Say I have a preamp...

If you have an oscilloscope and a function generator or an audio oscillator, you can inject a 10Hz sine wave into the input of the preamp and follow it through the circuit. It's going to be hard without a schematic that would let you know how much gain to expect through each stage, but at least you could see if it is an easy modification or not.
If it were me, I'd inject a 10Hz signal into, say, the Aux input of either channel. Set your tone controls (if any) to flat. Set the volume control to max, then find the coupling capacitors that couple each gain stage to the next. Measure the signal on each side of the cap and see if it drops after the cap. Basically, I'd be looking for an R/C combo that is a high pass filter, and then do the math to lower the 3dB knee to 5 or 10 Hz.
 
premiumplus said:
If you have an oscilloscope and a function generator or an audio oscillator, you can inject a 10Hz sine wave into the input of the preamp and follow it through the circuit. It's going to be hard without a schematic that would let you know how much gain to expect through each stage, but at least you could see if it is an easy modification or not.
If it were me, I'd inject a 10Hz signal into, say, the Aux input of either channel. Set your tone controls (if any) to flat. Set the volume control to max, then find the coupling capacitors that couple each gain stage to the next. Measure the signal on each side of the cap and see if it drops after the cap. Basically, I'd be looking for an R/C combo that is a high pass filter, and then do the math to lower the 3dB knee to 5 or 10 Hz.
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I lost you after you said "If you have an..." I have none of that stuff or even understand what your saying! This is best left for others who know their shit for sure
 
Northwinds said:
Thanks Jason, really glad I could work a deal with the seller for it. As for a schematic, I have been spending th elast two hours looking. It seems Perreaux keeps that tightly classified. I think I read someone here or on AK actually got through to them and were most accommodating but I can't call New Zealand LOL

BD?
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Northwinds said:
Yep, over $3 a minute to call NZ
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I have access to toll free calling within New Zealand and Australia.
I will be able to make a phone call inquiry for you.
 
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The specs show 20-50,000 Hz±0.25db a very tight spec with extended high frequency response. With that kind of frequency response specified that unit will go down to below 5 Hz all day long. Do you need it lower than that?
 
8991XJ said:
The specs show 20-50,000 Hz±0.25db a very tight spec with extended high frequency response. With that kind of frequency response specified that unit will go down to below 5 Hz all day long. Do you need it lower than that?
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No he don't because the WOPL only goes to 10..
 
Skynyrd77 said:
No he don't because the WOPL only goes to 10..
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I've heard the WOPL will substitute for the controls of the TARDIS if you feed Lee enough Jelly Babies...
 
Skynyrd77 said:
Sry I was way off:thebirdman::iconbiggrin:
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Only your dog can hear that and would tell you what was wrong with Skynyrd's amps in that recording if he could speak.
 
I guess I won't bother then. I know it's a very good preamp as it is but would still be great to pick up the schematic just in case it does need work at some point in the future
 
Skynyrd77 said:
Theres no 800#??? What about a us dealer ?
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New Zealand is served by satellite and undersea cables...a toll-free call from US to NZ would bankrupt a bloke and you may not understand how an 800/toll-free number works.

It's just not feasible on their end and a strong quake can take out the cable and cause massive disruption to overseas service. It's happened before.

Perreaux Industries isn't going to be like calling Panasonic.
 
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orange said:
New Zealand is served by satellite and undersea cables...a toll-free call from US to NZ would bankrupt a bloke and you may not understand how an 800/toll-free number works.

It's just not feasible of their end and a strong quake can take out the cable and cause massive disruption to overseas service. It's happened before.

Perreaux Industries isn't going to be like calling Panasonic.
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You guys act like its impossible.. I don't belive that.. If I really need something I will fig it out. There is somebody to contact in the US that could help but ya got to try first. Easy to say I can't but more productive to say I can and fig it out. There's one out there Stephen . No 800# ok what about a email? What about another dealer for them. There is a way just got to find it ...
 
It's on the truck for delivery, Sally already looks to have a big grin on her face, I wonder how she knows? I have not said a word to her...

I figured out what was wrong with the volume knob on the Carver. It's a rubber grip thing that slides over the knob that was not seated properly and made the volume knob hard to turn. Turns smoothly now. The CT-24 is a good preamp overall, I really have no complaints with it other then a tuner being incorporated which I never used anyway. The volume ramps up quickly with it, faster then the C1. It's dead quiet and the Sonic Holography is a nice little feature on it, I could probably let it go but that would be after the modded NAD shows up here a friend snagged for me, have to have a backup
 
Northwinds said:
It's on the truck for delivery, Sally already looks to have a big grin on her face, I wonder how she knows? I have not said a word to her...

I figured out what was wrong with the volume knob on the Carver. It's a rubber grip thing that slides over the knob that was not seated properly and made the volume knob hard to turn. Turns smoothly now. The CT-24 is a good preamp overall, I really have no complaints with it other then a tuner being incorporated which I never used anyway. The volume ramps up quickly with it, faster then the C1. It's dead quiet and the Sonic Holography is a nice little feature on it, I could probably let it go but that would be after the modded NAD shows up here a friend snagged for me, have to have a backup
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You got a modd'ed NAD comin?
 
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