Kaitai Shinsho vol.16 JBL D30085 HARTSFIELD Original vs. replica Description Kenji Kondo and Hiroyuki Satake, photography Hiroyuki Satake The love to a speaker is the highest technology of JBL. I think that it is "JBL HARTSFILD" which should just be called vintage audio, and the speaker which does not get bored even if it is watching even now all day long. From 1950〜1970, the speaker was just structure of gorgeous furniture itself. I think that JBL PARAGON, Olympus, and Hartsfield, etc. were made by the basis of such thought. (Kondo) |
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This time, since two sets of the Hartsfield were in stock, this is the uncanny rare opportunities, I made the comparison form. The left is original and the right is replica. (Satake) |
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The color has not applied that of a replica. There is also no hole which sticks a network. The rest is almost same. (Satake) |
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It just removed up board. It is the same except a color. It seems that there are many numbers of nail has struck by the replica. (Satake) |
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The form of a back trapezoid box is delicately different. As for original, one more plank is inserted between the main part and the trapezoid box. (Satake) |
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At the replica, there are more nails also here. (Satake) |
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It is in the back of original. It seems that the lower cable was not used for the network. The upper square is the network back side. A thing like sponge is attached. I think that it attached later. (Satake) |
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It is a network. (Satake) |
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A number is N500. (Satake) |
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Although details are delicately different, as for the replica, that it is greatly different has stuck felt on the wall of a port. As for original, glass wool is contained in the port. (Satake) |
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Original is applied black into this. (Satake) |
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The Hartsfield of these two pairs are the model of the stereo age. It is said that the back and main part of a trapezoid are the one in the early times. |
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It just removed woofer. I found that low-range loading is divided in the two directions at the front. (Satake) |
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It is the network of the opening of a horn. The material of a net is different. Original is also differed from the photograph in the stereo sound etc. It seems that both are re-covered. (Satake) |
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The outside pillar of net and outside net can be removed. The screw stop of the pillar is carried out later. If a screw is removed, it will separate simply. It seems that the pillar has made a few thickly for the replica. (Satake) |
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It is an opening. It looks almost the same here. It is said that this opening is also pressed down by the early thing in a little lower position. (Satake) |
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A pillar is like this. I can remove easily. (Satake) |
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Reinforcement was contained for the original. Structure is good. (Satake) |
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The terminal is changed by the original. It is the same except it. (Satake) |
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It is a driver. Original is used with the older 375. (Satake) |
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It is a leg of a replica. The speaker cable has come out from the middle of loading. (Satake) |
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It is in the state of only a main part. (Satake) |
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Although this is the board of the front of original, as for original, a board unites grain perfectly in right in the middle. (Satake) |
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It is the back side of an original net. (Satake) |
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The crevice between up board is also delicately different for original and replica. (Satake) |
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It seems that the original is old also in age. There is an aura. And the replica is also made its best considerably. There was each character also carried out the same enclosure of type. Since the structure of the Hartsfield seems to be quite complicated, I think that making a replica suffered troubles considerably. Both of two pairs were types in the second half. The internal horn is made in the form of W, it was easy to make. Only the craftsman was able to make in the company of JBL, when it was a first stage type thing. Is there any person who challenged the first stage type replica? Since the Hartsfield is the speaker which was like JBL, considered changing combination, it seems looser than a present-day speaker. (Satake) Most of the foundation of JBL technology built by founder Lancing. His advance is certainly inherited by today's speaker technology. In order that lancing may pierce through its ideal, in 1946, he started "James, B, and a lancing company" that was founded for JBL. And next year he developed the masterpiece D130 (15 inch wide-range unit). The epoch-making technology of many, such as an edge wise volume voice coil, an air molding aluminum center dome, and a powerful porcelain circuit by Alnico V, was carried, and the outstanding theory was inherited to all the portions of the present JBL. Many noted speakers build the foundation of JBL. and at the 1954, " the extreme speaker" D30085 HARTSFIELD was born . It is uncanny to have completed, a first stage type, a middle type, and last type, the graceful fall dead corner horn type enclosure of this furniture. (Kondo) |