Hey I have a Beocenter 9000. The tape deck works pretty well however the audio if different on both channels. One channel has a lot more treble than the other one has. Is this a known issue? (could this have something to do with old capacitors and audio filtering?)
I tried audio from the AUX port and this seems to be fine.
More likely to be either the tape or the recording on it, dirt on the tapeheads and/or misalignment of the(autoreverse) head-rotating system.
While I've not owned a 9000 personally, it sounds like the bias is out of adjustment (tape head alignment) which is usually adjusted easily via a spring-loaded screw just below the tape head. Best adjusted while listening to the tape while it's playing- Assuming it's not the recording to dirty head as Martin points out.
Beocenter 9500, Beomaster 6500, Beolab Penta MKII, Beolab 5000, Beolab 3000, Beolab 4000 MKI, Beolab 4000 MKII, Beogram 3300, Beogram 3000, 2X Beolink 7000 RDS, 2X MCP 6500
Just cleaned the tape head another time and that seemed to be the problem. Thanks guys!