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In Reply to: RE: where to buy more efficient 5" driver for book shelf speakers? posted by Paul Joppa on June 24, 2015 at 08:15:08
Bill, Paul (I recognized the name), and Dave: thanks.
I have to apologize- I discovered that the TAD 805 enclosure has a solid false bottom, and actual internal volumne is 959 cu in (0.55 cu ft, 15.7l). I'm guessing that effects your calculations, and if you had a moment to re-calculate, thad be awesome.
I noticed the FE126E, and also that it's rated at 93db! Would have to make an adapter to fit it since it's smaller. Also considering the Fostex BK12 complete speaker kit, but I believe the shape of the 805SD enclosure may be why I like it so much. Also Tang Band D4-1 kit looks interesting.
Bass response. I remember in the 70's visiting Pacific Stereo stores. Very large enclosures, and if ya wanted to go "first class", get the 5-way ones! Loud, powerful, thumping bass. ELECTRIC bass. Bass dominated the music, like Bob Marley, or some disco. Not interested in that.
Lately listening to a lot of 60's honky tonk- there's a lot of excellent, in-studio recorded stand-up bass. Charlie Louvin's "I'm No Longer in Your Heart" a really good example. Does not shake your pant legs or rattle the windows, but it does fill the air with beautiful harmonics. So smaller speakers may be fine for me. Also, I think most of the recorded music information is in an area that is way above the lower and way below the upper thresholds of hearing (especially mine).
Linn Sondek LP-12, Lingo PSU, Ittok LVII arm, AT OC9ML cart, Audio Origami lead, scratch-built tube phono stage with separate power supply (design by inmate NAZ!), Cayin TA30 integrated tube amp (with Bizzy Bee mods), TAD (Bizzy Bee) 805SD speakers.
Follow Ups:
Back loaded horns will sound quite different compared to sealed or ported boxes - in fact they are a taste I have not acquired, though sometimes the advantages outweigh the problems. Just a cautionary note.
Given the music mentioned - smaller scale acoustic - you might even be happy with your existing 87dB speakers, especially if you go for a 5-10 watt 300B amp. It at least allows you to make a valid comparison between amps, separated from comparing speakers. In a small room, I use 89dB speakers with a 2-watt amp for DVDs, and I always have tons of headroom available. (OK, in the big rig it's 101dB speakers and 8-watt amps ... I do like my Mahler!)
Paul:
I'm confused. On your main listening setup you are not using a back loaded horn? Sounds like you are using a SET amp using a 300B(?) I would have thought a 101 db speaker would be a back loaded horn. I'm always curious to know what setups work. Thanks again, Kip.....
Linn Sondek LP-12, Lingo PSU, Ittok LVII arm, AT OC9ML cart, Audio Origami lead, scratch-built tube phono stage with separate power supply (design by inmate NAZ!), Cayin TA30 integrated tube amp (with Bizzy Bee mods), TAD (Bizzy Bee) 805SD speakers.
JBL 2220 woofers, possibly the most efficient direct radiator available. 2440 compression drivers on top, crossed at 800Hz. Inappropriately small boxes which I got for free ... so I have 10" subs under the 15" woofer! Yeah, it's not the ne plus ultra but it makes music. Kind of a vintage-pro sound.
Yes, the amps are 300Bs - I often wind up with Bottlehead prototypes once things are in production.
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