2011年4月19日 · I avoid drivers with a Qts of over .5 because the box volume they require gets large whether sealed or ported. Putting them in a too small enclosure means that big boomy hump with faster roll-off (weak bass extension). For sealed boxes, I stay around .7 for the Qtc. Higher Qtc (smaller box) means that boomy hump.

Corrected QT Interval (QTc) Corrects the QT interval for heart rate extremes (choose from Bazett, Fridericia, Framingham, Hodges, or Rautaharju formulas). When to Use

2024年8月5日 · QTC = 0.5 (Critically Damped): Offers the tightest, most accurate transients with minimal overshoot, but the depth of extension is reduced. QTC = 0.707 (Maximally Flat Amplitude Response): Usually considered the best balance between transient response and …

This is a handy health tool that can estimate the QT corrected interval by using the heart rate expressed in beats per minute and QT interval expressed either in seconds or milliseconds. The QT values can be obtained from the ECG test.

2005年8月9日 · Qtc is (more or less) a figure used to describe the resonant behavior of a driver in its enclosure (Qts is that of the driver itself).

2024年10月8日 · Corrected QT interval (QTc) The corrected QT interval (QTc) estimates the QT interval at a standard heart rate of 60 bpm; This allows comparison of QT values over time at different heart rates and improves detection of patients at increased risk of arrhythmias; There are multiple formulas used to estimate QTc.

2009年10月28日 · A Qtc of .707 is good for a wide range of music and vented systems used for Rap are often in the 1.0- 1.2 range. That would sound terrible for almost all other music. Transmission line and sealed box systems are generally much more neutral sounding.

I personally have listened to the same woofer in a box with Qtc of 0.7 and a box with Qtc of 1.1. There was no comparison as to which one sounds tighter and more accurate, the lower Q definitely was the best.

2020年9月2日 · Qtc describes the resonance when the driver is in a sealed box. Fs describes resonance frequency in free air. Fc is in a box. It might help if I describe what happens when you put a driver in a box. If the box is an infinite size, fs would not change. Qts would equal Qtc. As the box gets smaller, fs will increase. Qtc will start to get higher ...

Take a pair of SR6500 woofers and a pair of Vifa XT25bg60 tweeters along with a pair of SR6500 crossovers and put them into a custom made speaker box made out of Birch plywood. My question has to do with choosing the right volume for the box. I'm looking for very tight and snappy midbass.