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where to buy more efficient 5" driver for book shelf speakers?

Posted by Kipp (A) on June 23, 2015 at 23:53:26

I have TAD 805SD bookshelf speakers which are inexpensive and very similar to Bowers & Wilkens 805's. They are the best speakers I've ever had, and I run them with a typical 30 watt EL34 vacuum tube push-pull amp (Cayin TA30- similar to Prima Luna amps).

I may get bashed for this, but I want to get a SET amp and try to run these speakers- I was thinking something like BottleHead Pamamount 1.1 (300B) SET amp. I was thinking of modifying my speakers by substituting more efficient drivers because the current drivers are probably too inefficient for SET amps. I don't have the space or money to get some Klipsh or Altec type speakers right now. My speakers are rated at 87db. Where can I shop for replacement 5" drivers (forget the tweeter- I can't hear that high!) that are more efficient (and might also sound better)? The stock drivers are nominally about 5", approx 1" voicecoil, center protruding fixed cone, and speaker cones are curved cross section, look like yellow fiberglass (see pictures). There is no info at all written on the stock drivers. I don't think I'm even using the tweeters, so no cross-over issues. (could probably also benefit from some better internal speaker wire)

specs:
8 Ohm
87db
internal volumne: approx 0.64 cu ft, 18.2 liters
port ID: 1.75", 4.5cm
port depth: 2.3", 6cm
enclosure: 1/2" MDF, curved sides and top.

Any thoughts or advice appreciated. Thanks, Kip.......
Dr. Feickert Blackbird w Reed 2A tonearm, Linn LP12, Ittok, Lyra Skala, Lingo, Garrard 301, Audio Note DAC 2.1, BeePre, Bottlehead Eros 2 phono stage, BottleHead Paramount 1.1 monoblocks, Altec A7 VOTT, Fostex 168FE sigma in Nagaoka folded horn

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