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Dahlquist DQ-LP1 Electronic 2 Way Crossover with Rare Rack Mount

Sale price$0.00
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Pickup currently unavailable at SkyFi 479

Dahlquist Dq-Lp1 Electronic 2 Way Crossover Withe Rare Rack Mount Accessory

Dahlquist DQ-LP1 Electronic 2 Way Crossover with Rare Rack Mount

SkyFi 479

Pickup currently unavailable

479 South Broad Street
Glen Rock NJ 07452
United States


Very very rare EQ from Dahlquist. This was all the rage back in the day.

We've only seen one or two come up for sale in the last 5 years, so don’t miss your chance. This also the first we've seen with the rack mount kit included.

"The Dahlquist DQ-LP1 is a unique line-level crossover which combines an electronic Low-Pass filter with a passive High-Pass filter.

The LP1 is intended primarily for integrating a subwoofer into an otherwise full range loudspeaker system. It may also be used to bi-amplify a single loudspeaker system where the crossover point is tunable from 40 Hz to 400 Hz. 

As with other electronic crossovers, the LP1 is connected between the preamplifier and the two power amplifiers; one amplifier feeds the main speaker, the other drives the subwoofer(s). 

The active Low-Pass section, which feeds the subwoofer amplifier, is continuously variable from 40 to 400 Hz and provides a cut-off rate of 18db per octave. This steep slope is achieved through a non-ringing, staggered arrangement of 6-12-18 db/octave slopes, preserving bass transients. Distortion is exceptionally low, measuring 0.005% THD. 

Of particular importance in a device of this type is the performance of the High-Pass section which feeds the main power amplifier. Any distortion introduced in this stage will noticeably degrade the important middle and upper frequencies. In order to avoid such degradation, the 6db/octave High-Pass section of the LP1 is purely passive and can be set for any desired crossover frequency by inserting a capacitor and/or resistor into the terminals provided on the LP1's printed circuit board. 

The front panel frequency control does not affect the High-Pass frequency. Push-button switch S1 allows complete passive defeat of the High-Pass section and muting of the low frequency section to instantly restore the system to single amplifier operation."

Single Owner

RCA inputs and outputs

General Sound:
Smooth, uncolored, undistorted natural and clean

Cosmetic Condition:
8/10 = Very Good. Excellent front faceplate, one minor flaw on chassis side or top.. See our detailed rating description here.

Working Condition:
Working perfectly and tested in our lab.

Just the unit and power cord.

Will be packed using our highly developed in-house process and custom packing materials.Weight:
10 lbs.

Approximate Age:

Recommended Cables:

Kimber Kable - RCA Interconnects - Better

Kimber Kable - RCA Interconnects - Best

SKU: 104498