M-504 in excellent condition. It looks like it spent its life in a box, none of the usual layers of thick dust, it is very clean inside too. Great unit to own. Couple of things worth noting: There are a few scratches/scuffs that I have noted with my finger pointing or a green arrow showing it, please see photos. Following was done in preparation to sell:ServicedTestedBias setDC off-set checked Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps Installed new custom real wood panels. (Dark Jamoca color) I have the OEM panels for this model too, I can sell them separately to you if you want. I have 2 custom colors, light Jamoca and Dark Jamoca. choose which ones you want. I have photos of both finishes. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired. All original! Please specify if you want the installed Darker Wood panels or OEM or Light Jamoca.

M-504 in excellent condition. It looks like it spent its life in a box, none of the usual layers of thick dust, it is very clean inside too. Very nice unit to own. Couple of things worth noting: There are a few scratches/scuffs that I have noted with my finger pointing or a green arrow showing it, please see photos. Following was done in preparation to sell:ServicedTestedBias setDC off-set checked Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps Installed new custom real wood panels. (Dark Jamoca color) I have the OEM panels for this model too, I can sell them separately to you if you want. I have 2 custom colors, light Jamoca and Dark Jamoca. choose which ones you want. I have photos of both finishes. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired. All original! Please specify if you want the installed Darker Wood panels or OEM or Light Jamoca.

M-504 in excellent condition. It looks like it spent its life in a box, none of the usual layers of thick dust, it is very clean inside too. Very nice unit to own. Couple of things worth noting: There are a few scratches/scuffs that I have noted with my finger pointing or a green arrow showing it, please see photos. Following was done in preparation to sell:ServicedTestedBias setDC off-set checked Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps Installed new custom real wood panels. (Dark Jamoca color) I have the OEM panels for this model too, I can sell them separately to you if you want. I have 2 custom colors, light Jamoca and Dark Jamoca. choose which ones you want. I have photos of both finishes. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired. All original! Please specify if you want the installed Darker Wood panels or OEM or Light Jamoca.

M-504 in excellent condition. It looks like it spent its life in a box, none of the usual layers of thick dust, it is very clean inside too. Very nice unit to own. Couple of things worth noting: There are a few scratches/scuffs that I have noted with my finger pointing or a green arrow showing it, please see photos. Following was done in preparation to sell:ServicedTestedBias setDC off-set checked Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps Installed new custom real wood panels. (Dark Jamoca color) I have the OEM panels for this model too, I can sell them separately to you if you want. I have 2 custom colors, light Jamoca and Dark Jamoca. choose which ones you want. I have photos of both finishes. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired. All original! Please specify if you want the installed Darker Wood panels or OEM or Light Jamoca.

M-504 in excellent condition. It looks like it spent its life in a box, none of the usual layers of thick dust, it is very clean inside too. Very nice unit to own. Couple of things worth noting: There are a few scratches/scuffs that I have noted with my finger pointing or a green arrow showing it, please see photos. Following was done in preparation to sell:ServicedTestedBias setDC off-set checked Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps Installed new custom real wood panels. (Dark Jamoca color) I have the OEM panels for this model too, I can sell them separately to you if you want. I have 2 custom colors, light Jamoca and Dark Jamoca. choose which ones you want. I have photos of both finishes. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired. All original! Please specify if you want the installed Darker Wood panels or OEM or Light Jamoca.

M-504 in excellent condition. It looks like it spent its life in a box, none of the usual layers of thick dust, it is very clean inside too. Very nice unit to own. Couple of things worth noting: There are a few scratches/scuffs that I have noted with my finger pointing or a green arrow showing it, please see photos. Following was done in preparation to sell:ServicedTestedBias setDC off-set checked Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps Installed new custom real wood panels. (Dark Jamoca color) I have the OEM panels for this model too, I can sell them separately to you if you want. I have 2 custom colors, light Jamoca and Dark Jamoca. choose which ones you want. I have photos of both finishes. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired. All original! Please specify if you want the installed Darker Wood panels or OEM or Light Jamoca.

M-504 in excellent condition. It looks like it spent its life in a box, none of the usual layers of thick dust, it is very clean inside too. Very nice unit to own. Couple of things worth noting: There are a few scratches/scuffs that I have noted with my finger pointing or a green arrow showing it, please see photos. Following was done in preparation to sell:ServicedTestedBias setDC off-set checked Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps Installed new custom real wood panels. (Dark Jamoca color) I have the OEM panels for this model too, I can sell them separately to you if you want. I have 2 custom colors, light Jamoca and Dark Jamoca. choose which ones you want. I have photos of both finishes. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired. All original! Please specify if you want the installed Darker Wood panels or OEM or Light Jamoca.

M-504 in Immaculate condition. Amazing condition, see photos. I cannot call something this old as MINT, but if there was a grade for used gear, this would be up there with the best! Following was done in preparation to sell: ServicedTestedBias setDC off-set checkedMeters Calibrated Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn-out lamps 5 way PREMIUM gold plated Banana speaker posts installed on both Speaker A and B. This unit looks VERY clean on the inside, Little to no dust or corrosion, it really looks very good.!

M-504 in excellent condition. Couple of things worth noting: The previous owner scratched some number on the top (see in photo). Its not blaring, but at certain angles visible. The other thing I noted, on the top left corner of the left meter, the glass is chipped a little. You have to bend down and look up to notice it, otherwise you would not know. Following was done in preparation to sell: ServicedTestedBias setDC off-set checkedMeters Calibrated Additionally, the following upgrades/ refreshes have been done:Green LED kit replaces the worn out lamps 5 way Banana speaker posts installed on both Speaker A and B. This unit has all factory OEM outputs and drivers, does not look like the amplifier section been repaired.

Very clean, working Onkyo M504 power amplifier. Fully checked out, love the sound of this amplifier. Rated 165w/channel @ 8 ohms, seems for powerful. Love those big meters! Comes with factory manual.Sold as is as with all electronics.

Very clean, working Onkyo M504 power amplifier. Fully checked out, love the sound of this amplifier. Rated 165w/channel @ 8 ohms, seems for powerful. Love those big meters! Comes with factory manual.Sold as is as with all electronics.

Onkyo Integra M504. Plays fine. Selling as is due to age.