In the process of making Frugel-Horn Mk3 speakers and some bigger stand mounts to replace small near field computer speakers which have Mark Audio CHN-40 drive units.
Now that the CHN-40 are spare I thought of using them in a 2 way, using them for high frequency duty. This is new to me as I have never made a crossover, please correct me if wrong but the CHN-40 would need to be in its own sealed part of the box. What size woofer would be a good match, low bass is not a problem, sealed box for both okay.
How would I size the volume for the CHN-40 and the woofer to work out the crossover. Sorry for so many questions, big leaning curve compared to single drive unit box and very easy to get wrong.
Now that the CHN-40 are spare I thought of using them in a 2 way, using them for high frequency duty. This is new to me as I have never made a crossover, please correct me if wrong but the CHN-40 would need to be in its own sealed part of the box. What size woofer would be a good match, low bass is not a problem, sealed box for both okay.
How would I size the volume for the CHN-40 and the woofer to work out the crossover. Sorry for so many questions, big leaning curve compared to single drive unit box and very easy to get wrong.
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Hi. id suggest to get WinISD and model the driver. Depends how high you want to cross the CHN40. I am working on something similar with a spare set of SLS8 woofers. Will be using CHN-70 though. I put them in 1.5L closed crossing at 170Hz. But going active with Fusion amps, soo much easier everything 🙂 Its a blast to work with them, already using it in other build. I could never make that cossover passive with my knowledge. Also they are awesome amps, pricey but great.
For the woofer size, anything goes 🙂 5", 6-6,5" even 8". Depends on box size you want to end up with.
For the woofer size, anything goes 🙂 5", 6-6,5" even 8". Depends on box size you want to end up with.
Thanks for the info, really want to go sealed for both drivers. Want for a fast speaker rather than a bass monster.
Then have a look at the Peerless SLS series, the SLS8 is really good in closed and is cheap. Needs huge box in basreflex. Works also great with 10" passive radiator (my desing has the Dayton 10" Designer passive with 60g in 28L and it brings it down to 43Hz with 70W input reaching xmax and 106dB or there about). For me 92dB is wayyy too loud.
For such a small driver it goes quite low. One could just use the sealed butterworth (5 litres) and bring sub(s) up to it with a complentary 2nd order woofer XO.
Increasing the slope of the HP would require some active intervention, a passive will be problematic due to the resonace peak.
Or one could move the XO as high as you’d like (given a woofer that reaches high enuff to meet the midTweeter)
dave
Not all that familiar with them. As i understand, SLS are specifically subwoofers, so may not be that extended.
For 300 Hz you’d like them to perform nicely up to 1.2KHz +, and for 500Hz, 2kHz+ extension.
CHN-70 is voiced for the Japanese market and is often not well liked by the NA ear. I thot they were decent (we put them in Castle microTowers Bass was good, top above about 5Khz is MIA). CHN-50 would be a better choice. Or Pluvia 7HD.
Lots & lots of good midBasses out there to play with.
dave
For 300 Hz you’d like them to perform nicely up to 1.2KHz +, and for 500Hz, 2kHz+ extension.
CHN-70 is voiced for the Japanese market and is often not well liked by the NA ear. I thot they were decent (we put them in Castle microTowers Bass was good, top above about 5Khz is MIA). CHN-50 would be a better choice. Or Pluvia 7HD.
Lots & lots of good midBasses out there to play with.
dave
Hmm, with a ~ 4 cm VC dia. = 34400/pi/4 = ~2737 Hz and 42.19 Hz Fs, then theoretical first XO polar matching point = ~ (42.19*2737)^0.5 = 340 Hz and we ideally want it rolled off at least to -24 dB/slope order, so 4 octaves away = (340*2^4) = 5440 Hz 1st order, (340*2^2) = 1360 Hz 2nd order, (340*2^2.828) = 2414 Hz 3rd order, (340*2^1) = 680 Hz 4th order
So whether 300-340 Hz, good to go with all except the ideal 1st order 🙁
So whether 300-340 Hz, good to go with all except the ideal 1st order 🙁