Relisted due to buyer mistakenly believing that this was a pair of speakers.  Please note that this is only ONE speaker.  This speaker was made in the mono era.  It is the very first Duplex speaker ever made.

Original Hollywood Altec Lansing 604 Duplex speaker in VERY rare Altec factory home HiFi cabinet.  This cabinet amazingly was not opened for seventy years!  I know because I put the first screwdriver marks on the screws holding the back on... the interior is exquisite and original.  I have not taken the driver off.  The screws are perfect and original as shown.  The patina on the screws tells the entire tale.  The cabinet is an very good condition for its age.  There are some marks from items being on top and the one veneer flake from when it was unloaded from my car (sorry!  helping hand did not understand how veneer works)... the grill cloth is a bit tattered at the bottom, but that can either be replaced, or just do as my antique teacher taught me and leave everything as is:  unrestored tells the true story.  The speaker works perfectly and is VERY efficient.  We would play this speaker directly from the headphone output of my iPhone!  

Original cone as evidenced by the original part number and all paper surround.  Later models have the cloth surround.  VERY rare.

original brochure here:  

https://www.technicalaudio.com/pdf/Duplex_Speakers_related_to_Altec_604/604_1944_604_Duplex_Speaker.pdf



Specifications:

  • Original Altec 604 (there was no 604"A")
  • 15" Duplex Speaker - with permanent magnets
  • Magnets: Alnico V
  • Power Rating: 25 Watts
  • Free Air Resonance: 38Hz
  • Response: 60Hz-16kHz
  • Crossover: 2000Hz
  • Network: N-2000-A (also N-2000-B) - series filter networks
  • Network input impedance: 20 ohms
  • Phase Plug: Circumferential
  • Multicell HF horn: 6x 20° square cells for 60° horizontal and 40° vertical
  • Cone: all paper cone
  • Frame: 15.2" cast frame, rear mount, black finish
  • Weight less network: 34 pounds

This item can ship via UPS Ground in the United States, but please note that the calculator was not working, so the flat rate shown is for Bellingham, WA.  Nearly every location in the continenetal United States will be much cheaper.  I will refund the difference.  Please contact me if you woul like a more accurate shipping cost.  Thank you!

If you would like international shipping, please contact me.  I can pack very well, but buyer would need to arrange shipping.

Thank you!