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Showing results for tags 'crossover'.
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I am investigating using high-pass crossovers with Quad ESL63s to roll-off the bass so as to not compete with my B&W DB1 subwoofer. I am using a Musical Fidelity M6si 200W/channel amplifier and considering crossovers in the range 70 to 100Hz with 12dB/octave roll-off . Is there anyone with experience of this approach?
After considering a purchase of a Minidsp unit for a while, I recently bought a Minidsp 2x4HD unit from Luke (insider9) of this parish. It was purchased mainly to act as an active crossover to my Quad ESL63 and Gradient SW63 subwoofer combo. Gradient supply an active crossover with the subs and although it works quite well, you do lose some of the immediacy of the Quads. Another option that I tried, following a well known tweak from the internet, was to use the Gradient crossover to the subs but to use a single in-line capacitor in circuit to each of the Quads. This opened up the sound from the Quads but the overall sound was less seamless - you could hear that each channel was coming from 2 separate units. I therefore went back to using the Gradient crossover, but knew that greater transparency/immediacy should be possible. Enter the Minidsp unit. Despite being a novice in things dsp, after reading the setup notes, I was able to configure the software to set the crossover frequency of a nominal 110hz and create left and right outputs to the Quads and again to the subs. I was able to choose the crossover type that allows a 6db per octave boost on the subs (required due to them being open baffle dipoles). I then read that the Gradient crossover has a sharp reduction in output below 28hz, as the subs are not flat below this frequency. After a further bit of reading I found that I could set something called a low-step filter in a tab called 'parametric equalizer' on the output to the subs, to achieve this. The Minidsp is doing what I hoped it would do - greater immediacy with a seamlessness between the Quads and the Gradient. As has been said before, a great strength is to be able to try different settings on the fly e.g different crossover points/frequencies, different output levels on the subs. There is also the facility to store different configurations in four different presets. I have also been able to store functions such as volume up/down, presets 1 to 4, on my Sony TV remote. That has enabled me to hear the difference, the touch of a button, between using a crossover point of 110hz, 115hz, 120hz etc. It also gives me the ability to have 2 presets which are identical apart from one being in positive phase, the other in inverted phase (for those who, like me, hear the difference from one recording to another). I can therefore switch from positive to inverse phase and vice versa, at the touch of a button. In summary, a very worthwhile purchase and I can also look forward to a future purchase of a Umik-1 microphone and using the free REW software to carry out room correction or even buy the Dirac software. Oh, one last thing to mention was the excellent transaction with Luke, yet another example of a fine, trustworthy Wammer. It was a real pleasure to do business with him.