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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

 

 

 

LX521.4 Construction Plans/License
and ATI Amplifiers from

www.linkwitzlab.com

LX521.4 Construction Plans/License .... $155
Plans/License is also required to purchase kits and assembled systems. 

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

 

LX521.4 turnkey systems

Turnkey systems in many wood types of choice or as alu-panzerholz sandwich are made in Germany. Pictures and samples on www.LINKWITZ.com and the gallery

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 DSP Module from www.miniDSP.com

miniDSP 4x10 HD .... $499
miniDSP 4x10 plug-in / 96kHz processing .... $10
2-in analog, 2-in digital, 8-out analog, 2V, local knob and remote volume




 

 

LX521.4 ASP Assemblies & PCB's from www.hairballaudio.com

LX521.4 Analog Signal Processor with balanced and RCA inputs

Mako Natsume writes: 
I offer via Hairball Audio the ASP.4 PCBs on their own, as well as in a 5 piece set for the Hammond case. Two boards are the ASP.4s, another is a power supply that can be configured to accept an external Mean Well +/-15 GP50A14E-R1B, or an externally housed center tapped transformer like the Hammond 1182J15 that can also connect through the DIN plug. The power board also has an option for balanced inputs using THAT devices. The other two boards are panels that will fit the Hammond case with countersunk holes. It is intended to double as a template that users can create their own panel with.

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 precision ASP from www.LINKWITZ.store

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





 

LX521 Wood Kit from www.madisound.com

Flat-pack wood parts and related items .... $580
  • (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 |   

 



 

LX521.4 System Kit from www.madisound.com

LX521.4 Kit .... $2547
The LX521.4 Kit includes: 4-Woofers, 2-Lower midrange drivers, 2-Upper midrange drivers, 4-Tweeters, miniDSP 4x10HD, Flat-pack wood parts and related items ($580)
DSP with analog and digital inputs, and remote volume control. A separate preamp is not needed.
The DSP drives the 8x 150W or 10x 50W power amplifiers required for the system.

               

      

Contact: Adam Johnson 

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



 

 

LX521 hidden cables wood kit by www.LINKWITZ.store

50% pre-assembled LX521 Wood Kit in birch plywood or dark anthracite HDF

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.

 

     

   

SpeakOn8 in bridge foot

 

 

 

 

 

 

 

 

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>

 



 

LX521.4 hidden cables full kit by www.LINKWITZ.store

50% pre-assembled LX521 Wood Kit, incl. 12 SEAS drivers ....

Worldwide shipping: e.g. EU 96€ / US&CAN 319€ / World 399€

EU residents add 19% VAT 

Features:

  • CNC precision milled from best quality birch plywood 
  • Machine calibrated top baffle thickness
  • Top baffles assembled and glued, hidden cables
  • Baffle supports assembled and glued
  • Bridges with hidden cable canals
  • Bridges with hidden stability bracket 
  • V-frame woofers with hidden cable canals in side panels  
  • V-frame woofer with 45deg front joints  
  • dowel joints avoid visible screws  
  • Internal cables  
  • Dowels, screws, screw clamp

Kit does not contain: paint, glue, plans/license from www.linkwitzlab.com.

               

     

    SpeakOn8 in bridge foot

 

 

 

 

 

 

 

 

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>.

 



LX521.4 hidden cables ComfortKit AmerWalnut www.LINKWITZ.store

75% pre-assembled LX521 Kit, incl. 12 SEAS drivers ....

Worldwide shipping: ca. EU 96€ / US&CAN 319€ / World 399€

EU residents add 19% VAT 

Features:

  • CNC precision milled from best quality  
    American Walnut veneered birch plywood and HDF (woofer)
  • Machine calibrated top baffle thickness
  • Top baffles assembled and glued, hidden cables
  • Baffle supports assembled and glued. Slim baseplate.
  • Bridges with assembled (!) with 45 deg miters and hidden cable canals 
  • Bridges without feet, SpeakOn 8 pole plug holder.integrated.
  • V-frame woofers in dark anthracite HDF  with hidden cable canals in side panels  
  • V-frame woofer with 45deg front joints  
  • dowel joints or lamellos to avoid visible screws  
  • Internal cables  
  • Dowels, screws, screw clamp

Kit does not contain: paint, glue, plans/license from www.linkwitzlab.com.

          

DIY part: Woofer V-Frame assembly, (Clear) lacquering, Driver insertion an cabling according construction plans.

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>.

 



 

 

LX521.4 Electronics from www.LINKWITZ.store

 

DSP / Pre-amplifier / Power-amplifiers

 

  

 

2x PowerBox 6pro NCore (Master & Follower 2x €2490)
See Burning Amp 2016 and Open House 2017 and PB 6pro PDF

2x Speaker Y-cable .... 
Between PowerBoxes and LX521, 
Two 5m cables with three "1-click” SpeakOn connectors per cable, 8x 2,5mm² conductors 

Worldwide shipping: e.g. EU 25€ / US&CAN 79€ / world 85€, plus 15€ insurance

EU residents add 19% VAT

  • The PowerBox 6 pro NCore is a preamp with volume control, a 6-ch DSP with 6ch-DAC, feeding 6 NCore amplification channel (power amplifier) in one slim but massive powder-coated aluminum top with brushed stainless steel front plate.
  • Digital inputs: RCA, optical, XLR, AES/EBU, USB
  • Analogue inputs: Two pairs of true balanced analogue inputs (RCA-XLR converter cables available)
  • Optimized, fully balanced internal system layout, allowing shortest signal traces, minimizing losses and artifacts.

 

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

Plans/License is required to receive pre-loaded LX DSP filters.  | Terms & Conditions |
Send proof of Plans/License ownership to <plans@LINKWITZ.store>, if already bought.

 

 

 

 

LX - Loudspeaker Store

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

        

 

 

 

 

What you hear is not the air pressure variation in itself 
but what has drawn your attention
in the streams of superimposed air pressure variations 
at your eardrums

An acoustic event has dimensions of Time, Tone, Loudness and Space
Have they been recorded and rendered sensibly?

___________________________________________________________
Last revised: 02/15/2023   -  © 1999-2019 LINKWITZ LAB, All Rights Reserved