DIY Loudspeakers: HOME INDEX UPDATES RESPONSE WHAT'S NEW
|
Hypex FA251 or FA501
used as power-amp for bi-amping |
An easy way to operate your speakers by bi-amping is to use the Hypex FA251 or FA501 as a power amplifier without any use of the DSP facility. As least for a beginning. Later it may be advantageous to add a little bass lift at e.g. 30-35Hz - and for vinyl lovers, a 2nd order high-pass section at 20 Hz helps greatly protecting your speakers and power amplifier for any very-low frequency accidents. It goes without saying you need a pair of speakers with bi-wiring/bi-amping terminals. That is FOUR binding posts, two for mid-tweeter and two for bass. This means the crossover is have separate boards for the two sections. Usually this is done for bi-wiring, having one pair of wires for mid and tweeter and one pair of wires for the bass.
With the program for download here, the gain knob should be in the middle, click position, to match your power amp. Had some oak leftovers and made a pair of boxes with speaker terminals. Here the FA501, blue+red for PLUS and grey+black for MINUS. Download software here. Unpack zip file on place folder in FilterData in My Documents. Preset 1 with flat response and sub-filter. Preset 2 with 3 dB lift @ 35 Hz and sub filter. Preset 3 with 6 dB lift at 35 Hz and sub filter. |