Sansui AU 555 Treble Too Sibilance After Service

[Sprungtol]

Hi
Last month my sansui AU 555 broke on left channel.
So i had it fixed by local service shop.
The result is bad.
The treble is way too sibilance and the bass has no dynamic punch.
The bass lacks of its "used to be" soft punches.
Any idea why does this happen ?
Thank you in advance

 

[Robisme]

Are you sure you have the speakers connected with correct polarity?

Rob

 

[Sprungtol]

I connected speakers' polarity correctly.
One of channel was still too sibilance.

Are you sure you have the speakers connected with correct polarity?

Rob

 

[slimecity]

Ensure your speakers have correct polarity and that the tweeter is working OK in both speakers. Ensure that the controls/switches are clean - try cleaning them with deoxit or similar.

See the "pre out", "main in" RCA sockets at the back? They should be connected by jumpers or RCA leads.

Turn the amplifier off and swap those jumpers/RCA leads to see if the problem stays in the same channel, or changes.

 

[Sprungtol]

Ah silly me !
Yes, looks like i connected wrong polarities.
Problem's solved.
Thank you, guys for the helpful advice.

Are you sure you have the speakers connected with correct polarity?

Rob

Ensure your speakers have correct polarity and that the tweeter is working OK in both speakers. Ensure that the controls/switches are clean - try cleaning them with deoxit or similar.

See the "pre out", "main in" RCA sockets at the back? They should be connected by jumpers or RCA leads.

Turn the amplifier off and swap those jumpers/RCA leads to see if the problem stays in the same channel, or changes.

 

[Robisme]

It happens. Glad you worked it out.

Rob