Allen speaker cabinets

[Arden]

[:$]I have four Allen speaker cabinets (3 Gyro's &amp; a "plain" one); none of them have any sort of back panel on them, but there ishardware on each of them that suggests there USED to be.</P>


So my question is, should I build rear panels to enclose the speakers, if so will it enhance the sound or just keep my cats out?</P>


thanks,</P>


Arden</P>

[nullogik]

Re: Allen speaker cabinets



Hi,

I believe we both own the same speaker cabinets. Mine too have no backs to them and they were installed at our Church such that the open backs were against a wall.</p>

I've seen quite a few of these cabinets elsewhere and none of them had any backs either. Someone more qualified than myself on this forum can probably suggest a reason why Allen left them open back then but now enclose them.
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[jbird604]

Re: Allen speaker cabinets



No need to enclose the backs unless you need to keep smallfingers out of the gyro mechanism. I would worry about the cats getting in there and getting their tails caught in the belts and pulleys. Perhaps some screen or fabric material would keep them out!</P>


The backs were never fully enclosed, but there was a piece of fiberboard covering about 3/4 of it. The rest was left open to allow for ventilation, to cool the motors and other electrical parts. The "plain" cabinet, whether a dual-15" or a "sweet sixteen" or any other type may or may not have had a back. I doubt that it did.</P>


Back in those days, Allen used speakers that had very rigid cone suspensions, and speakers of that type are meant for open-back or at least vented cabinets. Only the foam or rubber-surround "air suspension" cones of later years are designed to operate in a closed box.</P>


John</P>
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[myorgan]

Re: Allen speaker cabinets



To my knowledge (limited to 2 TC-3S's and one TC-3) Allen never put backs on their speaker cabinets--including the gyros. Not sure why because it doesn't seem very efficient. Perhaps it was to help soften the blow of the fact that they were speakers instead of pipes.</P>


Having the backs enclosed helps encourage the sound to all come out the front of the speakers, even though Allen uses insulation inside their cabinets (HC-12s I'm familiar with). The dange in this, of course, is that there is so much pressure in the speakers from the woofers that they will blow out. Later speakers (HC-15s) incorporated a "tuned port" to help relieve some of the pressure created by the woofer, but the backs are still closed.</P>


I prefer the closed backs--especially when moving or mounting the speakers, which I do a lot. Someone who knows a whole lot more than me can enlighten you more, but I hope this helps in some way.</P>


Michael</P>

[Tony Pipe Milwaukee]

Re: Allen speaker cabinets



I took the speakers out of my Allen Rondo and hooked them up to the 301-C when I got it. I just have the large speaker sitting on top of the organ without any cabinet at all. Every time kitty comes around and gets a little too nosey, I put on the 32's pedal stops and the speaker shakes, scaring kitty out of the area.</P>
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[myorgan]

Re: Allen speaker cabinets



[quote user="Tony Milwaukee"] Every time kitty comes around and gets a little too nosey, I put on the 32's pedal stops and the speaker shakes, scaring kitty out of the area.[/quote]</P>


HOW CRUEL!!! Isn't that hard on the ceiling?[6]</P>

[Tony Pipe Milwaukee]

Re: Allen speaker cabinets

Kitty is declawed, just bounces off the ceiling!

[Arden]

Re: Allen speaker cabinets



[quote user="Tony Milwaukee"]Kitty is declawed, just bounces off the ceiling![/quote] </P>


Thanks all the replys. I was thinking though, since I've got four cats, maybe if I played some broken cords with the pedals, I could juggle them!!</P>


Arden</P>