Searched this forum with not much luck on this topic & looked online with no joy. Figured just start a new thread. Here would be the audio signal path from this 2.1 preamp:
Echo Dot - Preamp - Chip amp for the 2-way passive & then for the subwoofer the following from the Preamp:
This DSP low frequency controller Dayton Audio DSP-LF Low Frequency DSP Controller and onto a similar mono chip amp, preferably plate amp, but these are scarce as well, but the mono amps can be found easily enough.
As always thanks for your responses.
Echo Dot - Preamp - Chip amp for the 2-way passive & then for the subwoofer the following from the Preamp:
This DSP low frequency controller Dayton Audio DSP-LF Low Frequency DSP Controller and onto a similar mono chip amp, preferably plate amp, but these are scarce as well, but the mono amps can be found easily enough.
As always thanks for your responses.
I'll try to answer these the best I can, but I'm quite the novice.
1 - Single 3.5mm TRS Stereo line level. They do have bluetooth available, but not interested.
2 - On my present setup, no. It uses a TPA7492 2x25W. But the speaker is a simple 2-way, but I think its sensitivity is only 81dB. When I use my TPA311X amplifiers, they really sound better with my tube pre-amp, although the 3116 & 3118 do fine for volume. The TPA3110 is the only one that would need some gain & ironically, it is the best of all my chip amps, although it is a Texas Instrument Evaluation Board of very good quality.
3 - I'm not too sure how to answer this one. The DSP-LF will be used to implement the active cross over, but I'm not sure it will affect the high pass on the 2-way speakers, because it appears that the DSP-LF is somewhat separate from the 2-way as I envision it in the signal path. I guess my first guess would be that the 2-way gets the full-range signal. Actually, this is a good question, which needs verified from the manual. I'll do some reading & get back to you. If it doesn't then I would have to design in a High Pass filter on my 2-way design, that would work well with subwoofer?
1 - Single 3.5mm TRS Stereo line level. They do have bluetooth available, but not interested.
2 - On my present setup, no. It uses a TPA7492 2x25W. But the speaker is a simple 2-way, but I think its sensitivity is only 81dB. When I use my TPA311X amplifiers, they really sound better with my tube pre-amp, although the 3116 & 3118 do fine for volume. The TPA3110 is the only one that would need some gain & ironically, it is the best of all my chip amps, although it is a Texas Instrument Evaluation Board of very good quality.
3 - I'm not too sure how to answer this one. The DSP-LF will be used to implement the active cross over, but I'm not sure it will affect the high pass on the 2-way speakers, because it appears that the DSP-LF is somewhat separate from the 2-way as I envision it in the signal path. I guess my first guess would be that the 2-way gets the full-range signal. Actually, this is a good question, which needs verified from the manual. I'll do some reading & get back to you. If it doesn't then I would have to design in a High Pass filter on my 2-way design, that would work well with subwoofer?
According to the manual you're suppose to use this with an AV receiver or =.
"Input Audio Signal -Connecting the DSP-LF to a typical AV receiver is easy. Simply use the provided RCA to 3.5 mm cable by plugging the RCA end into the 'sub out' port on your AV Receiver (AVR) and the 3.5mm end into the input side of your DSP-LF. It is okay only to use either the red or white RCA plug, and leave the other one unused, but you can also use an RCA Y Adapter that is 2 Female to 1 Male to eliminate this."
And, yes I would mostly likely need to implement a High Pass on the 2-way according to the manual. "Although it’s possible to get a good response without high passing your mains, the iWoofer (software for the DSP) room correction algorithm cannot account for the bass response of your mains, which is why we recommend high passing them."
"Input Audio Signal -Connecting the DSP-LF to a typical AV receiver is easy. Simply use the provided RCA to 3.5 mm cable by plugging the RCA end into the 'sub out' port on your AV Receiver (AVR) and the 3.5mm end into the input side of your DSP-LF. It is okay only to use either the red or white RCA plug, and leave the other one unused, but you can also use an RCA Y Adapter that is 2 Female to 1 Male to eliminate this."
And, yes I would mostly likely need to implement a High Pass on the 2-way according to the manual. "Although it’s possible to get a good response without high passing your mains, the iWoofer (software for the DSP) room correction algorithm cannot account for the bass response of your mains, which is why we recommend high passing them."
Something doesn't "jive". A HT S/W line is not stereo. Why stereo interconnect cables? Perhaps the vendor is simply saving money.
To realize a small amount of line stage gain, 1 of the numerous 12B4 based designs in the archives of this "board" will do.
You need an electronic crossover that sums the bass info. to mono, while leaving the non-LF info. stereo. 2X of this Marchand Electronics PCB will take care of the frequency band splitting. Marchand's XM-1 manual shows how to get the single LF line that would feed the DSP.
To realize a small amount of line stage gain, 1 of the numerous 12B4 based designs in the archives of this "board" will do.
You need an electronic crossover that sums the bass info. to mono, while leaving the non-LF info. stereo. 2X of this Marchand Electronics PCB will take care of the frequency band splitting. Marchand's XM-1 manual shows how to get the single LF line that would feed the DSP.