Philips NTX600, Service Manual

Page: 23 / 45

Reference: WX-B-009-01 Title: Product Performance Specification
Model : NTX800 Page 21 of 25
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DISTORTION
(THD)
See driver spec See driver spec
On IEC baffle, 1/3
octave smoothing,
input power
providing 94dB SPL
in typical frequency
range
Magnet material
and shielding
version
130mm ferrite
magnet
Coaxial-4”: 80mm
ferrite;
Coaxial-tweeter:
NdFeB magnet
Diaphragm
material
Paper cone, foam
surround, 50mm PI
VC,
Coaxial-4” mid: paper
cone, cloth edge, PI
coil;
Coaxial-tweeter:
13mm silk dome
tweeter
Frame
≥ 6 holes for screw
mounting ≥ 4 holes for screw
mounting
Leakage
prevention
Cushion
1mm thick EVA on
back of basket 1mm thick EVA on
front of basket
6.5 Speaker Box Specifications
No. Item Requirement
Test condition /
description
CROSSOVER filter target
complexity
Active cro one
capacitor in coaxial;
Add PTC circuits on
tweeter
To be confirmed by
listening test
Net internal acoustic volume
> 2 x 50L
Net volume excluding the
wood thickness and
electronics.
Bass port /Passive radiator
design
Sound pipe, size: D150 x
180mm, fB: 50Hz
Passive Radiator
n/a
Speaker box material and
thickness
MDF or PB, 12-15mm
Internal construction
Must match Vibration and
Buzz and Rattle noise
requirements.
Please refer to following
sections for tests
description on “Buzz and
Rattle noise” and
“Vibration”
Speaker driver mounting
Screws
Leakage Prevention
Approaches
Airtight joints may be
used for speaker, vent,