Hi All,
I made three way speakers, then tri-amp system.
As preamplifier I'm using Gemini PA-7000. Changed transformer, capacitors, BA4558 replaced by NE5532. Found 20% difference in channels output. Temporary 8 pin B20K potentiometer (broken in central loudness dent) replaced by B33K. Still 5-10% difference. Checked first NE on main board and difference was 2-4%(Vcc-14.7/Vcc+15.2). On the second NE5532 placed on Equalizer Board found x1, x10 difference in +/- inputs on left and right channel. Output difference was 15%. With small movement of treble or mid potentiometer the situation become better. Unfortunately there is no direct switch to bypass EQ.
Could You please help me with advise How to bypass EQ.
Thanks in advance
Rauf
I made three way speakers, then tri-amp system.
As preamplifier I'm using Gemini PA-7000. Changed transformer, capacitors, BA4558 replaced by NE5532. Found 20% difference in channels output. Temporary 8 pin B20K potentiometer (broken in central loudness dent) replaced by B33K. Still 5-10% difference. Checked first NE on main board and difference was 2-4%(Vcc-14.7/Vcc+15.2). On the second NE5532 placed on Equalizer Board found x1, x10 difference in +/- inputs on left and right channel. Output difference was 15%. With small movement of treble or mid potentiometer the situation become better. Unfortunately there is no direct switch to bypass EQ.
Could You please help me with advise How to bypass EQ.
Thanks in advance
Rauf
Attachments
Thank you very much Paul for quick response.
According your suggestion I will bypass second amp.
Do we loss any signal level in this case or EQ amp responsible only for EQ losses?
Output signal level is critical for me and idea was as in picture attached.
Thanks again
Rauf
According your suggestion I will bypass second amp.
Do we loss any signal level in this case or EQ amp responsible only for EQ losses?
Output signal level is critical for me and idea was as in picture attached.
Thanks again
Rauf
Attachments
Last edited:
