bgavin, Minx 110 project?

No. My projects are on hold now due to no work. Contracts are hard to find right now with the economy, WTC and all that.

The Peavey manual lists the Minx as 30w RMS into 8 ohms. You'd have to write them to see if they will support 4 ohms. I've got a Rockford 10" sub that is destined for mine, and it is 8 ohms with both voice coils wired in series.

If you haven't downloaded my spreadsheet, grab a copy from my site and sort it by driver size and increasing DBK Cubic Feet. This will show you the various 10" drivers from smallest to largest cabinet volume. Rockfords, Cerwin-Vega, and Diamond subs all fit the bill for running in 1 cubic foot or less.

A smaller than normal port will probably suffice, as I doubt if 30 watts will drive the speaker into very much excursion. A tiny cabinet like the Minx won't support a large port area due to the long duct required.

 

Way cool. Can you forward the email, or ???

That would make the project easier to work. Also would make adding an extension subwoofer safe without overdrawing the amp.

I'm slack right now, so toy money is restricted right now. I scored a Rane realtime analyzer, replaced my PE17 EQ with an interpolating graphic EQ, and scored another JBL E100, so the GAS money is spent for awhile.

 

If you really want to hear what 50 watts will do, put a JBL E140 into 1.2 cubic feet (net). Optimum tuning is 61 Hz, but you can tune down to 41 Hz by making the duct longer.

High pass filters for 50 Hz are really huge, and will cost you a pretty penny. You won't need a filter with the E140.

I gave up on analog tone generators because the frequency granularity was not accurate enough. I use a sound card with a software tone generator. The sound card drives a Yamaha 60 watt stereo A/V power amp. Nothing fancy.

 

The dial on my old signal generator wasn't accurate at all. I need to know an accurate 31 Hz for example, and the dial was way off. Same for analog volt meters. A sound card and digital volt meter is much more accurate.

 

The CURRENT model minx, introduced early this year with the external jack, will operate at 4 ohms.
If you have the older model WITHOUT a speaker jack, the minimum stable impedance is 8 ohms.

 

Yep. That answers that for certain. When the time comes, I'll make sure my old Minx has an 8 ohm load.

 

I put a EV 10BX speaker in my minx 3 years ago and it freaking rocks. If im every playing in small rooms or with a small acoustic set it's all i need. The volume can be turned to about 9 before it starts to distort with that driver

 

The EV is 98.5 SPL, so I bet it makes quite a bit of noise. It is optimum in 0.89 cubic feet.

 

I got around to putting the Minx 110 into his own rack. I nicknamed him Spike, because he's just a little dog with a big attitude.

Link to Photo

The next step is drilling out the chassis to accomodate two Neutrik D-series jacks. One in Speakon, the other as a locking 1/4" type. This way I can use the Minx to drive either a pro-sound setup like a bass horn cluster, or a 4x10 cab. I have to keep it at 8 ohms, because this Minx is the old style without the external speaker jack and without 4-ohm capability.

I ordered an Eminence S2010 driver, which is almost an exact replacement for the existing driver in the Minx cabinet. The factory tuning is wrong, but lengthening the ports would cure that.

I changed my mind, because the factory cabinet is 3/4" particle board and weighs too much for what it is. The S2010 would be right at home in an Omni 10.5, so that is where it is going. The 10.5 is bigger than the Minx cab, but it will make a lot more noise.

 

Hmmm ... are you going to do an airhead 10.5 for a combo, or leave the Minx in the rack and set it on top?

I'd personally love to have a little 10.5 or 10.3 combo amp!!! Just looking for ideas ...

Liam

 

The Minx is in his own space now. He can sit on whatever cabs are used at the moment. I figure it would be amusing to take a nice photo of the Minx driving a bass horn stack.

 

Agreed, Liam! I posted about an airhead 10.5 on BFM.. Bill said it's possible, for sure, but I haven't encountered anyone who's actually built one. It's a great concept. I'd like to rack my Neo-Pak in one.. what a nice small combo, that could be stacked on top of a standard 10.5!

Boy, this thread really came back from the dead! Bruce, what prompted you to start back up with the Minx project? I can't tell from the previous posts in the thread.. what is your goal with this project?

 

So that 30 watt minx could "act" more like 120 or so watts with a sensitive cab like the omni 10.5. Non technically speaking, of course.

Very interesting. nice racking job on the minx. It looks like carpet... I thought you were a duratex guy through and through!

Cool concept.

 

I had to pull the Minx to repair a bad pot. Once it was out, I got to thinking about an S2010 to replace the dying 10" Peavey driver. The internal volume is optimal for the S2010, and only longer ports are required to properly tune it. Closer inspection showed the Peavey cab to be half particle board, and half plywood. That sucks, so I gave up on that idea.

Then I started thinking about using the Minx to drive something better than the Peavey cab. I thought driving a T39/O10.5 combo would be amusing, and quite sufficient for rehearsal. Then I figured it would need Speakon and Neutrik locking 1/4" in the chassis rear, so it was time to put it into its own rack. The 1/2" baltic birch weighs more than the amp guts. Even so, it is teenie-tiny compared to my 6RU rack, and can drive anything with an 8-ohm load.

Carpet is more durable than Duratex, and a lot more pain in the ass to install properly. I'm anal about mitered corners and matching seams, so it is time consuming. I'm not a Duratex guy (yet), although I do have the spray gun and air compressor. I've been vacillating due to imagined overspray issues. The other builders say Duratex is a clean application, unlike spray paint, so I will eventually get around to a Duratex job when the need arises.

 

Do you have any idea, even a 'gut feeling', how the Minx driving an Omni 10.5 will be volume-wise? I mean, would it be similar in output to a traditional box-cabinet 60 watt combo, for example?

Liam