Cleansweep advantage if used with a slash series amp?

[miguel94]

Is there any advantage to using a cleansweep in a C6 HU? Is the signal out of the HU completely flat or will the cleansweep help some more? Besides the use of the auxillary port, I don't know if there is any other advantage. M

[pentavolvo]

as far as I was told and have experience the output on the C6 is flat, basically meaning the clean sweep is useless, and the worst part about it is you have a seperate volume knob you have to use

[TheKomoman]

Originally Posted by pentavolvo

as far as I was told and have experience the output on the C6 is flat, basically meaning the clean sweep is useless, and the worst part about it is you have a seperate volume knob you have to use

The output on the C6 NAV head is absolutely NOT flat and my guess is it's the same on the other head as it is designed to connect to the same set of Bose amps & speakers(I think the non-Nav head is the same whether it has Bose on the other end or not but I'm not certain of that).

We did an RTA scan on the NAV head and the results were that the it rolls off the bass about 8db/octave as gain increases. At low volume the response curve is flat but by the time you get to medium volume it starts to look like this:



Here's the thread where I posted all of the results of our analysis:

http://forums.corvetteforum.com/show....php?t=1446437

As a result of this, I am putting a Cleansweep in as part of my upgrade, hopefully this weekend.

[JLTD]

The outputs of all BOSE head units are flat. The equalization (BOSE magic) happens in the amplifier. The C6 does not have the GM SMART AMP system so the outputs are variable and analog. There is really nothing the CL441dsp needs to correct.
Many OEM systems employ a bass attenuation circuit as the volume is increased to protect the cheap OEM speakers. The also usually boost the low frequency at low volumes kinda like a loudness circuit.
All of our testing has shown that in systems like what is found in the C6 (non-SMART AMP) are flat at any volume (from the deck). The above analysis does not agree with our findings.
When using a Slash series or A Series amp (amps with differential balanced inputs) the outputs of the deck can be connected directly to the amp with excellent results. Use of these makes the job very easy: ECS
I would really love for you to buy a CleanSweep, but I can't recommend one for your car. The C6 we worked on for Stealthbox R&D had a CL441dsp installed because the owner hated the fact that the car had no audio controls in the steering wheel. Essentially, he has a $300 volume control in his console.
Put that extra money into a JL Audio Stealthbox
Good luck with your new system.

[miguel94]

Originally Posted by pentavolvo

as far as I was told and have experience the output on the C6 is flat, basically meaning the clean sweep is useless, and the worst part about it is you have a seperate volume knob you have to use

Originally Posted by JLTD

The outputs of all BOSE head units are flat. The equalization (BOSE magic) happens in the amplifier. The C6 does not have the GM SMART AMP system so the outputs are variable and analog. There is really nothing the CL441dsp needs to correct.
Many OEM systems employ a bass attenuation circuit as the volume is increased to protect the cheap OEM speakers. The also usually boost the low frequency at low volumes kinda like a loudness circuit.
All of our testing has shown that in systems like what is found in the C6 (non-SMART AMP) are flat at any volume (from the deck). The above analysis does not agree with our findings.
When using a Slash series or A Series amp (amps with differential balanced inputs) the outputs of the deck can be connected directly to the amp with excellent results. Use of these makes the job very easy: ECS
I would really love for you to buy a CleanSweep, but I can't recommend one for your car. The C6 we worked on for Stealthbox R&D had a CL441dsp installed because the owner hated the fact that the car had no audio controls in the steering wheel. Essentially, he has a $300 volume control in his console.
Put that extra money into a JL Audio Stealthbox
Good luck with your new system.

Thanks for the feedback guys... I will relay this to my installer, and try using the ECS cables without the cleansweep.

Hopefully it will work and sounds as good as the Ipod did through the Auxport input,



M

[TheKomoman]

Originally Posted by JLTD

The outputs of all BOSE head units are flat. The equalization (BOSE magic) happens in the amplifier. The C6 does not have the GM SMART AMP system so the outputs are variable and analog. There is really nothing the CL441dsp needs to correct.
Many OEM systems employ a bass attenuation circuit as the volume is increased to protect the cheap OEM speakers. The also usually boost the low frequency at low volumes kinda like a loudness circuit.
All of our testing has shown that in systems like what is found in the C6 (non-SMART AMP) are flat at any volume (from the deck). The above analysis does not agree with our findings.

Since what we found was so very different from what you're saying I'm naturally curious as to what you used to come to this conclusion. Have you tested a NAV head unit?

Thanks

[rtheil]

I just installed a cleansweep in my boss's 06 Z06 w/NAV, and immediately had problems with the cleansweep telling me that "Calibration Failed (Input signal not full range)". This was at about 70% volume as recommended in the cleansweep install manual.

After reading all about this, it seems as if the cleansweep is not detecting a full range of frequencies at the volume level I had set. Thus potentially proving that the NAV is not increasing the volume of the lower frequencies, as the volume increases.

I have more testing to do tonight, but I feel like I'm not going to be able to correctly calibrate the cleansweep.