Steve, Are you using a consumer pre-amp direct to the DCX2496 input?
Could you give me schematic of a suitable output attenuator?
Marshall.
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Steve, Are you using a consumer pre-amp direct to the DCX2496 input?
Could you give me schematic of a suitable output attenuator?
Marshall.
OK, got the manual. The preamp outs are indeed after the volume, balance and tone controls. Good!
Just wondering how much gain and headroom the "flat amp" section of the preamp has. That's Q201, Q202 on the left channel.
I run digital to the dcx.Quote:
Originally Posted by mah
For the attenuator...this might be wrong...just threw it together.
Maybe the guys here could review it but it should look something like this:
http://www.hostboard.com/forums/hbmc...2010/09/42.jpg
Yeah Steve, that will work and is pretty much what I've done in the past.
Fortunately Marshall dos not need the attenuation, as he is going into integrated amps with volume control. So he need only connect to pin 2 (hot) and pin 1 (earth). A 50K resistor could go from pin 3 to ground as a "courtesy" to the op amp that drives that pin. Might reduce noise a tiny bit - or not.
If Marshall can measure the gain of his Sony preamp, then we will be doing great!
Nice drawing Steve. Bal/unbal conversion and pad in it's simplest form.
The old Altec letter;
http://alteclansingunofficial.nlenet.net/publications/techletters/TL_133.pdf
gives the values and formulas for level pads. Note the use of dBm for reference. a power-referenced unit (expessed in mW) that assumes ~matched impedances for maximum power transfer. (That was the good ol' days where such things were important). Now, with the gear you encounter having I/O Z all over the map, we just throw extra power at it and burn off the waste. For that, the voltage referance units of dBv and dBu prevail.
Thanks, guys, for your help.
I am now happy to purchase a CX3400 or a DCX2496. Now to decide which one.
Regards, Marshall.
It basically simple (CX) vs flexible (DCX).
Agree. At a cost($s) of course. The DCX2496 is tempting.
By the way, I came across this. It may be of interest to DCX2496 users.
Expanded Soundstaging and 3D-Imaging
One man's overview of his DCX2495.
Balanced Three Way System
Great thread on active crossovers and the DCX2496, in particular. I was contemplating this same purchase so it's very timely.Quote:
Originally Posted by mah
I have been using the CX-3400, using a Yamaha C2a preamp, Pass F5 or other amps for highs, and a JBL/UREI power amp on the lows, driving Altec 802g and 416b. I was not experiencing any noise through the crossover at any listening levels. I was using combinations of balanced/unbalanced terminations. This has been my first go at using an active crossover and I see no reason to change, the active system delivers.
Besides the additional functions of the DCX2496, is there any difference in sound quality compared to the CX3400?