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True passive crossover for high-end stereo system with 1 or 2 subwoofers ?
- Thread starter djgras
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Sokel
Master Contributor
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That's not Icon Audio but interesting product...
GRADIENT XO-AMP
Gradient XO-AMP is an active crossover and power amplifier based on the new Hypex Ncore®-technology. There are two versions available: one for the Gradient Revolution Active and other for the Quad ESL & Gradient SW-system. The Gradient XO-AMP includes two power amplifiers per channel. Just...gradient.fi
Heheh, I don't, I live in Australia....If you live in the US and if you and Amir feel like it, submit that Harrison Labs FMOD to him for measurements, tests.
But the FMOD's are not overly expensive, and might be worth a test anyway....
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Doing passive crossovers for subwoofers is stupid.
If you are doing high-level filtering, coming off the amplifier, the inductor and capacitor costs skyrocket. If you try and use iron core inductors to save money, then you have hysteresis distortion. Even if you use air core inductors, then you are wasting amplifier power, because the inductors will add resistance to the circuit.
If you are doing low-level filtering with op-amps, well that isn't really "passive", and the distortion/jitter/noise isn't going to be any better than a digital solution. If you have a high-end system, $600 for a miniDSP Flex with balanced IO is pocket change. The ADC/DAC easily clears 16 bit resolution, and subwoofer integration is trivial with the DSP capability. With the op-amp setup you don't have a fraction of the flexibility.
www.audiosciencereview.com
If you are doing high-level filtering, coming off the amplifier, the inductor and capacitor costs skyrocket. If you try and use iron core inductors to save money, then you have hysteresis distortion. Even if you use air core inductors, then you are wasting amplifier power, because the inductors will add resistance to the circuit.
If you are doing low-level filtering with op-amps, well that isn't really "passive", and the distortion/jitter/noise isn't going to be any better than a digital solution. If you have a high-end system, $600 for a miniDSP Flex with balanced IO is pocket change. The ADC/DAC easily clears 16 bit resolution, and subwoofer integration is trivial with the DSP capability. With the op-amp setup you don't have a fraction of the flexibility.
Minidsp Flex Review (Audio DSP)
This is a review and detailed measurement of the Minidsp Flex audio signal processor. It was sent to me by the company and costs US $475 for unbalanced and $550 for balanced that I tested. Flex borrows the interface from SHD and puts it in a compact package. Seeing how I really liked that...
www.audiosciencereview.com
Passive crossovers before the amplifier - at the line level, pre-out - makes perfect sense....Doing passive crossovers for subwoofers is stupid.
If you are doing high-level filtering, coming off the amplifier, the inductor and capacitor costs skyrocket. If you try and use iron core inductors to save money, then you have hysteresis distortion. Even if you use air core inductors, then you are wasting amplifier power, because the inductors will add resistance to the circuit.
If you are doing low-level filtering with op-amps, well that isn't really "passive", and the distortion/jitter/noise isn't going to be any better than a digital solution. If you have a high-end system, $600 for a miniDSP Flex with balanced IO is pocket change. The ADC/DAC easily clears 16 bit resolution, and subwoofer integration is trivial with the DSP capability. With the op-amp setup you don't have a fraction of the flexibility.
Minidsp Flex Review (Audio DSP)
This is a review and detailed measurement of the Minidsp Flex audio signal processor. It was sent to me by the company and costs US $475 for unbalanced and $550 for balanced that I tested. Flex borrows the interface from SHD and puts it in a compact package. Seeing how I really liked that...
However in this day and age of cheap digital, one expects the pre-pro to do that work, and many (most?) do... AVR's with Biamp crossover capabilities, and the allocation of 2 channels both to front mains, with a crossover between them - and the crossover processing is done in the digital domain as part of the Speaker/Room EQ....
Crossovers done post amplifiers, have a bucket load of issues/complications.... effectively an obsolete technology
DanielT
Major Contributor
Sounds reasonable, but the subwoofer that the OP is thinking about already has:Doing passive crossovers for subwoofers is stupid.
If you are doing high-level filtering, coming off the amplifier, the inductor and capacitor costs skyrocket. If you try and use iron core inductors to save money, then you have hysteresis distortion. Even if you use air core inductors, then you are wasting amplifier power, because the inductors will add resistance to the circuit.
If you are doing low-level filtering with op-amps, well that isn't really "passive", and the distortion/jitter/noise isn't going to be any better than a digital solution. If you have a high-end system, $600 for a miniDSP Flex with balanced IO is pocket change. The ADC/DAC easily clears 16 bit resolution, and subwoofer integration is trivial with the DSP capability. With the op-amp setup you don't have a fraction of the flexibility.
Minidsp Flex Review (Audio DSP)
This is a review and detailed measurement of the Minidsp Flex audio signal processor. It was sent to me by the company and costs US $475 for unbalanced and $550 for balanced that I tested. Flex borrows the interface from SHD and puts it in a compact package. Seeing how I really liked that...
"Brand-new driver design, sophisticated DSP and full parametric EQ ensure a tailor-made fit for your set-up."
Sub 6 | Subwoofer | High-end low end
The Sub 6 matches seamlessly with your Dynaudio speakers… intelligently.
Plus 24 dB HP filter, see #15.
Then one must examine what Dynaudio means by: "sophisticated DSP and full parametric EQ". What are its features for Sub 6? Possibilities, limitations and so on.
yavormoskov
Active Member
Yes, the article is absurd at best.
Sorry for being late, but I'd seriously check required SPL and room size.
Sub6 is a relatively small sealed sub with 2x9" roughly equal to good 12,5". This size, extended down to 16 Hz in small sealed box have not much headroom when pushed hard.
I'd look at JL Audio. They are among the best in terms of "bass per cubic feet" but not cheap.
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