MCM driver sale

[Tim A]

MCM has the 55-1740 10" bass driver on sale for $20. This is a suitable driver for many of Bill's designs, including the new Tuba 24.

The MCM-55-2421 8" is on sale for $25.

They're also listing a new 15" driver, the 55-1747 on sale for $35.00. Not sure if this would work at all, specs are 200w, 38-3.5KHz, Fs 43, QTs 0.46, Vas 205 L, Xmax 3.7 (seems low, but maybe with only 200w?)

Bill?

[trumpetbri]

Where are you seeing this? I've looked in the catalog that just arrived and on the website and the prices are higher.

[Sydney]

Try using the following "secret special source code" WR709
page 3 on
http://www.mcmelectronics.com/content/s ... f/R709.pdf
* MCM has this annoying habit of issuing multiple catalogs with different prices - so you have to apply a source code to get the deal - printed on the flyers and the PDF's of their flyer/catalogs usually have a code associated.

[trumpetbri]

Thanks much for the code. Even though I've bought stuff from them before, I didn't get the flyer with that particular code.

-Brian

[fender3x]

Has anyone used the 55-1740s to good effect in an O10? I was thinking that for this price they might be OK in my cosmetically inferior, overweight O10. Don't want to throw good money after bad...but at less than half of what an S2010 costs for a pair... I could maybe have'em now rather than saving my pennies

[Mikey]

Has anyone used the 55-1740s to good effect in an O10?

I don't recall anyone saying they tried them in the O10. Actually, it's been a while since anyone said they used them for anything. The specs don't seem too bad, but there is no chart. You could try them and if they suck you won't be out much cash.

Product Details:
10" Professional Woofer
Perfect for musical instrument, PA and sound reinforcement use. This driver exhibits characteristics typical of drivers at over twice the price. It is an ideal upgrade for the Eminence Alpha Series, and a drop in replacement for the Carvin PS10.

# Features: Rigid paper cone
# Treated cloth accordion surround
# Stamped steel basket
# 2" aluminum voice coil wound on a Kapton former
# 35oz. vented magnet

Specifications::
# Power Capacity: 150W/300W RMS/peak
# Sensitivity: 94.7dB (W/M)
# Impedance: 8ohm
# Re: 5.85ohm
# Le: 0.67mH
# Frequency response: 60Hz~5KHz
# Fs: 60Hz
# Qts: 0.50
# Qes: 0.54
# Qms: 7.59
# Vas: 55.33 (liters)
# Xmax: 4.0mm

Dimensions:
# Overall frame diameter: 10.25"
# Required cutout: 9.25"
# Mounting depth: 4.25"
# Weight: 9.00 lbs.

[bgavin]

Don't want to throw good money after bad...but at less than half of what an S2010 costs for a pair...

I don't understand doing all that work on an O10, only to use bastard drivers.

I'm doing three O10.5, and (mistakenly) purchased S2010 ahead of time. I wish now that I had ponied up for 2510-II instead.

[Mikey]

I'm doing three O10.5, and (mistakenly) purchased S2010 ahead of time. I wish now that I had ponied up for 2510-II instead.

There's a "For Sale" section just a couple mouse clicks away. Sell the S2010s to someone who needs them for their T24s and buy the 2510s for your O10s. People seem to be having very good results selling their stuff here.

I don't understand doing all that work on an O10, only to use bastard drivers.

they might be OK in my cosmetically inferior, overweight O10. Don't want to throw good money after bad

Why do you feel that it's overweight? Did you use 1/2" BB?

"Cosmetically inferior" can be fixed. You just have to decide how you WANT it to look and take the effort to make it look like you want it to.

After thinking about it...

If you put those $20 drivers in there, you'll actually be throwing bad money toward GOOD. You'd end-up with a cab that's like an ex-wife ... not only ugly and overweight, but no personality and won't do a damn bit of work! Save your money for a pair of 2510s, and make that cabinet look like a million bucks in the meantime. Then it'll end-up like an acceptable new girlfriend ... looks hot, has great personality, your friends will like her, and you'll want to play with her all night even if she does have a little extra cushion for the pushin.

[fender3x]

I don't understand doing all that work on an O10, only to use bastard drivers.

This is the logic I will use with all future BFMD cabs. However, when I got the plans for the O10 I had never even used--let alone owned--a circular saw. I'd never built much of anything, and was not sure I could. All I knew is that I had some leftover plywood from making hurricane shutters, and some drivers and tweeters lying around that Bill said would work...so...

Why do you feel that it's overweight? Did you use 1/2" BB?

I am pretty sure it's over 65 lbs. No, I did not use 1/2" anything. I used 5/8" CDX. Which is what I had left over. Not recommended. It worked, but the cab is much heavier than it needs to be.

You'd end-up with a cab that's like an ex-wife ... not only ugly and overweight, but no personality and won't do a damn bit of work!

Sounds like you know her! Scary!

I think that the main value of my O10 may be that it gave me the confidence to try a T39 and a DR250. The latter is almost done, and is 1/3 or more lighter. The DR fits just as well in my car (neither cab fits in the trunk). So I am guessing that the lighter, louder DR cab will get out more.

I have pretty much decided not to upgrade the O10. Instead I'll save my pennies for one 2510 and build an O10.5...so that I have at least one really small cab that fits in my trunk. That, the DR and the Titan may be all I need...but if not, I could always add a second O10.5.

So... Senor Gavin, I agree, but would rather put good drivers in a better cab, than good drivers in a cab I may not end up using

Don't get me wrong, the O10 sounds good, and is plenty loud when coupled with the T39. But to any other listeners out there in radio-land... Use 1/2" pine plywood, and the recommended drivers. You *can* build it and BGavin is right!

That said, if I'd gotten a ringing endorsement for $20 drivers, I might have done the upgrade...but since no one seems to think these drivers are much good...I'll stick to the plan.

[Tom]

For the record, I think the MCM drivers are a real bargain at $20. The Eminence 2510s are incredible, and can be obtained for about a hundred bucks.

There are a few situations where the MCM drivers meet project needs. My point is that many of Bill's designs can be built out of scrap plywood, a tube of PL, and a few MCM drivers - I have a couple of school kids in my shop building them right now with their grocery toting / lawn mowing wages.

When they are done they will have entry level professional gear, and won't be using speakers designed for the home stereo attached to a pawn shop A/V receiver.

We are lucky to have the resources and experience to upgrade to fine Eminence components. Some of us started with far less, and scant resources to obtain our starter gear.

The high performing BFM designs are within the reach of a large group of musicians - including kids, non-for-profits orgs, not-so-rich churches, and so forth.

[Mikey]

Right on, Tom. For people on an absolute showstring budget, a BF cab loaded with inexpensive, but suitable drivers are WAY ahead of the game in comparison to the alternatives for equal or even much more money.

A young, aspiring bass player could build TWO O10s, a FULL bass stack, for under $200. His buddy, whose well-off parents just bought him a new $600 Behringer, would be WISHING he had the Omnis!

BF cabs already carry preachers' sermons to thousands of people, and undoubtedly tens of thousands more to come.

[Tom]

I want to purchase some MCM 55-1740 drivers from someone who caught them on sale and stocked up. That was my plan, which I failed to execute so now I'm begging to buy any extras which might be for sale.

MCM sold out and won't have any more for 120+ days.