Author Topic: What amps do you find go well with your Alembic (Read 2965 times)

fmm · « **Reply #45 on:** December 21, 2005, 07:36:18 AM »

Is that the smaller one? I have heard of protection circuit / cut out issues wuth that one.

jlpicard · « **Reply #46 on:** December 21, 2005, 09:45:16 AM »

Thanks Dave, I'll check it out. mike

David Houck · « **Reply #47 on:** December 21, 2005, 01:44:14 PM »

Michael (FMM); it seems to me that one of our club members may have posted about such a problem, but when I was looking through old threads this morning I didn't notice anything. I think there have been a few members who currently have or did have this model.

jlpicard · « **Reply #48 on:** December 21, 2005, 09:04:58 PM »

On second thought, Does anyone know of any other manufacturers who make a single rack space power amp? I run through two Euphonic Audio cabinets with a combined power handling of 650 watts, so I'd ideally like something in that range. I'm presently using an Eden Traveler with 300 watts which sounds great but occasionally runs out of headroom. Also I need to mount my DS-5R but I'd rather not increase the size of the rack.
P.S. hope this isn't considered hijacking a thread? If so I apologize in advance. Mike

slapbass · « **Reply #49 on:** December 22, 2005, 06:49:10 AM »

I have a Stewart World 2.1 and this thing will push my two Epifani cabs through the roof. I just ordered the World 1.2 single rack space. Stewart told me that those issues with the power cut are over so I will find out.

Keep Thumpin'
Dale

David Houck · « **Reply #50 on:** December 22, 2005, 07:00:17 AM »

Mike; one possible solution might be to mount the DS-5R, or one of the other components, in the back of the rack. Another might be going with two racks instead of one; but then that might defeat the purpose of downsizing. Which EA cabs do you have; are they 4 ohm or 8 ohm?

jlpicard · « **Reply #51 on:** December 22, 2005, 01:43:49 PM »

They are 8 ohm models. The VL-110 and VL-208. Incredibly big sound from small cabs!

David Houck · « **Reply #52 on:** December 22, 2005, 05:07:01 PM »

Well I just wrote a bunch of stuff, and then deleted it. So I'll just say this. I've been glancing through the manual of the Stewart World 1.2 and on the last page it says you may need to leave an empty rack space above it to provide the air space it needs to keep cool. Kinda defeats your purpose of saving rack space.

crgaston · « **Reply #53 on:** December 22, 2005, 07:29:55 PM »

I read a review elsewhere that said the fins for the heat sink stuck up at the back of the amp, so you couldn't mount anything long (deep) on top of it. A power supply or preamp might be fine.

crgaston · « **Reply #54 on:** December 22, 2005, 08:24:07 PM »

Also, I just picked up a QSC PLX 2402 this week, and it rocks. I have been playing through an F1X, just using my SWR SM-400 as a power amp, and would often be running out of headroom too soon. I tried a WT-550 for several practices one gig, and it just didn't have the growl or punch I was used to. The F1X/2402 has both like you wouldn't believe, and with 425w @ 8 ohms and 700w @ 4ohms per side, headroom shouldn't be an issue (and only 21 pounds, too). Running through 2 Eden 112's and a SWR 4x8, it gives a great sound either fullrange or biamped.
Something unusual (or not, probably you all know this already) I tried just for fun, and am really glad I did, is running only the lowpass side ofthe crossover as a mono out. Set at 3-5 o'clock, it gives a good sound, similar to a filter on an Alembic bass. Then the treble and midrange knobs will act kind of like CVQ knobs. The bright switch will still work, too. I wasn't expecting it to work nearly as well as it does. It opens up a whole new palette of tone, and it sounds like it was designed to be run like this. Try it out if you like warm and punchy.
Charles

David Houck · « **Reply #55 on:** December 23, 2005, 05:55:58 AM »

Charles; I don't recall anyone posting that they had tried something like that before. Sounds interesting!

bob · « **Reply #56 on:** December 23, 2005, 10:26:45 AM »

Charles, what frequency range corresponds to the 3-5 o'clock settings?

David Houck · « **Reply #57 on:** December 23, 2005, 01:33:37 PM »

Ok, so I didn't use a tripod!

The numbers are 70, 150, 800, 3300.

I've spent about an hour or more trying to figure out how to calculate a curve based on these numbers; but I was unsuccessful. If you know the formula for plotting this curve or if you have software that will plot the curve based on these data, then you can tell what frequency range 3-5 o'clock would be. There may be an interactive java site that will do the trick; I just haven't found it yet. And my lack of math skills isn't helping any.

bob · « **Reply #58 on:** December 23, 2005, 03:03:46 PM »

I'm not a whiz at this either, but my guess is that you should be able to get a straight line using evenly spaced points on the x-axis for the marks, and a log scale on the y-axis for frequency.

And as I'm sure you've found by now, that won't fit... but from 150 up it's pretty close, and an eyeball fit gives me about 1250 and 2050 for the two marks between 800 and 3300.

So in round numbers, Charles is talking about using a low pass filter with the frequency in the range of about 1500-3300 (and no Q from the crossover itself). Sure, I can see that would be interesting.

crgaston · « **Reply #59 on:** December 23, 2005, 03:26:58 PM »

I'm not sure on the freq's, either. What I was doing was plucking with one hand and knob twiddling with the other (that sounds a little weird), and using my ears to figure out where to stop.