dbx 3BX- Vintage Audio Review Episode #136

In this episode I look at a dbx 3BX Dynamic Range Expander- its performance & features. Email your question(s) to: [email protected] 00:00 Introduction 03:49 “Tour” 06:23 Measurement Data Starts-THD/SNR with unit bypassed 07:11 THD/SNR- Expansion set to 0, Transition Level to min. gain 07:45 THD/SNR- Expansion set to 1.25, Transition Level to 0dB gain 08:21 THD/SNR- Expansion set to 1.5, Transition Level to 0dB gain 08:43 THD/SNR- Expansion set to 1.25, Transition Level to midpoint gain 09:10 THD/SNR- Expansion set to 1.25, Transition Level to max gain 09:30 Frequency Response- Expansion set to 1.0, Transition Level to min. gain 10:06 Frequency Response- Expansion set to 1.25, Transition Level to min. gain 10:26 Frequency Response- Expansion set to 1.5, Transition Level to min. gain 10:59 Frequency Response- Expansion set to 1.0, Transition Level to min. gain 11:20 Frequency Response- Expansion set to 1.0, Transition Level to max gain 11:30 Frequency Response- Expansion set to 1.10, Transition Level to min gain 11:40 Frequency Response- Expansion set to 1.10, Transition Level to 3 from left 11:30 Frequency Response- Expansion set to 1.10, Transition Level to min gain 12:08 Frequency Response- Expansion set to 1.20, Transition Level to min gain 12:21 Frequency Response- Expansion set to 1.20, Transition Level to I gain 12:29 Frequency Response- Expansion set to 1.20, Transition Level to max gain 12:55 System Noise 13:34 THD vs Freq & Input level 14:57 Crosstalk 15:23 Multitone Response 15:44 THD/SNR- Expansion set to 1.2, Transition Level to II, 2VRMS input signal 16:39 Using the 3BX 17:45 Comparing LP recordings made with/without 3BX 21:47 Listening/ Final comments