Recent content by Peter van Gils

SC-444 (for example, maybe more?)

You’re in the UK, right? Are you sure that you don’t have an extension cord with Earth and Neutral swapped in the plug? The neutral current might be going through your convertors…

Check the pins in the RJ45 chassis connectors. There has been an early batch where the pins could be pushed back into the connector causing bad contacts. Been there…

The selenium does not seem much better from the datasheet:

Is this from the datasheet? Note that the distortion is raised 10dB in the datasheet.

Do you want to run 1 or 2 cabinets per side? 2x 16 Ohms requires a very beefy amp: it needs to be able to deliver > ~2.5 kW @ 8 Ohms if you want to utilize the full capability of the cabinet. Running 2x 8 Ohms can save you €€ on the amps.

A single 18 BR cabinet can not keep up with the PM60/90. A tapped horn like the TH118 has much more output (but is twice the size/weight). 4 tapped horns with the 18sw115 would be a perfect fit and will put a smile on your face :-D I’m using one TH118 with 18sw115 per side (limited by my...

My experience with the VRX932 is that they tend to start ‘screaming’ (distort) at higher volumes. But I have the same experience with other 12” designs with x-over frequency in the >1.2kHz range. More recent designs have x-over frequency <800 Hz and seem to behave better (e.g. tt22mk2, diy...

But, but, ... this thing is huge... dual 15" or 4x12" horn loaded cab like the PM60/90?

So, why build & lug 4 cabinets if 2 PM90s can do the job. 😉

Jan Jaap, exactly, with the 18 sound horn it is an even tighter fit. Even if the diameter of the dcx driver would fit, there is still the risk of hitting the dcx with the 12” membranes. edit: Max, our posts crossed ;-)

Ok. How far is the DCX driver from the 12” membrane? The xmax/xmech of these drivers is quite large...

👍 Also try a half space measurement (with mic and speaker on the ground) to verify the result (there might be some back reflections in the low mid in your measurement). BTW: What is your ‘achternaam’? 😉

Did you put the box on its side on the ground? Can still be a travel distance between the two 10” drivers. Also put the mic exactly on-axis.

Probably because you’re measuring not close enough or not far enough from the ground. In other words: this could be caused by ground reflections and the difference in travel time between the direct sound and the reflections. Try to measure half space with the mic (and speaker) on the ground.