Wow - here I am writing my first post on ASR...and it will be a pretty basic one, I know.
Let me get right into it.
My setup:
Room is around 24 sqm.
Google TV - Spotify Streaming via Toslink
Raspberry Pi 4b + Hifiberry DAC+DSP -> Crossover + PEQ + Phase Adjustments designed in Sigma Studio. HPF forwarded via Toslink to Fosi GR40 DAC, LPF via Hifiberry DAC via RCA as a mono to the SUB.
Subwoofer: single SVS SB-1000. Sub is placed on the opposite wall to the speakers - this provided the flattest response curve in the bass region.
Mains: Monitor Audio Bronze 2 - producers specs claim they go down to 42 hz and I do hear that setting the LR24 to e.g. 65 Hz limits them significantly.
AMP: NAD 701 -> plugged into Main In directly from the Fosi GR40.
Measuring Mic: Dayton Audio Imm-6 plugged into my PC via Apple USB-C dongle. Raspberry Pi is the source sweep for the REW - I use acoustic timing reference.
Main use: music listening, sometimes movies.
My issues:
0. I will welcome any comments regarding the setup - potential weak points/easy wins/hiccups.
1. Confirming the right configuration sequence. Based on other posts, I should: 1) set-up the crossover frequency, 2) align phase via delay in Sigma Studio, 3) apply room correction PEQ. I guess that is broadly correct?
2. Crossover frequency: After experimenting quite a bit I think about two options: 1) simple 80 Hz crossover with LR24 on both ends, 2) overlapping crossover: subwoofer set to around 65 Hz, the mains at around 30 Hz. Option 1 seems like relatively easy to move forward with, however I am a bit reluctant to go this way because before acquiring the DSP, I have used the RCA crossover on the SVS SB-1000 fixed at 80 Hz and it sounded hollow in the mids. Given that, option 2 seems appealing, however I am not sure how to conduct the phase adjustment in this scenario.
3. Phase adjustment - biggest black box for me: What is best procedure for a 2.1 system like mine? I assume I should take separate and combined measurements and analyze the overlayed SPL graphs for any potential negative interference. Should I focus on the crossover frequency? What to do when I have overlapping crossover - do I focus on the sub's crossover only in this case? Is SPL analysis sufficient for correct phase adjustment or do I want to rely on other tools - phase diagram, impulse response? Can I even get a decent phase diagram with an Apple USB-C dongle?
4. How important is phase adjustment for my crossover selection? I am still undecided which crossover frequency sounds best and I wonder whether I have to dial the phase in anytime I am experimenting with a new crossover frequency to fully compare or can I just decide on the crossover alone?
I will appreciate any answers. I will post my measurements later on - unfortunately I am not at full liberty to run sweeps too often in a household of two
Let me get right into it.
My setup:
Room is around 24 sqm.
Google TV - Spotify Streaming via Toslink
Raspberry Pi 4b + Hifiberry DAC+DSP -> Crossover + PEQ + Phase Adjustments designed in Sigma Studio. HPF forwarded via Toslink to Fosi GR40 DAC, LPF via Hifiberry DAC via RCA as a mono to the SUB.
Subwoofer: single SVS SB-1000. Sub is placed on the opposite wall to the speakers - this provided the flattest response curve in the bass region.
Mains: Monitor Audio Bronze 2 - producers specs claim they go down to 42 hz and I do hear that setting the LR24 to e.g. 65 Hz limits them significantly.
AMP: NAD 701 -> plugged into Main In directly from the Fosi GR40.
Measuring Mic: Dayton Audio Imm-6 plugged into my PC via Apple USB-C dongle. Raspberry Pi is the source sweep for the REW - I use acoustic timing reference.
Main use: music listening, sometimes movies.
My issues:
0. I will welcome any comments regarding the setup - potential weak points/easy wins/hiccups.
1. Confirming the right configuration sequence. Based on other posts, I should: 1) set-up the crossover frequency, 2) align phase via delay in Sigma Studio, 3) apply room correction PEQ. I guess that is broadly correct?
2. Crossover frequency: After experimenting quite a bit I think about two options: 1) simple 80 Hz crossover with LR24 on both ends, 2) overlapping crossover: subwoofer set to around 65 Hz, the mains at around 30 Hz. Option 1 seems like relatively easy to move forward with, however I am a bit reluctant to go this way because before acquiring the DSP, I have used the RCA crossover on the SVS SB-1000 fixed at 80 Hz and it sounded hollow in the mids. Given that, option 2 seems appealing, however I am not sure how to conduct the phase adjustment in this scenario.
3. Phase adjustment - biggest black box for me: What is best procedure for a 2.1 system like mine? I assume I should take separate and combined measurements and analyze the overlayed SPL graphs for any potential negative interference. Should I focus on the crossover frequency? What to do when I have overlapping crossover - do I focus on the sub's crossover only in this case? Is SPL analysis sufficient for correct phase adjustment or do I want to rely on other tools - phase diagram, impulse response? Can I even get a decent phase diagram with an Apple USB-C dongle?
4. How important is phase adjustment for my crossover selection? I am still undecided which crossover frequency sounds best and I wonder whether I have to dial the phase in anytime I am experimenting with a new crossover frequency to fully compare or can I just decide on the crossover alone?
I will appreciate any answers. I will post my measurements later on - unfortunately I am not at full liberty to run sweeps too often in a household of two
