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LX521.4
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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
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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
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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
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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 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
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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 |
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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 |
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| 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.
 
 
  
Contact: Dr. Frank Brenner,
info@magicLX521.com
Plans/License is required to purchase
kits and assembled systems. | Terms
& Conditions |
Send proof of Plans/License ownership to <plans@magicLX521.com> |
| 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.
Contact: Dr. Frank Brenner,
info@magicLX521.com
Plans/License is required to purchase
kits and assembled systems. | Terms
& Conditions |
Send proof of Plans/License ownership to <plans@magicLX521.com>. |
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@magicLX521.com
Plans/License is required to purchase
kits and assembled systems. | Terms
& Conditions |
Send proof of Plans/License ownership to <plans@magicLX521.com>. |
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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@magicLX521.com
Plans/License is required to receive pre-loaded LX
DSP filters. | Terms
& Conditions |
Send proof of Plans/License ownership to <plans@magicLX521.com>,
if already bought.
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LX521.4
Loudspeaker System
Loudspeakers / DSP /
Pre-amplifier / 8 Power-amplifiers
The System consists of:
2x Loudspeakers
- Top baffles and bridges are custom built in
various precious veneer plywood types.
- Choose your preference! Standard and popular
selections are e.g. Bubinga, American Walnut, Paduk, Mahogany and
Oak. Surfaces are finished by oil, or transparent lacquer (dull /
silk gloss).
- Upgrades to 3-layer massive wood types (e.g.
Oak, Cherry, Walnut or Ash) or to Panzerholz possible.
- Hidden cabling in all aspects.
2x PowerBox 6pro NCore
- Everything between your CD-player and LX521 in two slim cases
- LX521.4 requires one PowerBox per side, interconnected by CAT6 network
cable
One PowerBox as MASTER and a .PowerBox as FOLLOWER.
-
High-end Hypex DSP, preamp and multiple NCore power amplifiers,
analog and
digital inputs, remote volume
2x Speaker cable
- Between PowerBoxes and LX521
Worldwide shipping of LX
system in
four parcels: e.g. EU 96 / US&CAN 319 / World
399 / Insurance 60
Due to weight restrictions per parcel, upper woofer drivers ship in a
separate parcel and must be inserted by customer with 8
bolts&nuts.
Inquire about alternative shipping as one 120kg airfreight pallet of
fully assembled (all woofer drivers inserted) and tested loudspeakers:
ca 800 to 1000 from Germany to the US.
Worldwide shipping of
Electronics: e.g.
EU 25 / US&CAN 79 / world 85, plus
15 insurance
Includes License/plan fee to
www.linkwitzlab.com
EU residents add 19% VAT
Mahagony
Bubinga
Walnut
Walnut
 
 
3-layer massive oak,
oiled Paduck
Hidden
cabling
Top: black Panzerholz
Bridge: Makassar Ebenholz
45
degree miters at bridge
Contact: Dr. Frank Brenner, info@magicLX521.com
Plans/License is required to purchase kits and
assembled systems. | Terms
& Conditions |
Send proof of Plans/License ownership to <plans@magicLX521.com>,
if already bought.
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