I own an Old Marantz CD Recorder (MARANTZ CDR630) with a Headphones Amp incorporated. Do I still need an amp? | Headphone Reviews and Discussion - Head-Fi.org
Marantz CDR630 Compact Disc Recorder Black with Rack Mount | eBay
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MARANTZ CDR-630 Professional CD Recorder + CD Player - from Dealer | eBay
Marantz CDR630 Compact Disc Recorder Black Rack Mount with Remote, Tested | eBay
Marantz CDR-630 Compact Disc Recorder | 288 EUR - Gebrauchte-Veranstaltungstechnik.de - Der Marktplatz für gebrauchte Veranstaltungstechnik