My first 3 way speaker build

[killa]

Re: My first 3 way speaker build

Measure the woofer at the same distance and drive level on axis as you do for the T/M (something like 24" is plenty of distance). Set the gate like you normally would to filter out all of the low end room related junk and save that curve. Now measure the woofer nearfield and adjust the level so the curve overlaps at the frequency your gate from the previous measurement starts. Save both curves. Use print screen and MS paint to remove the garbage and run the combined curve through SPL Copy. If there's a low frequency noise floor in your measurements like many people have you can also run the results through response modeler to add a filter that removes the junk.

You will need to do this for your mid as well. That noise floor in the mid/tweet measurements will throw off the phase in your x over sim.

Or you can just use the Frequency Response Blender ;) http://audio.claub.net/software/FRD_...r/Blender.html

[Jay1]

Re: My first 3 way speaker build

Or you can just use the Frequency Response Blender ;) http://audio.claub.net/software/FRD_...r/Blender.html

But then I have to figure out how to use another program and I like my backwords ways :D

[killa]

Re: My first 3 way speaker build

But then I have to figure out how to use another program and I like my backwords ways :D

I understand. I just got a smartphone to replace my flip phone about a year ago lol. I still don't know why? Worse sound, shorter battery life, and it isn't as durable!

[PWR RYD]

Re: My first 3 way speaker build

I understand. I just got a smartphone to replace my flip phone about a year ago lol. I still don't know why? Worse sound, shorter battery life, and it isn't as durable!

Remember when people were smart and phones were dumb? (Heard that from some comedian). :D

[JasonP]

Re: My first 3 way speaker build

Remember when people were smart and phones were dumb? (Heard that from some comedian). :D

I try and stay away from smart phones, I don't like using things more intelligent than me.

[mattsk8]

Re: My first 3 way speaker build

I got the cabinets roughed in about a month ago, and I now have a crossover roughed in!!! Now I need to voice these and play with the bass cabinets a bit. I kind of feel a bit... out of my league :o. IMO voicing these is like having to drive the space shuttle down the expressway during rush hour, because there is so much going on (they're revealing to say the least). All the drivers are incredible, the SS 18w mid is nothing short of spectacular, and the SS HDS tweeter is a perfect fit for it; the mids and highs aren't lacking anywhere.

This all measures pretty flat right now, but the bass is a tad wonky, I need to play with stuffing. There's a bit of a dip in the 100Hz region, but that could've been the room too. I have the woofer crossed at about 250-225, and mid is at about 2.3k. I have one of the cabinets lined with 1" thick, spongy adhesive backed foam, the other is empty. I'll play with swapping woofer position (on the floor verses how it is in the pic), then I'll play with different stuffing. FWIW, I called Madisound and they said their cabinet dims were good to go, so I used their specs for the SB29 woofer and built the woofer cabinet 2.0 cf, with a 3" x 12" precision port, which should have a F3 of around 27 Hz. Once I get the bass where I like it, I'll move on with my attempt to voice those mids and highs :eek:.

No real questions (yet), just thought I'd update progress. So far what I think I love is how revealing these are, but I've only had about an hour of play time with them.

[Sydney]

Re: My first 3 way speaker build

...This all measures pretty flat right now, but the bass is a tad wonky, I need to play with stuffing. There's a bit of a dip in the 100Hz region, but that could've been the room too. ...

Are you doing impedance sweeps and T/S generation?

[mattsk8]

Re: My first 3 way speaker build

Are you doing impedance sweeps and T/S generation?

Yes to both. These are going to be hard on my Carver TFM-55 amp, but I think it's up for the challenge. The impedance dips into the 3 ohm range.

[Sydney]

Re: My first 3 way speaker build

...The impedance dips into the 3 ohm range.

What's the phase angle @ that point?

[mattsk8]

Re: My first 3 way speaker build

What's the phase angle @ that point?

I can hopefully answer that one later, I don't have the measurements here. Once I do, I'll let you know.

[ani_101]

Re: My first 3 way speaker build

These coming to chicago?

[mattsk8]

Re: My first 3 way speaker build

These coming to chicago?

I doubt it. I do think I'll have them ready for Meniscus' show in mid September though .

[Navy Guy]

Re: My first 3 way speaker build

This should make for a great combination. I look forward to seeing more info on these.

[rpb]

Re: My first 3 way speaker build

I got the cabinets roughed in about a month ago, and I now have a crossover roughed in!!! Now I need to voice these and play with the bass cabinets a bit. I kind of feel a bit... out of my league :o. IMO voicing these is like having to drive the space shuttle down the expressway during rush hour, because there is so much going on (they're revealing to say the least). All the drivers are incredible, the SS 18w mid is nothing short of spectacular, and the SS HDS tweeter is a perfect fit for it; the mids and highs aren't lacking anywhere.

This all measures pretty flat right now, but the bass is a tad wonky, I need to play with stuffing. There's a bit of a dip in the 100Hz region, but that could've been the room too. I have the woofer crossed at about 250-225, and mid is at about 2.3k. I have one of the cabinets lined with 1" thick, spongy adhesive backed foam, the other is empty. I'll play with swapping woofer position (on the floor verses how it is in the pic), then I'll play with different stuffing. FWIW, I called Madisound and they said their cabinet dims were good to go, so I used their specs for the SB29 woofer and built the woofer cabinet 2.0 cf, with a 3" x 12" precision port, which should have a F3 of around 27 Hz. Once I get the bass where I like it, I'll move on with my attempt to voice those mids and highs :eek:.

No real questions (yet), just thought I'd update progress. So far what I think I love is how revealing these are, but I've only had about an hour of play time with them.

[ATTACH=CONFIG]59161[/ATTACH] [ATTACH=CONFIG]59162[/ATTACH]

I'd add stuffing to the second box right away. I don't know how you can listen to it at all with it empty.

[mattsk8]

Re: My first 3 way speaker build

I'd add stuffing to the second box right away. I don't know how you can listen to it at all with it empty.

I've only had about maybe an hour of listening time so far and I want to play with it. That's where I'll start, I have dacron and some polyfill and I'll play with that first. I didn't stuff them because I wanted to listen first to the difference lining the cabinet made.

To be completely honest (and not to start a huge war), I don't think stuffing makes a super huge difference either way. But I'll play with it and find out.