces accurate phase and sound fields.The Integra M-508 uses an independent power supply system on the left and right sides. The phase characteristic of the amplifier is improved by installing two power in-phase transformers for L and R only.The power in-phase transformer also eliminates common-mode noise from the AC line.There are scratches, scuffs, dirt, etc. due to use. Operation has been confirmed. The green light is out.Please check the condition with the photo and video.PaymentVarious credit cards, Apple pay, Google Pay etc.ShippingWe ship by DHL or Fedex. It will be shipped within 1 business day and will arrive in about 3 days on average.Arriving Time is around 3-7 days to arrive.We are fastest delivery seller in Japan.Free Shipping Worldwide!Terms of SaleMoney back guarantee within 60 days if returned by customer.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.

ONKYO M-508 LED Integra Stereo Power Amplifier Vintage 200 WPC Tested for power only.The lament is peeling from the top right side.Please see the photos for details.This was donated to us and should be considered secondhand. ***Please consider that all items sold through our eBay store were donated to us.*** Communication Please feel free to contact us with any questions or concerns you may have regarding our active or completed listings. We will do our best to provide you the information you are looking for.Employees of The Salvation Army manage this eBay account Monday through Friday, 8:00am to 4:00pm EST. During these hours we are available to to answer questions and address customer concerns.Please send all communication via the eBay messaging system. About Us The Salvation Army Adult Rehabilitation Center provides spiritual, social and emotional assistance for men who have lost the ability to cope with their problems and provide for themselves. The program is offered free of charge to participants and focuses on rehabilitating the mind, body, and spirit. The center provides for the physical necessities of the men, as well as their emotional and spiritual needs. While in the program each man participants in a variety of therapies including individual, group, family and work; all in a clean, wholesome environment. The physical and spiritual care the program participants receive, prepares them to re-enter society and return to gainful employment. Many of those who have completed the program, are reunited with their families and resume a normal life. The center is funded solely by the sale of donated goods. The items we receive are sold in our Family Stores and through our eBay selling program. Each time you make a purchase from us, either here or in one of our Family Stores, you are helping to restore broken lives. Customer service is our top priority. If you make a purchase from us and an issue arises; please give us a chance to make things right by contacting us before leaving negative feedback or opening a case. We promise to resolve problems quickly and professionally. PAYMENT TERMS: eBay managed payments is the only method of payment we accept.In the event payment has not been received 5 business days after the auction has ended, we may relist the item and open an unpaid item caseWe do not end auctions early for Buy-it-Now offers SHIPPING TERMS: We are happy to offer combined shipping for listings ending on the same day. Please contact us after the auctions end to make arrangementsPayment must clear PayPal before an item will be shippedAll items are available for local pick-up, but payment must first be cleared via PayPalLocal pick-up is available 8am to 4pm Monday through Friday; please contact us to make arrangementsAll shipments come with delivery confirmationItems listed for Local Pick-up Only must be retrieved no later than 10 business days after payment is received, if any item is not retrieved in this time frame, the payment will be refunded and the buyer blocked from future auctionsWe will only ship to the address the buyer has registered with eBayCurrently, we only ship to the 48 contiguous United States. Listing and template services provided by inkFrog

DescriptionAll items are shown in the pictures. If you cannot tell from the pictures please contact us. Due to differences in region codes some games CDs DVDs etc. may not ?be available. The voltage of some electrical products may be different. Please make sure to check before purchasing. PaymentPlease pay within 2 days of winning the auction. Shipping There have been delays in delivery due to the global pandemic. There may be a significant delay in the scheduled delivery date. Delivery Time Economy delivery? 3 to 4 weeks (Tracking numbers are not reflected in Australia Canada and some regions.) Standard delivery 2 to 3 weeks Terms of Sale If payment is not confirmed within 2 days of purchase the order will be cancelled. Returns are accepted within 60 days.International Buyers - Please Note: Import duties and taxes are not included in the item price or shipping cost. Please check with your countrys customs office for additional costs before bidding or purchasing. Duties and taxes are not collected by the shipping company. Please check with your countrys customs office for additional costs before bidding or purchasing. The act of declaring goods at a lower value or declaring goods as gifts is prohibited by international governments. Shipping discounts are available for multiple purchases.We now accept more than just PayPal!Condition? MINT

