Hey guys. I've built a few projects over the years, including some sophisticated TL enclosures, so a pal of mine asked me to custom build him a pair of speakers.
Here's the deal; he's had a Logitech Z-2300 desktop system for years now. I've always thought of it as kind of a joke (as i think most desktop systems are), but it turns out it is one of the better sound products Logitech has produced. The 10 inch subwoofer is quite adequate for small room listening, actually.
Anyhow, he tells me that his satellite speakers stopped functioning and he wants to replace them by something "better", but at a reasonable price. I looked at the system's amplifier and it looks like it produces 20W/40W at 8 ohms, hence the low power requirement. So, I was looking at low power full range drivers and came up with the current version Mark Audio CHR-70. It looks like a good driver and most people seem happy with it.
I noticed that there are quite a few different designs with this driver, ranging from the simplest bass-reflex to (ML)TQWTs and even line arrays.
However, my friend doesn't have a lot of room for speakers, so he wanted the smallest design possible. Also, there's a filter at 150 Hz built in the Logitech system's amplifier, so it defeats the purpose of a fancier enclosure anyways.
That's the design i chose (i am still open to ideas, as i haven't ordered the enclosure material yet) it is from the official plans in MarkAudio's website:
Andreas vented design ShoeBox-70.3
So, what do you guys think about the design i've chosen for this exact application? Do you have any suggestions and/or advice?
And then, there is the question about the filter; the author of this project mentions to try a simple 0,39mH coil with a 4 Ohm /10W resistor in series, but i am not quire sure about that. Afaik, most people build projects with this driver without any filters. Wasn't "no filters" kind of the philosophy behind Mark Audio's products in the first place?
Thanks in advance,
and sorry for the long post.
Here's the deal; he's had a Logitech Z-2300 desktop system for years now. I've always thought of it as kind of a joke (as i think most desktop systems are), but it turns out it is one of the better sound products Logitech has produced. The 10 inch subwoofer is quite adequate for small room listening, actually.
Anyhow, he tells me that his satellite speakers stopped functioning and he wants to replace them by something "better", but at a reasonable price. I looked at the system's amplifier and it looks like it produces 20W/40W at 8 ohms, hence the low power requirement. So, I was looking at low power full range drivers and came up with the current version Mark Audio CHR-70. It looks like a good driver and most people seem happy with it.
I noticed that there are quite a few different designs with this driver, ranging from the simplest bass-reflex to (ML)TQWTs and even line arrays.
However, my friend doesn't have a lot of room for speakers, so he wanted the smallest design possible. Also, there's a filter at 150 Hz built in the Logitech system's amplifier, so it defeats the purpose of a fancier enclosure anyways.
That's the design i chose (i am still open to ideas, as i haven't ordered the enclosure material yet) it is from the official plans in MarkAudio's website:
Andreas vented design ShoeBox-70.3

So, what do you guys think about the design i've chosen for this exact application? Do you have any suggestions and/or advice?
And then, there is the question about the filter; the author of this project mentions to try a simple 0,39mH coil with a 4 Ohm /10W resistor in series, but i am not quire sure about that. Afaik, most people build projects with this driver without any filters. Wasn't "no filters" kind of the philosophy behind Mark Audio's products in the first place?
Thanks in advance,
and sorry for the long post.