CAL Alpha and an Equalizer


Hi all, Hope you can please bear with me through this post to explain my findings, and a possible solution?

About 5-6 months ago, I bought a mint CAL Alpha DAC from another A-goner here, and have posted before, about its characteristics, and sound.

I don't believe there is anything specifically wrong with it per se, just typicaly Alpha sound.

Well, first thing I did notice when replacing my long owned CAL Sigma II DAC, was a very "lean" glassy, analytical, and very hot sound, like the DAC was hitting my Mac Pre-Amp a bit too much on the hot side.

I have bought a pair of Endler's 12 Step Attenuators, and that solved the hot output, but it still sounds a bit lean. Can an EQ be inserted between the DAC, and Pre-Amp? Mark
markd51
What tubes and output cables are you using? I have an Alpha and those two things really affect the sound in my system.
Hi, Thanks for your responses.
When I recieved the Alpha, there were two JAN-Phillips 5751 tubes, and those I replaced with two Mullard CV-4004 (12AX7A Equivalent) Tubes.

I'm using top of the line Straightwire 75ohm Digital vetween the Transport, and DAC , and Straightwire Maestro 1M Cables between DAC and Pre-Amp.
Both Power Cords are stock CAL Cords.

I am using the Endler Attenuators at the lowest 4db cut, and the output seems smoother, not so hot, but I remember the Sigma II giving a little bit better Bass response versus the Alpha.

The rest of my system sounds fine with no complaints of bass response though my Analog set up, and R-R Tape Deck.

I would assume that yes, a EQ could be inserted just between the DAC, and Pre-Amp, but as other would most likely say, it's a band aid trying to fix something that shouldn't need fixing in this manner, and another CD Player (or DAC) would better solve the problem. Mark
I have an Alpha and certainly wouldn't describe it as "hot" or "lean". I'm using Sylvania 5751 tubes. Previously I had JJ 12AU7 I think and it sounded good with them (but not as good as the 5751's). A long time ago I had the Mullards and absolutely did not like them.

I agree with the previous posters in that you should be looking at your tubes, and if the problem still persists, try a different DAC or CD player rather than adding confounding variables.

Michael
Hiend2, You stated the attenuators will upset the input impedance? I assume you mean the input impedence going into my preamplifier, correct?

Cann anyone else comment about this? I'll ask too, Scott Endler about this.

Then you say Hiend, "Get the Alpha"? Get the Alpha what??? lol Mark