Hello dear community, I just bought a pair of Monacor DTM-104/8 tweeters to replace in my towers. Specs are:
fs = 1,200 Hz
sensibility =92 dB/W/m ( i kinda doubt for the price they are)
8Ohm, 45W rms .
They recommend 2.5khz crossover freq. I doubt its kinda low for the 1.2khz fs.
I would apreciate some tips, help. To build a high pass filter for them, I tought about 2nd order, around 2.7-3khz .
What you recommend?.
( Im familiar with electronics, amps in general, Im not that " schooled " in crossovers, I build a few crossovers before, ( used online calculator ) but just simple 2nd order ( cap + inductor ) no fancy resistors for impedance " smoothing" , sensibility matching , etc.
Towers have two 6.5' each, 12ohm ! in parallel, no crossover, just a tiny cap for the tweeter ( which are dead , of course). I dont intend to make a 2way crossover for them, they sound fine without one. ( testing by ear, they reach 5k as loud as 500-1K , and beyond that they start to sound lower in volume. ) So they play pretty high.
So having two 12ohm woofers in parallel and the tweeter being 8 ohm. Do I need to " worry " about the woofers being 6ohm in parallel or not. ( original tweeter was 6ohm with one series cap in paralell with the woofers.
I want to build a good pair of crossovers for the tweeters.
( towers they say are 91db/w ( didnt measure, they get loud at low volume but i doubt they are so efficent for their price )
My question is the tweeters are rated for 45w, and my towers ( they don't distort, I was really suprised they can handle that power without sounding like crap ( originally bought them as 5ch system, but used just the towers on my pioneer amp for a long time now.I usually play them at max 60w per channel but they can handle with ease 80-100W ( when i really want them loud, which is rare but I dont want to Fry the tweeters.) ( amplifier is Pioneer a702r , 130w per channel 0.007% thd. ) I dont ever clip it.
Here are some pictures.
thank you !, Bruno.
fs = 1,200 Hz
sensibility =92 dB/W/m ( i kinda doubt for the price they are)
8Ohm, 45W rms .
They recommend 2.5khz crossover freq. I doubt its kinda low for the 1.2khz fs.
I would apreciate some tips, help. To build a high pass filter for them, I tought about 2nd order, around 2.7-3khz .
What you recommend?.
( Im familiar with electronics, amps in general, Im not that " schooled " in crossovers, I build a few crossovers before, ( used online calculator ) but just simple 2nd order ( cap + inductor ) no fancy resistors for impedance " smoothing" , sensibility matching , etc.
Towers have two 6.5' each, 12ohm ! in parallel, no crossover, just a tiny cap for the tweeter ( which are dead , of course). I dont intend to make a 2way crossover for them, they sound fine without one. ( testing by ear, they reach 5k as loud as 500-1K , and beyond that they start to sound lower in volume. ) So they play pretty high.
So having two 12ohm woofers in parallel and the tweeter being 8 ohm. Do I need to " worry " about the woofers being 6ohm in parallel or not. ( original tweeter was 6ohm with one series cap in paralell with the woofers.
I want to build a good pair of crossovers for the tweeters.
( towers they say are 91db/w ( didnt measure, they get loud at low volume but i doubt they are so efficent for their price )
My question is the tweeters are rated for 45w, and my towers ( they don't distort, I was really suprised they can handle that power without sounding like crap ( originally bought them as 5ch system, but used just the towers on my pioneer amp for a long time now.I usually play them at max 60w per channel but they can handle with ease 80-100W ( when i really want them loud, which is rare but I dont want to Fry the tweeters.) ( amplifier is Pioneer a702r , 130w per channel 0.007% thd. ) I dont ever clip it.
Here are some pictures.
thank you !, Bruno.
Attachments
Im sorry the pictures are 90degreese to the right. They were in the right position when I uploaded. I dont know what happend.
Use these formulae to calculate the parts for your 2nd order xover, where fx is the crossover frequency (I'd use 2500 Hz), and Z is the impedance of the driver at that frequency:
C = 0.0796 / ( Z × fx )
L = ( 0.3183 × Z ) / fx
C = 0.0796 / ( Z × fx )
L = ( 0.3183 × Z ) / fx
searching fo Monacor DTM-104/8, there are some projects around...
I'd just copy this 3rd order filter
2pasmo Tesla ARN 5608 + Monacor DTM-104/8 (Stranka 1) - Reprosoustavy - Audioweb.cz
Because it should fit!
I'd just copy this 3rd order filter
2pasmo Tesla ARN 5608 + Monacor DTM-104/8 (Stranka 1) - Reprosoustavy - Audioweb.cz
Because it should fit!
It is preferred to cross as far below 3k as you reasonably can with these, to reduce the effect of the region where the woofer beams. It's possible that low-passing the woofer will help to better define and navigate this region.
Another suggestion is to make this a 2.5 way arrangement. This could simplify or even improve the crossover region, and would simplify baffle step compensation.
Another suggestion is to make this a 2.5 way arrangement. This could simplify or even improve the crossover region, and would simplify baffle step compensation.