hello everyone, guys! I'm new and my name is adriano.
I need your advice.
I've just made two 2-way speakers with a c18rly seaswoofer and a 27tdfc tweeter seas. the box volume is about 20liters and the qtc should be around 0.75.
the transient response seems good to me, but I'd like a little more bass ...
the question is: if I reduce the volume to about 16l, could I increase bass?
I need your advice.
I've just made two 2-way speakers with a c18rly seaswoofer and a 27tdfc tweeter seas. the box volume is about 20liters and the qtc should be around 0.75.
the transient response seems good to me, but I'd like a little more bass ...
the question is: if I reduce the volume to about 16l, could I increase bass?
Sure.
If you lower the volume you will raise qtc.
This will result in a peak at the cost of low freq extension.
But I don`t know if it is that good of a approach especially in a room where room effects could also result in a peak at that specific frequency.
If you lower the volume you will raise qtc.
This will result in a peak at the cost of low freq extension.
But I don`t know if it is that good of a approach especially in a room where room effects could also result in a peak at that specific frequency.
Increasing the level of the middle bass around the resonance can give the impression of more bass. Making the box smaller will do this but it will also increase the resonance frequency. However, often when people ask for more bass they are talking about going lower, without necessarily creating a peak.
Then there is you room. This will cause significant peaks and dips in the response. These are affected by where you put the speaker and where you sit. Fixing this is worthwhile and requires some work. You could simply experiment with your speaker position.
Then there is you room. This will cause significant peaks and dips in the response. These are affected by where you put the speaker and where you sit. Fixing this is worthwhile and requires some work. You could simply experiment with your speaker position.
Thanks a lot for the answers.
before changing the volume of the box, I will try to increase a little the value of the inductance in series to the midwoofer .... so perhaps decreasing middle frequencies I could have the perception of a lower bass...right?
before changing the volume of the box, I will try to increase a little the value of the inductance in series to the midwoofer .... so perhaps decreasing middle frequencies I could have the perception of a lower bass...right?
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I think your best option would be to add a port.
According to my sims, a port of 1.59" x 6" In your 20ltr box, looks much better than sealed.
According to my sims, a port of 1.59" x 6" In your 20ltr box, looks much better than sealed.
Yes i will try also this option...
but I admit that I really like the cleaning of the closed box, compared to the bass of the reflex, which seems to dirty the other frequencies
but I admit that I really like the cleaning of the closed box, compared to the bass of the reflex, which seems to dirty the other frequencies
Cutting the midrange lower than it is meant to be will create new challenges for you. I would prefer to leave it closed and use subwoofers, because subwoofers can be placed within the room to work with its modes.
I was thinking of increasing inductance mainly because the sound is a little hard and tiring.
now it is 2mH, I thought I would try 2.2 and 2.4., in parallel there is a 15uF capacitor
now it is 2mH, I thought I would try 2.2 and 2.4., in parallel there is a 15uF capacitor
If your source is a PC, you can apply some eq.
You can also tune a closed box with a series resistor,series capacitor or passive radiator.
You can also tune a closed box with a series resistor,series capacitor or passive radiator.
For closed box it is possible to use "Linkwitz Transform Circuit". I Have tested similar circuit, works very good for bass extension. Also I have used a very steep Subsonic filter, to prevent unnecessary cone movement.
ESP - The Linkwitz Transform Circuit
Linkwitz Transform Subwoofer Equaliser
ESP - The Linkwitz Transform Circuit
Linkwitz Transform Subwoofer Equaliser
It is quite normal that you are not satisfied with passive sealed box bass. Normally it needs some help in order to meet extension related to B-R or PR boxes and it never will have the same efficiency, unless you would have used two active drivers and 2x larger box... In our times majority of sealed boxes are supported with active / digital equalization.
Fortunately it is possible to boost & equalize bass response of sealed boxes also in passive world. This is "capacitor tuning":
http://www.sbacoustics.com/index.php/download_file/-/view/946/
Strassacker: Speaker Building, Components
Fortunately it is possible to boost & equalize bass response of sealed boxes also in passive world. This is "capacitor tuning":
http://www.sbacoustics.com/index.php/download_file/-/view/946/
Strassacker: Speaker Building, Components
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In my opinion the biggest cause of unsatisfying bass is an uneven response. Unfortunately this could mean unevenness in the bass, midrange or treble, so it is useful to have your speaker working before you make decisions. A speaker can sound good if it only reaches down to say, 70Hz, as long as it is balanced. 35Hz is even better but you won't reasonably get that from such a small woofer.
That`s why I build test enclosures of cheap mdf or mostly osb3 first.
I call it the WYHIWYG principle.
What you hear is what you get.
I call it the WYHIWYG principle.
What you hear is what you get.
thank you all.
I use roon which has a great integrated equalizer ... I have recreated a kind of loudness, with which the speakers are much better.
but we know that the audiophile is an enemy of loudness: D
I use roon which has a great integrated equalizer ... I have recreated a kind of loudness, with which the speakers are much better.
but we know that the audiophile is an enemy of loudness: D
What is greater, the technology or the human kind? The latter should not be serving the former, quite the opposite. Good luck!
One way of boosting only the bass would be to include a baffle step in the crossover. What you do is that you put a resistor and a coil in parallell with eachother. These you then put in series with the bass/mid speaker (as in the link below).
https://i.pinimg.com/236x/97/74/75/97747578d7515f236c04c099f88683f4--circuit.jpg
Tha bass (depending on coil value) will go through while the mid/treble is resisted. The downside is that this affects the sensitivity of the speaker and you might have to adjust the crossover for the tweeter as well. Try a resistor of 4 ohm (if 8 ohm speaker) and coil of ca 1mH.
https://i.pinimg.com/236x/97/74/75/97747578d7515f236c04c099f88683f4--circuit.jpg
Tha bass (depending on coil value) will go through while the mid/treble is resisted. The downside is that this affects the sensitivity of the speaker and you might have to adjust the crossover for the tweeter as well. Try a resistor of 4 ohm (if 8 ohm speaker) and coil of ca 1mH.
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Loudness is actually an active eq and quite brilliant. I think eq and loudness are accepted today. Just look at systems like Lyngdorf Roomperfect.
I use a lot of eq, and if you have a PC (linux or windows) you can even do it without phase distortion when using FIR filters. You just need a convolution engine.
I agree with this.
If I were you I would try the box volume change as it is so easy to do just to hear the effect. However any "boost" you may get from this will likely be a lower quality of bass.
Then I would move to your idea of changing the woofer coil in small increments (larger) AND with this lowering the overall sensitivity of your mids and treble.
Understand this, you can radically change the overall character of the sound with VERY small changes in level of mids and treb. Even 1/2 db here can sometimes make a surprising change. I have many times played this way and taken an OK sounding system to surprising level of fidelity with nothing more than overall tailoring of freq response
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