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Double-Back-Loaded Folded Horns

Posted by thetubeguy1954 on January 15, 2012 at 12:06:16:

Hello Robert,
Whereas I have not built the Fostex BK12 kit from Madisound. I believe I'm still in a postion to help answer some of your questions because I use a pair of Fostex FE208ES-R drivers in Sachiko double-back-loaded folded horns with a Mastersound Reference 845 40W/ch SET, integrated amp, as seen above. So believe me you really cannot have too much power with any speaker. One time I had a person loan me a 10W/ch SET that he wanted me to audition and them tell him what I thought of it sonically. So I used it in place of my amp with the Sachikos and in all honesty it really sounded very, very nice indeed. However it was also quite noticeable that it couldn't handle the dynamics swings or duplicate the transient response of the more powerful 40W/ch SET amp. With the 10W/ch amp whenever there was a large dynamic swing it caused the music to start sound congested and strained as the dynamic swing hit it's peak, but when the same music was played with the 40W/ch the dynamic swing was played as unstrained as the softer music was.
If you want to know how what I'm about to tell you occured and why, feel free to ask me and I'll explain, but in an effort to keep this post brief let tell you that with my 40W/ch, SET amp, I'm now capable of hitting 110dB on peaks on music that's averaging 88dBs and that's with absolutely no sign of strain or distortion heard in the sound! I could never do that with a smaller amp. So I say keep that 55W/ch amp with your Fostex BK12 kit. Just use your power judiciously and make sure you're not ever pushing your speakers to the point where you're damaging them ---{if you listen you should hear the music start to sound strained and congested before that damage occurs}--- and you'll absolutely love the way your 55W/ch effortlessness plays music through these Fostex BK12 folded horns.
Now as far as your $400 limit goes ---{if $400 is your absolute limit}--- I personally believe you'll be able to get either better folded horns used and if you cannot find better folded horns used, I'd either look for into purchasing Madisound's BK20 cabinets for 8" Fostex drivers as seen here: http://tinyurl.com/Madisound-s-BK20-Folded-Horns or I'd consider perusing through Frugal Horn at their many FREE plans availble for building single and double back-loaded horns as seen below!
Finally Robert let me know if I can help you in anyway. I still remember when I first got my back-loaded horns almost 2.5 years ago now and it was the best audio move I ever made. I just wished I had found out about these types of speakers sooner! Just remember there's good and bad in everything. I don't know about the BK12's so I cannot speak about them, but I personally prefer using 8" fullrange drivers because you can get some real bass from them. Robert I was so excited about getting my horns and I'm excited for you! If I can I'll help you can drop me an email at this email address: thetubeguy1954@yahoo.com
Thetubeguy1954 (Tom Scata )
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns
Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
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"The man that hath no music in himself, nor is not moved with the concord of sweet sounds, is fit for treasons, deceptions, and spoils;
The motions of his spirit are dull as night and his affections dark as Hell. Let no such man be trusted."
- William Shakespeare from The Merchant of Venice; Act V,i