DescriptionAll items are shown in the pictures. If you cannot tell from the pictures please contact us. Due to differences in region codes some games CDs DVDs etc. may not ?be available. The voltage of some electrical products may be different. Please make sure to check before purchasing. PaymentPlease pay within 2 days of winning the auction. Shipping There have been delays in delivery due to the global pandemic. There may be a significant delay in the scheduled delivery date. Delivery Time Economy delivery? 3 to 4 weeks (Tracking numbers are not reflected in Australia Canada and some regions.) Standard delivery 2 to 3 weeks Terms of Sale If payment is not confirmed within 2 days of purchase the order will be cancelled. Returns are accepted within 60 days.International Buyers - Please Note: Import duties and taxes are not included in the item price or shipping cost. Please check with your countrys customs office for additional costs before bidding or purchasing. Duties and taxes are not collected by the shipping company. Please check with your countrys customs office for additional costs before bidding or purchasing. The act of declaring goods at a lower value or declaring goods as gifts is prohibited by international governments. Shipping discounts are available for multiple purchases.We now accept more than just PayPal!Condition? MINT

Onkyo Integra M-508 Stromverstärker TransistorDas Datenblatt dieses Produkts wurde ursprünglich auf Englisch verfasst. Unten finden Sie eine automatische Übersetzung ins Deutsche. Sollten Sie irgendwelche Fragen haben, kontaktieren Sie uns.ZahlungSeien Sie versichert, dass unser Shop eine Vielzahl von Zahlungsmethoden anbietet.Bitte zahlen Sie innerhalb von 5 Tagen nach Auktionsende.Über unsWir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. Es ist uns eine Freude, Sie glücklich zu machen, indem wir Ihnen unseren empfohlenen Artikel vorschlagen.Wenn Sie Fragen oder Wünsche zu Artikeln haben, wenden Sie sich bitte an uns.Internationale Käufer – Bitte beachten Sie:-Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers.- Bitte erkundigen Sie sich vor dem Bieten/Kauf beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.-Diese Gebühren werden normalerweise von der ausliefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten.-Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten ein solches Verhalten.]]>Wir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. -Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. -Diese Gebühren werden normalerweise von der ausliefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten. -Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbiete Receiver Combo Features NA Number of Inputs NA Year Manufactured NA Audio Outputs NA Country/Region of Manufacture NA Unit Quantity NA Supported Modes NA Power NA Type NA Brand Onkyo Audio Inputs NA Compatible Product NA California Prop 65 Warning NA Number of Channels NA Number of Outputs NA Unit Type NA Country Japan UPC NA Manufacturer Warranty NA Model NA Surround Sound Formats NA Amplifier Class NA Features NA Color NA MPN NA

PaymentRest assured that our store offers a variety of payment methods.Please pay within 5 days after auction is finished. About UsWe are located in Japan.For electrical products check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. Its our pleasure to make you happy by proposing our recommend item.If you have any questions or request about items please feel free to ask us. International Buyers - Please Note:-Import duties taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility.-Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying.-These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.-We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior.>

