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In the Forum: Horn-Loaded Speakers
In the Thread: Deep End DIY - Australian take one Macondo.
Post Subject: All about the bassPosted by anthony on: 10/24/2025
The higher SPL tuning of the Melquiades filters give me tremendous bass flexibility on which I am yet to capitalise.
Currently, my installation has four bass channels, only the lowest is not driven by Melquiades:
re">Upperbass 100Hz - 1kHz - time aligned
re">Midbassre">50Hz - 100Hz - delayed 45cm/18"
re">Bass Cannons <60Hz - time aligned
re">Infrabass <30Hz - close to time aligned
That extra 14dB SPL from the Bass Cannons and Midbass channels thanks to the new higher output impedance preamplifier really open up possibilities to drive bass from different positions in the room. For instance, I am completely sold on driving midbass frequencies from behind the listening chair and with the preamp change now have 5dB in reserve in that frequency range so can experiment with new filters and/or with a high nickel content output transformer given what the channel adds to the sound.
The Bass Cannons, positioned where they are in the room have a frequency response of 10Hz-100Hz +/- 1.5dB unsmoothed, which is super-extraordinary, but they need more horsepower for those low frequencies and if driven by the 400w Class AB amps I built could be revelatory, or rubbish, in conjunction with or replacing the current Infrabass Channel. That would free up a two stage Melquiades Channel for HF duties perhaps even with Tannoy Red tweeter.
Then there is the Upperbass Channel...it and the MF really are the heart of the entire system, and I would like to experiment with a high nickel content OPT as there is still plenty scope to lessen attenuation on that channel.
There are probably further scenarios of how bass could be produced in the room that I am yet to consider, but they are made possible by the change in preamplifier.Rerurn to Romy the Cat's Site