I use a Pono player to feed a balanced signal to a Texas Instruments TDA3255EVM class-D chip amp which drives a pair of DIY Supers made to @ClaudeJ1‘s recipe. The balanced output from the Pono player is split to also send balanced signals to a pair of iNuke 1000dsp amps, each of which drives a pair of DIY Exodus Anarchy tapped horn subs. In my small space, the subs (Lil’Mike says they’re flat to 25Hz) provide plenty of low frequency energy. Nonetheless, I can’t help but think the delay between the Supers and the subs is something to be avoided.
Inserting DSP between the Pono and the 3255 seems problematic, due to the balanced inputs of the 3255. Perhaps a pair of 2-channel DSP units, one for each balanced channel, would work.
I can hear the question being asked, “Why balanced?” The answer is because I can, and because I think it sounds better. Everyone, as in ALL, who has listened to both balanced and single ended output from a Pono player using my Sennheiser cans, preferred balanced. The sound is universally described as “3-D,” wider soundstage, deeper soundstage, better separation and localization of Instruments, etc. While intuitively such subtleties are likely more apparent using headphones (with no time delay issues) it seems the same benefits would also be observable, albeit to a lesser degree, through speakers.
Also you might ask, “Why Pono?” Despite the complete failure of Neil Young and Pono as a revolution in listening to music, it works very well in my system as a preamp with an excellent ESS Sabre DAC. While the Pono can provide single ended output to my amps in single ended mode with excellent results, the facts that Pono, 3255s and iNukes are designed to operate in balanced configuration, and that balanced sounds better, at least through headphones, makes it seem a shame to waste that opportunity.
Can dsp be inserted in the outputs of the 3225 to delay the signal to allow the TH subs to catch up?
Can dsp be inserted in the inputs before the 3255?
Any suggestions as to how to implement this?
The attached photo shows the inside of the case containing the 3255 and the Meanwell power supply. Although difficult to see from the photo, the inputs are via XLR terminals (+, -, and shielded ground). Inside the case, before going to the 3255, those signals are split to send to the inNukes via cables at the rear of the case. It seems to me that dsp units could be external to the case but inserted into the inputs or outputs in such a way was to delay the upper frequencies to be aligned with the subs.
What do you think? Is it even a problem?