Onkyo Integra M-508 Stereo StromverstärkerDas Datenblatt dieses Produkts wurde ursprünglich auf Englisch verfasst. Unten finden Sie eine automatische Übersetzung ins Deutsche. Sollten Sie irgendwelche Fragen haben, kontaktieren Sie uns.ZahlungSeien Sie versichert, dass unser Shop eine Vielzahl von Zahlungsmethoden anbietet.Bitte zahlen Sie innerhalb von 5 Tagen nach Auktionsende.Über unsWir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. Es ist uns eine Freude, Sie glücklich zu machen, indem wir Ihnen unseren empfohlenen Artikel vorschlagen.Wenn Sie Fragen oder Wünsche zu Artikeln haben, wenden Sie sich bitte an uns.Internationale Käufer – Bitte beachten Sie:-Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers.- Bitte erkundigen Sie sich vor dem Bieten/Kauf beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.-Diese Gebühren werden normalerweise von der ausliefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten.-Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbieten ein solches Verhalten.]]>Wir sind in Japan ansässig. Überprüfen Sie bei elektrischen Produkten den Hersteller und das Produkt und rechnen Sie die Spannung in das jeweilige Land um. Wir planen den Versand per FedEx oder DHL. Bitte kontaktieren Sie uns, da sich die Versandkosten in einigen Fällen ändern können. -Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. -Diese Gebühren werden normalerweise von der ausliefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten. -Wir kennzeichnen Warenwerte nicht unter dem Wert und kennzeichnen Artikel nicht als Geschenke. Die Vorschriften der US-amerikanischen und internationalen Regierung verbiete Receiver Combo Features NA Number of Inputs NA Year Manufactured NA Audio Outputs NA Country/Region of Manufacture NA Unit Quantity NA Supported Modes NA Power NA Type NA Brand Onkyo Audio Inputs NA Compatible Product NA California Prop 65 Warning NA Number of Channels NA Number of Outputs NA Unit Type NA Country Japan UPC NA Manufacturer Warranty NA Model NA Surround Sound Formats NA Amplifier Class NA Features NA Color NA MPN NA

PaymentRest assured that our store offers a variety of payment methods.Please pay within 5 days after auction is finished. About UsWe are located in Japan.For electrical products check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. Its our pleasure to make you happy by proposing our recommend item.If you have any questions or request about items please feel free to ask us. International Buyers - Please Note:-Import duties taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility.-Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying.-These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.-We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior.>

onkyo integra power amplifier M-508 AS ISShipping damage. Selling AS IS. No returns.Has cracked boards and damaged case. Wire is missing. Turns on but no sound. No returns.

DescriptionAll items are shown in the pictures. If you cannot tell from the pictures please contact us. Due to differences in region codes some games CDs DVDs etc. may not ?be available. The voltage of some electrical products may be different. Please make sure to check before purchasing. PaymentPlease pay within 2 days of winning the auction. Shipping There have been delays in delivery due to the global pandemic. There may be a significant delay in the scheduled delivery date. Delivery Time Economy delivery? 3 to 4 weeks (Tracking numbers are not reflected in Australia Canada and some regions.) Standard delivery 2 to 3 weeks Terms of Sale If payment is not confirmed within 2 days of purchase the order will be cancelled. Returns are accepted within 60 days.International Buyers - Please Note: Import duties and taxes are not included in the item price or shipping cost. Please check with your countrys customs office for additional costs before bidding or purchasing. Duties and taxes are not collected by the shipping company. Please check with your countrys customs office for additional costs before bidding or purchasing. The act of declaring goods at a lower value or declaring goods as gifts is prohibited by international governments. Shipping discounts are available for multiple purchases.We now accept more than just PayPal!Condition? MINT

