"Chris Morriss" wrote in message
...
In message , Jim Lesurf

The DEQ2496 does offer a lot for the money and is a well known unit.

I would be wary of the SNR at the outputs though. My hearing is not at
all good any more, but the noise level when using one of these at low
output levels is not really adequate. The solution is to follow the unit
with a multi-channel analogue gain control (rather than using the internal
digital gain control), so that the crossover is working at a high internal
signal level.

I would say that a little different - the goal is to have the output of the
crossover working at a high level.

Inside the box, the digital data path is 24 bits wide, and you have misset
levels by a mile to have noise there.

At the output of the box, the transition into the digital domain is
designed, per pro standards, for FS = approximately 10 volts RMS (+22 dBu)

Most power amps have input sensitivities below 2 volts for full output, so
approximately 16 dB worth of available dynamic range are lost. The unit has
approximately 110 dB dynamic range, so losing 16 dB puts you down at 94 dB
which still isn't all that bad if you actually set levels that way. Many
people miss that goal.

Or, simply have power amps that have input level controls.

Four-way log pots are easily available, but for more ways you might have
to have a look at some of the kits that use Analog Devices digital pot
chips. I can vouch for the quality of these chips, as I use them in my PA
and VA amplifier designs for my employer.

Stepped attenuators will suffice, as will hand-built ones.