Hot Rodding an Ashly X-Over

docaudio · 30th May 2008, 03:45 PM

I've been working on cleaning up an older Ashley XR2001 crossover that I use for my mains to divert everything below 60Hz to the Sub. I've attached a schematic and have swapped out the opamps for LM4562s.
I also had to change the voltage regulators to + 15v.
Here are some initial observations:
Things are much quieter than before, but I'm getting a bit of 'rocky-spity' noise. Someone is not happy.
Also, the sound is a bit brittle. I'd really like to either remove or at least improve the coupling caps (c20,40,45,50,73,76,77)
Any other suggestions would by greatly appreciated.
I know there are probably better choices for opamps, but they were available.
Thanks,
Bill

docaudio · 30th May 2008, 08:28 PM

The TL072s listed on the schematic are actually 4560s...
The 2043s are correct.
-Bill

docaudio · 3rd June 2008, 11:25 PM

Bump..
Should this get moved to Analog?

econofi · 8th May 2011, 08:09 AM

Did you ever get more suggestions about this? I have an Ashly XR2001, too. While I love the ease of use and versatility, it is a tad noisy and the deep bass drive is not that great. I suspect the 20Hz high-pass is the culprit, but it could be power supply or caps. I'd like to lower the effective output to 10Hz or even 5Hz if the system stays stable.

Also, although I doubt I could hear it, all those potentiometers have to subtract something. Stepped attenuators instead?

This is such a well-built and well-conceived device at such a bargain price, there should be lots of mods for it. Maybe everyone went digital, but I'm not ready yet.

Paul

30th May 2008, 08:28 PM	#2
docaudio diyAudio Member Join Date: May 2008	Correction... The TL072s listed on the schematic are actually 4560s... The 2043s are correct. -Bill __________________ Wish I had 5.1 ears...

3rd June 2008, 11:25 PM	#3
docaudio diyAudio Member Join Date: May 2008	Bump.. Should this get moved to Analog? __________________ Wish I had 5.1 ears...

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8th May 2011, 08:09 AM	#4
econofi diyAudio Member Join Date: May 2011 Location: Baton Rouge USA	Did you ever get more suggestions about this? I have an Ashly XR2001, too. While I love the ease of use and versatility, it is a tad noisy and the deep bass drive is not that great. I suspect the 20Hz high-pass is the culprit, but it could be power supply or caps. I'd like to lower the effective output to 10Hz or even 5Hz if the system stays stable. Also, although I doubt I could hear it, all those potentiometers have to subtract something. Stepped attenuators instead? This is such a well-built and well-conceived device at such a bargain price, there should be lots of mods for it. Maybe everyone went digital, but I'm not ready yet. Paul

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