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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: I've been wrong before ... and about bigger things. I did listen to a BBE & but don't recall the model number posted by Richard BassNut Greene on March 16, 2007 at 13:47:27:
dbx 117: ca. 1974. First of the dbx single band consumer expanders. Audible pumping unless set to around 1:1.4. Bass sometimes caused expander to function on highs where it should not have.
dbx 118: ca. 1977. An improved version of the 117. Slightly better performance overall. Used it for 4 years with mixed results. Had a positive effect on many recordings if not set much above 1:1.4
dbx 3bxDS: ca. 1985. The epitome of consumer expansion devices with three independent bands and "impact" recovery. Excellent results overall. Sold when I made a "temporary" foray into cd. Mistake!
dbx 120: ca. 1987. Subharmonic Synthesizer. Poor performance right from the start. Returned to dealer.
Audio Control Phase Coupled Activator: ca. 1989. Better than the 120 but still unsatisfactory. Used briefly.
BBE 462: ca. 1996. Convincing, fairly natural sound best with such lifeless dogs as "Benefit" and "Aqualung" (Jethro Tull). Let down by carbon resistors, Polyester and ceramic capacitors and TL072 op amps. I saw the potential so gutted it. Went with matched metal film resistors, matched PPS and PP caps., tantulum op amp bypasses, OP-285 op amps (selected low offset OP-275), Matsushita FC electrolytics, LT low-noise regulators and Schottky rectifiers among other things. Finally, exact calibration to spec. using Bourns 25 turn cermet trimmers. Zero audible noise and judicious setting yielded amazing results with last resort recordings both on vinyl and cd.
BBE 482: ca. 2005. Updated 462 with 2% metal film resistors and low-noise op amps (believed to be NJR 2068) incorporated on BBE ASIC, 28-pin chip by NJR. Automatic calibration. I performed the usual updates. I still prefer the 462, which probably due to my improvements, sounds slightly better overall.
TC Electronics (Dynaudio Denmark) TC300 Dynamic Range Controller: ca. 2006. An experiment that convinced me not to return the unit, although it presently is not in use. Software controlled expander with multiple algorythums. Actually betters the 3bxDS which is an amazing feat. Very natural presentation even if set for aggressive expansion ratios.
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Follow Ups
- Here's my summary of signal processors I've lived with - nightdoggy 14:57:33 03/16/07 (1)
- Forgot One! - nightdoggy 15:18:13 03/16/07 (0)
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