Altec 601 vs. 604

**gdmoore28** · January 10th, 2015, 04:13 PM

From where does the 601/602 - style Altec duplex speakers derive their hi frequencies? I know the 604s have their own HF drivers attached to the back of the speaker, but I don't see that on the 601/602s I've seen pictured. I've never used any of the duplex speakers, so a lot of this is totally foreign to me.

GeeDeeEmm

**bowtie427ss** · January 11th, 2015, 10:03 AM

3000 series tweeter.

https://www.dropbox.com/sh/bxpsbgncj...ull-1957-i.jpg

**gdmoore28** · January 16th, 2015, 06:57 PM

Danke. I appreciate the info.

GeeDeeEmm

**604man** · January 17th, 2015, 02:27 AM

A friend of mine has A pair of 602-D's . Not as efficient as A 604 but close and the 3khz
crossover freq is rather high . Like the 604, You need to listen on axis.. In all, a nice
sounding speaker..........GC

**Old Guy** · January 17th, 2015, 05:18 AM

I never understood why the lower priced duplex were constructed the way they were. Seems like with the 3k crossover the Biflex cone would have been a better choice.

**604man** · January 17th, 2015, 07:13 PM

I am surprised the Lowther geeks never pursued the Biflex series speakers.
.............GC

**juniper** · January 25th, 2015, 11:03 AM

Missed a pair of mint 601c's at the local action for 58 a piece... wish I had use for them.

**604man** · January 27th, 2015, 02:47 AM

Altec 601-C with Family King JR30 cab Go here;

Family King JR30+ALTEC 601C UTOPIA HiFi-Do McIntosh/JBL/audio-technica/Jeff Rowland/Accuphase

............GC

**SamCogley** · April 10th, 2015, 12:27 PM

Originally Posted by Old Guy

I never understood why the lower priced duplex were constructed the way they were. Seems like with the 3k crossover the Biflex cone would have been a better choice.

Having owned both 601As and the 12" BiFlex, the answer is simple. The BiFlex is comparatively awful.