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What considerations make you say that? Is it the aesthetics of the listening environment? Or is it the performance of the loudspeaker? The general dimensions of the KH 120, KH 150, and KH 420 are shown below, including their low-frequency cut-off points. The Genelec 8351B and 8361A are also...

According to the KH120 II/KH150 User Instructions, the switches are on the back panel. Below is an excerpt from those instructions.

If a pair of larger 3-way loudspeakers are going to be used, wouldn't that reduce your maneuvering options as far as room placement goes, from a low-frequency response perspective? In any case, the KH 750 subwoofer is going to go way lower in frequency than most larger 3-way systems, as it is...

The ATC website has the following specifications for the SCM20: Amplitude linearity: 80Hz – 20kHz (±2dB) Cut-off frequencies: 55Hz – 25kHz (−6dB freestanding)

@Tim Link Would you be able to show us a measurement or two? That might help visualize what's going on with the response.

@AdamFrandsen Would you please provide examples of such amplifiers and a suitable test signal that makes the effects of "insufficient slew rate" audible.

@guy48065 Which commercial CD was this? Can you pinpoint which tracks were affected?

@terryforsythe Did you apply a high-pass filter to the main speakers? If so, what were the settings? The results depend a lot on the magnitude and phase response of the subwoofer and main speaker systems, as well as the type of low-pass and high-pass filtering that's been applied.

Is the above example of a port resonance what is referred to as "a worst case scenario"? :facepalm:

I've converted the VituixCAD model to use linear-phase 4th-order Butterworth low-pass and high-pass filters, set to 80Hz. The results are shown below. The simulation using only the 2nd-order Butterworth low-pass filter on the subwoofer is shown below. This configuration has a slightly greater...

@ppataki, I did a VituixCAD simulation of an estimated version of what a closed-box (blocked vent) version of the Adam Audio T5V loudspeaker might be. The assumption was that the low-frequency alignment would have a Qtc=0.584 with a box resonance frequency of Fc=74.7Hz. The red curve in the...

The force generated by the woofer cone motion of one of the horizontally opposed woofers is transmitted from the woofer basket to the baffle on which that woofer is mounted. That force is then distributed over the entire edge of the baffle and transmitted as a distributed force into the left...

The software that was used for the simulations was VituixCAD. No measurements were done. The parametric EQ on the Topping D50 III is limited to only the USB input. The D50 III also has no provision for any low-pass or high-pass filters. Neither was there any provision for a delay function of...

Thanks for sharing the LT filter's settings, and I understand that it was only used for some preliminary testing. I've plugged them into VituixCAD and I get the following filter gain response function. This is adding 12dB of boost at 40Hz, and almost 19dB of boost at 20Hz.

The T5V speakers don't have a particularly extended bass response. They seem to be −3dB at about 60Hz or so, going by Adam Audio's published response curve. They claim to be −6dB at 45Hz, but that does not seem to be borne out by the measured frequency response curve. That's not entirely...

Of course, with lots and lots of amplifier power being applied, the EQ-boosted small closed-box loudspeaker will have its voice-coil heat up relatively quickly. A lot of power is "wasted" getting the cone moving at lower frequencies against the restoring force of the low-compliance small...

If anything, the "too slow" feel to the ported loudspeaker's response is simply due to its more extended bass response. The ported enclosure's extra output greatly affects a listener's perception in that regard. Of course, one area where the sealed enclosure excels is that it doesn't produce any...

@ppataki Would you be able to share the settings that you used for the Linkwitz Transform filter? I am curious about how much EQ it is providing for the closed-box woofers.

The Dayton Audio SPA500DSP 500W Subwoofer Plate Amplifier with DSP is a little bit limited in the types of low-pass filtering that it can provide. It allows for what appear to be 2nd-order and 4th-order Butterworth low-pass filters only. There is no provision for 2nd-order or 4th-order...

The Dayton Audio SPA500DSP 500W Subwoofer Plate Amplifier with DSP is a little bit limited in the types of high-pass filtering that it can provide. It allows for what appear to be 2nd-order and 4th-order Butterworth high-pass filters only. There is no 2nd-order peaking filter available to...