Instruction/ maintenance manual of the product D 4 JAMO
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Technical Description Jamo D 4 Concept.
2 Technical Description Jamo D 4 Concept Contents: 1. General system description 2. The products: 2.1. D 400 2.2. D 430 2.3. D 450 2.4. D 4CEN 2.5. D 4SUB 3. Driver explanation 3.1. Tweeter 3.2. Mid-woofer/woofer 3.3. (Sub) woofer 4. Electronics (D 4SUB) 5.
3 General description With the Jamo D 4 Concept the goal was to create “the link” between high-end hifi and - surround sound and at the same time focussi ng on versatility – or flexibility – in system configuration and placement.
4 Wall mount: The rear wall “amplifies” low frequencies and the floor actually gives a dip in approximately the same range due to the first floor reflection reaching the ear in opposite phase with the direct sound from the speaker. The speaker can be used as full range.
5 D 450 D 450 is a 2½ way dual bass re flex system featuring a 6½” woofer, a 6½” mid-woofer and a 1” DCD tweeter. The 2½ way configuration has sort of become a hallmark of Jamo. We are using this configu ration in a number of products starting with our highly acclaimed D 870 speaker.
6 D 4CEN D 4CEN is a 2 way bass reflex system featuring two 4½” woofers and a 1” DCD tweeter. The design of D 4CEN is kept as compact as possible in order to make it easier to place the speaker close to the TV set. So, the height of just 16-cm/6.
7 As mentioned the D 4SUB goes very low in or der to reproduce the extreme bass contents of movie soundtracks with full authority. However, under certain circumstances this can create a problem, which is why some decoders feature a Boundary Gain Compensation filter.
8 Drivers Tweeter The tweeter in the D 4 range, has already been well acclaimed in Jamo products, as it is used in th e Jamo D 7 THX Ultra2 system, winner of the EISA awar d as “High-end Home Theatre 2002/2003”. However, to suit the exact purpose in D 4 , we developed a new, asymmetric front baffle.
9 In fact, the choice of “mot or” materials makes use of magnetic oil for cooling and resonance damping unnecessary! All these features in combination allow the diaphragm to move effortless and the result is a very natural, detailed, dynamic and open sound reproduction.
10 However, the anodised aluminium ce ntre plug is probably the most conspicuous feature of the D 4 woofers. It replaces the traditional dust cap in the centre of the loudspeaker cone at the place where the dust cap would normally be mounted - thereby making the cone lighter and thus faster.
11 (Sub)Woofer The 8” woofer features a vented magnet system and a Ø 38 mm / 1½” aluminium voice coil former. The 4-layer voice coil is 28 mm / 1.
12 Cabinets All D 4 cabinets are made of heavy MDF board , a solid and resonance dead base for the drivers to work in. However, the most remarkable cabinet feature is probably the Double Curved front baffle. It is common knowledge that one of the most rigid constructions at all is a round shape; a ball, an egg etc.
An important point after buying a device JAMO D 4 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought JAMO D 4 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data JAMO D 4 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, JAMO D 4 you will learn all the available features of the product, as well as information on its operation. The information that you get JAMO D 4 will certainly help you make a decision on the purchase.
If you already are a holder of JAMO D 4, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime JAMO D 4.
However, one of the most important roles played by the user manual is to help in solving problems with JAMO D 4. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device JAMO D 4 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
