I used a DQLP-1 between 1981(started with my Acoustat Model 3's), until 2005(with a wide variety of planars, mostly Maggies). I never found a more transparent unit(many mods over the years), until the TacT RCS 2.2X came along. If you don't have the Dahlquist manual, with it's crossover point/amplifier input impedence matching chart/formulas: Get one and pick/configure your points intellegently. Try calling Frank Van Alstine (651-330-9871), as he could probably either supply one or direct you to a source. He's modded hundreds of those units, and knows them like the back of his hand.
Dahlquist LP-1 Passive/Active crossover
Does anyone have any expereince using the Dahlquist LP-1 Passive/Active crossover in place of the stock passive crossover with Magnepan 20R speakers? I have been using a Bryston 10B "standard" active crossover to replace the passive crossover in my 20Rs setting the high pass at 300Hz/6db slope, and the low pass at either 100Hz/12db slope or 150Hz/18db slope. I recently acquired the DQ LP-1 and was curious if it would work.
Showing 4 responses by rodman99999
Bbro- You'll have much cleaner sound if you find either(new) polypropylene or polystyrene caps for the hi pass filters. If you need impedence matching resistors: use Vishay bulk foil. I got mine from Michael Percy. WBT makes some really nice RCA jacks for PCB mounting, that are perfect for the DQLP-1(no modification needed to install). I've forgotten the part number, but will look it up later, if you're interested. |
The manual gives the matching instructions and formula: https://sites.google.com/site/mpbarney/home/dahlquist-dq-lp1 Some of the original Dahlquist crew, might be able to help, with your other requests/questions: http://www.regnar.com/supported-models.html |