Greetings All!
I just picked up a beautiful Beocenter 9500, my first B and O product. I brought it home to do initial testing of the unit, only to find that the Main Passive Speakers have NO output, the Secondary speakers have Left channel and a VERY faint Right channel. Headphone output is the same. Left Channel is good. VERY faint Right channel. (Basically sounds like an unamplified signal)
Before I tear into this thing, I want to reach out to the experts. I am thinking the muting relay is probably to blame for the dead main speakers, and possibly the STK IC for the Right channel issue. If you experts have any other ideas I would appreciate it.
Thanks! Oh, and the Powerlink sockets work with amplified speakers. No issue there.
Thank you to our Sponsors
Beocenter 9500 No Output / Weak Right Channel
7 replies
Hi and welcome to Beoworld! The BC9500 is a great first purchase.
First thing to check is simple: Are you sure that there isn't a 3.5mm to 1/4 inch adaptor in the headphone socket? Sounds silly but this mistake has been made many times in the past!
EDIT: But if the headphone output has the same problem this is unlikely - apologies!
Location: Warwickshire, UK
My B&O Icons:
Thanks! It really is beautiful. I saw it at the estate sale with a matching Beogram 9500 and had to have it. (Even though it was completely unneeded. LOL)
No adapter installed. I used a 1/4 inch plug to test my headphones. But I appreciate simple troubleshooting before tearing into a unit.
The muting relay is a likely suspect (trigger it on/off several times to see if there is any improvement).
Check if the "dummy plug" is installed in the LINE IN/OUT on the rear connections panel (if removed, the pre-amp signal won't be going to the main amp, although this wouldn't explain the partly working secondary speaker output...).
Also check the BALANCE adjustment.
Location: Helsinki - Finland
My B&O Icons:
"Bang & Olufsen - A Life Less Ordinary" // "It's not magic, it's the Bang & Olufsen link system" // "It takes more upon itself, asks less of you. And a natural consequence of this is the simple and striking design. The true harmony of form and function spells beauty in any language"
I triggered the "Mute" a few times, I didn't hear any clicks of a relay activating. As far as the Line In/Out plug, it is installed.
The Balance seems to operate correctly.
Thanks for the response.
Update: New relay at R1 installed and no change. Main L+R passive, no audio. Secondary R is good. L is weak.
Any ideas from experienced B and O techs?
Update:
Replaced TR22 and now the mains have audio. Main and Secondary Right Channel is GOOD. Main and Secondary Left channel is WEAK.
I am leaning towards an STK module. Do these regularly go bad?
Thanks!
Please Log In to Reply
You must be logged in as a BeoWorld member to post replies to forum threads.
or
Join BeoWorld
Register to access the forums, reference material, and exclusive member benefits — including our monthly prize draw.
Become a MemberDecember 2026 Prize Draw
Gold Members OnlyAs a Gold member you're automatically entered into our exclusive prize draw — your chance to win iconic Bang & Olufsen products. A unique benefit of BeoWorld Gold membership, every draw brings a new opportunity to win something special.
1st Prize
2nd Prize
3rd Prize