Amp Camp Amp - ACA

[Kokanee]

Thanks for all the help guys. I guess my questions have been answered. I will use the sinks when I begin the build.

Regards

 

[Eric]

OK if I paint them black using automotive heat paint.

No problem with paint, just keep the paint layer thin. I've painted a number of raw aluminum sinks and used them for amps like ACA, M2, Aleph-J and MoFo.

 

[Kokanee]

Thanks Eric, my thoughts exactly. A nice even thin coat.

MM

 

[Dneu2011]

Hoping to get some help for a friend that now has 5 amp camps and attempting to run his Klipsch Jubilee HF (horns only) on balanced XLR. At first, he was running two amp camps in stereo but tried balanced expecting higher output on his 8 ohm horns but he is getting 5db less vs running RCA bridged. Does anyone know why this is? I checked wiring multiple times and it’s correct. Below is his setup.


Marantz 7703 XLR outs using MOGAMI XLR cables
..into XILICA XP- 4080. DSP signal processors. XLR outs to ACA amps

 

[Zen Mod]

that pictures you attached looks pretty pale to me

try uploading them again

🙂

 

[Dneu2011]

Below are a couple of pictures. If more are needed, let me know.

 

[planet10]

… Klipsch Jubilee HF (horns only)...

What does the impedance look like?

dave

 

[Dneu2011]

What does the impedance look like?

dave

Attached is a picture of the horn.

 

[Extreme_Boky]

Some info here... could not find any official info on impedance vs. frequency.

Jubilee Passive Crossovers - Technical/Modifications - The Klipsch Audio Community

 

[planet10]

The horn will affect the impedance, but from the driver impedance it shouldn’t be an issue with the load impedance.

dave

 

[phomchick]

Hoping to get some help for a friend that now has 5 amp camps and attempting to run his Klipsch Jubilee HF (horns only) on balanced XLR. At first, he was running two amp camps in stereo but tried balanced expecting higher output on his 8 ohm horns but he is getting 5db less vs running RCA bridged. Does anyone know why this is? I checked wiring multiple times and it’s correct.

How does he know it is 5db less? Putting a test signal into the amp and monitoring the output across the driver with a VOM or a scope?

 

[Dneu2011]

He uses his DSP crossover that has a Microphone to measure the SPL level. It is much less on XLR vs bridged with rcas.

 

[Dneu2011]

We are stumped. We tried different amp camps, different cables, and tested them on other systems.

 

[6L6]

...is the output of the dsp XLR the same as the RCA?

 

[Zen Mod]

hardly

 

[Dneu2011]

...is the output of the dsp XLR the same as the RCA?

The xlr output is the same if the amp was used in stereo mode.

 

[6L6]

??

You can't run a single ACA in stereo from the XLR...

 

[Dneu2011]

Yes of course. I’m just saying the output is the same.

 

[6L6]

Ok, now I'm really confused.

The DSP you mentioned only has XLR out. How was it connected with RCAs?

Are you taking the output across the two speaker blacks?

 

[Dneu2011]

Ok, now I'm really confused.

The DSP you mentioned only has XLR out. How was it connected with RCAs?

Are you taking the output across the two speaker blacks?

He converted the xlrs with an adapter to rca.

At first, he had 2 amp camps running 4 speakers in stereo by using xlr to rca adapters. His center channel was being run off an amp camp 1b mono amp.

He acquired 3 more amp camp 1.6 (stereo) amps and is now trying to run all of them XLR. He has been hooking them up according to the diy build guide.

One thing I did not mention is that all 5 amps he now has have been upgraded to premium parts and the changes were made based on Tungstenaudio's recommendations.

Schematic is attached (does not show the bridging resistor change to 68.1K ohms)