BeschreibungWir haben 100 % Lagerbestand und sind versandbereit!! Alle Zubehörteile sind wie abgebildet. ?Alle Ein-/Ausgangsanschlüsse, Schalter, Messgeräte und Funktionen funktionieren einwandfrei. Spielt einen sehr klaren Klang.?Wir überprüfen den Betrieb, indem wir 3 Tage lang mindestens 3 Stunden lang Ton von allen Terminals ein- und ausgeben.?Wir haben außerdem bestätigt, dass alle Lautstärke- und Schalterfunktionen funktionieren und es keine Rinne gibt.?Es handelt sich um einen Vintage-Audioverstärker. ?Die Frontplatte wurde durch eine LED ersetzt.Bitte überprüfen Sie den Zustand anhand des Fotos und Videos.ZahlungDiverse Kreditkarten, Apple Pay, Google Pay etc.VersandWir versenden per DHL oder Fedex. Der Versand erfolgt innerhalb eines Werktages und die Lieferung erfolgt durchschnittlich in etwa 3 Tagen.Die Ankunftszeit beträgt ca. 3–7 Tage.Wir sind der schnellste Lieferverkäufer in Japan.Weltweit versandkostenfrei!VerkaufsbedingungenGeld-zurück-Garantie innerhalb von 60 Tagen bei Rückgabe durch den Kunden.Internationale Käufer – Bitte beachten Sie:Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. Bitte erkundigen Sie sich vor dem Bieten oder Kaufen beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.

DescriptionWe have 100% stock & Ready to ship!! All accessories are as pictured. ?All input/output terminals, switches, meters, and functions work perfectly. Plays a very clear sound.?We check the operation by inputting and outputting sound from all terminals for 3 hours or more a day for 3 days.?We have also confirmed that all the volume and switches work and there is no gully.?It is a vintage audio amplifier. ?The front panel has been replaced with an LED.Please check the condition with the photo and video.PaymentVarious credit cards, Apple pay, Google Pay etc.ShippingWe ship by DHL or Fedex. It will be shipped within 1 business day and will arrive in about 3 days on average.Arriving Time is around 3-7 days to arrive.We are fastest delivery seller in Japan.Free Shipping Worldwide!Terms of SaleMoney back guarantee within 60 days if returned by customer.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.

onkyo integra power amplifier M-508. Seems to play fine. Selling as is due to age.

DescrizioneAbbiamo il 100% di stock e pronto per la spedizione!! Tutti gli accessori sono come nella foto. ?Non ci sono accessori. Il cavo di alimentazione è collegato direttamente allunità principale.?Tutti i terminali di ingresso/uscita, gli interruttori, i misuratori e le funzioni funzionano perfettamente.?Riproduce un suono molto chiaro.? Laspetto è bello, ma nel complesso ci sono piccoli graffi e opacità.Puliamo sia allinterno che allesterno.?La lampada del misuratore, la parte della portata del misuratore, la lampada pilota, ecc. sono stati sostituiti con lampade a LED.Si prega di controllare le condizioni con la foto e il video.PagamentoVarie carte di credito, Apple Pay, Google Pay ecc.SpedizioneSpediamo tramite DHL o Fedex. Verrà spedito entro 1 giorno lavorativo e arriverà in media in circa 3 giorni.Il tempo di arrivo è di circa 3-7 giorni per arrivare.Siamo il venditore di consegna più veloce in Giappone.Spedizione gratuita in tutto il mondo!Condizioni di venditaGaranzia di rimborso entro 60 giorni se restituito dal cliente.Acquirenti internazionali - Nota:I dazi doganali, le tasse e le spese non sono inclusi nel prezzo dellarticolo o nel costo di spedizione. Queste spese sono a carico dellacquirente. Si prega di verificare con lufficio doganale del proprio paese per determinare quali saranno questi costi aggiuntivi prima dellofferta o dellacquisto.

