For Free??!! Totally outrageous.
You have really nice, and 'rare' (especially in the USA: cabinets (and JBL speakers)) so restore them for sure!! I've looked at my Sansui notes and this is what I have on EC-30 model speakers.
I believe the EC series was Japanese Domestic (not international - but if they were international they were not well known), which is really cool to have for collectors. Extremely nice. Super collectors stuff and sound great! The EC-30 model seem to be 'highly desired' in Japan which is proven by the fact that they rarely come up for auction. Make that...almost never. I've watched Yahoo Japan every day and I've never seen them on Yahoo Japan. Well, in the last 5 years maybe once, or twice at best, like that.
If all else fails, you could contact JBL to refirbrish the individual speakers and crossovers. That's what I would do. They would be like new when they are done and they can check out the speakers to make sure they are on specification. But I'm sure others here in AK could refirb the speakers, or a professional speaker repair facility. Crossovers for sure would go to JBL for total restoration.
Here is some information on EC speaker systems, including the EC-30, that you may find useful or helpfull. If you need more information on EC speakers, accessories, or photos, PM me.
(P.S. I'm excited and they aren't even mine!! haha.)
Some of the known EC speaker models that I know of: Made in 1978 (around).
Model - Cabinet 'only' cost.
EC-10 unknown
EC-11 50,000 yen
EC-12 28,000 yen
EC-20 60,000 yen
EC-21 27,000 yen
EC-30 42,000 yen (That's like $350 to $400+)
EC-138 N/A
EC-146 N/A
RK (or/RX?)-100A(B) 9,000 yen
(only seen 1 photo of this item ever. Some kind of single 'speaker' enclosure.
A few other Sansui/JBL collaboration speakers:
Year 1973: SP-505J (88,000 yen)
Year 1973: SP-707J (176,000 yen)
Year 1979: SP-LE8T (and maybe some others in this series type): 71,500 yen
Monitor 2115 (JBL 2115), 40W, 92.5dB/W
Monitor 2120 (JBL 2120), 60W, 99dB/W
Monitor 2130 (JBL 2130), 100W, 101dB/W
Monitor 2231A JBL/Sansui Furanken 3.
Monitor 2402
Monitor 2405
Monitor 3105
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Items and part numbers for EC cabinets:
EC Ducts (woofer ports): So you can set them up for the type of room you are playing speakers in.
* For EC-30 specifically *:
Ducts: 2 sizes. Model number/type
D-5: Short deep bass reflex duct
D-6: Medium (or long) deep bass reflex duct
CB-2: solid insert plate cover
30-05: small hole insert plate cover
30-20: large hole insert plate cover
(From Japanese Website translated with babelfish)
EC-10 (* just for some information which is probably much the same for the EC-30 listed below *)
In order to pull out the efficiency of the speaker unit of JBL to the maximum, Sansui planned the enclosure which was also developed with JBL jointly. As for EC-10 the 38cm aperture woofer which includes the unit for the professional JBL and it is designed to be the structure which can mount the wide range type speaker. As for the unit which it can mount, 136A, 130A and LE15A etc. It becomes the total 10 type of woofer 7 type and wide range type speaker 3 type which begins D130.
The pipe duct 4 has belonged, the speaker unit which mounts adjusting to the condition of quality and the room, it can exchange the pipe duct. We use the material which is selected to the enclosure.
** The baffle plate which adopts the isopachous plywood which uses the north European product cherry tree which is the high-class material and finishing blow structure is adopted. In addition, the Douglas fir and the yellow are used to the stiffener.**
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EC-30:
JBL/SANSUI EC-30 - In order to pull out the efficiency of the speaker unit of JBL to the maximum, Sansui and JBL jointly developed and designed this enclosure. The 20cm aperture speaker unit of JBL (LE8T and D208, 2110) it can mount 3 types. In addition, to cone type it is possible also to add the tweeter LE20.
Sansui and JBL LE8T and D208, it is the BOX which was developed in order to make efficiency of 2110 and the like full show jointly. To cone type it is possible to add tweeter LE20. It is the BOX which pulls out the good quality of LE-8T which is in the midst of simultaneous exhibiting truly. There is an elasticity in bass, the sound which bounces well, having heard, is pleasant. ***This speaker does not come out often, even in the auctions ***. Rating of type Content volume 48L external size width 390× height 590× depth 290mm weight 16kg.
Original 20cm aperture, because for 25cm aperture (2120, E110 and LE10) it has become, please note.
In order to pull out the efficiency of the speaker unit of JBL to the maximum, Sansui planned and built the enclosure which was developed jointly with JBL.
To mount the 20cm aperture speaker unit of JBL it is possible EC-30. Speaker unit LE8T and D208, can mount 3 types of 2110.
In addition, to cone type it is possible to add eater LE20.
To the pipe duct which responds to the quality of the speaker unit which mounts and the sub baffle plate.
External Size: Width 390 × height 590 × depth 290mm (+ grille 30mm)
Content volume 48L
Weight 16Kg
Accessory duct 2 (100Φ×90mm and 80Φ×110mm)
4 baffle plates (LE20 and for 075,077,2405,2402)
Type Enclosure
Content volume: 48L
External size: Width 390× height 590× depth 290mm
Weight: 16kg
Attachment: Pipe duct Sub baffle:
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JBL speaker specs: old information and maybe not complete:
■JBL：LE15A 120,000 yen
38cm
9.1kg 10.2cm
120W
8Ω
94dB
10.2cm
9.1kg
11,000gauss
114L～338L
149mm
11.8kg
■JBL：LE85 135,000 yen
L300
19,000gauss
4.4cm
2.5cm
30W
8Ω
108dB（1kHz
4.4cm
4.5kg
19,000gauss
146×98mm
5.4kg
■JBL：HL92 52,000 yen
LE85 LE175 90゜
45゜
2.5cm
800Hz
Slant Plate
250×150×60mm
LE175、LE85
293mm
2.7kg
■JBL：L91
■JBL：2405 74,000 yen
16Ω
7.9×1.8cm
20W
105dB
6.5kHz～21.5kHz
90゜×30゜（16kHz）
65゜×25゜（20kHz）
7kHz
4.4cm
1.5kg
16,500gauss
98×83mm
2.0kg
■JBL：LX13 72,000 yen
120W
800Hz
LE15A
LE175、LE85
HL92
8Ω
2.7kg
■JBL：3106 28,000 yen
8kHz
50W
12～16Ω
12～16Ω
140×108mm
0.7kg
■SANSUI：EC-10 200,000 yen
JBL
222L
590×980×470mm
48kg
■SANSUI：EC-12 56,000 yen
JBLと
590×280×470mm
12kg
