@Tom_S said:
With that nice sensitivity, there might be a few SET tube guys that would love them.
It isn't super sensitive. My FR measurements are done after I measure for distortion at 95db. I just gate the distortion measurement. I like to know what is going on in the on-axis at high volumes. So, probably a bit more than 1W represented. If I were to hazard a guess, I would say it is probably around the 81-82db range and that is only because I didn't do a full baffle step. It is kind of why I recommend a high current Class AB or a cheap high output Class D for them. They will be power hungry, but that is the price of hitting below 50Hz in a sealed design in only 1.2 cubic feet.
Got a listen yesterday , they sound mwaaaa . Very nice build , as usual everything sounded balanced and well executed. If I had the room Id build a set.
I found I had near half the parts already so I ordered the rest a while ago. Gotta start finding homes for builds though before doing more. If only I could break this habit of building big.
@DrewsBrews said:
I found I had near half the parts already so I ordered the rest a while ago. Gotta start finding homes for builds though before doing more. If only I could break this habit of building big.
Big or small, I can't seem to stop building as well.
A friend of my wife expressed some interest in me building something for them. I don't trust my own skills enough to design something for a non family member. But I have the parts for this.
They seemed open to towers if they aren't huge. Was thinking of narrowing the baffle an inch or so, but keeping the M/T the same distance from the closer side. I wouldn't think that would effect baffle step enough to add more than a small midbass dip all else being the same? Woofer Qts seems would make for little change in the bass alignment with a not huge increase of internal volume.
Gotta wait for the 8"ers to come back in stock. One ended up being a dud measured 10ohm
Cool, only other thing I can think of would be: Any idea how much recessing the woofer ~1/8" would mess up the alignment? These will probably operate most of the time with grills. Not wanting to screw up the sound too much I thought of trying thin 1/8" tempered hardboard stuff. But the woofer gasket and surround would probably be thicker than the grill in that case.
I did get a pair of ND28's that were mismatched but PE was kind enough to send me two more for free. In the end I had two that matched very well. They will be playing in Iowa paired the MAC-04 woofers.
I think you guys figured it out, but I meant the ND25FA to be specific. I forgot the waveguide one is also an ND25. (and Ti, and no faceplate version, doh)
Comments
Great write up JR. I wish I had your writing talent.
With that nice sensitivity, there might be a few SET tube guys that would love them.
It isn't super sensitive. My FR measurements are done after I measure for distortion at 95db. I just gate the distortion measurement. I like to know what is going on in the on-axis at high volumes. So, probably a bit more than 1W represented. If I were to hazard a guess, I would say it is probably around the 81-82db range and that is only because I didn't do a full baffle step. It is kind of why I recommend a high current Class AB or a cheap high output Class D for them. They will be power hungry, but that is the price of hitting below 50Hz in a sealed design in only 1.2 cubic feet.
I'll build stands for them tomorrow. I'm going to run them as my mains in the basement for awhile.
I've always had a knack for it - I give credit to the thousands of books I have read.
Updated and expanded writeup attached.
FYI, the unofficial name for these speakers is "Insomniacs".
Got a listen yesterday , they sound mwaaaa . Very nice build , as usual everything sounded balanced and well executed. If I had the room Id build a set.
JR, did you model this as a ported floor stander?
It ports pretty poorly. I know Rory did so with his Iguanas but he must have used some magic or a very low crossover point.
JR, did you ever get any glamor shots of these completed on the stands? This does look like a fun build. I hope to hear them someday.
I totally forgot to do so lol. I get some time I'll pull them out and do so.
No worries. I bet I have 80% of what's needed in my stash of unused drivers. I should just stop being lazy and build them.
Pretty straightforward build with a simple xo.
I found I had near half the parts already so I ordered the rest a while ago. Gotta start finding homes for builds though before doing more. If only I could break this habit of building big.
Big or small, I can't seem to stop building as well.
Small just has different challenges.
InDIYana Event Website
A friend of my wife expressed some interest in me building something for them. I don't trust my own skills enough to design something for a non family member. But I have the parts for this.
They seemed open to towers if they aren't huge. Was thinking of narrowing the baffle an inch or so, but keeping the M/T the same distance from the closer side. I wouldn't think that would effect baffle step enough to add more than a small midbass dip all else being the same? Woofer Qts seems would make for little change in the bass alignment with a not huge increase of internal volume.
Gotta wait for the 8"ers to come back in stock. One ended up being a dud measured 10ohm
Yeah, an inch wont matter much. You could probably get away with 1.75 cubic feet and it would be pretty good.
Cool, only other thing I can think of would be: Any idea how much recessing the woofer ~1/8" would mess up the alignment? These will probably operate most of the time with grills. Not wanting to screw up the sound too much I thought of trying thin 1/8" tempered hardboard stuff. But the woofer gasket and surround would probably be thicker than the grill in that case.
That won't dick with things too much, either.
Looks like the DSN25F-4 is discontinued
Bummer, I liked those little boogers...
InDIYana Event Website
Guess I'll have to try a different tweeter. The ND28 would be a natural but the reports of consistency issues scare me off.
Any experience with the ND25?
Nope, although that is on the list.
I did get a pair of ND28's that were mismatched but PE was kind enough to send me two more for free. In the end I had two that matched very well. They will be playing in Iowa paired the MAC-04 woofers.
Used the ND25 in the Synchaetas, I liked them. Good to 2.5K, but sounded better above 4k.
InDIYana Event Website
I think you guys figured it out, but I meant the ND25FA to be specific. I forgot the waveguide one is also an ND25. (and Ti, and no faceplate version, doh)