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Double Drive Speaker System (DDSS) - Diatone DS100Z

bimotarich

bimotarich

New Member
Does anyone have any information about how the Double Drive Speaker System works? I have a pair of Diatone DS100Z speakers that utilize this system. They have a nice mellow sound that I find very pleasing. Great for vocals and excellent imaging.55391478-1E29-440E-A3D7-0D651EC27710.jpegNot my photo... will try to post photos of my actual speakers soon... but recently mounted them on the wall in a secondary system and not easy to get back down. They are paired to an Aurex SC M15 amp. Hard to find much info in English or any language really about these speakers. But I sure to enjoy them!
 
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maxhifi said:
This is commonly referred to as isobaric loading. It is not a Japanese innovation, but it looks like they invented a new name for it :)

Isobaric loudspeaker - Wikipedia
Click to expand...
That is what I thought at first too... but it is not... the speakers are not identical in size or function...the rear speaker is SMALLER... AND it is the woofer... the other is full range if I understand the design correctly... also note only the rear speaker is ported. (I want to say I read the rear speaker is 4 inches and the front is 4.5)...
 
bimotarich said:
not sure it is the same... the two speakers are not the same size nor serving the same function... the rear is smaller and is the woofer.. .the front is larger and is full range... only the rear speaker is ported...
Click to expand...

Still isobaric which cab be ported
 
bimotarich said:
That is what I thought at first too... but it is not... the speakers are not identical in size or function...the rear speaker is SMALLER... AND it is the woofer... the other is full range if I understand the design correctly... also note only the rear speaker is ported. (I want to say I read the rear speaker is 4 inches and the front is 4.5)...
Click to expand...
I double checked the sizes and functions of the speakers... 13cm full range in the front... 10cm woofer in the back... in a 1 way configuration? (I have seen in reported to be one way and two in different sources)...
(the below is translated from a Japanese website)
The DDSS has a structure in which two units are mounted in the front and rear, and the two units are driven in phase.
As a result, the rear unit supports the driving of the sealed front unit, and by driving without resistance, the reproduction capacity of the unit is maximized, and it is possible to respond quickly even at times of large input or sudden change in sound pressure. In addition, by radiating the back pressure of the rear drive unit from the bass reflex port, powerful low-frequency reproduction is possible.
The DS-100Z drives the diaphragm more smoothly by optimally designing the acoustic characteristics by computer simulation.

System 1 way, 2 speakers, a DDSS system, and a book shelf type
Magnetic-shield type (EIAJ)
Use unit Full range: 13cm
Rear drive: 10cm
Rated impedance 6ohms
Play frequency band 48Hz - 22000Hz
Output sound pressure level 87dB/W/m
Maximum input 160W(EIAJ)
Dimensions Width 156x height 244x depth of 198mm
Weight 3.9kg
 
bimotarich said:
I double checked the sizes and functions of the speakers... 13cm full range in the front... 10cm woofer in the back... in a 1 way configuration? (I have seen in reported to be one way and two in different sources)...
(the below is translated from a Japanese website)
The DDSS has a structure in which two units are mounted in the front and rear, and the two units are driven in phase.
As a result, the rear unit supports the driving of the sealed front unit, and by driving without resistance, the reproduction capacity of the unit is maximized, and it is possible to respond quickly even at times of large input or sudden change in sound pressure. In addition, by radiating the back pressure of the rear drive unit from the bass reflex port, powerful low-frequency reproduction is possible.
The DS-100Z drives the diaphragm more smoothly by optimally designing the acoustic characteristics by computer simulation.

System 1 way, 2 speakers, a DDSS system, and a book shelf type
Magnetic-shield type (EIAJ)
Use unit Full range: 13cm
Rear drive: 10cm
Rated impedance 6ohms
Play frequency band 48Hz - 22000Hz
Output sound pressure level 87dB/W/m
Maximum input 160W(EIAJ)
Dimensions Width 156x height 244x depth of 198mm
Weight 3.9kg
Click to expand...

So the rear driver is unloading the effort of the front driver to move air through the port. Interesting.

"Play frequency band 48Hz - 22000Hz"

I see no way that's happening. Maybe +- 10 DB or more.
 
kfa888 said:
So the rear driver is unloading the effort of the front driver to move air through the port. Interesting.

"Play frequency band 48Hz - 22000Hz"

I see no way that's happening. Maybe +- 10 DB or more.
Click to expand...

-10dB on axis I think it could do it. Diatone is the same company who made the famous P-610B full ranger, which is a speaker I've always wanted to try.

This looks like a variation on the theme of isobaric loading, but of course has some different details. The main advantage to the second driver though will still be allowing the cabinet to be smaller.
 
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