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I'm running Klipsch LaScalas full range driven by a modded Trends TA10.1 Tripath amp.
I'm using the Trends as a power amp only, fed by a Korn&Macway SP100 preamp.
Preamp has two main outputs plus one subwoofer output with independant level control, feeding an active DIY Beyma 15inch subwoofer in a vented box.
Sub amp has its own low pass filter and phase controls.
My question is this: since the little Trends amp is only roughly 2 x 8watts, maybe 5 watts under acceptable distortion levels, and the LaScalas folded bass horns drop like a stone under around 60Hz (depending on room reinforcement), I feel like I'm putting the little Trends amp under unnecessary stress by feeding it full range. i feel like I could gain a little bit headroom by filtering off the requencies under, say, 50Hz going from the main output of the preamp to the Trends.
I don't wanna use yet another active stage there. Neither do I want an external device forcing me to buy another set of expensive VanDenHul interconnects.
Is there a simple fix, like an in-line high-pass filter of good quality? Or should I mod one of the main outputs and put a good quality capacitor of given value inside the preamp, in line with the output?
thanks for your inputs!
Follow Ups:
My Reference 3A DeCapos for example. And they sound magnificent.
However it depends where you put the caps doesn't it?
If you put the caps across only the tweeter, then full range is going to the woofers. They better have compatible natural rolloff?
ken
What is the input impedance of the Trends TA10.1 Tripath amp?Just a single series cap per channel will give you a 6db per octave high pass filter.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 08/01/15
Your assumption that you're stressing the amplifier is flawed. The La Scalas are efficient enough that you're not demanding more than a Watt or two from them.
If you want to try it, you can get passive line level first order crossovers from Harrison Labs at Parts Express. (Use them at the inputs of the amplifier)
It's true that I don't really hear any clipping. But I was just under the impression that, as I listen to bass-heavy music (electro, rock, funk, soul, house, techno...) I might get a little bit more headroom and "ease" for the little Trends, since I like to crank it up.
But I don't wanna lose the nice transparency, detail and color I get at the moment (LaScalas are heavily modded, and so is the Trends; more resolving animals than their stock cousins)
You sure can give it a shot. All that's in those attenuators is a cap and resistor.
What you may gain is some lower distortion from the speakers, as they won't be taxed with low bass. (Where the woofer may not be that well loaded)
How about a line level X-0ver?
You have a lot of options, this is a chart if you want to do it yourself:
http://www.the12volt.com/caraudio/cross8ohm.asp
Or you can just buy one:
http://www.parts-express.com/100-hz-high-pass-8-ohm-crossover--266-462
If you want higher quality spend it on the cap. Lots of cap brand evaluations in the forums.
Does the sub amp have high pass out?
E
T
I guess it does, but i don't really wanna run / buy long interconnects to go from the preamp to the sub amp, then from the sub amp to the power amp. I use the same interconnects troughout and they were already a bit too much for my budget.
Plus I'm not sure about the quality of the high-pass filter in the sub amp.
That said, I could always give it a try with some cheaper interconnects, to see if it would be a viable option!
KanedaK wrote:
That said, I could always give it a try with some cheaper interconnects, to see if it would be a viable option!
A long run of lesser quality interconnects in order to implement the built-in subwoofer high-pass filter would do more sonic harm than good rather than opting for a Harrison Labs inline filter, of which you could experiment with and return if not satisfied. That said, even a high quality inline filter will likely be more detrimental from top to bottom rather than allowing the amplifier to be operated full-range via high efficiency loudspeakers.
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