The latest open baffle speakers I have put together is a 3 way Foster driver speakers. The donor driver came from a pair of Noresco NEC-571 plus a horn tweeter that I picked up from a set of Zenith Allegro speakers.
This project turned out to be spectacular with the push/pull tube amp, almost in the league of openness and fullness as the Speakerlab Super 7's, almost. The Super 7's are really an amazing loudspeaker.
The original Noresco speakers used a 10" Foster 25E33 alnico woofer with a massive magnet assembly crossed over to the Foster 8F3 three inch full range speaker. The original crossover was used as the crossover point between the woofer and the full range driver is around 650hz.
A foster horn tweeter was included to handle the high end as I found the 8F3 seemed to roll off in the highs.
A 2.2uf cap was used with a crossover point at 9000hz, it seems to have added the high end depth and sizzle that I like.
This combination came out way better than expected. Bass is full and clear, the mid range from the 8F3 is luscious and smooth, very deep and wide. the horn tweeter takes care of the highs in spectacular fashion.
Before I started this project I had an idea as to how this set up would sound, but it came out way better than I expected.
If this is what open baffles are supposed to sound like, then I am a believer now.
Aesthetics came out beautifully with the dark mahogany veneer.
This project turned out to be spectacular with the push/pull tube amp, almost in the league of openness and fullness as the Speakerlab Super 7's, almost. The Super 7's are really an amazing loudspeaker.
A foster horn tweeter was included to handle the high end as I found the 8F3 seemed to roll off in the highs.
A 2.2uf cap was used with a crossover point at 9000hz, it seems to have added the high end depth and sizzle that I like.
This combination came out way better than expected. Bass is full and clear, the mid range from the 8F3 is luscious and smooth, very deep and wide. the horn tweeter takes care of the highs in spectacular fashion.
Before I started this project I had an idea as to how this set up would sound, but it came out way better than I expected.
If this is what open baffles are supposed to sound like, then I am a believer now.
Aesthetics came out beautifully with the dark mahogany veneer.
I just found your blog. It is great! I hope you still maintain it. My email is jeffegg66@hotmail.com. My name is jeff. I have a screenshot of one of your pics with the speaker circled in yellow. Don’t know how to attach pic here. I want to know if the speaker is the superlab 7. It looks amazing.
ReplyDeleteOne more question: i have recently got into tube amps. My strong suit is sourcing geAr-cheap. I will look for 60’s consoles made by Magnavox & RCA, etc. I will use this blog and all of your links to learn the mods. In the past, I have run across old console units, but did not know the amp could be pulled and modded to such great affect, so I blew them off. I am stoked to get going.
Thanks,
ATLjeffro
Hi, email me at bankofdave@gmail.com the pictures
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