We just re-arranged the living room and added a 65" TV sitting on a console. I'm thinking about building a soundbar to improve the sound over the built-in TV speakers. Doesn't have to be a huge improvement, my Medicare-aged hearing is not what it used to be. Has anyone here built the Markaudio CHN-50 simple 3-driver soundbar https://www.kjfaudio.com/wp-content/uploads/2021/03/CHN50-simple-3-driver-soundbar.png? If so, what do you think? WAF dictates that it be no larger than 5-1/8" high by 6-1/8" deep by 50" wide and very close (maybe 6") to the floor, no visible wires, etc.
I use two 2 inch peerless for tv and it works great. I liked sealed better than ported, clearer. I can't imagine it will sound very good on the floor though, probably better on top if you can't put them just under the screen.
Also I would recommend a bsc coil and resistor circuit for each driver, or they may just snarl at you. There must be someone who has put one on that driver here somewhere if you search.
I'm a little puzzled by the Re of 3.4 ohms for that driver on madisound's datasheet, the impedance plot is higher than the one for the driver I used (ta6fd), but mine had Re 3.4 also, which is used to calculate the bsc circuit. I used .5mh and 3.3 ohms with an air core coil.
I'm basically letting the gear mix down the 'home theater' to stereo, then compressing the hell out of it and rolling off high and lows with the receiver tone controls to isolate dialog. It works pretty well.
I'm a little puzzled by the Re of 3.4 ohms for that driver on madisound's datasheet, the impedance plot is higher than the one for the driver I used (ta6fd), but mine had Re 3.4 also, which is used to calculate the bsc circuit. I used .5mh and 3.3 ohms with an air core coil.
I'm basically letting the gear mix down the 'home theater' to stereo, then compressing the hell out of it and rolling off high and lows with the receiver tone controls to isolate dialog. It works pretty well.
Probably not. They inherently have a slightly rising LF response, so assuming a position relatively near boundaries (probable for a small speaker or soundbar) most people tend to find they don't need any. There's a reason I don't generally include such circuits, and it's not for any notions of 'purity' or lack thereof.
Looks to me like people are just building systems around the lack of bsc. Expensive amps, placement gymnastics and toe in, who has the time? I'm just not that motivated.
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I bow before your superior knowledge.
Perhaps you could point to where anybody, other than yourself, has mentioned 'expensive amps', 'placement gymnastics' or 'toe-in' on this thread. In a similar vein your motivation for anything (or the lack thereof) is irrelevant, since you were not asking the question, and you are not the one considering building the speakers. QED.
Perhaps you could point to where anybody, other than yourself, has mentioned 'expensive amps', 'placement gymnastics' or 'toe-in' on this thread. In a similar vein your motivation for anything (or the lack thereof) is irrelevant, since you were not asking the question, and you are not the one considering building the speakers. QED.
I'm just saying it's a lot easier to do with a coil and a resistor. QED. Why is it you don't want to use bsc if it's not for 'notions of purity'?
As I said in the post you selectively quoted from:
I didn't think that was a particularly difficult concept to grasp.
In the interests of saving you time, I should mention that I design multiway loudspeakers in addition to single-driver types, and my latest 2-way has an 18 element crossover, so there is no future in trying to imply I am some form of lunatic purist who regards any and all filtering as an evil from Dracula's jacksie. 😉 Because I don't. OK?
I didn't think that was a particularly difficult concept to grasp.
In the interests of saving you time, I should mention that I design multiway loudspeakers in addition to single-driver types, and my latest 2-way has an 18 element crossover, so there is no future in trying to imply I am some form of lunatic purist who regards any and all filtering as an evil from Dracula's jacksie. 😉 Because I don't. OK?
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I'm not implying that you're a lunatic, I was just asking you why you don't want to use bsc. I guess that was your answer. Do you ever use it with fullrange driver speakers?
When I've experimented with placement, it seemed to me that what bsc does and what bass reinforcement from nearby surfaces does are two different things. It seems like there is an effect on the upper midrange that bsc will do that placement won't. Rolling up more bass from the bottom doesn't reach the midrange. Do you think so?
When I've experimented with placement, it seemed to me that what bsc does and what bass reinforcement from nearby surfaces does are two different things. It seems like there is an effect on the upper midrange that bsc will do that placement won't. Rolling up more bass from the bottom doesn't reach the midrange. Do you think so?
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This is another reason I liked the sealed better, the port made the bass a mess to deal with, it was on the back.
Yes, when it's needed.
Since I made it clear that I was not talking solely about boundary reinforcement, there is nothing to say.
At any rate I ordered a batch of CHN-50's from Madisound. When they show up that project will go onto the queue I've been trying to work off since I retired a year ago. First order of business is re-foaming the AR-14's I've had since college. Every pair of speakers I've owned since then has suffered by comparison, I suspect that has to do more with nostalgia than science.
Scott, I started building a quick prototype enclosure to do some listening comparisons and saw on the diagram that the center of the vent is specified as 10mm from the back inside of the enclosure. Is this supposed to be 30mm? With 15mm of lining and a 30mm dia vent, 30mm would be about the minimum distance from the back wall.
Clever design Scott. Hadn’t seen that one.
Being on the wall it is more likely the bottom will need to be dialed back as opposed to boosted.
I have never had to add BSC to any of our many MA builds. A BSC filter is a last ditch bandaid AFAIC.
dave
Being on the wall it is more likely the bottom will need to be dialed back as opposed to boosted.
I have never had to add BSC to any of our many MA builds. A BSC filter is a last ditch bandaid AFAIC.
dave