DescriptionNous avons 100% de stock et prêt à expédier !! Tous les accessoires sont comme sur la photo. ?Il ny a pas daccessoires. Le cordon dalimentation est connecté directement à lunité principale.?Tous les terminaux dentrée/sortie, les commutateurs, les compteurs et les fonctions fonctionnent parfaitement.? Joue un son très clair.?Lapparence est belle, mais il y a de fines rayures et de la matité dans lensemble.Nous nettoyons aussi bien lintérieur que lextérieur.?La lampe du compteur, la partie de la plage du compteur, la lampe pilote, etc. ont été remplacés par des lampes LED.Veuillez vérifier létat avec la photo et la vidéo.PaiementDiverses cartes de crédit, Apple Pay, Google Pay, etc.ExpéditionNous expédions par DHL ou Fedex. Il sera expédié sous 1 jour ouvrable et arrivera dans environ 3 jours en moyenne.Le temps darrivée est denviron 3 à 7 jours pour arriver.Nous sommes le vendeur de livraison le plus rapide au Japon.Envoi gratuit dans le monde entier!Conditions de venteGarantie de remboursement sous 60 jours en cas de retour par le client.Acheteurs internationaux - Veuillez noter :Les droits dimportation, les taxes et les frais ne sont pas inclus dans le prix de larticle ou les frais dexpédition. Ces charges sont sous la responsabilité de lacheteur. Veuillez vérifier auprès du bureau de douane de votre pays pour déterminer quels seront ces coûts supplémentaires avant denchérir ou dacheter.

BeschreibungWir haben 100 % Lagerbestand und sind versandbereit!! Alle Zubehörteile sind wie abgebildet. ?Es gibt kein Zubehör. Das Netzkabel wird direkt an das Hauptgerät angeschlossen.?Alle Ein-/Ausgangsanschlüsse, Schalter, Messgeräte und Funktionen funktionieren einwandfrei.?Spielt einen sehr klaren Klang.?Das Aussehen ist schön, aber es gibt insgesamt feine Kratzer und Mattheit.Wir reinigen sowohl innen als auch außen.?Die Messgerätlampe, der Messbereichsteil, die Kontrolllampe usw. wurden durch LED-Lampen ersetzt.Bitte überprüfen Sie den Zustand anhand des Fotos und Videos.ZahlungDiverse Kreditkarten, Apple Pay, Google Pay etc.VersandWir versenden per DHL oder Fedex. Der Versand erfolgt innerhalb eines Werktages und die Lieferung erfolgt durchschnittlich in etwa 3 Tagen.Die Ankunftszeit beträgt ca. 3–7 Tage.Wir sind der schnellste Lieferverkäufer in Japan.Weltweit versandkostenfrei!VerkaufsbedingungenGeld-zurück-Garantie innerhalb von 60 Tagen bei Rückgabe durch den Kunden.Internationale Käufer – Bitte beachten Sie:Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. Bitte erkundigen Sie sich vor dem Bieten oder Kaufen beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.

DescriptionWe have 100% stock & Ready to ship!! All accessories are as pictured. ?There are no accessories. The power cord is connected directly to the main unit.?All input/output terminals, switches, meters, and functions work perfectly.?Plays a very clear sound.?The appearance is beautiful, but there are fine scratches and dullness on the whole.We clean both inside and outside.?The meter lamp, meter range part, pilot lamp, etc. have been replaced with LED lamps.Please check the condition with the photo and video.PaymentVarious credit cards, Apple pay, Google Pay etc.ShippingWe ship by DHL or Fedex. It will be shipped within 1 business day and will arrive in about 3 days on average.Arriving Time is around 3-7 days to arrive.We are fastest delivery seller in Japan.Free Shipping Worldwide!Terms of SaleMoney back guarantee within 60 days if returned by customer.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.

Onkyo Grand Integra Power Amp (M508) and Grand Integra Pre Amp (P308), both made in Japan. This auction is for both items together. The power amp is super chunky and heavy. Even if I could lift this beast, I would not be able to pack it securely for shipping. However, I am happy to deliver to central Scotland if that helps. My inability to lift it accounts for the less than great photos. Both pieces are working, look fresh and shiny, and were the pride and joy of my late husband. He had the power amp rebuilt in 2015 and the preamp serviced at the same time. He mentioned something about the light not working correctly on the display so I have some onkyo lightbulbs he purchased to accompany the pieces. I know nothing about all the qualities of the M508 (dual mono amps) but it was the main amp on his desk and I have tested both items with a TEAC CD player and Goodmans Achromat speakers today. When you switch on the power amp the display lights in the front windows start as red and then change to green (Im assuming this is normal). Any questions then please ask.