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LX - Loudspeaker Store

LXmini  --  LXmini+2  --  LXstudio  --  LX521.4

LX521.4

The LX521.4 exemplifies the best of what I have observed and learned in 50 years of experimentation about rendering stereo recordings in domestic living spaces. I love music. Life's circumstances prevented me from learning to play an instrument, but I make up for it by enjoying the creations of great composers and the art of musicians. I have designed speakers first of all for myself and free of commercial pressures. With the LX521.4 I have arrived at a level of performance, which makes me search no further. Instead I gratefully enjoy what I can hear. I excuse the recording/mixing engineer for his or her imprint and marginal acoustic scene capture, as long as the music still comes through. As hired engineers they work within a set of imposed limitations, one of which is the typical monitor loudspeaker.

The LX521.4 is a 4-way loudspeaker, designed as full-range dipole, for flat on-axis and off-axis response in the horizontal plane and frontal hemisphere. The speakers need breathing room of at least 1 m to the nearest large reflecting surfaces and a room with a minimum floor size of 25 sqm. 

The LX521.4 can be built DIY from a Kit for around $3300, including a miniDSP 4x10HD equalizer/crossover. Additionally, the speaker requires between 8 to10 power amplifiers of 50 W to 200 W. 

SL - 8/16

AT6012 Power Amplifiers (12x 60W/ch) .... $1950
AT528NC Power Amplifier (8x 200W/ch) .... $3495
Alternatively provide ten power amplifiers (10x 50W/ch minimum & identical voltage gain for each channel, <0.03% dist.)

CA residents add 9% Sales Tax

  Take a look at a Digital Stereo Sound System example
Check out your system and hearing with a Phantom Image Test

Shipping worldwide in wooden airfreight boxes. shop

Features:

• CNC precision milled from best quality wood or aluminum
• Top baffles  with hidden cables
• Topbaffle, baffle supports and bridges side-cut appearance either ply, sandwich or fully veneered
• Baffle supports 45 deg mitered in minimized form factor
• Bridges with hidden cables and SpeakON 8pole plug
• Bridges in slim design (no stands).
• V-frame woofers with invisible canals in side panels.
• V-frame woofer with 45deg front joints
• HighEnd DSP, mated with NCore amplification into slim PowerBoxes
• Optional : precision ASP (analog 8-ch active crossover between your analog source and your 8-ch power amp
• Easy connection with professional multicore cables and heavy duty multi-pole SpeakOn plugs

Contact: Dr. Frank Brenner, info@LINKWITZ.com

LX521.4 Analog Signal Processor with balanced and RCA inputs

See LX521.4 Supplies

LX521.4 ASP with through-hole components - $1199

LX521.4 ASP blank circuit board for through-hole components - $150/pair

LX521.4 ASP with surface mounted components - $999

Power Supply pcb with balanced input option,
Front and rear panels for Hammond case - $75

LX521.4 Analog Signal Processor with balanced inputs and outputs. 
Adaptors for RCA available

There is a new, enhanced ASP for LX521.4 available. 

Based on  physically small feedback loops with single OpAmps and tight component tolerances for improved L/R channel matching. 

A two step rumble  filter for phono application may be switched into the signal path.

See LX521.4 Supplies

• (2) LX521 Flat Pack cabinets
• (36) OX8PAN1 Phillips head wood screws – enclosure assembly
• (20) OXSOCKET6X3_4 Hex head wood screws – mount midrange drivers to baffle
• (32) OXTNUT10-24 Socket head cap screws – mounting woofers to V-frame enclosure
• (8) 1.5” x .75” steel inside corner braces - for woofer bridge
• (16) Quick Connects for woofers, lower mids and upper mids
• (4ft) 19 awg solid copper wire for tweeters – strip coating off ends, solder to tweeter tabs

      No SEAS drivers included ($1478)

Contact: Adam Johnson     

Plans/License is required to purchase kits and assembled systems.  | Terms & Conditions |   

Contact: Adam Johnson 

Plans/License is required to purchase kits and assembled systems.  | Terms & Conditions |   

Worldwide shipping: e.g. EU 55€ / US&CAN 159€ / world 199€ , prices vary when 12 SEAS drivers ship with the kit.

EU residents add 19% VAT 

Features:

• CNC precision milled from best quality birch plywood or dark anthracite HDF
• Top baffles fully assembled and glued, hidden cables
• Baffle supports assembled and glued
• Bridges with hidden cable canals and mounted SpeakON 8pole plug holder
• Bridges with hidden stability bracket 
• V-frame woofers with hidden cable canals in side panels  
• V-frame woofer with 45deg front joints  
• dowel joints avoiding visible screws  
• Internal cables  
• Dowels, screws, screw clamp, metal Neutrik SpeakOn 8 pole plugs

Kit does not contain: electronic crossover/amp/amp-cables, paint, glue, plans/license from www.linkwitzlab.com.

Contact: Dr. Frank Brenner, info@LINKWITZ.store

Plans/License is required to purchase kits and assembled systems.  | Terms & Conditions |
Send proof of Plans/License ownership to <plans@LINKWITZ.store>