ALTEC 알텍 명기 604D Duplex 스피커 입니다 -마지막 후기모델-(ending)

 

 

 

 

604D

1957 and available special order as late as 1964

Altec 604D 15" Duplex Speaker Magnets: Alnico V Power Rating: 35 watts, 50 peak Free Air Resonance: 25Hz Response: 30Hz - 22kHz Crossover: 1600 Hz Network: N-1600-A - series filter network Impedance: 16 ohms nominal Phase Plug: Circumferential HF horn: 6-section sectoral-style horn with divider vanes - 90° horizontal and 40° vertical Cone: early versions had paper with half-roll surround and later had paper w/ corrugated cloth accordion 'viscous compliance damping and annular spider' Frame: 15.2" cast frame, rear mount, green hammertone Weight with network: 40 lb. (?) comment: 604D was in the 1957 catalog but Altec was trying to shift to 605 Duplex so 604D was "superceded" by 605 in 1959 catalog - 604D continued as a special order item for pro users i.e. recording studios

 

 

ALTEC 알텍 명기 604D Duplex 스피커 입니다. 50년대 마지막에 발매된 제품으로서 잘아시는 604E 모델의 형님벌

 

제품이자. 알텍 고전적인 다이아프렘 드라이버 방식의 알니코 스피커 유닛입니다. 15인치 프레임에서 고음 중음 저음

 

모두 재생해주는 Duplex 듀플렉스 방식이자. 알텍만의 탁월한 중,고역대와 감칠맛이 일품인 스피커 입니다. 사진과

 

같이 유닛트는 주황색 주름엣지로 구성된 후기모델 이며  다이아프램 상태 역시 극상품 수준으로 우수한 스피커

 

입니다. 오리지널 인클로우져는 아니지만. 제일케이스 작품인 켄터베리 15인치 인클로우져 대형 사이즈에 수납되어

 

있으며 인클로우져가 건조된 년식이 10년이상된 제품이기에 울림역시 출중합니다. 604D 스피커가 모든 알텍 동축형

 

타입 스피커중 매칭해서 울리기가 가장 쉬운걸로 알려져 있으며 피셔나 스코트 엠프중 7591 출력관을 사용한 제품과

 

매칭이 가장 우수합니다.  인클로우져는 대형기다 보니 이동중 생긴 생활감이 묻어 있습니다. 임피던스 16옴 이며

 

오리지널 네트워크 채용되어 있으며 어테뉴에이터 작동 잘됩니다.

 

 

Altec 604 HISTORY

Read and comment - additions or corrections?

the Altec User's Boardwas a good start for this and then I added and corrected as I saw fit.

great source for Altec info...

http://www.hostboard.com/cgi-bin/ultimatebb.cgi/ubb/forum/f/ 3729

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:   


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


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:   



Altec 604 Parts
Great Plains Audio
http://www.greatplainsaudio.com/

604-E, 16LN
WOOFER / R604-16E / 16Ω
TWEETER / 34852** / 16Ω


604-HPLN
WOOFER / R904/604-8HP / 8Ω
TWEETER / 34852** / 16Ω

604-8G
WOOFER / R604-8G / 8Ω
TWEETER / 34647** / 8Ω


604-8H
WOOFER / R604-8H / 8Ω
TWEETER / 34647** / 8Ω

604-8K
WOOFER / R604-8K / 8Ω
TWEETER / 34647** / 8Ω

R604-16HPLN, 126HPLN, 16X
WOOFER / R604-16HP / 16Ω
TWEETER / 34852** / 16Ω

604-168X
WOOFER / R904/604-8HP / 8Ω
TWEETER / 34852** / 16Ω

**NOTE: Requires diaphragm kit




A 604 compendium! Thank you.
Here are some additions & corrections.

1943
Field coil Altec Duplex 15"  Model 601
Completely different from the 12"  601A introduced in the mid 50's.
Power rating: 25 watts
Xover: 1200 Hz
Multicell HF horn
Network input impedance: 12 ohms
http://www.lansingheritage.org/images/altec/catalogs/1943/pa ge04.jpg

1944
Original Model 604 (not "A")
Alnico magnet
Power rating 25 watts
Xover: 2000 Hz
Multicell HF horn
Network input impedance: 20 ohms
Free air resonance: 38 Hz
http://www.lansingheritage.org/html/altec/catalogs/1945-dupl ex.htm
Note: Model 605 was a cabinet back then.

1949
Model 604B
Multicell HF horn

Model 604C
Sectoral HF horn
Same HF horn used until Manta Ray introduced on 604-8H
http://alteclansingunofficial.nlenet.net/Duplex.html

Model 604D
Free air resonance: no greater than 40 Hz
Cone: paper w/ viscous compliance damping and annular spider
http://img.villagephotos.com/p/2003-8/354094/altec604scan.jp g

re: 604 vs. 605
It seems Altec tried to phase out 604 production with the introduction of the 605. The 605 was 3 dB less efficient due to it's smaller magnetic structures. Hence the special order 604D for professional users who required the efficiency.. Altec reintroduced the 604 as a standard cataloge item with the "Super Duplex" 604E .
604 - 802 HF driver (15,250 gauss) / 515 LF driver (14,750 gauss)
605 - 806 HF driver (13,000 gauss) / 416 LF driver (12,000 gauss)
http://www.lansingheritage.org/images/altec/catalogs/1971-ho me/page24.jpg