HIFI4EVER Posted August 27, 2016 Share Posted August 27, 2016 I have some Speakerlab K's now and they are not getting the bass I'd like. I tried the BOSE 901 series 1 eq on them and it really woke them up, but I only want that enhanced bass. There used to be a loudness button on stereos, and later on was "super bass" . I use 2 QSC bridged 1400 amps and a QSC preamp that is pretty universal, but I'd really like to get that extra punch. Any ideas on how to do it? Quote Link to comment Share on other sites More sharing options...
HIFI4EVER Posted August 27, 2016 Author Share Posted August 27, 2016 Maybe something like this? http://www.eleccircuit.com/transistor-stereo-bass-booster/ Quote Link to comment Share on other sites More sharing options...
efzauner Posted September 3, 2016 Share Posted September 3, 2016 Most stereo audio amps, and many HT receivers even have a bass/treble control when listening to stereo sources. Maybe just an old graphics equalizer in your preamp/PA loops could do the trick? I see many for sale in online classified ads. Quote Link to comment Share on other sites More sharing options...
chriswhotakesphotos Posted September 5, 2016 Share Posted September 5, 2016 An EQ would do it, as would a different preamp. The Adcom GTP-500 I use has defeatable tone controls as well as a contour/loudness button. Personally, I'd be more likely to use a preamp with tone controls than a separate EQ unit. In my mind (and hopefully someone can tell me if I'm wrong,) a well-designed preamp will have more neutral sounding tone controls than a graphic EQ, which might degrade the sound noticeably depending on the one you find. Patching in the tone control on my preamp is supposed to defeat the direct-coupling that is one of its main features, but the difference in sound is so minute that it could actually be placebo. It does reduce ground loop noise, which is an unexpected but welcome feature! Quote Link to comment Share on other sites More sharing options...
babadono Posted September 14, 2016 Share Posted September 14, 2016 I use this Quote Link to comment Share on other sites More sharing options...
HDBRbuilder Posted October 9, 2016 Share Posted October 9, 2016 Back in the day, Harman/Kardon put what is called a "contour" switch on their SS receivers. This differed from the "loudness" control in that as the amplifier section worked harder as the volume control was increased, the contour effect became less. If I remember correctly, as less efficient speakers came along, H/K filled a need with its contour switch to supply more oompf to the speakers in specific frequency range bands which tended to need more power to compensate for sonic accuracy at lower volume settings. As the volume was turned up, the contour effect lessened to a point where it was doing pretty much nothing once the volume control got to a certain point. There are other tech guys on this forum who may be better able to explain the difference between the contour and loudness controls, so go to it brothers and sisters! 1 Quote Link to comment Share on other sites More sharing options...
oldenough Posted October 10, 2016 Share Posted October 10, 2016 Thanks for pointing that out about the "contour" switch HDBR, I have always felt that it operated differently, and that there was a good reason for it not being labeled "loudness" as every other manufacturer does. It would be interesting to know what the technical differences are. Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted October 10, 2016 Share Posted October 10, 2016 A room FR would be nice to pinpoint the problem and then something like a Mini DSP could be used. It is fairly cheap and will allow you to contour the bass FR to fit the room. Quote Link to comment Share on other sites More sharing options...
djk Posted October 10, 2016 Share Posted October 10, 2016 " the difference between the contour and loudness controls, so go to it brothers and sisters! " The HK were no different than the others. The HK430 with the contour (loudness) on would clip on FM before the volume control hit the 10 o'clock position (I still own a 430, and bought my father a 730, which my brother absconded with). Yamaha and McIntosh had variable loudness controls, those two were different. The APT preamp had a bass control with a turn-over switch designed for loudness use, it sounded quite good in that function. Quote Link to comment Share on other sites More sharing options...
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