Adcom GFA-860II Pre-Amp - Skipping in CD's
vbovine -- Sun, 03/05/2006 - 22:00
I purchased an Adcom 860II pre-amp in early January with an Adcom 7605 amp. Shortly after I discovered that my new Denon 1920 DVD/CD player was skipping when I played a CD. The music never starts on the first tracking number of a given track. Example: The vocal blasts less than a second than starts playing a counter or two (002-003) into a song which is very annoying. My connection from the DVD/CD player is optical into the Adcom pre-amp. To validate it was the new DVD/CD player I hooked up my old CAL DX-1 CD player using the coxial connection into my digital inputs on the pre-amp and the same thing happened. I concluded the problem was with my pre-amp. I checked and rechecked all my connections and setup commands. All okay.
I called Adcom and they told me the pre-amp needs time to id the digital. signal? I felt this was not correct since (1) I told the amp the siginal by idenifying it during setup (digital via the optical connection) and (2) it was happening on the CD's between musical tracks on any CD digital or analog. When I called Adcom again they told me they would look into an engineering fix.
I tried analog connections for both the DVD/CD and the CD player's and they work fine but I want a digital signal to work since the music sounds of a higher quality to me when digital.
Does anyone know the cause of the problem and how to fix the problem?.
vj :(
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Just noticed your problem. I purchased a GTP -860 II in 2006 with a very similar problem and posted it on the ADCOM Review website. Like you I have both 6 channel analog and optical digital inputs. No sound output occurs for the first second of every track (clipping) when I select 5 channel stereo ouput for a standard CD with digital input. No problem occurs with two channel output with either digital or analog input. The unit will not let me select 5 channel stereo output for 6 channel analog input - an annoying limitation.
The clipping problem goes away when I disconnect the analog inputs leaving only the optical digital input. I concluded that the unit is searching for the digital input signal and hence the delay in sound output.
Yes, the clipping problem is very annoying.