GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Living Voice Loudspeaker

Post Subject: AK151 and K15/40 DifferencesPosted by jessie.dazzle on: 9/17/2009

Romy's comments in blue :
"...Interesting, as all my drivers, the AK151 and K15/40 are high impedance (15R-16R, DCR around 12R). I do not see a lot of difference between AK151 and K15/40..."

Apart from the color the baskets were painted (silver Hammerite for the AK151 and bronze Hammerite for the K15/40), the only difference between the two is the resistance of the voice coil. The original cone replacement kits were interchangeable, meaning it was possible to convert an AK151 to a K15/40, and vice-versa.

"...I think that 8 Ohm coil for Vitavox voice coil was a Vitavox fantasy based upon the facts they needed to integrated it in System 191 and they did not what to burn too much power on MF voltage divider..."

I might be totally wrong, but I just assumed that Vitavox's decision to specify a lower impedence voice coil for horn-loaded applications was related the additional load placed on the driver once mated to a horn, resulting in an increase in impedence as seen by the amplifier (???).

"...The originally intended? Who cares!!!!..."

I completely agree, and, for my own project, will use the driver that sounds best with a 40Hz exponential horn. I have both versions of this driver, and have listened to them both in an A/B situation, out of the horn; I remember noting the main difference was in dB (output level), but will reserve judgement for the day I hear them both in the completed horns.

jd*

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