Altec 604 HISTORY


Altec 604A (late 40's)
HF horn: 90h40v
X-over:
Power:
Impedance: 16 ohms
Weight:
Magnet: Field Magnet (I think)
Response:
Free Air Resonance:
Frame:
Cone: all paper cone
comment:

---(여기부터 Alnico자석)

Altec 604B (early 50's)
HF horn: 90h40v
X-over: 1000 Hz
Power: 30 watts
Impedance: 16 ohms
Weight: 40 lb.
Magnet: Alnico
Response: 30Hz - 16kHz
Free Air Resonance:
Frame: wrinkled brown paint
Cone: all paper cone
comment:


Altec 604C (mid fifties)
HF horn: 90h40v
X-over: 1600 Hz
Power: 35 watts, 50 peak
Impedance: 16 ohms
Weight: 40 lb.
Magnet: Alnico
Response: 30Hz - 22kHz
Free Air Resonance:
Frame: green hammer-tone
Cone: all paper cone
comment: close sounding to the newer models
604C updated many times by Altec


Altec 604D (looked just like 604C)
HF horn: 90h40v
X-over: 1600 Hz
Power: 35 watts, 50 peak
Impedance: 16 ohms
Weight: 40 lb.
Magnet: Alnico
Response: 30Hz - 22kHz
Free Air Resonance:
Frame: green hammer-tone
Cone: all paper cone
comment: 604D was in the 1957 catalog and was not superceded by the 605 until 1959
after that 604Ds were built one-off for special customers i.e. recording studios




Altec 604E Super Duplex - 1964-65/late 60's
HF horn: 90h40v
X-over: 1500 Hz
Power: 35 watts, 50 peak
Impedance: "8 to 16 ohms" was really nominally 16 ohms
Weight: 34 lb. including network
Magnet: Alnico V magnets
Response: 20Hz - 22kHz
Free Air Resonance: 25Hz
Frame: light grey paint
Cone: paper cone with an "accordian edge" cloth surround
comment: stamped basket diameter is 15"
harder to front load


Altec 604E2 Super Duplex
HF horn: 90h40v
X-over: 1500 Hz
Power: 35 watts, 50 peak
Impedance: "8 to 16 ohms" was really nominally 16 ohms
Weight: 34 lb.
Magnet: Alnico V magnets
Response: 20Hz - 22kHz
Free Air Resonance: 25Hz
Frame: cast frame grey paint
Cone: paper cone with an "accordian edge" cloth surround
comment: later 604E called 604E2 had the later 16" cast basket and tangerine phase plug


Altec 604-8G - early to late 70's
HF horn: 90h40v
X-over: 1500 Hz
Power: 65 watts
Impedance: 8 ohms
Weight: 40 lb.
Magnet: Alnico V magnets
Response: 20Hz - 22kHz
Free Air Resonance: 25Hz
Frame: cast frame dark grey paint
Cone: paper cone with an "accordian edge" cloth surround
comment: Sensitivity was improved - 100 dB SPL, 4 ft. on-axis 1 watt input
(pink noise band limited from 500-3000khz)
cast basket easily rear or front-mount
"tangerine" phase plug came in 1976 with no change in model number
604-8G's can be found w either circumferential phase plugs
or newer radial phase plugs with no indication on the driver label.


Altec 604-8H
HF horn: 60h40v "Manta Ray"
X-over: 1500 Hz
Power: 65 watts continuous
Impedance: 8 ohms
Weight: 34 lb.
Magnet: Alnico V magnets
Response: 20Hz - 20kHz
Free Air Resonance: 30Hz
Frame: cast frame dark grey paint
Cone: paper cone with an "accordian edge" cloth surround
comment: Last of the alnico magnet models
Tangerine phase plug
introduced the newer Mantaray horn

---(여기까지 Alnico자석)


Altec 604-8K (80's/90's)
HF horn: 60h40v "Manta Ray"
X-over: 1500Hz
Power: 75 Watts continuous
Impedance: 8 ohms
Weight: 34 lb.
Magnet: Ferrite Ceramic
Response: 40Hz - 20kHz
Free Air Resonance: 28Hz
Frame: cast frame dark grey paint (16")
Cone: paper cone with an "accordian edge" cloth surround
comment: radial phase plug
more sensitive "SPL" ratings than previous model 604's
smoother HF dispersion due to the CD "Mantaray" horn
improved cross-over networks


Altec 604-8L
HF horn: 60h40v "Manta Ray"
X-over:
Power:
Impedance: 8 ohms
Weight:
Magnet: Ferrite Ceramic
Response:
Frame: cast frame dark grey paint
Cone: paper cone with an "accordian edge" cloth surround
comment: a K with a higher LF power voice coil
uses Pascolite Alluminum H.F. Diaphragm


Altec 604-16X
HF horn: 60h40v "Manta Ray"
X-over:
Power:
Impedance: 16 ohms
Weight:
Magnet:
Response:
Frame: cast frame dark grey paint
Cone: paper cone with an "accordian edge" cloth surround
comment:

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출처: 미국 Altec동호회