![I ran a a 80Hz test tone threw my Topping D10 DAC to my Marantz preamp to the sub output. : r/audiophile I ran a a 80Hz test tone threw my Topping D10 DAC to my Marantz preamp to the sub output. : r/audiophile](https://external-preview.redd.it/w4bgqv_FOIw2Q0HTaA8_ZybdbKED7Yq6orrVrClyG6g.jpg?width=640&crop=smart&auto=webp&s=399995dd752cb103b94cb69a1fa7d9137576bd18)
I ran a a 80Hz test tone threw my Topping D10 DAC to my Marantz preamp to the sub output. : r/audiophile
![2 The level in decibels above threshold of a 1,000-Hz tone (ordinate)... | Download Scientific Diagram 2 The level in decibels above threshold of a 1,000-Hz tone (ordinate)... | Download Scientific Diagram](https://www.researchgate.net/publication/226249127/figure/fig2/AS:393867200352266@1470916666694/The-level-in-decibels-above-threshold-of-a-1-000-Hz-tone-ordinate-that-sounds-as-loud.png)
2 The level in decibels above threshold of a 1,000-Hz tone (ordinate)... | Download Scientific Diagram
![Setting The Crossover Frequency; Setting The Test Tone - Denon AVR-1707 Operating Instructions Manual [Page 50] | ManualsLib Setting The Crossover Frequency; Setting The Test Tone - Denon AVR-1707 Operating Instructions Manual [Page 50] | ManualsLib](https://static-data2.manualslib.com/docimages/i/23/2284/228311-denon/50-setting-the-crossover-frequency-setting-the-test-tone-avr-1707.jpg)
Setting The Crossover Frequency; Setting The Test Tone - Denon AVR-1707 Operating Instructions Manual [Page 50] | ManualsLib
![Spectrum of the 'ebass' test tone including electric bass and bassdrum... | Download Scientific Diagram Spectrum of the 'ebass' test tone including electric bass and bassdrum... | Download Scientific Diagram](https://www.researchgate.net/publication/229037482/figure/fig3/AS:669543370326017@1536642987047/Spectrum-of-the-ebass-test-tone-including-electric-bass-and-bassdrum-sounds.png)